wehub-resource-sync
151 lines
4.6 KiB
Python
151 lines
4.6 KiB
Python
# Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import re
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from enum import Enum, auto
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class Token:
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def __init__(self, type, value):
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self.type = type
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self.value = value
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def __repr__(self):
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return f"Token({self.type}, {self.value!r})"
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class TokenType(Enum):
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IDENTIFIER = auto()
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NUMBER = auto()
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COLON = auto()
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LBRACKET = auto()
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RBRACKET = auto()
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COMMA = auto()
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RARROW = auto()
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STRING = auto()
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EQUAL = auto()
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NEWLINE = auto()
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EOF = auto()
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class Lexer:
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token_specification = [
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('RARROW', r'->'),
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('EQUAL', r'='),
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('COLON', r':'),
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('LBRACKET', r'\['),
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('RBRACKET', r'\]'),
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('COMMA', r','),
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('NUMBER', r'\d+'),
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('STRING', r'"[^"]*"|\'[^\']*\''),
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('IDENTIFIER', r'[A-Za-z_][A-Za-z\.\$\_\*\d\^T]*'),
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('SKIP', r'[ \t]+'),
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('NEWLINE', r'[\r\n]+'),
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('MISMATCH', r'.'),
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]
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def __init__(self, context, traceback=None):
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from .macros import macro_registry
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self.macros = [list(d.values())[1] for d in macro_registry.macros]
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self.get_token = re.compile(
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'|'.join(
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f'(?P<{name}>{regex})'
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for name, regex in self.token_specification
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)
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).match
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self.context = context
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self.traceback = traceback
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def tokenize(self, text):
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pos = 0
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mo = self.get_token(text, pos)
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tokens = []
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if not text.endswith('\n'):
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text += '\n'
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while mo is not None:
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kind = mo.lastgroup
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value = mo.group()
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if kind == 'SKIP':
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pass
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elif kind == 'MISMATCH':
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raise RuntimeError(
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f'Unexpected character {value!r} at position {pos}'
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)
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else:
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tokens.append(Token(TokenType[kind], value))
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pos = mo.end()
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mo = self.get_token(text, pos)
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return tokens
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def apply_macro(self, expression, macro):
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if isinstance(expression, str):
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expression = [expression]
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new_expression = []
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for expr in expression:
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results = macro(self.tokenize(expr), expr, self.context)
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if isinstance(results, str):
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new_expression.append(results)
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else:
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new_expression.extend(results)
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return new_expression
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def apply_single_macro_to_all(self, expressions, macro):
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new_expressions = []
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macro_name = getattr(macro, "__name__", "macro")
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for expr in expressions:
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try:
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results = macro(self.tokenize(expr), expr, self.context)
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except (AssertionError, ValueError, KeyError, RuntimeError) as e:
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if self.traceback:
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chain = self.traceback.build_chain(expr)
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self.traceback.add_error(
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error_message=str(e),
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stage=f"{macro_name}",
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chain=chain,
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error_type=type(e).__name__,
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)
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self.traceback.print()
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raise
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if isinstance(results, str):
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results_list = [results]
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else:
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results_list = list(results)
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if self.traceback:
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if results_list != [expr]:
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self.traceback.record_children(
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expr, results_list, macro_name
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)
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new_expressions.extend(results_list)
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return new_expressions
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def all_tokens(self, expressions):
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if self.traceback:
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self.traceback.register_roots(list(expressions))
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current_expressions = expressions
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for macro in self.macros:
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current_expressions = self.apply_single_macro_to_all(
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current_expressions, macro
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)
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self.final_expressions = list(current_expressions)
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tokens = []
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for expr in current_expressions:
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tokens.extend(self.tokenize(expr))
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return tokens
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