"""Bootstrap compiler for the L2 language. This file now contains working scaffolding for: * Parsing definitions, literals, and ordinary word references. * Respecting immediate/macro words so syntax can be rewritten on the fly. * Emitting NASM-compatible x86-64 assembly with explicit data and return stacks. * Driving the toolchain via ``nasm`` + ``ld``. """ from __future__ import annotations import argparse import ctypes import mmap import os import shlex import subprocess import sys import shutil import textwrap from dataclasses import dataclass, field from pathlib import Path from typing import Any, Callable, Dict, Iterable, List, Optional, Sequence, Set, Union, Tuple try: # lazy optional import; required for compile-time :asm execution from keystone import Ks, KsError, KS_ARCH_X86, KS_MODE_64 except Exception: # pragma: no cover - optional dependency Ks = None KsError = Exception KS_ARCH_X86 = KS_MODE_64 = None class ParseError(Exception): """Raised when the source stream cannot be parsed.""" class CompileError(Exception): """Raised when IR cannot be turned into assembly.""" class CompileTimeError(ParseError): """Raised when a compile-time word fails with context.""" # --------------------------------------------------------------------------- # Tokenizer / Reader # --------------------------------------------------------------------------- @dataclass class Token: lexeme: str line: int column: int start: int end: int def __repr__(self) -> str: # pragma: no cover - debug helper return f"Token({self.lexeme!r}@{self.line}:{self.column})" @dataclass(frozen=True) class SourceLocation: path: Path line: int column: int class Reader: """Default reader; users can swap implementations at runtime.""" def __init__(self) -> None: self.line = 1 self.column = 0 self.custom_tokens: Set[str] = {"(", ")", "{", "}", ";", ",", "[", "]"} self._token_order: List[str] = sorted(self.custom_tokens, key=len, reverse=True) def add_tokens(self, tokens: Iterable[str]) -> None: updated = False for tok in tokens: if not tok: continue if tok not in self.custom_tokens: self.custom_tokens.add(tok) updated = True if updated: self._token_order = sorted(self.custom_tokens, key=len, reverse=True) def add_token_chars(self, chars: str) -> None: self.add_tokens(chars) def tokenize(self, source: str) -> Iterable[Token]: self.line = 1 self.column = 0 index = 0 lexeme: List[str] = [] token_start = 0 token_line = 1 token_column = 0 source_len = len(source) while index < source_len: char = source[index] if char == '"': if lexeme: yield Token("".join(lexeme), token_line, token_column, token_start, index) lexeme.clear() token_start = index token_line = self.line token_column = self.column index += 1 self.column += 1 string_parts = ['"'] while True: if index >= source_len: raise ParseError("unterminated string literal") ch = source[index] string_parts.append(ch) index += 1 if ch == "\n": self.line += 1 self.column = 0 else: self.column += 1 if ch == "\\": if index >= source_len: raise ParseError("unterminated string literal") next_ch = source[index] string_parts.append(next_ch) index += 1 if next_ch == "\n": self.line += 1 self.column = 0 else: self.column += 1 continue if ch == '"': yield Token("".join(string_parts), token_line, token_column, token_start, index) break continue if char == "#": while index < source_len and source[index] != "\n": index += 1 continue if char == ";" and index + 1 < source_len and source[index + 1].isalpha(): if not lexeme: token_start = index token_line = self.line token_column = self.column lexeme.append(";") index += 1 self.column += 1 continue matched_token: Optional[str] = None for tok in self._token_order: if source.startswith(tok, index): matched_token = tok break if matched_token is not None: if lexeme: yield Token("".join(lexeme), token_line, token_column, token_start, index) lexeme.clear() token_start = index token_line = self.line token_column = self.column yield Token(matched_token, self.line, self.column, index, index + len(matched_token)) index += len(matched_token) self.column += len(matched_token) token_start = index token_line = self.line token_column = self.column continue if char.isspace(): if lexeme: yield Token("".join(lexeme), token_line, token_column, token_start, index) lexeme.clear() if char == "\n": self.line += 1 self.column = 0 else: self.column += 1 index += 1 token_start = index token_line = self.line token_column = self.column continue if not lexeme: token_start = index token_line = self.line token_column = self.column lexeme.append(char) self.column += 1 index += 1 if lexeme: yield Token("".join(lexeme), token_line, token_column, token_start, source_len) # --------------------------------------------------------------------------- # Dictionary / Words # --------------------------------------------------------------------------- @dataclass class Op: """Flat operation used for both compile-time execution and emission.""" op: str data: Any = None loc: Optional[SourceLocation] = None @dataclass class Definition: name: str body: List[Op] immediate: bool = False compile_only: bool = False terminator: str = "end" inline: bool = False @dataclass class AsmDefinition: name: str body: str immediate: bool = False compile_only: bool = False effects: Set[str] = field(default_factory=set) @dataclass class Module: forms: List[Any] variables: Dict[str, str] = field(default_factory=dict) prelude: Optional[List[str]] = None bss: Optional[List[str]] = None @dataclass class MacroDefinition: name: str tokens: List[str] param_count: int = 0 @dataclass class StructField: name: str offset: int size: int class MacroContext: """Small facade exposed to Python-defined macros.""" def __init__(self, parser: "Parser") -> None: self._parser = parser @property def parser(self) -> "Parser": return self._parser def next_token(self) -> Token: return self._parser.next_token() def peek_token(self) -> Optional[Token]: return self._parser.peek_token() def emit_literal(self, value: int) -> None: self._parser.emit_node(Op(op="literal", data=value)) def emit_word(self, name: str) -> None: self._parser.emit_node(Op(op="word", data=name)) def emit_node(self, node: Op) -> None: self._parser.emit_node(node) def inject_tokens(self, tokens: Sequence[str], template: Optional[Token] = None) -> None: if template is None: template = Token(lexeme="", line=0, column=0, start=0, end=0) generated = [ Token( lexeme=lex, line=template.line, column=template.column, start=template.start, end=template.end, ) for lex in tokens ] self.inject_token_objects(generated) def inject_token_objects(self, tokens: Sequence[Token]) -> None: self._parser.tokens[self._parser.pos:self._parser.pos] = list(tokens) def set_token_hook(self, handler: Optional[str]) -> None: self._parser.token_hook = handler def new_label(self, prefix: str) -> str: return self._parser._new_label(prefix) def most_recent_definition(self) -> Optional[Word]: return self._parser.most_recent_definition() MacroHandler = Callable[[MacroContext], Optional[List[Op]]] IntrinsicEmitter = Callable[["FunctionEmitter"], None] # Word effects --------------------------------------------------------------- WORD_EFFECT_STRING_IO = "string-io" _WORD_EFFECT_ALIASES: Dict[str, str] = { "string": WORD_EFFECT_STRING_IO, "strings": WORD_EFFECT_STRING_IO, "string-io": WORD_EFFECT_STRING_IO, "string_io": WORD_EFFECT_STRING_IO, "strings-io": WORD_EFFECT_STRING_IO, "strings_io": WORD_EFFECT_STRING_IO, } @dataclass class Word: name: str immediate: bool = False definition: Optional[Union[Definition, AsmDefinition]] = None macro: Optional[MacroHandler] = None intrinsic: Optional[IntrinsicEmitter] = None macro_expansion: Optional[List[str]] = None macro_params: int = 0 compile_time_intrinsic: Optional[Callable[["CompileTimeVM"], None]] = None compile_only: bool = False compile_time_override: bool = False is_extern: bool = False extern_inputs: int = 0 extern_outputs: int = 0 extern_signature: Optional[Tuple[List[str], str]] = None # (arg_types, ret_type) inline: bool = False @dataclass class Dictionary: words: Dict[str, Word] = field(default_factory=dict) def register(self, word: Word) -> None: if word.name in self.words: sys.stderr.write(f"[warn] redefining word {word.name}\n") self.words[word.name] = word def lookup(self, name: str) -> Optional[Word]: return self.words.get(name) # --------------------------------------------------------------------------- # Parser # --------------------------------------------------------------------------- Context = Union[Module, Definition] class Parser: def __init__(self, dictionary: Dictionary, reader: Optional[Reader] = None) -> None: self.dictionary = dictionary self.reader = reader or Reader() self.tokens: List[Token] = [] self._token_iter: Optional[Iterable[Token]] = None self._token_iter_exhausted = True self.pos = 0 self.context_stack: List[Context] = [] self.definition_stack: List[Word] = [] self.last_defined: Optional[Word] = None self.source: str = "" self.macro_recording: Optional[MacroDefinition] = None self.control_stack: List[Dict[str, str]] = [] self.label_counter = 0 self.token_hook: Optional[str] = None self._last_token: Optional[Token] = None self.variable_labels: Dict[str, str] = {} self.variable_words: Dict[str, str] = {} self.file_spans: List[FileSpan] = [] self.compile_time_vm = CompileTimeVM(self) self.custom_prelude: Optional[List[str]] = None self.custom_bss: Optional[List[str]] = None self._pending_inline_definition: bool = False def location_for_token(self, token: Token) -> SourceLocation: for span in self.file_spans: if span.start_line <= token.line < span.end_line: local_line = span.local_start_line + (token.line - span.start_line) return SourceLocation(span.path, local_line, token.column) return SourceLocation(Path(""), token.line, token.column) def inject_token_objects(self, tokens: Sequence[Token]) -> None: """Insert tokens at the current parse position.""" self.tokens[self.pos:self.pos] = list(tokens) # Public helpers for macros ------------------------------------------------ def next_token(self) -> Token: return self._consume() def peek_token(self) -> Optional[Token]: self._ensure_tokens(self.pos) return None if self._eof() else self.tokens[self.pos] def emit_node(self, node: Op) -> None: self._append_op(node) def most_recent_definition(self) -> Optional[Word]: return self.last_defined def allocate_variable(self, name: str) -> Tuple[str, str]: if name in self.variable_labels: label = self.variable_labels[name] else: base = sanitize_label(f"var_{name}") label = base suffix = 0 existing = set(self.variable_labels.values()) while label in existing: suffix += 1 label = f"{base}_{suffix}" self.variable_labels[name] = label hidden_word = f"__with_{name}" self.variable_words[name] = hidden_word if self.dictionary.lookup(hidden_word) is None: word = Word(name=hidden_word) def _intrinsic(builder: FunctionEmitter, target: str = label) -> None: builder.push_label(target) word.intrinsic = _intrinsic self.dictionary.register(word) return label, hidden_word def _handle_end_control(self) -> None: """Handle unified 'end' for all block types""" if not self.control_stack: raise ParseError("unexpected 'end' without matching block") entry = self.control_stack.pop() if entry["type"] in ("if", "elif"): # For if/elif without a trailing else if "false" in entry: self._append_op(Op(op="label", data=entry["false"])) if "end" in entry: self._append_op(Op(op="label", data=entry["end"])) elif entry["type"] == "else": self._append_op(Op(op="label", data=entry["end"])) elif entry["type"] == "while": self._append_op(Op(op="jump", data=entry["begin"])) self._append_op(Op(op="label", data=entry["end"])) elif entry["type"] == "for": # Emit ForEnd node for loop decrement self._append_op(Op(op="for_end", data={"loop": entry["loop"], "end": entry["end"]})) elif entry["type"] == "begin": self._append_op(Op(op="jump", data=entry["begin"])) self._append_op(Op(op="label", data=entry["end"])) # Parsing ------------------------------------------------------------------ def parse(self, tokens: Iterable[Token], source: str) -> Module: self.tokens = [] self._token_iter = iter(tokens) self._token_iter_exhausted = False self.source = source self.pos = 0 self.variable_labels = {} self.variable_words = {} self.context_stack = [Module(forms=[], variables=self.variable_labels)] self.definition_stack.clear() self.last_defined = None self.control_stack = [] self.label_counter = 0 self.token_hook = None self._last_token = None self.custom_prelude = None self.custom_bss = None self._pending_inline_definition = False try: while not self._eof(): token = self._consume() self._last_token = token if self._run_token_hook(token): continue if self._handle_macro_recording(token): continue lexeme = token.lexeme if lexeme == "[": self._handle_list_begin() continue if lexeme == "]": self._handle_list_end(token) continue if lexeme == "word": inline_def = self._consume_pending_inline() self._begin_definition(token, terminator="end", inline=inline_def) continue if lexeme == "end": if self.control_stack: self._handle_end_control() continue if self._try_end_definition(token): continue raise ParseError(f"unexpected 'end' at {token.line}:{token.column}") if lexeme == ":asm": self._parse_asm_definition(token) continue if lexeme == ":py": self._parse_py_definition(token) continue if lexeme == "extern": self._parse_extern(token) continue if lexeme == "if": self._handle_if_control() continue if lexeme == "else": self._handle_else_control() continue if lexeme == "for": self._handle_for_control() continue if lexeme == "while": self._handle_while_control() continue if lexeme == "do": self._handle_do_control() continue if self._maybe_expand_macro(token): continue self._handle_token(token) except ParseError: raise except Exception as exc: tok = self._last_token if tok is None: raise ParseError(f"unexpected error during parse: {exc}") from None raise ParseError( f"unexpected error near '{tok.lexeme}' at {tok.line}:{tok.column}: {exc}" ) from None if self.macro_recording is not None: raise ParseError("unterminated macro definition (missing ';')") if len(self.context_stack) != 1: raise ParseError("unclosed definition at EOF") if self.control_stack: raise ParseError("unclosed control structure at EOF") module = self.context_stack.pop() if not isinstance(module, Module): # pragma: no cover - defensive raise ParseError("internal parser state corrupt") module.variables = dict(self.variable_labels) module.prelude = self.custom_prelude module.bss = self.custom_bss return module def _handle_list_begin(self) -> None: label = self._new_label("list") self._append_op(Op(op="list_begin", data=label)) self._push_control({"type": "list", "label": label}) def _handle_list_end(self, token: Token) -> None: entry = self._pop_control(("list",)) label = entry["label"] self._append_op(Op(op="list_end", data=label)) # Internal helpers --------------------------------------------------------- def _parse_extern(self, token: Token) -> None: # extern [inputs outputs] # OR # extern () if self._eof(): raise ParseError(f"extern missing name at {token.line}:{token.column}") first_token = self._consume() if self._try_parse_c_extern(first_token): return self._parse_legacy_extern(first_token) def _parse_legacy_extern(self, name_token: Token) -> None: name = name_token.lexeme word = self.dictionary.lookup(name) if word is None: word = Word(name=name) self.dictionary.register(word) word.is_extern = True peek = self.peek_token() if peek is not None and peek.lexeme.isdigit(): word.extern_inputs = int(self._consume().lexeme) peek = self.peek_token() if peek is not None and peek.lexeme.isdigit(): word.extern_outputs = int(self._consume().lexeme) else: word.extern_outputs = 0 else: word.extern_inputs = 0 word.extern_outputs = 0 def _try_parse_c_extern(self, first_token: Token) -> bool: saved_pos = self.pos prefix_tokens: List[str] = [first_token.lexeme] while True: if self._eof(): self.pos = saved_pos return False lookahead = self._consume() if lookahead.lexeme == "(": break if lookahead.lexeme.isdigit(): self.pos = saved_pos return False prefix_tokens.append(lookahead.lexeme) if not prefix_tokens: raise ParseError("extern missing return type/name before '('") name_lexeme = prefix_tokens.pop() if not _is_identifier(name_lexeme): prefix_name, suffix_name = _split_trailing_identifier(name_lexeme) if suffix_name is None: raise ParseError(f"extern expected identifier before '(' but got '{name_lexeme}'") name_lexeme = suffix_name if prefix_name: prefix_tokens.append(prefix_name) if not _is_identifier(name_lexeme): raise ParseError(f"extern expected identifier before '(' but got '{name_lexeme}'") ret_type = _normalize_c_type_tokens(prefix_tokens, allow_default=True) inputs, arg_types = self._parse_c_param_list() outputs = 0 if ret_type == "void" else 1 self._register_c_extern(name_lexeme, inputs, outputs, arg_types, ret_type) return True def _parse_c_param_list(self) -> Tuple[int, List[str]]: inputs = 0 arg_types: List[str] = [] if self._eof(): raise ParseError("extern unclosed '('") peek = self.peek_token() if peek.lexeme == ")": self._consume() return inputs, arg_types while True: lexemes = self._collect_c_param_lexemes() arg_type = _normalize_c_type_tokens(lexemes, allow_default=False) if arg_type == "void" and inputs == 0: if self._eof(): raise ParseError("extern unclosed '(' after 'void'") closing = self._consume() if closing.lexeme != ")": raise ParseError("expected ')' after 'void' in extern parameter list") return 0, [] inputs += 1 arg_types.append(arg_type) if self._eof(): raise ParseError("extern unclosed '('") separator = self._consume() if separator.lexeme == ")": break if separator.lexeme != ",": raise ParseError( f"expected ',' or ')' in extern parameter list, got '{separator.lexeme}'" ) return inputs, arg_types def _collect_c_param_lexemes(self) -> List[str]: lexemes: List[str] = [] while True: if self._eof(): raise ParseError("extern unclosed '('") peek = self.peek_token() if peek.lexeme in (",", ")"): break lexemes.append(self._consume().lexeme) if not lexemes: raise ParseError("missing parameter type in extern declaration") if len(lexemes) > 1 and _is_identifier(lexemes[-1]): lexemes.pop() return lexemes prefix, suffix = _split_trailing_identifier(lexemes[-1]) if suffix is not None: if prefix: lexemes[-1] = prefix else: lexemes.pop() return lexemes def _register_c_extern( self, name: str, inputs: int, outputs: int, arg_types: List[str], ret_type: str, ) -> None: word = self.dictionary.lookup(name) if word is None: word = Word(name=name) self.dictionary.register(word) word.is_extern = True word.extern_inputs = inputs word.extern_outputs = outputs word.extern_signature = (arg_types, ret_type) def _handle_token(self, token: Token) -> None: if self._try_literal(token): return word = self.dictionary.lookup(token.lexeme) if word and word.immediate: if word.macro: produced = word.macro(MacroContext(self)) if produced: for node in produced: self._append_op(node) else: self._execute_immediate_word(word) return self._append_op(Op(op="word", data=token.lexeme)) def _execute_immediate_word(self, word: Word) -> None: try: self.compile_time_vm.invoke(word) except CompileTimeError: raise except ParseError: raise except Exception as exc: # pragma: no cover - defensive raise CompileTimeError(f"compile-time word '{word.name}' failed: {exc}") from None def _handle_macro_recording(self, token: Token) -> bool: if self.macro_recording is None: return False if token.lexeme == ";": self._finish_macro_recording(token) else: self.macro_recording.tokens.append(token.lexeme) return True def _maybe_expand_macro(self, token: Token) -> bool: word = self.dictionary.lookup(token.lexeme) if word and word.macro_expansion is not None: args = self._collect_macro_args(word.macro_params) self._inject_macro_tokens(word, token, args) return True return False def _inject_macro_tokens(self, word: Word, token: Token, args: List[str]) -> None: replaced: List[str] = [] for lex in word.macro_expansion or []: if lex.startswith("$"): idx = int(lex[1:]) - 1 if idx < 0 or idx >= len(args): raise ParseError(f"macro {word.name} missing argument for {lex}") replaced.append(args[idx]) else: replaced.append(lex) insertion = [ Token(lexeme=lex, line=token.line, column=token.column, start=token.start, end=token.end) for lex in replaced ] self.tokens[self.pos:self.pos] = insertion def _collect_macro_args(self, count: int) -> List[str]: args: List[str] = [] for _ in range(count): if self._eof(): raise ParseError("macro invocation missing arguments") args.append(self._consume().lexeme) return args def _start_macro_recording(self, name: str, param_count: int) -> None: if self.macro_recording is not None: raise ParseError("nested macro definitions are not supported") self.macro_recording = MacroDefinition(name=name, tokens=[], param_count=param_count) def _finish_macro_recording(self, token: Token) -> None: if self.macro_recording is None: raise ParseError(f"unexpected ';' closing a macro at {token.line}:{token.column}") macro_def = self.macro_recording self.macro_recording = None word = Word(name=macro_def.name) word.macro_expansion = list(macro_def.tokens) word.macro_params = macro_def.param_count self.dictionary.register(word) def _push_control(self, entry: Dict[str, str]) -> None: if "line" not in entry or "column" not in entry: tok = self._last_token if tok is not None: entry = dict(entry) entry["line"] = tok.line entry["column"] = tok.column self.control_stack.append(entry) def _pop_control(self, expected: Tuple[str, ...]) -> Dict[str, str]: if not self.control_stack: raise ParseError("control stack underflow") entry = self.control_stack.pop() if entry.get("type") not in expected: tok = self._last_token location = "" if tok is not None: location = f" at {tok.line}:{tok.column} near '{tok.lexeme}'" origin = "" if "line" in entry and "column" in entry: origin = f" (opened at {entry['line']}:{entry['column']})" raise ParseError(f"mismatched control word '{entry.get('type')}'" + origin + location) return entry def _new_label(self, prefix: str) -> str: label = f"L_{prefix}_{self.label_counter}" self.label_counter += 1 return label def _run_token_hook(self, token: Token) -> bool: if not self.token_hook: return False hook_word = self.dictionary.lookup(self.token_hook) if hook_word is None: raise ParseError(f"token hook '{self.token_hook}' not defined") self.compile_time_vm.invoke_with_args(hook_word, [token]) # Convention: hook leaves handled flag on stack (int truthy means consumed) handled = self.compile_time_vm.pop() return bool(handled) def _handle_if_control(self) -> None: token = self._last_token if ( self.control_stack and self.control_stack[-1]["type"] == "else" and token is not None and self.control_stack[-1].get("line") == token.line ): entry = self.control_stack.pop() end_label = entry.get("end") if end_label is None: end_label = self._new_label("if_end") false_label = self._new_label("if_false") self._append_op(Op(op="branch_zero", data=false_label)) self._push_control({"type": "elif", "false": false_label, "end": end_label}) return false_label = self._new_label("if_false") self._append_op(Op(op="branch_zero", data=false_label)) self._push_control({"type": "if", "false": false_label}) def _handle_else_control(self) -> None: entry = self._pop_control(("if", "elif")) end_label = entry.get("end") if end_label is None: end_label = self._new_label("if_end") self._append_op(Op(op="jump", data=end_label)) self._append_op(Op(op="label", data=entry["false"])) self._push_control({"type": "else", "end": end_label}) def _handle_for_control(self) -> None: loop_label = self._new_label("for_loop") end_label = self._new_label("for_end") self._append_op(Op(op="for_begin", data={"loop": loop_label, "end": end_label})) self._push_control({"type": "for", "loop": loop_label, "end": end_label}) def _handle_while_control(self) -> None: begin_label = self._new_label("begin") end_label = self._new_label("end") self._append_op(Op(op="label", data=begin_label)) self._push_control({"type": "begin", "begin": begin_label, "end": end_label}) def _handle_do_control(self) -> None: entry = self._pop_control(("begin",)) self._append_op(Op(op="branch_zero", data=entry["end"])) self._push_control(entry) def _try_end_definition(self, token: Token) -> bool: if len(self.context_stack) <= 1: return False ctx = self.context_stack[-1] if not isinstance(ctx, Definition): return False if ctx.terminator != token.lexeme: return False self._end_definition(token) return True def _consume_pending_inline(self) -> bool: pending = self._pending_inline_definition self._pending_inline_definition = False return pending def _begin_definition(self, token: Token, terminator: str = "end", inline: bool = False) -> None: if self._eof(): raise ParseError( f"definition name missing after '{token.lexeme}' at {token.line}:{token.column}" ) name_token = self._consume() definition = Definition( name=name_token.lexeme, body=[], terminator=terminator, inline=inline, ) self.context_stack.append(definition) word = self.dictionary.lookup(definition.name) if word is None: word = Word(name=definition.name) self.dictionary.register(word) word.definition = definition word.inline = inline self.definition_stack.append(word) def _end_definition(self, token: Token) -> None: if len(self.context_stack) <= 1: raise ParseError(f"unexpected '{token.lexeme}' at {token.line}:{token.column}") ctx = self.context_stack.pop() if not isinstance(ctx, Definition): raise ParseError(f"'{token.lexeme}' can only close definitions") if ctx.terminator != token.lexeme: raise ParseError( f"definition '{ctx.name}' expects terminator '{ctx.terminator}' but got '{token.lexeme}'" ) word = self.definition_stack.pop() ctx.immediate = word.immediate ctx.compile_only = word.compile_only ctx.inline = word.inline if word.compile_only or word.immediate: word.compile_time_override = True word.compile_time_intrinsic = None module = self.context_stack[-1] if not isinstance(module, Module): raise ParseError("nested definitions are not supported yet") module.forms.append(ctx) self.last_defined = word def _parse_effect_annotations(self) -> List[str]: """Parse a '(effects ...)' clause that follows a :asm name.""" open_tok = self._consume() if open_tok.lexeme != "(": # pragma: no cover - defensive raise ParseError("internal parser error: effect clause must start with '('") tokens: List[Token] = [] while True: if self._eof(): raise ParseError("unterminated effect clause in asm definition") tok = self._consume() if tok.lexeme == ")": break tokens.append(tok) if not tokens: raise ParseError("effect clause must include 'effect' or 'effects'") keyword = tokens.pop(0) if keyword.lexeme.lower() not in {"effect", "effects"}: raise ParseError( f"effect clause must start with 'effect' or 'effects', got '{keyword.lexeme}'" ) effect_names: List[str] = [] for tok in tokens: if tok.lexeme == ",": continue normalized = tok.lexeme.lower().replace("_", "-") canonical = _WORD_EFFECT_ALIASES.get(normalized) if canonical is None: raise ParseError( f"unknown effect '{tok.lexeme}' at {tok.line}:{tok.column}" ) if canonical not in effect_names: effect_names.append(canonical) if not effect_names: raise ParseError("effect clause missing effect names") return effect_names def _parse_asm_definition(self, token: Token) -> None: if self._eof(): raise ParseError(f"definition name missing after ':asm' at {token.line}:{token.column}") name_token = self._consume() effect_names: Optional[List[str]] = None if not self._eof(): next_token = self.peek_token() if next_token is not None and next_token.lexeme == "(": effect_names = self._parse_effect_annotations() brace_token = self._consume() if brace_token.lexeme != "{": raise ParseError(f"expected '{{' after asm name at {brace_token.line}:{brace_token.column}") block_start = brace_token.end block_end: Optional[int] = None while not self._eof(): next_token = self._consume() if next_token.lexeme == "}": block_end = next_token.start break if block_end is None: raise ParseError("missing '}' to terminate asm body") asm_body = self.source[block_start:block_end] definition = AsmDefinition(name=name_token.lexeme, body=asm_body) if effect_names is not None: definition.effects = set(effect_names) word = self.dictionary.lookup(definition.name) if word is None: word = Word(name=definition.name) self.dictionary.register(word) word.definition = definition definition.immediate = word.immediate definition.compile_only = word.compile_only module = self.context_stack[-1] if not isinstance(module, Module): raise ParseError("asm definitions must be top-level forms") module.forms.append(definition) self.last_defined = word if self._eof(): raise ParseError("asm definition missing terminator ';'") terminator = self._consume() if terminator.lexeme != ";": raise ParseError(f"expected ';' after asm definition at {terminator.line}:{terminator.column}") def _parse_py_definition(self, token: Token) -> None: if self._eof(): raise ParseError(f"definition name missing after ':py' at {token.line}:{token.column}") name_token = self._consume() brace_token = self._consume() if brace_token.lexeme != "{": raise ParseError(f"expected '{{' after py name at {brace_token.line}:{brace_token.column}") block_start = brace_token.end block_end: Optional[int] = None while not self._eof(): next_token = self._consume() if next_token.lexeme == "}": block_end = next_token.start break if block_end is None: raise ParseError("missing '}' to terminate py body") py_body = textwrap.dedent(self.source[block_start:block_end]) word = self.dictionary.lookup(name_token.lexeme) if word is None: word = Word(name=name_token.lexeme) namespace = self._py_exec_namespace() try: exec(py_body, namespace) except Exception as exc: # pragma: no cover - user code raise ParseError(f"python macro body for '{word.name}' raised: {exc}") from exc macro_fn = namespace.get("macro") intrinsic_fn = namespace.get("intrinsic") if macro_fn is None and intrinsic_fn is None: raise ParseError("python definition must define 'macro' or 'intrinsic'") if macro_fn is not None: word.macro = macro_fn word.immediate = True if intrinsic_fn is not None: word.intrinsic = intrinsic_fn self.dictionary.register(word) if self._eof(): raise ParseError("py definition missing terminator ';'") terminator = self._consume() if terminator.lexeme != ";": raise ParseError(f"expected ';' after py definition at {terminator.line}:{terminator.column}") def _py_exec_namespace(self) -> Dict[str, Any]: return dict(PY_EXEC_GLOBALS) def _append_op(self, node: Op, token: Optional[Token] = None) -> None: if node.loc is None: tok = token or self._last_token if tok is not None: node.loc = self.location_for_token(tok) target = self.context_stack[-1] if isinstance(target, Module): target.forms.append(node) elif isinstance(target, Definition): target.body.append(node) else: # pragma: no cover - defensive raise ParseError("unknown parse context") def _try_literal(self, token: Token) -> bool: try: value = int(token.lexeme, 0) self._append_op(Op(op="literal", data=value)) return True except ValueError: pass # Try float try: if "." in token.lexeme or "e" in token.lexeme.lower(): value = float(token.lexeme) self._append_op(Op(op="literal", data=value)) return True except ValueError: pass string_value = _parse_string_literal(token) if string_value is not None: self._append_op(Op(op="literal", data=string_value)) return True return False def _consume(self) -> Token: self._ensure_tokens(self.pos) if self._eof(): raise ParseError("unexpected EOF") token = self.tokens[self.pos] self.pos += 1 return token def _eof(self) -> bool: self._ensure_tokens(self.pos) return self.pos >= len(self.tokens) def _ensure_tokens(self, upto: int) -> None: if self._token_iter_exhausted: return if self._token_iter is None: self._token_iter_exhausted = True return while len(self.tokens) <= upto and not self._token_iter_exhausted: try: next_tok = next(self._token_iter) except StopIteration: self._token_iter_exhausted = True break self.tokens.append(next_tok) class CompileTimeVM: def __init__(self, parser: Parser) -> None: self.parser = parser self.dictionary = parser.dictionary self.stack: List[Any] = [] self.return_stack: List[Any] = [] self.loop_stack: List[Dict[str, Any]] = [] self._handles = _CTHandleTable() self.call_stack: List[str] = [] def reset(self) -> None: self.stack.clear() self.return_stack.clear() self.loop_stack.clear() self._handles.clear() self.call_stack.clear() def push(self, value: Any) -> None: self.stack.append(value) def pop(self) -> Any: if not self.stack: raise ParseError("compile-time stack underflow") return self.stack.pop() def _resolve_handle(self, value: Any) -> Any: if isinstance(value, int): for delta in (0, -1, 1): candidate = value + delta if candidate in self._handles.objects: obj = self._handles.objects[candidate] self._handles.objects[value] = obj return obj # Occasionally a raw object id can appear on the stack; recover it if we still # hold the object reference. for obj in self._handles.objects.values(): if id(obj) == value: self._handles.objects[value] = obj return obj return value def peek(self) -> Any: if not self.stack: raise ParseError("compile-time stack underflow") return self.stack[-1] def pop_int(self) -> int: value = self.pop() if not isinstance(value, int): raise ParseError("expected integer on compile-time stack") return value def pop_str(self) -> str: value = self._resolve_handle(self.pop()) if not isinstance(value, str): raise ParseError("expected string on compile-time stack") return value def pop_list(self) -> List[Any]: value = self._resolve_handle(self.pop()) if not isinstance(value, list): known = value in self._handles.objects if isinstance(value, int) else False handles_size = len(self._handles.objects) handle_keys = list(self._handles.objects.keys()) raise ParseError( f"expected list on compile-time stack, got {type(value).__name__} value={value!r} known_handle={known} handles={handles_size}:{handle_keys!r} stack={self.stack!r}" ) return value def pop_token(self) -> Token: value = self._resolve_handle(self.pop()) if not isinstance(value, Token): raise ParseError("expected token on compile-time stack") return value def invoke(self, word: Word) -> None: self.reset() self._call_word(word) def invoke_with_args(self, word: Word, args: Sequence[Any]) -> None: self.reset() for value in args: self.push(value) self._call_word(word) def _call_word(self, word: Word) -> None: self.call_stack.append(word.name) try: definition = word.definition prefer_definition = word.compile_time_override or (isinstance(definition, Definition) and (word.immediate or word.compile_only)) if not prefer_definition and word.compile_time_intrinsic is not None: word.compile_time_intrinsic(self) return if definition is None: raise ParseError(f"word '{word.name}' has no compile-time definition") if isinstance(definition, AsmDefinition): self._run_asm_definition(word) return self._execute_nodes(definition.body) except CompileTimeError: raise except ParseError as exc: raise CompileTimeError(f"{exc}\ncompile-time stack: {' -> '.join(self.call_stack)}") from None except Exception as exc: raise CompileTimeError( f"compile-time failure in '{word.name}': {exc}\ncompile-time stack: {' -> '.join(self.call_stack)}" ) from None finally: self.call_stack.pop() def _run_asm_definition(self, word: Word) -> None: definition = word.definition if Ks is None: raise ParseError("keystone is required for compile-time :asm execution; install keystone-engine") if not isinstance(definition, AsmDefinition): # pragma: no cover - defensive raise ParseError(f"word '{word.name}' has no asm body") asm_body = definition.body.strip("\n") # Determine whether this asm expects string semantics via declared effects. string_mode = WORD_EFFECT_STRING_IO in definition.effects handles = self._handles non_int_data = any(not isinstance(v, int) for v in self.stack) non_int_return = any(not isinstance(v, int) for v in self.return_stack) # Collect all strings present on data and return stacks so we can point # puts() at a real buffer and pass its range check (data_start..data_end). strings: List[str] = [] if string_mode: for v in self.stack + self.return_stack: if isinstance(v, str): strings.append(v) data_blob = b"" string_addrs: Dict[str, Tuple[int, int]] = {} if strings: offset = 0 parts: List[bytes] = [] seen: Dict[str, Tuple[int, int]] = {} for s in strings: if s in seen: string_addrs[s] = seen[s] continue encoded = s.encode("utf-8") + b"\x00" parts.append(encoded) addr = offset length = len(encoded) - 1 seen[s] = (addr, length) string_addrs[s] = (addr, length) offset += len(encoded) data_blob = b"".join(parts) string_buffer: Optional[ctypes.Array[Any]] = None data_start = 0 data_end = 0 if data_blob: string_buffer = ctypes.create_string_buffer(data_blob) data_start = ctypes.addressof(string_buffer) data_end = data_start + len(data_blob) handles.refs.append(string_buffer) for s, (off, _len) in string_addrs.items(): handles.objects[data_start + off] = s PRINT_BUF_BYTES = 128 print_buffer = ctypes.create_string_buffer(PRINT_BUF_BYTES) handles.refs.append(print_buffer) print_buf = ctypes.addressof(print_buffer) wrapper_lines = [] wrapper_lines.extend([ "_ct_entry:", " push rbx", " push r12", " push r13", " push r14", " push r15", " mov r12, rdi", # data stack pointer " mov r13, rsi", # return stack pointer " mov r14, rdx", # out ptr for r12 " mov r15, rcx", # out ptr for r13 ]) if asm_body: patched_body = [] for line in asm_body.splitlines(): line = line.strip() if line == "ret": line = "jmp _ct_save" if "lea r8, [rel data_start]" in line: line = line.replace("lea r8, [rel data_start]", f"mov r8, {data_start}") if "lea r9, [rel data_end]" in line: line = line.replace("lea r9, [rel data_end]", f"mov r9, {data_end}") if "mov byte [rel print_buf]" in line or "mov byte ptr [rel print_buf]" in line: patched_body.append(f"mov rax, {print_buf}") patched_body.append("mov byte ptr [rax], 10") continue if "lea rsi, [rel print_buf_end]" in line: line = f"mov rsi, {print_buf + PRINT_BUF_BYTES}" if "lea rsi, [rel print_buf]" in line: line = f"mov rsi, {print_buf}" patched_body.append(line) wrapper_lines.extend(patched_body) wrapper_lines.extend([ "_ct_save:", " mov [r14], r12", " mov [r15], r13", " pop r15", " pop r14", " pop r13", " pop r12", " pop rbx", " ret", ]) def _normalize_sizes(line: str) -> str: for size in ("qword", "dword", "word", "byte"): line = line.replace(f"{size} [", f"{size} ptr [") return line def _strip_comment(line: str) -> str: return line.split(";", 1)[0].rstrip() normalized_lines = [] for raw in wrapper_lines: stripped = _strip_comment(raw) if not stripped.strip(): continue normalized_lines.append(_normalize_sizes(stripped)) ks = Ks(KS_ARCH_X86, KS_MODE_64) try: encoding, _ = ks.asm("\n".join(normalized_lines)) except KsError as exc: debug_lines = "\n".join(normalized_lines) raise ParseError( f"keystone failed for word '{word.name}': {exc}\n--- asm ---\n{debug_lines}\n--- end asm ---" ) from exc if encoding is None: raise ParseError( f"keystone produced no code for word '{word.name}' (lines: {len(wrapper_lines)})" ) code = bytes(encoding) code_buf = mmap.mmap(-1, len(code), prot=mmap.PROT_READ | mmap.PROT_WRITE | mmap.PROT_EXEC) code_buf.write(code) code_ptr = ctypes.addressof(ctypes.c_char.from_buffer(code_buf)) func_type = ctypes.CFUNCTYPE(None, ctypes.c_uint64, ctypes.c_uint64, ctypes.c_uint64, ctypes.c_uint64) func = func_type(code_ptr) handles = self._handles def _marshal_stack(py_stack: List[Any]) -> Tuple[int, int, int, Any]: capacity = len(py_stack) + 16 buffer = (ctypes.c_int64 * capacity)() base = ctypes.addressof(buffer) top = base + capacity * 8 sp = top for value in py_stack: sp -= 8 if isinstance(value, int): ctypes.c_int64.from_address(sp).value = value elif isinstance(value, str): if string_mode: offset, strlen = string_addrs.get(value, (0, 0)) addr = data_start + offset if data_start else handles.store(value) # puts expects (len, addr) with len on top ctypes.c_int64.from_address(sp).value = addr sp -= 8 ctypes.c_int64.from_address(sp).value = strlen else: ctypes.c_int64.from_address(sp).value = handles.store(value) else: ctypes.c_int64.from_address(sp).value = handles.store(value) return sp, top, base, buffer # r12/r13 must point at the top element (or top of buffer if empty) buffers: List[Any] = [] d_sp, d_top, d_base, d_buf = _marshal_stack(self.stack) buffers.append(d_buf) r_sp, r_top, r_base, r_buf = _marshal_stack(self.return_stack) buffers.append(r_buf) out_d = ctypes.c_uint64(0) out_r = ctypes.c_uint64(0) func(d_sp, r_sp, ctypes.addressof(out_d), ctypes.addressof(out_r)) new_d = out_d.value new_r = out_r.value if not (d_base <= new_d <= d_top): raise ParseError(f"compile-time asm '{word.name}' corrupted data stack pointer") if not (r_base <= new_r <= r_top): raise ParseError(f"compile-time asm '{word.name}' corrupted return stack pointer") def _unmarshal_stack(sp: int, top: int, table: _CTHandleTable) -> List[Any]: if sp == top: return [] values: List[Any] = [] addr = top - 8 while addr >= sp: raw = ctypes.c_int64.from_address(addr).value if raw in table.objects: obj = table.objects[raw] if isinstance(obj, str) and values and isinstance(values[-1], int): # collapse (len, addr) pairs back into the original string values.pop() values.append(obj) else: values.append(obj) else: values.append(raw) addr -= 8 return values self.stack = _unmarshal_stack(new_d, d_top, handles) self.return_stack = _unmarshal_stack(new_r, r_top, handles) def _call_word_by_name(self, name: str) -> None: word = self.dictionary.lookup(name) if word is None: raise ParseError(f"unknown word '{name}' during compile-time execution") self._call_word(word) def _execute_nodes(self, nodes: Sequence[Op]) -> None: label_positions = self._label_positions(nodes) loop_pairs = self._for_pairs(nodes) begin_pairs = self._begin_pairs(nodes) self.loop_stack = [] begin_stack: List[Dict[str, int]] = [] ip = 0 while ip < len(nodes): node = nodes[ip] kind = node.op data = node.data if kind == "literal": self.push(data) ip += 1 continue if kind == "word": name = str(data) if name == "begin": end_idx = begin_pairs.get(ip) if end_idx is None: raise ParseError("'begin' without matching 'again'") begin_stack.append({"begin": ip, "end": end_idx}) ip += 1 continue if name == "again": if not begin_stack or begin_stack[-1]["end"] != ip: raise ParseError("'again' without matching 'begin'") ip = begin_stack[-1]["begin"] + 1 continue if name == "continue": if not begin_stack: raise ParseError("'continue' outside begin/again loop") ip = begin_stack[-1]["begin"] + 1 continue if name == "exit": if begin_stack: frame = begin_stack.pop() ip = frame["end"] + 1 continue return self._call_word_by_name(name) ip += 1 continue if kind == "branch_zero": condition = self.pop() if isinstance(condition, bool): flag = condition elif isinstance(condition, int): flag = condition != 0 else: raise ParseError("branch expects integer or boolean condition") if not flag: ip = self._jump_to_label(label_positions, str(data)) else: ip += 1 continue if kind == "jump": ip = self._jump_to_label(label_positions, str(data)) continue if kind == "label": ip += 1 continue if kind == "for_begin": count = self.pop_int() if count <= 0: match = loop_pairs.get(ip) if match is None: raise ParseError("internal loop bookkeeping error") ip = match + 1 continue self.loop_stack.append({"remaining": count, "begin": ip, "initial": count}) ip += 1 continue if kind == "for_end": if not self.loop_stack: raise ParseError("'next' without matching 'for'") frame = self.loop_stack[-1] frame["remaining"] -= 1 if frame["remaining"] > 0: ip = frame["begin"] + 1 continue self.loop_stack.pop() ip += 1 continue raise ParseError(f"unsupported compile-time op {node!r}") def _label_positions(self, nodes: Sequence[Op]) -> Dict[str, int]: positions: Dict[str, int] = {} for idx, node in enumerate(nodes): if node.op == "label": positions[str(node.data)] = idx return positions def _for_pairs(self, nodes: Sequence[Op]) -> Dict[int, int]: stack: List[int] = [] pairs: Dict[int, int] = {} for idx, node in enumerate(nodes): if node.op == "for_begin": stack.append(idx) elif node.op == "for_end": if not stack: raise ParseError("'next' without matching 'for'") begin_idx = stack.pop() pairs[begin_idx] = idx pairs[idx] = begin_idx if stack: raise ParseError("'for' without matching 'next'") return pairs def _begin_pairs(self, nodes: Sequence[Op]) -> Dict[int, int]: stack: List[int] = [] pairs: Dict[int, int] = {} for idx, node in enumerate(nodes): if node.op == "word" and node.data == "begin": stack.append(idx) elif node.op == "word" and node.data == "again": if not stack: raise ParseError("'again' without matching 'begin'") begin_idx = stack.pop() pairs[begin_idx] = idx pairs[idx] = begin_idx if stack: raise ParseError("'begin' without matching 'again'") return pairs def _jump_to_label(self, labels: Dict[str, int], target: str) -> int: if target not in labels: raise ParseError(f"unknown label '{target}' during compile-time execution") return labels[target] # --------------------------------------------------------------------------- # NASM Emitter # --------------------------------------------------------------------------- @dataclass class Emission: text: List[str] = field(default_factory=list) data: List[str] = field(default_factory=list) bss: List[str] = field(default_factory=list) def snapshot(self) -> str: parts: List[str] = [] if self.text: parts.extend(["section .text", *self.text]) if self.data: parts.extend(["section .data", *self.data]) if self.bss: parts.extend(["section .bss", *self.bss]) return "\n".join(parts) class FunctionEmitter: """Utility for emitting per-word assembly.""" def __init__(self, text: List[str], debug_enabled: bool = False) -> None: self.text = text self.debug_enabled = debug_enabled self._current_loc: Optional[SourceLocation] = None self._generated_debug_path = "" def _emit_line_directive(self, line: int, path: str, increment: int) -> None: escaped = path.replace("\\", "\\\\").replace('"', '\\"') self.text.append(f'%line {line}+{increment} "{escaped}"') def set_location(self, loc: Optional[SourceLocation]) -> None: if not self.debug_enabled: return if loc is None: if self._current_loc is None: return self._emit_line_directive(1, self._generated_debug_path, increment=1) self._current_loc = None return if self._current_loc == loc: return self._emit_line_directive(loc.line, str(loc.path), increment=0) self._current_loc = loc def emit(self, line: str) -> None: self.text.append(line) def comment(self, message: str) -> None: self.text.append(f" ; {message}") def push_literal(self, value: int) -> None: self.text.extend([ f" ; push {value}", " sub r12, 8", f" mov qword [r12], {value}", ]) def push_float(self, label: str) -> None: self.text.extend([ f" ; push float from {label}", " sub r12, 8", f" mov rax, [rel {label}]", " mov [r12], rax", ]) def push_label(self, label: str) -> None: self.text.extend([ f" ; push {label}", " sub r12, 8", f" mov qword [r12], {label}", ]) def push_from(self, register: str) -> None: self.text.extend([ " sub r12, 8", f" mov [r12], {register}", ]) def pop_to(self, register: str) -> None: self.text.extend([ f" mov {register}, [r12]", " add r12, 8", ]) def sanitize_label(name: str) -> str: parts: List[str] = [] for ch in name: if ch.isalnum() or ch == "_": parts.append(ch) else: parts.append(f"_{ord(ch):02x}") safe = "".join(parts) or "anon" return f"word_{safe}" def _is_identifier(text: str) -> bool: if not text: return False first = text[0] if not (first.isalpha() or first == "_"): return False return all(ch.isalnum() or ch == "_" for ch in text) _C_TYPE_IGNORED_QUALIFIERS = { "const", "volatile", "register", "restrict", "static", "extern", "_Atomic", } def _split_trailing_identifier(text: str) -> Tuple[str, Optional[str]]: if not text: return text, None idx = len(text) while idx > 0 and (text[idx - 1].isalnum() or text[idx - 1] == "_"): idx -= 1 if idx == 0 or idx == len(text): return text, None prefix = text[:idx] suffix = text[idx:] if any(not ch.isalnum() and ch != "_" for ch in prefix): return prefix, suffix return text, None def _normalize_c_type_tokens(tokens: Sequence[str], *, allow_default: bool) -> str: pointer_count = 0 parts: List[str] = [] for raw in tokens: text = raw.strip() if not text: continue if set(text) == {"*"}: pointer_count += len(text) continue while text.startswith("*"): pointer_count += 1 text = text[1:] while text.endswith("*"): pointer_count += 1 text = text[:-1] if not text: continue if text in _C_TYPE_IGNORED_QUALIFIERS: continue parts.append(text) if not parts: if allow_default: base = "int" else: raise ParseError("expected C type before parameter name") else: base = " ".join(parts) return base + ("*" * pointer_count) def _ctype_uses_sse(type_name: Optional[str]) -> bool: if type_name is None: return False base = type_name.rstrip("*") return base in {"float", "double"} def _parse_string_literal(token: Token) -> Optional[str]: text = token.lexeme if len(text) < 2 or text[0] != '"' or text[-1] != '"': return None body = text[1:-1] result: List[str] = [] idx = 0 while idx < len(body): char = body[idx] if char != "\\": result.append(char) idx += 1 continue idx += 1 if idx >= len(body): raise ParseError( f"unterminated escape sequence in string literal at {token.line}:{token.column}" ) escape = body[idx] idx += 1 if escape == 'n': result.append("\n") elif escape == 't': result.append("\t") elif escape == 'r': result.append("\r") elif escape == '0': result.append("\0") elif escape == '"': result.append('"') elif escape == "\\": result.append("\\") else: raise ParseError( f"unsupported escape sequence '\\{escape}' in string literal at {token.line}:{token.column}" ) return "".join(result) class _CTHandleTable: """Keeps Python object references stable across compile-time asm calls.""" def __init__(self) -> None: self.objects: Dict[int, Any] = {} self.refs: List[Any] = [] self.string_buffers: List[ctypes.Array[Any]] = [] def clear(self) -> None: self.objects.clear() self.refs.clear() self.string_buffers.clear() def store(self, value: Any) -> int: addr = id(value) self.refs.append(value) self.objects[addr] = value return addr class Assembler: def __init__(self, dictionary: Dictionary) -> None: self.dictionary = dictionary self._string_literals: Dict[str, Tuple[str, int]] = {} self._float_literals: Dict[float, str] = {} self._data_section: Optional[List[str]] = None self._inline_stack: List[str] = [] self._inline_counter: int = 0 self._emit_stack: List[str] = [] def _reachable_runtime_defs(self, runtime_defs: Sequence[Union[Definition, AsmDefinition]]) -> Set[str]: edges: Dict[str, Set[str]] = {} for definition in runtime_defs: refs: Set[str] = set() if isinstance(definition, Definition): for node in definition.body: if node.op == "word": refs.add(str(node.data)) edges[definition.name] = refs reachable: Set[str] = set() stack: List[str] = ["main"] while stack: name = stack.pop() if name in reachable: continue reachable.add(name) for dep in edges.get(name, ()): if dep not in reachable and dep in edges: stack.append(dep) return reachable def _emit_externs(self, text: List[str]) -> None: externs = sorted([w.name for w in self.dictionary.words.values() if getattr(w, "is_extern", False)]) for name in externs: text.append(f"extern {name}") def emit(self, module: Module, debug: bool = False) -> Emission: emission = Emission() self._emit_externs(emission.text) prelude_lines = module.prelude if module.prelude is not None else self._runtime_prelude() emission.text.extend(prelude_lines) self._string_literals = {} self._float_literals = {} self._data_section = emission.data valid_defs = (Definition, AsmDefinition) raw_defs = [form for form in module.forms if isinstance(form, valid_defs)] definitions = self._dedup_definitions(raw_defs) stray_forms = [form for form in module.forms if not isinstance(form, valid_defs)] if stray_forms: raise CompileError("top-level literals or word references are not supported yet") runtime_defs = [ defn for defn in definitions if not getattr(defn, "compile_only", False) ] if not any(defn.name == "main" for defn in runtime_defs): raise CompileError("missing 'main' definition") reachable = self._reachable_runtime_defs(runtime_defs) if len(reachable) != len(runtime_defs): runtime_defs = [defn for defn in runtime_defs if defn.name in reachable] # Inline-only definitions are expanded at call sites; skip emitting standalone labels. runtime_defs = [defn for defn in runtime_defs if not getattr(defn, "inline", False)] for definition in runtime_defs: self._emit_definition(definition, emission.text, debug=debug) self._emit_variables(module.variables) if self._data_section is not None: if not self._data_section: self._data_section.append("data_start:") if not self._data_section or self._data_section[-1] != "data_end:": self._data_section.append("data_end:") bss_lines = module.bss if module.bss is not None else self._bss_layout() emission.bss.extend(bss_lines) self._data_section = None return emission def _dedup_definitions(self, definitions: Sequence[Union[Definition, AsmDefinition]]) -> List[Union[Definition, AsmDefinition]]: seen: Set[str] = set() ordered: List[Union[Definition, AsmDefinition]] = [] for defn in reversed(definitions): if defn.name in seen: continue seen.add(defn.name) ordered.append(defn) ordered.reverse() return ordered def _emit_variables(self, variables: Dict[str, str]) -> None: if not variables: return self._ensure_data_start() existing = set() if self._data_section is not None: for line in self._data_section: if ":" in line: label = line.split(":", 1)[0] existing.add(label.strip()) for label in variables.values(): if label in existing: continue self._data_section.append(f"{label}: dq 0") def _ensure_data_start(self) -> None: if self._data_section is None: raise CompileError("data section is not initialized") if not self._data_section: self._data_section.append("data_start:") def _intern_string_literal(self, value: str) -> Tuple[str, int]: if self._data_section is None: raise CompileError("string literal emission requested without data section") self._ensure_data_start() if value in self._string_literals: return self._string_literals[value] label = f"str_{len(self._string_literals)}" encoded = value.encode("utf-8") bytes_with_nul = list(encoded) + [0] byte_list = ", ".join(str(b) for b in bytes_with_nul) self._data_section.append(f"{label}: db {byte_list}") self._data_section.append(f"{label}_len equ {len(encoded)}") self._string_literals[value] = (label, len(encoded)) return self._string_literals[value] def _intern_float_literal(self, value: float) -> str: if self._data_section is None: raise CompileError("float literal emission requested without data section") self._ensure_data_start() if value in self._float_literals: return self._float_literals[value] label = f"flt_{len(self._float_literals)}" # Use hex representation of double precision float import struct hex_val = struct.pack('>d', value).hex() # NASM expects hex starting with 0x self._data_section.append(f"{label}: dq 0x{hex_val}") self._float_literals[value] = label return label def _emit_definition( self, definition: Union[Definition, AsmDefinition], text: List[str], *, debug: bool = False, ) -> None: label = sanitize_label(definition.name) text.append(f"{label}:") builder = FunctionEmitter(text, debug_enabled=debug) self._emit_stack.append(definition.name) try: if isinstance(definition, Definition): for node in definition.body: self._emit_node(node, builder) elif isinstance(definition, AsmDefinition): self._emit_asm_body(definition, builder) else: # pragma: no cover - defensive raise CompileError("unknown definition type") builder.emit(" ret") finally: self._emit_stack.pop() def _emit_inline_definition(self, word: Word, builder: FunctionEmitter) -> None: definition = word.definition if not isinstance(definition, Definition): raise CompileError(f"inline word '{word.name}' requires a high-level definition") self._emit_stack.append(f"{word.name} (inline)") suffix = self._inline_counter self._inline_counter += 1 label_map: Dict[str, str] = {} def remap(label: str) -> str: if label not in label_map: label_map[label] = f"{label}__inl{suffix}" return label_map[label] for node in definition.body: kind = node.op data = node.data if kind == "label": mapped = remap(str(data)) self._emit_node(Op(op="label", data=mapped), builder) continue if kind == "jump": mapped = remap(str(data)) self._emit_node(Op(op="jump", data=mapped), builder) continue if kind == "branch_zero": mapped = remap(str(data)) self._emit_node(Op(op="branch_zero", data=mapped), builder) continue if kind == "for_begin": mapped = { "loop": remap(data["loop"]), "end": remap(data["end"]), } self._emit_node(Op(op="for_begin", data=mapped), builder) continue if kind == "for_end": mapped = { "loop": remap(data["loop"]), "end": remap(data["end"]), } self._emit_node(Op(op="for_end", data=mapped), builder) continue if kind in ("list_begin", "list_end"): mapped = remap(str(data)) self._emit_node(Op(op=kind, data=mapped), builder) continue self._emit_node(node, builder) self._emit_stack.pop() def _emit_asm_body(self, definition: AsmDefinition, builder: FunctionEmitter) -> None: body = definition.body.strip("\n") if not body: return for line in body.splitlines(): if line.strip(): builder.emit(line) else: builder.emit("") def _emit_node(self, node: Op, builder: FunctionEmitter) -> None: kind = node.op data = node.data builder.set_location(node.loc) def ctx() -> str: return f" while emitting '{self._emit_stack[-1]}'" if self._emit_stack else "" if kind == "literal": if isinstance(data, int): builder.push_literal(data) return if isinstance(data, float): label = self._intern_float_literal(data) builder.push_float(label) return if isinstance(data, str): label, length = self._intern_string_literal(data) builder.push_label(label) builder.push_literal(length) return raise CompileError(f"unsupported literal type {type(data)!r}{ctx()}") if kind == "word": self._emit_wordref(str(data), builder) return if kind == "branch_zero": self._emit_branch_zero(str(data), builder) return if kind == "jump": builder.emit(f" jmp {data}") return if kind == "label": builder.emit(f"{data}:") return if kind == "for_begin": self._emit_for_begin(data, builder) return if kind == "for_end": self._emit_for_next(data, builder) return if kind == "list_begin": builder.comment("list begin") builder.emit(" mov rax, [rel list_capture_sp]") builder.emit(" lea rdx, [rel list_capture_stack]") builder.emit(" mov [rdx + rax*8], r12") builder.emit(" inc rax") builder.emit(" mov [rel list_capture_sp], rax") return if kind == "list_end": base = str(data) loop_label = f"{base}_copy_loop" done_label = f"{base}_copy_done" builder.comment("list end") # pop capture start pointer builder.emit(" mov rax, [rel list_capture_sp]") builder.emit(" dec rax") builder.emit(" mov [rel list_capture_sp], rax") builder.emit(" lea r11, [rel list_capture_stack]") builder.emit(" mov rbx, [r11 + rax*8]") # count = (start_r12 - r12) / 8 builder.emit(" mov rcx, rbx") builder.emit(" sub rcx, r12") builder.emit(" shr rcx, 3") builder.emit(" mov [rel list_capture_tmp], rcx") # bytes = (count + 1) * 8 builder.emit(" mov rsi, rcx") builder.emit(" inc rsi") builder.emit(" shl rsi, 3") # mmap(NULL, bytes, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0) builder.emit(" xor rdi, rdi") builder.emit(" mov rdx, 3") builder.emit(" mov r10, 34") builder.emit(" mov r8, -1") builder.emit(" xor r9, r9") builder.emit(" mov rax, 9") builder.emit(" syscall") # store length builder.emit(" mov rdx, [rel list_capture_tmp]") builder.emit(" mov [rax], rdx") # copy elements, preserving original push order builder.emit(" xor rcx, rcx") builder.emit(f"{loop_label}:") builder.emit(" cmp rcx, rdx") builder.emit(f" je {done_label}") builder.emit(" mov r8, rdx") builder.emit(" dec r8") builder.emit(" sub r8, rcx") builder.emit(" shl r8, 3") builder.emit(" mov r9, [r12 + r8]") builder.emit(" mov [rax + 8 + rcx*8], r9") builder.emit(" inc rcx") builder.emit(f" jmp {loop_label}") builder.emit(f"{done_label}:") # drop captured values and push list pointer builder.emit(" mov r12, rbx") builder.emit(" sub r12, 8") builder.emit(" mov [r12], rax") return raise CompileError(f"unsupported op {node!r}{ctx()}") def _emit_wordref(self, name: str, builder: FunctionEmitter) -> None: word = self.dictionary.lookup(name) if word is None: suffix = f" while emitting '{self._emit_stack[-1]}'" if self._emit_stack else "" raise CompileError(f"unknown word '{name}'{suffix}") if word.compile_only: suffix = f" while emitting '{self._emit_stack[-1]}'" if self._emit_stack else "" raise CompileError(f"word '{name}' is compile-time only{suffix}") if getattr(word, "inline", False) and isinstance(word.definition, Definition): if word.name in self._inline_stack: suffix = f" while emitting '{self._emit_stack[-1]}'" if self._emit_stack else "" raise CompileError(f"recursive inline expansion for '{word.name}'{suffix}") self._inline_stack.append(word.name) self._emit_inline_definition(word, builder) self._inline_stack.pop() return if word.intrinsic: word.intrinsic(builder) return if getattr(word, "is_extern", False): inputs = getattr(word, "extern_inputs", 0) outputs = getattr(word, "extern_outputs", 0) signature = getattr(word, "extern_signature", None) if signature is not None or inputs > 0 or outputs > 0: regs = ["rdi", "rsi", "rdx", "rcx", "r8", "r9"] xmm_regs = [f"xmm{i}" for i in range(8)] arg_types = signature[0] if signature else [] ret_type = signature[1] if signature else None if len(arg_types) != inputs and signature: suffix = f" while emitting '{self._emit_stack[-1]}'" if self._emit_stack else "" raise CompileError(f"extern '{name}' mismatch: {inputs} inputs vs {len(arg_types)} types{suffix}") int_idx = 0 xmm_idx = 0 mapping: List[Tuple[str, str]] = [] # (type, target_reg) if not arg_types: # Legacy/Raw mode: assume all ints if inputs > 6: raise CompileError(f"extern '{name}' has too many inputs ({inputs} > 6)") for i in range(inputs): mapping.append(("int", regs[i])) else: for type_name in arg_types: if type_name in ("float", "double"): if xmm_idx >= 8: raise CompileError(f"extern '{name}' has too many float inputs") mapping.append(("float", xmm_regs[xmm_idx])) xmm_idx += 1 else: if int_idx >= 6: raise CompileError(f"extern '{name}' has too many int inputs") mapping.append(("int", regs[int_idx])) int_idx += 1 for type_name, reg in reversed(mapping): if type_name == "float": builder.pop_to("rax") builder.emit(f" movq {reg}, rax") else: builder.pop_to(reg) builder.emit(" push rbp") builder.emit(" mov rbp, rsp") builder.emit(" and rsp, -16") builder.emit(f" mov al, {xmm_idx}") builder.emit(f" call {name}") builder.emit(" leave") # Handle Return Value if _ctype_uses_sse(ret_type): # Result in xmm0, move to stack builder.emit(" sub r12, 8") builder.emit(" movq rax, xmm0") builder.emit(" mov [r12], rax") elif outputs == 1: builder.push_from("rax") elif outputs > 1: raise CompileError("extern only supports 0 or 1 output") else: # Emit call to unresolved symbol (let linker resolve it) builder.emit(f" call {name}") else: builder.emit(f" call {sanitize_label(name)}") def _emit_branch_zero(self, target: str, builder: FunctionEmitter) -> None: builder.pop_to("rax") builder.emit(" test rax, rax") builder.emit(f" jz {target}") def _emit_for_begin(self, data: Dict[str, str], builder: FunctionEmitter) -> None: loop_label = data["loop"] end_label = data["end"] builder.pop_to("rax") builder.emit(" cmp rax, 0") builder.emit(f" jle {end_label}") builder.emit(" sub r13, 8") builder.emit(" mov [r13], rax") builder.emit(f"{loop_label}:") def _emit_for_next(self, data: Dict[str, str], builder: FunctionEmitter) -> None: loop_label = data["loop"] end_label = data["end"] builder.emit(" mov rax, [r13]") builder.emit(" dec rax") builder.emit(" mov [r13], rax") builder.emit(f" jg {loop_label}") builder.emit(" add r13, 8") builder.emit(f"{end_label}:") def _runtime_prelude(self) -> List[str]: return [ "%define DSTK_BYTES 65536", "%define RSTK_BYTES 65536", "%define PRINT_BUF_BYTES 128", "global _start", "global argc", "global argv", "section .data", "argc: dq 0", "argv: dq 0", "section .text", "_start:", " ; Linux x86-64 startup: argc/argv from stack", " mov rdi, [rsp]", # argc " lea rsi, [rsp+8]", # argv " mov [rel argc], rdi", " mov [rel argv], rsi", " ; initialize data/return stack pointers", " lea r12, [rel dstack_top]", " mov r15, r12", " lea r13, [rel rstack_top]", " call word_main", " mov rax, 0", " cmp r12, r15", " je .no_exit_value", " mov rax, [r12]", " add r12, 8", ".no_exit_value:", " mov rdi, rax", " mov rax, 60", " syscall", ] def _bss_layout(self) -> List[str]: return [ "align 16", "dstack: resb DSTK_BYTES", "dstack_top:", "align 16", "rstack: resb RSTK_BYTES", "rstack_top:", "align 16", "print_buf: resb PRINT_BUF_BYTES", "print_buf_end:", "align 16", "persistent: resb 64", "align 16", "list_capture_sp: resq 1", "list_capture_tmp: resq 1", "list_capture_stack: resq 1024", ] def write_asm(self, emission: Emission, path: Path) -> None: path.write_text(emission.snapshot()) # --------------------------------------------------------------------------- # Built-in macros and intrinsics # --------------------------------------------------------------------------- def macro_immediate(ctx: MacroContext) -> Optional[List[Op]]: parser = ctx.parser word = parser.most_recent_definition() if word is None: raise ParseError("'immediate' must follow a definition") word.immediate = True if word.definition is not None: word.definition.immediate = True return None def macro_compile_only(ctx: MacroContext) -> Optional[List[Op]]: parser = ctx.parser word = parser.most_recent_definition() if word is None: raise ParseError("'compile-only' must follow a definition") word.compile_only = True if word.definition is not None: word.definition.compile_only = True return None def macro_inline(ctx: MacroContext) -> Optional[List[Op]]: parser = ctx.parser next_tok = parser.peek_token() if next_tok is None or next_tok.lexeme != "word": raise ParseError("'inline' must be followed by 'word'") if parser._pending_inline_definition: raise ParseError("duplicate 'inline' before 'word'") parser._pending_inline_definition = True return None def _require_definition_context(parser: "Parser", word_name: str) -> Definition: if not parser.context_stack or not isinstance(parser.context_stack[-1], Definition): raise ParseError(f"'{word_name}' can only appear inside a definition") return parser.context_stack[-1] def macro_label(ctx: MacroContext) -> Optional[List[Op]]: parser = ctx.parser if parser._eof(): raise ParseError("label name missing after 'label'") tok = parser.next_token() name = tok.lexeme if not _is_identifier(name): raise ParseError(f"invalid label name '{name}'") definition = _require_definition_context(parser, "label") if any(node.op == "label" and node.data == name for node in definition.body): raise ParseError(f"duplicate label '{name}' in definition '{definition.name}'") parser.emit_node(Op(op="label", data=name)) return None def macro_goto(ctx: MacroContext) -> Optional[List[Op]]: parser = ctx.parser if parser._eof(): raise ParseError("label name missing after 'goto'") tok = parser.next_token() name = tok.lexeme if not _is_identifier(name): raise ParseError(f"invalid label name '{name}'") _require_definition_context(parser, "goto") parser.emit_node(Op(op="jump", data=name)) return None def macro_compile_time(ctx: MacroContext) -> Optional[List[Op]]: """Run the next word at compile time and still emit it for runtime.""" parser = ctx.parser if parser._eof(): raise ParseError("word name missing after 'compile-time'") tok = parser.next_token() name = tok.lexeme word = parser.dictionary.lookup(name) if word is None: raise ParseError(f"unknown word '{name}' for compile-time") if word.compile_only: raise ParseError(f"word '{name}' is compile-time only") parser.compile_time_vm.invoke(word) if isinstance(parser.context_stack[-1], Definition): parser.emit_node(Op(op="word", data=name)) return None def macro_with(ctx: MacroContext) -> Optional[List[Op]]: parser = ctx.parser names: List[str] = [] template: Optional[Token] = None seen: set[str] = set() while True: if parser._eof(): raise ParseError("missing 'in' after 'with'") tok = parser.next_token() template = template or tok if tok.lexeme == "in": break if not _is_identifier(tok.lexeme): raise ParseError("invalid variable name in 'with'") if tok.lexeme in seen: raise ParseError("duplicate variable name in 'with'") seen.add(tok.lexeme) names.append(tok.lexeme) if not names: raise ParseError("'with' requires at least one variable name") body: List[Token] = [] depth = 0 while True: if parser._eof(): raise ParseError("unterminated 'with' block (missing 'end')") tok = parser.next_token() if tok.lexeme == "end": if depth == 0: break depth -= 1 body.append(tok) continue if tok.lexeme in ("with", "if", "for", "while", "begin", "word"): depth += 1 body.append(tok) helper_for: Dict[str, str] = {} for name in names: _, helper = parser.allocate_variable(name) helper_for[name] = helper emitted: List[str] = [] # Initialize variables by storing current stack values into their buffers for name in reversed(names): helper = helper_for[name] emitted.append(helper) emitted.append("!") i = 0 while i < len(body): tok = body[i] name = tok.lexeme helper = helper_for.get(name) if helper is not None: next_tok = body[i + 1] if i + 1 < len(body) else None if next_tok is not None and next_tok.lexeme == "!": emitted.append(helper) emitted.append("!") i += 2 continue if next_tok is not None and next_tok.lexeme == "@": emitted.append(helper) i += 1 continue emitted.append(helper) emitted.append("@") i += 1 continue emitted.append(tok.lexeme) i += 1 ctx.inject_tokens(emitted, template=template) return None def macro_begin_text_macro(ctx: MacroContext) -> Optional[List[Op]]: parser = ctx.parser if parser._eof(): raise ParseError("macro name missing after 'macro'") name_token = parser.next_token() param_count = 0 peek = parser.peek_token() if peek is not None: try: param_count = int(peek.lexeme, 0) parser.next_token() except ValueError: param_count = 0 parser._start_macro_recording(name_token.lexeme, param_count) return None def _struct_emit_definition(tokens: List[Token], template: Token, name: str, body: Sequence[str]) -> None: def make_token(lexeme: str) -> Token: return Token( lexeme=lexeme, line=template.line, column=template.column, start=template.start, end=template.end, ) tokens.append(make_token("word")) tokens.append(make_token(name)) for lexeme in body: tokens.append(make_token(lexeme)) tokens.append(make_token("end")) class SplitLexer: def __init__(self, parser: Parser, separators: str) -> None: self.parser = parser self.separators = set(separators) self.buffer: List[Token] = [] def _fill(self) -> None: while not self.buffer: if self.parser._eof(): raise ParseError("unexpected EOF inside custom lexer") token = self.parser.next_token() parts = _split_token_by_chars(token, self.separators) if not parts: continue self.buffer.extend(parts) def peek(self) -> Token: self._fill() return self.buffer[0] def pop(self) -> Token: token = self.peek() self.buffer.pop(0) return token def expect(self, lexeme: str) -> Token: token = self.pop() if token.lexeme != lexeme: raise ParseError(f"expected '{lexeme}' but found '{token.lexeme}'") return token def collect_brace_block(self) -> List[Token]: depth = 1 collected: List[Token] = [] while depth > 0: token = self.pop() if token.lexeme == "{": depth += 1 collected.append(token) continue if token.lexeme == "}": depth -= 1 if depth == 0: break collected.append(token) continue collected.append(token) return collected def push_back(self) -> None: if not self.buffer: return self.parser.tokens[self.parser.pos:self.parser.pos] = self.buffer self.buffer = [] def _split_token_by_chars(token: Token, separators: Set[str]) -> List[Token]: lex = token.lexeme if not lex: return [] parts: List[Token] = [] idx = 0 while idx < len(lex): char = lex[idx] if char in separators: parts.append(Token( lexeme=char, line=token.line, column=token.column + idx, start=token.start + idx, end=token.start + idx + 1, )) idx += 1 continue start_idx = idx while idx < len(lex) and lex[idx] not in separators: idx += 1 segment = lex[start_idx:idx] if segment: parts.append(Token( lexeme=segment, line=token.line, column=token.column + start_idx, start=token.start + start_idx, end=token.start + idx, )) return parts def _ensure_list(value: Any) -> List[Any]: if not isinstance(value, list): raise ParseError("expected list value") return value def _ensure_dict(value: Any) -> Dict[Any, Any]: if not isinstance(value, dict): raise ParseError("expected map value") return value def _ensure_lexer(value: Any) -> SplitLexer: if not isinstance(value, SplitLexer): raise ParseError("expected lexer value") return value def _coerce_str(value: Any) -> str: if isinstance(value, str): return value if isinstance(value, bool): return "1" if value else "0" if isinstance(value, int): return str(value) raise ParseError("expected string-compatible value") def _default_template(template: Optional[Token]) -> Token: if template is None: return Token(lexeme="", line=0, column=0, start=0, end=0) if not isinstance(template, Token): raise ParseError("expected token for template") return template def _ct_nil(vm: CompileTimeVM) -> None: vm.push(None) def _ct_nil_p(vm: CompileTimeVM) -> None: vm.push(1 if vm.pop() is None else 0) def _ct_list_new(vm: CompileTimeVM) -> None: vm.push([]) def _ct_list_clone(vm: CompileTimeVM) -> None: lst = _ensure_list(vm.pop()) vm.push(list(lst)) def _ct_list_append(vm: CompileTimeVM) -> None: value = vm.pop() lst = _ensure_list(vm.pop()) lst.append(value) vm.push(lst) def _ct_list_pop(vm: CompileTimeVM) -> None: lst = _ensure_list(vm.pop()) if not lst: raise ParseError("cannot pop from empty list") value = lst.pop() vm.push(lst) vm.push(value) def _ct_list_pop_front(vm: CompileTimeVM) -> None: lst = _ensure_list(vm.pop()) if not lst: raise ParseError("cannot pop from empty list") value = lst.pop(0) vm.push(lst) vm.push(value) def _ct_list_peek_front(vm: CompileTimeVM) -> None: lst = _ensure_list(vm.pop()) if not lst: raise ParseError("cannot peek from empty list") vm.push(lst) vm.push(lst[0]) def _ct_list_push_front(vm: CompileTimeVM) -> None: value = vm.pop() lst = _ensure_list(vm.pop()) lst.insert(0, value) vm.push(lst) def _ct_prelude_clear(vm: CompileTimeVM) -> None: vm.parser.custom_prelude = [] def _ct_prelude_append(vm: CompileTimeVM) -> None: line = vm.pop_str() if vm.parser.custom_prelude is None: vm.parser.custom_prelude = [] vm.parser.custom_prelude.append(line) def _ct_prelude_set(vm: CompileTimeVM) -> None: lines = _ensure_list(vm.pop()) if not all(isinstance(item, str) for item in lines): raise ParseError("prelude-set expects list of strings") vm.parser.custom_prelude = list(lines) def _ct_bss_clear(vm: CompileTimeVM) -> None: vm.parser.custom_bss = [] def _ct_bss_append(vm: CompileTimeVM) -> None: line = vm.pop_str() if vm.parser.custom_bss is None: vm.parser.custom_bss = [] vm.parser.custom_bss.append(line) def _ct_bss_set(vm: CompileTimeVM) -> None: lines = _ensure_list(vm.pop()) if not all(isinstance(item, str) for item in lines): raise ParseError("bss-set expects list of strings") vm.parser.custom_bss = list(lines) def _ct_list_reverse(vm: CompileTimeVM) -> None: lst = _ensure_list(vm.pop()) lst.reverse() vm.push(lst) def _ct_list_length(vm: CompileTimeVM) -> None: lst = vm.pop_list() vm.push(len(lst)) def _ct_list_empty(vm: CompileTimeVM) -> None: lst = _ensure_list(vm.pop()) vm.push(1 if not lst else 0) def _ct_loop_index(vm: CompileTimeVM) -> None: if not vm.loop_stack: raise ParseError("'i' used outside of a for loop") frame = vm.loop_stack[-1] idx = frame["initial"] - frame["remaining"] vm.push(idx) def _ct_list_get(vm: CompileTimeVM) -> None: index = vm.pop_int() lst = _ensure_list(vm.pop()) try: vm.push(lst[index]) except IndexError as exc: raise ParseError("list index out of range") from exc def _ct_list_set(vm: CompileTimeVM) -> None: value = vm.pop() index = vm.pop_int() lst = _ensure_list(vm.pop()) try: lst[index] = value except IndexError as exc: raise ParseError("list index out of range") from exc vm.push(lst) def _ct_list_clear(vm: CompileTimeVM) -> None: lst = _ensure_list(vm.pop()) lst.clear() vm.push(lst) def _ct_list_extend(vm: CompileTimeVM) -> None: source = _ensure_list(vm.pop()) target = _ensure_list(vm.pop()) target.extend(source) vm.push(target) def _ct_list_last(vm: CompileTimeVM) -> None: lst = _ensure_list(vm.pop()) if not lst: raise ParseError("list is empty") vm.push(lst[-1]) def _ct_map_new(vm: CompileTimeVM) -> None: vm.push({}) def _ct_map_set(vm: CompileTimeVM) -> None: value = vm.pop() key = vm.pop() map_obj = _ensure_dict(vm.pop()) map_obj[key] = value vm.push(map_obj) def _ct_map_get(vm: CompileTimeVM) -> None: key = vm.pop() map_obj = _ensure_dict(vm.pop()) vm.push(map_obj) if key in map_obj: vm.push(map_obj[key]) vm.push(1) else: vm.push(None) vm.push(0) def _ct_map_has(vm: CompileTimeVM) -> None: key = vm.pop() map_obj = _ensure_dict(vm.pop()) vm.push(map_obj) vm.push(1 if key in map_obj else 0) def _ct_string_eq(vm: CompileTimeVM) -> None: try: right = vm.pop_str() left = vm.pop_str() except ParseError as exc: raise ParseError(f"string= expects strings; stack={vm.stack!r}") from exc vm.push(1 if left == right else 0) def _ct_string_length(vm: CompileTimeVM) -> None: value = vm.pop_str() vm.push(len(value)) def _ct_string_append(vm: CompileTimeVM) -> None: right = vm.pop_str() left = vm.pop_str() vm.push(left + right) def _ct_string_to_number(vm: CompileTimeVM) -> None: text = vm.pop_str() try: value = int(text, 0) vm.push(value) vm.push(1) except ValueError: vm.push(0) vm.push(0) def _ct_set_token_hook(vm: CompileTimeVM) -> None: hook_name = vm.pop_str() vm.parser.token_hook = hook_name def _ct_clear_token_hook(vm: CompileTimeVM) -> None: vm.parser.token_hook = None def _ct_use_l2_compile_time(vm: CompileTimeVM) -> None: if vm.stack: name = vm.pop_str() word = vm.dictionary.lookup(name) else: word = vm.parser.most_recent_definition() if word is None: raise ParseError("use-l2-ct with empty stack and no recent definition") name = word.name if word is None: raise ParseError(f"unknown word '{name}' for use-l2-ct") word.compile_time_intrinsic = None word.compile_time_override = True def _ct_add_token(vm: CompileTimeVM) -> None: tok = vm.pop_str() vm.parser.reader.add_tokens([tok]) def _ct_add_token_chars(vm: CompileTimeVM) -> None: chars = vm.pop_str() vm.parser.reader.add_token_chars(chars) def _ct_shunt(vm: CompileTimeVM) -> None: """Convert an infix token list (strings) to postfix using +,-,*,/,%.""" ops: List[str] = [] output: List[str] = [] prec = {"+": 1, "-": 1, "*": 2, "/": 2, "%": 2} tokens = _ensure_list(vm.pop()) for tok in tokens: if not isinstance(tok, str): raise ParseError("shunt expects list of strings") if tok == "(": ops.append(tok) continue if tok == ")": while ops and ops[-1] != "(": output.append(ops.pop()) if not ops: raise ParseError("mismatched parentheses in expression") ops.pop() continue if tok in prec: while ops and ops[-1] in prec and prec[ops[-1]] >= prec[tok]: output.append(ops.pop()) ops.append(tok) continue output.append(tok) while ops: top = ops.pop() if top == "(": raise ParseError("mismatched parentheses in expression") output.append(top) vm.push(output) def _ct_int_to_string(vm: CompileTimeVM) -> None: value = vm.pop_int() vm.push(str(value)) def _ct_identifier_p(vm: CompileTimeVM) -> None: value = vm._resolve_handle(vm.pop()) if isinstance(value, Token): value = value.lexeme if not isinstance(value, str): vm.push(0) return vm.push(1 if _is_identifier(value) else 0) def _ct_token_lexeme(vm: CompileTimeVM) -> None: value = vm._resolve_handle(vm.pop()) if isinstance(value, Token): vm.push(value.lexeme) return if isinstance(value, str): vm.push(value) return raise ParseError("expected token or string on compile-time stack") def _ct_token_from_lexeme(vm: CompileTimeVM) -> None: template_value = vm.pop() lexeme = vm.pop_str() template = _default_template(template_value) vm.push(Token( lexeme=lexeme, line=template.line, column=template.column, start=template.start, end=template.end, )) def _ct_next_token(vm: CompileTimeVM) -> None: token = vm.parser.next_token() vm.push(token) def _ct_peek_token(vm: CompileTimeVM) -> None: vm.push(vm.parser.peek_token()) def _ct_inject_tokens(vm: CompileTimeVM) -> None: tokens = _ensure_list(vm.pop()) if not all(isinstance(item, Token) for item in tokens): raise ParseError("inject-tokens expects a list of tokens") vm.parser.inject_token_objects(tokens) def _ct_emit_definition(vm: CompileTimeVM) -> None: body = _ensure_list(vm.pop()) name_value = vm.pop() if isinstance(name_value, Token): template = name_value name = name_value.lexeme elif isinstance(name_value, str): template = _default_template(vm.pop()) name = name_value else: raise ParseError("emit-definition expects token or string for name") lexemes = [ item.lexeme if isinstance(item, Token) else _coerce_str(item) for item in body ] generated: List[Token] = [] _struct_emit_definition(generated, template, name, lexemes) vm.parser.inject_token_objects(generated) def _ct_parse_error(vm: CompileTimeVM) -> None: message = vm.pop_str() raise ParseError(message) def _ct_lexer_new(vm: CompileTimeVM) -> None: separators = vm.pop_str() vm.push(SplitLexer(vm.parser, separators)) def _ct_lexer_pop(vm: CompileTimeVM) -> None: lexer = _ensure_lexer(vm.pop()) token = lexer.pop() vm.push(lexer) vm.push(token) def _ct_lexer_peek(vm: CompileTimeVM) -> None: lexer = _ensure_lexer(vm.pop()) vm.push(lexer) vm.push(lexer.peek()) def _ct_lexer_expect(vm: CompileTimeVM) -> None: lexeme = vm.pop_str() lexer = _ensure_lexer(vm.pop()) token = lexer.expect(lexeme) vm.push(lexer) vm.push(token) def _ct_lexer_collect_brace(vm: CompileTimeVM) -> None: lexer = _ensure_lexer(vm.pop()) vm.push(lexer) vm.push(lexer.collect_brace_block()) def _ct_lexer_push_back(vm: CompileTimeVM) -> None: lexer = _ensure_lexer(vm.pop()) lexer.push_back() vm.push(lexer) def _register_compile_time_primitives(dictionary: Dictionary) -> None: def register(name: str, func: Callable[[CompileTimeVM], None], *, compile_only: bool = False) -> None: word = dictionary.lookup(name) if word is None: word = Word(name=name) dictionary.register(word) word.compile_time_intrinsic = func if compile_only: word.compile_only = True register("nil", _ct_nil, compile_only=True) register("nil?", _ct_nil_p, compile_only=True) register("list-new", _ct_list_new, compile_only=True) register("list-clone", _ct_list_clone, compile_only=True) register("list-append", _ct_list_append, compile_only=True) register("list-pop", _ct_list_pop, compile_only=True) register("list-pop-front", _ct_list_pop_front, compile_only=True) register("list-peek-front", _ct_list_peek_front, compile_only=True) register("list-push-front", _ct_list_push_front, compile_only=True) register("list-reverse", _ct_list_reverse, compile_only=True) register("list-length", _ct_list_length, compile_only=True) register("list-empty?", _ct_list_empty, compile_only=True) register("list-get", _ct_list_get, compile_only=True) register("list-set", _ct_list_set, compile_only=True) register("list-clear", _ct_list_clear, compile_only=True) register("list-extend", _ct_list_extend, compile_only=True) register("list-last", _ct_list_last, compile_only=True) register("i", _ct_loop_index, compile_only=True) register("prelude-clear", _ct_prelude_clear, compile_only=True) register("prelude-append", _ct_prelude_append, compile_only=True) register("prelude-set", _ct_prelude_set, compile_only=True) register("bss-clear", _ct_bss_clear, compile_only=True) register("bss-append", _ct_bss_append, compile_only=True) register("bss-set", _ct_bss_set, compile_only=True) register("map-new", _ct_map_new, compile_only=True) register("map-set", _ct_map_set, compile_only=True) register("map-get", _ct_map_get, compile_only=True) register("map-has?", _ct_map_has, compile_only=True) register("string=", _ct_string_eq, compile_only=True) register("string-length", _ct_string_length, compile_only=True) register("string-append", _ct_string_append, compile_only=True) register("string>number", _ct_string_to_number, compile_only=True) register("int>string", _ct_int_to_string, compile_only=True) register("identifier?", _ct_identifier_p, compile_only=True) register("shunt", _ct_shunt, compile_only=True) register("token-lexeme", _ct_token_lexeme, compile_only=True) register("token-from-lexeme", _ct_token_from_lexeme, compile_only=True) register("next-token", _ct_next_token, compile_only=True) register("peek-token", _ct_peek_token, compile_only=True) register("inject-tokens", _ct_inject_tokens, compile_only=True) register("add-token", _ct_add_token, compile_only=True) register("add-token-chars", _ct_add_token_chars, compile_only=True) register("set-token-hook", _ct_set_token_hook, compile_only=True) register("clear-token-hook", _ct_clear_token_hook, compile_only=True) register("use-l2-ct", _ct_use_l2_compile_time, compile_only=True) word_use_l2 = dictionary.lookup("use-l2-ct") if word_use_l2: word_use_l2.immediate = True register("emit-definition", _ct_emit_definition, compile_only=True) register("parse-error", _ct_parse_error, compile_only=True) register("lexer-new", _ct_lexer_new, compile_only=True) register("lexer-pop", _ct_lexer_pop, compile_only=True) register("lexer-peek", _ct_lexer_peek, compile_only=True) register("lexer-expect", _ct_lexer_expect, compile_only=True) register("lexer-collect-brace", _ct_lexer_collect_brace, compile_only=True) register("lexer-push-back", _ct_lexer_push_back, compile_only=True) PY_EXEC_GLOBALS: Dict[str, Any] = { "MacroContext": MacroContext, "Token": Token, "Op": Op, "StructField": StructField, "Definition": Definition, "Module": Module, "ParseError": ParseError, "emit_definition": _struct_emit_definition, "is_identifier": _is_identifier, } def macro_struct_begin(ctx: MacroContext) -> Optional[List[Op]]: parser = ctx.parser if parser._eof(): raise ParseError("struct name missing after 'struct'") name_token = parser.next_token() struct_name = name_token.lexeme fields: List[StructField] = [] current_offset = 0 while True: if parser._eof(): raise ParseError("unterminated struct definition (missing 'end')") token = parser.next_token() if token.lexeme == "end": break if token.lexeme != "field": raise ParseError( f"expected 'field' or 'end' in struct '{struct_name}' definition" ) if parser._eof(): raise ParseError("field name missing in struct definition") field_name_token = parser.next_token() if parser._eof(): raise ParseError(f"field size missing for '{field_name_token.lexeme}'") size_token = parser.next_token() try: field_size = int(size_token.lexeme, 0) except ValueError as exc: raise ParseError( f"invalid field size '{size_token.lexeme}' in struct '{struct_name}'" ) from exc fields.append(StructField(field_name_token.lexeme, current_offset, field_size)) current_offset += field_size generated: List[Token] = [] _struct_emit_definition(generated, name_token, f"{struct_name}.size", [str(current_offset)]) for field in fields: size_word = f"{struct_name}.{field.name}.size" offset_word = f"{struct_name}.{field.name}.offset" _struct_emit_definition(generated, name_token, size_word, [str(field.size)]) _struct_emit_definition(generated, name_token, offset_word, [str(field.offset)]) _struct_emit_definition( generated, name_token, f"{struct_name}.{field.name}@", [offset_word, "+", "@"], ) _struct_emit_definition( generated, name_token, f"{struct_name}.{field.name}!", [offset_word, "+", "!"], ) parser.tokens[parser.pos:parser.pos] = generated return None def macro_here(ctx: MacroContext) -> Optional[List[Op]]: tok = ctx.parser._last_token if tok is None: return [Op(op="literal", data=":0:0")] loc = ctx.parser.location_for_token(tok) return [Op(op="literal", data=f"{loc.path.name}:{loc.line}:{loc.column}")] def bootstrap_dictionary() -> Dictionary: dictionary = Dictionary() dictionary.register(Word(name="immediate", immediate=True, macro=macro_immediate)) dictionary.register(Word(name="compile-only", immediate=True, macro=macro_compile_only)) dictionary.register(Word(name="inline", immediate=True, macro=macro_inline)) dictionary.register(Word(name="label", immediate=True, macro=macro_label)) dictionary.register(Word(name="goto", immediate=True, macro=macro_goto)) dictionary.register(Word(name="compile-time", immediate=True, macro=macro_compile_time)) dictionary.register(Word(name="here", immediate=True, macro=macro_here)) dictionary.register(Word(name="with", immediate=True, macro=macro_with)) dictionary.register(Word(name="macro", immediate=True, macro=macro_begin_text_macro)) dictionary.register(Word(name="struct", immediate=True, macro=macro_struct_begin)) _register_compile_time_primitives(dictionary) return dictionary # --------------------------------------------------------------------------- # Driver # --------------------------------------------------------------------------- @dataclass(frozen=True) class FileSpan: path: Path start_line: int # inclusive (global line number in expanded source, 1-based) end_line: int # exclusive local_start_line: int # 1-based line in the original file class Compiler: def __init__(self, include_paths: Optional[Sequence[Path]] = None) -> None: self.reader = Reader() self.dictionary = bootstrap_dictionary() self._syscall_label_counter = 0 self._register_syscall_words() self.parser = Parser(self.dictionary, self.reader) self.assembler = Assembler(self.dictionary) if include_paths is None: include_paths = [Path("."), Path("./stdlib")] self.include_paths: List[Path] = [p.expanduser().resolve() for p in include_paths] def compile_source( self, source: str, spans: Optional[List[FileSpan]] = None, *, debug: bool = False, ) -> Emission: self.parser.file_spans = spans or [] tokens = self.reader.tokenize(source) module = self.parser.parse(tokens, source) return self.assembler.emit(module, debug=debug) def compile_file(self, path: Path, *, debug: bool = False) -> Emission: source, spans = self._load_with_imports(path.resolve()) return self.compile_source(source, spans=spans, debug=debug) def _resolve_import_target(self, importing_file: Path, target: str) -> Path: raw = Path(target) tried: List[Path] = [] if raw.is_absolute(): candidate = raw tried.append(candidate) if candidate.exists(): return candidate.resolve() candidate = (importing_file.parent / raw).resolve() tried.append(candidate) if candidate.exists(): return candidate for base in self.include_paths: candidate = (base / raw).resolve() tried.append(candidate) if candidate.exists(): return candidate tried_str = "\n".join(f" - {p}" for p in tried) raise ParseError( f"cannot import {target!r} from {importing_file}\n" f"tried:\n{tried_str}" ) def _register_syscall_words(self) -> None: word = self.dictionary.lookup("syscall") if word is None: word = Word(name="syscall") word.intrinsic = self._emit_syscall_intrinsic self.dictionary.register(word) def _emit_syscall_intrinsic(self, builder: FunctionEmitter) -> None: label_id = self._syscall_label_counter self._syscall_label_counter += 1 def lbl(suffix: str) -> str: return f"syscall_{label_id}_{suffix}" builder.pop_to("rax") # syscall number builder.pop_to("rcx") # arg count builder.emit(" ; clamp arg count to [0, 6]") builder.emit(" cmp rcx, 0") builder.emit(f" jge {lbl('count_nonneg')}") builder.emit(" xor rcx, rcx") builder.emit(f"{lbl('count_nonneg')}:") builder.emit(" cmp rcx, 6") builder.emit(f" jle {lbl('count_clamped')}") builder.emit(" mov rcx, 6") builder.emit(f"{lbl('count_clamped')}:") checks = [ (6, "r9"), (5, "r8"), (4, "r10"), (3, "rdx"), (2, "rsi"), (1, "rdi"), ] for threshold, reg in checks: builder.emit(f" cmp rcx, {threshold}") builder.emit(f" jl {lbl(f'skip_{reg}')}") builder.pop_to(reg) builder.emit(f"{lbl(f'skip_{reg}')}:") builder.emit(" syscall") builder.push_from("rax") def _load_with_imports(self, path: Path, seen: Optional[Set[Path]] = None) -> Tuple[str, List[FileSpan]]: if seen is None: seen = set() out_lines: List[str] = [] spans: List[FileSpan] = [] self._append_file_with_imports(path.resolve(), out_lines, spans, seen) return "\n".join(out_lines) + "\n", spans def _append_file_with_imports( self, path: Path, out_lines: List[str], spans: List[FileSpan], seen: Set[Path], ) -> None: path = path.resolve() if path in seen: return seen.add(path) try: contents = path.read_text() except FileNotFoundError as exc: raise ParseError(f"cannot import {path}: {exc}") from exc in_py_block = False brace_depth = 0 string_char = None escape = False segment_start_global: Optional[int] = None segment_start_local: int = 1 file_line_no = 1 def begin_segment_if_needed() -> None: nonlocal segment_start_global, segment_start_local if segment_start_global is None: segment_start_global = len(out_lines) + 1 segment_start_local = file_line_no def close_segment_if_open() -> None: nonlocal segment_start_global if segment_start_global is None: return spans.append( FileSpan( path=path, start_line=segment_start_global, end_line=len(out_lines) + 1, local_start_line=segment_start_local, ) ) segment_start_global = None def scan_line(line: str) -> None: nonlocal brace_depth, string_char, escape for ch in line: if string_char: if escape: escape = False elif ch == "\\": escape = True elif ch == string_char: string_char = None else: if ch in ("'", '"'): string_char = ch elif ch == "{": brace_depth += 1 elif ch == "}": brace_depth -= 1 for idx, line in enumerate(contents.splitlines()): stripped = line.strip() if not in_py_block and stripped.startswith(":py") and "{" in stripped: in_py_block = True brace_depth = 0 string_char = None escape = False scan_line(line) begin_segment_if_needed() out_lines.append(line) file_line_no += 1 if brace_depth == 0: in_py_block = False continue if in_py_block: scan_line(line) begin_segment_if_needed() out_lines.append(line) file_line_no += 1 if brace_depth == 0: in_py_block = False continue if stripped.startswith("import "): target = stripped.split(None, 1)[1].strip() if not target: raise ParseError(f"empty import target in {path}:{idx + 1}") # Keep a placeholder line so line numbers in the importing file stay stable. begin_segment_if_needed() out_lines.append("") file_line_no += 1 close_segment_if_open() target_path = self._resolve_import_target(path, target) self._append_file_with_imports(target_path, out_lines, spans, seen) continue begin_segment_if_needed() out_lines.append(line) file_line_no += 1 close_segment_if_open() def run_nasm(asm_path: Path, obj_path: Path, debug: bool = False) -> None: cmd = ["nasm", "-f", "elf64"] if debug: cmd.extend(["-g", "-F", "dwarf"]) cmd += ["-o", str(obj_path), str(asm_path)] subprocess.run(cmd, check=True) def run_linker(obj_path: Path, exe_path: Path, debug: bool = False, libs=None): libs = libs or [] lld = shutil.which("ld.lld") ld = shutil.which("ld") if lld: linker = lld use_lld = True elif ld: linker = ld use_lld = False else: raise RuntimeError("No linker found") cmd = [linker] if use_lld: cmd.extend(["-m", "elf_x86_64"]) cmd.extend([ "-o", str(exe_path), str(obj_path), ]) if not libs: cmd.extend(["-nostdlib", "-static"]) if libs: cmd.extend([ "-dynamic-linker", "/lib64/ld-linux-x86-64.so.2", ]) for lib in libs: if not lib: continue lib = str(lib) if lib.startswith(("-L", "-l", "-Wl,")): cmd.append(lib) continue if lib.startswith(":"): cmd.append(f"-l{lib}") continue if os.path.isabs(lib) or lib.startswith("./") or lib.startswith("../"): cmd.append(lib) continue if os.path.sep in lib or lib.endswith(".a"): cmd.append(lib) continue if ".so" in lib: cmd.append(f"-l:{lib}") continue cmd.append(f"-l{lib}") if debug: cmd.append("-g") subprocess.run(cmd, check=True) def run_repl( compiler: Compiler, temp_dir: Path, libs: Sequence[str], debug: bool = False, initial_source: Optional[Path] = None, ) -> int: def _block_defines_main(block: str) -> bool: stripped_lines = [ln.strip() for ln in block.splitlines() if ln.strip() and not ln.strip().startswith("#")] for idx, stripped in enumerate(stripped_lines): for prefix in ("word", ":asm", ":py", "extern"): if stripped.startswith(f"{prefix} "): rest = stripped[len(prefix):].lstrip() if rest.startswith("main"): return True if stripped == "word" and idx + 1 < len(stripped_lines): if stripped_lines[idx + 1].startswith("main"): return True return False temp_dir.mkdir(parents=True, exist_ok=True) asm_path = temp_dir / "repl.asm" obj_path = temp_dir / "repl.o" exe_path = temp_dir / "repl.out" src_path = temp_dir / "repl.sl" editor_cmd = os.environ.get("EDITOR") or "vim" default_imports = ["import stdlib/stdlib.sl", "import stdlib/io.sl"] imports: List[str] = list(default_imports) user_defs_files: List[str] = [] user_defs_repl: List[str] = [] main_body: List[str] = [] has_user_main = False if initial_source is not None: try: initial_text = initial_source.read_text() user_defs_files.append(initial_text) has_user_main = has_user_main or _block_defines_main(initial_text) if has_user_main: main_body.clear() print(f"[repl] loaded {initial_source}") except Exception as exc: print(f"[repl] failed to load {initial_source}: {exc}") def _print_help() -> None: print("[repl] commands:") print(" :help show this help") print(" :show display current session source (with synthetic main if pending snippet)") print(" :reset clear session imports/defs") print(" :load load a source file into the session") print(" :call compile and run a program that calls ") print(" :edit [file] open session file or given file in editor") print(" :seteditor [cmd] show/set editor command (default from $EDITOR or vim)") print(" :quit | :q exit the REPL") print("[repl] free-form input:") print(" definitions (word/:asm/:py/extern/macro/struct) extend the session") print(" imports add to session imports") print(" other lines run immediately in an isolated temp program (not saved)") print(" multiline: end lines with \\ to continue; finish with a non-\\ line") print("[repl] type L2 code; :help for commands; :quit to exit") print("[repl] enter multiline with trailing \\; finish with a line without \\") pending_block: List[str] = [] snippet_counter = 0 while True: try: line = input("l2> ") except EOFError: print() break stripped = line.strip() if stripped in {":quit", ":q"}: break if stripped == ":help": _print_help() continue if stripped == ":reset": imports = list(default_imports) user_defs_files.clear() user_defs_repl.clear() main_body.clear() has_user_main = False pending_block.clear() print("[repl] session cleared") continue if stripped.startswith(":seteditor"): parts = stripped.split(None, 1) if len(parts) == 1 or not parts[1].strip(): print(f"[repl] editor: {editor_cmd}") else: editor_cmd = parts[1].strip() print(f"[repl] editor set to: {editor_cmd}") continue if stripped.startswith(":edit"): arg = stripped.split(None, 1)[1].strip() if " " in stripped else "" target_path = Path(arg) if arg else src_path try: current_source = _repl_build_source( imports, user_defs_files, user_defs_repl, main_body, has_user_main, force_synthetic=bool(main_body), ) src_path.write_text(current_source) except Exception as exc: print(f"[repl] failed to sync source before edit: {exc}") try: if not target_path.exists(): target_path.parent.mkdir(parents=True, exist_ok=True) target_path.touch() cmd_parts = shlex.split(editor_cmd) subprocess.run([*cmd_parts, str(target_path)]) if target_path.resolve() == src_path.resolve(): try: updated = target_path.read_text() new_imports: List[str] = [] non_import_lines: List[str] = [] for ln in updated.splitlines(): stripped_ln = ln.strip() if stripped_ln.startswith("import "): new_imports.append(stripped_ln) else: non_import_lines.append(ln) imports = new_imports if new_imports else list(default_imports) new_body = "\n".join(non_import_lines).strip() user_defs_files = [new_body] if new_body else [] user_defs_repl.clear() main_body.clear() has_user_main = _block_defines_main(new_body) print("[repl] reloaded session source from editor") except Exception as exc: print(f"[repl] failed to reload edited source: {exc}") except Exception as exc: print(f"[repl] failed to launch editor: {exc}") continue if stripped == ":show": source = _repl_build_source(imports, user_defs_files, user_defs_repl, main_body, has_user_main, force_synthetic=True) print(source.rstrip()) continue if stripped.startswith(":load "): path_text = stripped.split(None, 1)[1].strip() target_path = Path(path_text) if not target_path.exists(): print(f"[repl] file not found: {target_path}") continue try: loaded_text = target_path.read_text() user_defs_files.append(loaded_text) if _block_defines_main(loaded_text): has_user_main = True main_body.clear() print(f"[repl] loaded {target_path}") except Exception as exc: print(f"[repl] failed to load {target_path}: {exc}") continue if stripped.startswith(":call "): word_name = stripped.split(None, 1)[1].strip() if not word_name: print("[repl] usage: :call ") continue try: if word_name == "main" and not has_user_main: print("[repl] cannot call main; no user-defined main present") continue if word_name == "main" and has_user_main: builder_source = _repl_build_source(imports, user_defs_files, user_defs_repl, [], True, force_synthetic=False) else: # Override entrypoint with a tiny wrapper that calls the target word. temp_defs_repl = [*user_defs_repl, f"word main\n {word_name}\nend"] builder_source = _repl_build_source(imports, user_defs_files, temp_defs_repl, [], True, force_synthetic=False) src_path.write_text(builder_source) emission = compiler.compile_file(src_path, debug=debug) compiler.assembler.write_asm(emission, asm_path) run_nasm(asm_path, obj_path, debug=debug) run_linker(obj_path, exe_path, debug=debug, libs=list(libs)) result = subprocess.run([str(exe_path)]) if result.returncode != 0: print(f"[warn] program exited with code {result.returncode}") except (ParseError, CompileError, CompileTimeError) as exc: print(f"[error] {exc}") except Exception as exc: print(f"[error] build failed: {exc}") continue if not stripped: continue # Multiline handling via trailing backslash if line.endswith("\\"): pending_block.append(line[:-1]) continue if pending_block: pending_block.append(line) block = "\n".join(pending_block) pending_block.clear() else: block = line block_stripped = block.lstrip() first_tok = block_stripped.split(None, 1)[0] if block_stripped else "" is_definition = first_tok in {"word", ":asm", ":py", "extern", "macro", "struct"} is_import = first_tok == "import" if is_import: imports.append(block_stripped) elif is_definition: if _block_defines_main(block): user_defs_repl = [d for d in user_defs_repl if not _block_defines_main(d)] has_user_main = True main_body.clear() user_defs_repl.append(block) else: # Run arbitrary snippet in an isolated temp program without touching session files. snippet_counter += 1 snippet_id = snippet_counter snippet_src = temp_dir / f"repl_snippet_{snippet_id}.sl" snippet_asm = temp_dir / f"repl_snippet_{snippet_id}.asm" snippet_obj = temp_dir / f"repl_snippet_{snippet_id}.o" snippet_exe = temp_dir / f"repl_snippet_{snippet_id}.out" snippet_source = _repl_build_source( imports, user_defs_files, user_defs_repl, block.splitlines(), has_user_main, force_synthetic=True, ) try: snippet_src.write_text(snippet_source) emission = compiler.compile_file(snippet_src, debug=debug) compiler.assembler.write_asm(emission, snippet_asm) run_nasm(snippet_asm, snippet_obj, debug=debug) run_linker(snippet_obj, snippet_exe, debug=debug, libs=list(libs)) except (ParseError, CompileError, CompileTimeError) as exc: print(f"[error] {exc}") for p in (snippet_src, snippet_asm, snippet_obj, snippet_exe): try: p.unlink(missing_ok=True) except Exception: pass continue except Exception as exc: print(f"[error] build failed: {exc}") for p in (snippet_src, snippet_asm, snippet_obj, snippet_exe): try: p.unlink(missing_ok=True) except Exception: pass continue try: result = subprocess.run([str(snippet_exe)]) if result.returncode != 0: print(f"[warn] program exited with code {result.returncode}") except Exception as exc: print(f"[error] execution failed: {exc}") finally: for p in (snippet_src, snippet_asm, snippet_obj, snippet_exe): try: p.unlink(missing_ok=True) except Exception: pass continue source = _repl_build_source(imports, user_defs_files, user_defs_repl, main_body, has_user_main, force_synthetic=bool(main_body)) try: src_path.write_text(source) emission = compiler.compile_file(src_path, debug=debug) except (ParseError, CompileError, CompileTimeError) as exc: print(f"[error] {exc}") continue try: compiler.assembler.write_asm(emission, asm_path) run_nasm(asm_path, obj_path, debug=debug) run_linker(obj_path, exe_path, debug=debug, libs=list(libs)) except Exception as exc: print(f"[error] build failed: {exc}") continue return 0 def _repl_build_source( imports: Sequence[str], file_defs: Sequence[str], repl_defs: Sequence[str], main_body: Sequence[str], has_user_main: bool, force_synthetic: bool = False, ) -> str: lines: List[str] = [] lines.extend(imports) lines.extend(file_defs) lines.extend(repl_defs) if (force_synthetic or not has_user_main) and main_body: lines.append("word main") for ln in main_body: if ln: lines.append(f" {ln}") else: lines.append("") lines.append("end") return "\n".join(lines) + "\n" def cli(argv: Sequence[str]) -> int: parser = argparse.ArgumentParser(description="L2 compiler driver") parser.add_argument("source", type=Path, nargs="?", default=None, help="input .sl file (optional when --clean is used)") parser.add_argument("-o", dest="output", type=Path, default=Path("a.out")) parser.add_argument( "-I", "--include", dest="include_paths", action="append", default=[], type=Path, help="add import search path (repeatable)", ) parser.add_argument("--emit-asm", action="store_true", help="stop after generating asm") parser.add_argument("--temp-dir", type=Path, default=Path("build")) parser.add_argument("--debug", action="store_true", help="compile with debug info") parser.add_argument("--run", action="store_true", help="run the built binary after successful build") parser.add_argument("--dbg", action="store_true", help="launch gdb on the built binary after successful build") parser.add_argument("--clean", action="store_true", help="remove the temp build directory and exit") parser.add_argument("--repl", action="store_true", help="interactive REPL; source file is optional") parser.add_argument("-l", dest="libs", action="append", default=[], help="pass library to linker (e.g. -l m or -l libc.so.6)") # Parse known and unknown args to allow -l flags anywhere args, unknown = parser.parse_known_args(argv) # Collect any -l flags from unknown args (e.g. -lfoo or -l foo) i = 0 while i < len(unknown): if unknown[i] == "-l" and i + 1 < len(unknown): args.libs.append(unknown[i + 1]) i += 2 elif unknown[i].startswith("-l"): args.libs.append(unknown[i][2:]) i += 1 else: i += 1 if args.clean: try: if args.temp_dir.exists(): shutil.rmtree(args.temp_dir) print(f"[info] removed {args.temp_dir}") else: print(f"[info] {args.temp_dir} does not exist") except Exception as exc: print(f"[error] failed to remove {args.temp_dir}: {exc}") return 1 return 0 if args.source is None and not args.repl: parser.error("the following arguments are required: source") compiler = Compiler(include_paths=[Path("."), Path("./stdlib"), *args.include_paths]) try: if args.repl: return run_repl(compiler, args.temp_dir, args.libs, debug=args.debug, initial_source=args.source) emission = compiler.compile_file(args.source, debug=args.debug) except (ParseError, CompileError, CompileTimeError) as exc: print(f"[error] {exc}") return 1 except Exception as exc: print(f"[error] unexpected failure: {exc}") return 1 args.temp_dir.mkdir(parents=True, exist_ok=True) asm_path = args.temp_dir / (args.source.stem + ".asm") obj_path = args.temp_dir / (args.source.stem + ".o") compiler.assembler.write_asm(emission, asm_path) if args.emit_asm: print(f"[info] wrote {asm_path}") return 0 run_nasm(asm_path, obj_path, debug=args.debug) run_linker(obj_path, args.output, debug=args.debug, libs=args.libs) print(f"[info] built {args.output}") exe_path = Path(args.output).resolve() if args.dbg: subprocess.run(["gdb", str(exe_path)]) elif args.run: subprocess.run([str(exe_path)]) return 0 def main() -> None: sys.exit(cli(sys.argv[1:])) if __name__ == "__main__": main()