120 lines
4.1 KiB
Plaintext
120 lines
4.1 KiB
Plaintext
import t, c
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from stdint import *
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import memhub
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import string
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# Import submodule
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from .tokens import (
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Token, TokenType, Keyword, TokOp, _init_tables,
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)
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# Common Section: Base Classes, Enums, Constants, Helper Functions, Dump
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from .base import (
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AST, Stmt, ExprNode, ASTKind, ASTCtx, OpKind, ASTFlag,
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# Constants
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CONST_INT, CONST_FLOAT, CONST_STR, CONST_BOOL, CONST_NONE, CONST_CHAR,
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FLAG_IS_ASYNC, FLAG_SIMPLE, FLAG_HAS_STAR,
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# Helper Functions
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_init_ast, _copy_str, _set_pos, _inherit_pos, _set_parent_list,
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_binop_from_op, _augop_from_op, _cmpop_from_op,
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_emit, _emit_str, _emit_int, _dump_list,
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dump, _op_name,
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)
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# Statement Nodes: Module, Expression, Interactive, FunctionType
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from .stmts import (
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# Module Layer
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Module, Expression, Interactive, FunctionType,
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# Statement
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FunctionDef, ClassDef, Return, Delete, Assign, AugAssign, AnnAssign,
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For, While, If, With, Raise, Try, Assert, Global, Nonlocal,
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Pass, Break, Continue, Expr, Import, ImportFrom, Match,
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)
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# Expression Nodes: BoolOp, BinOp, UnaryOp, Lambda, IfExp, Dict, Set
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from .exprs import (
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# Expression Layer
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BoolOp, BinOp, UnaryOp, Lambda, IfExp, Dict, Set,
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ListComp, SetComp, DictComp, GeneratorExp,
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Await, Yield, YieldFrom, FormattedValue, JoinedStr,
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Constant, NamedExpr, Attribute, Subscript, Starred, Name,
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List, Tuple, Slice,
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Call, Compare, OpNode,
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name_get_id, constant_get_str_val,
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binop_get_left, binop_get_right,
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attribute_get_attr, attribute_get_value,
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)
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# Auxiliary Nodes
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from .astaux import (
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ExceptHandler, Arguments, Arg, Keyword, Alias, WithItem,
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Comprehension,
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)
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# Pattern Matching
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from .match import (
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MatchCase, MatchValue, MatchSingleton, MatchSequence,
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MatchMapping, MatchClass, MatchStar, MatchAs, MatchOr,
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)
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# from .visitor import ASTVisitor
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from .lexer import Lexer, _lexer_init, tokenize, new_lexer
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from .parser import Parser, _parser_init, parse_tokens, new_parser
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from .parser import _parse_test
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from .parser import _dbg_lookup_lit_val, _dbg_lit_found
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from .parser import get_parse_err_line, get_parse_err_col, get_parse_err_msg
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# ============================================================
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# Global Memory Pool Pointer (follows project rules: declare _mbuddy)
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# User initializes in main: ast._mbuddy = memhub.MemBuddy(arena, size)
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# ============================================================
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_mbuddy: rawptr[memhub.MemBuddy]
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# ============================================================
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# Common API: parse
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# ============================================================
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def parse(src: str, pool: rawptr[memhub.MemManager]) -> rawptr[AST]:
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"""Parse Python source code, return the AST Module node.
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Parameters:
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src: NUL source code string, terminated with NUL
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pool: memhub.MemManager instance, to allocate AST nodes
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Returns:
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AST Module node, or None
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"""
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if src is None or pool is None:
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return None
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_init_tables(pool)
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lx: rawptr[Lexer] = new_lexer(pool)
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if lx is None:
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return None
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_lexer_init(lx, src, pool)
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tokens: rawptr[Token] = tokenize(lx)
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if tokens is None:
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return None
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tree: rawptr[AST] = parse_tokens(pool, tokens)
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return tree
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def parse_expression(src: str, pool: rawptr[memhub.MemManager]) -> rawptr[Expression]:
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"""Parse a single expression, return the Expression node.
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Parameters:
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src: NUL expression string, terminated with NUL
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pool: memhub.MemManager instance, to allocate AST nodes
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Returns:
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Expression node (包装节点，body 字段为实际表达式), or None
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"""
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if src is None or pool is None:
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return None
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_init_tables(pool)
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lx: rawptr[Lexer] = new_lexer(pool)
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if lx is None: return None
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_lexer_init(lx, src, pool)
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tokens: rawptr[Token] = tokenize(lx)
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if tokens is None: return None
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ps: rawptr[Parser] = new_parser(pool)
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if ps is None: return None
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_parser_init(ps, tokens, pool)
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body: rawptr[AST] = _parse_test(ps)
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return Expression(pool, body)
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