prog8/il65/preprocess.py
2017-12-27 21:19:57 +01:00

66 lines
2.3 KiB
Python

"""
Programming Language for 6502/6510 microprocessors
This is the preprocessing parser of the IL65 code, that only generates a symbol table.
Written by Irmen de Jong (irmen@razorvine.net)
License: GNU GPL 3.0, see LICENSE
"""
from typing import List, Tuple
from .parse import Parser, ParseResult, SymbolTable, SymbolDefinition
class PreprocessingParser(Parser):
def __init__(self, filename: str) -> None:
super().__init__(filename, "", parsing_import=True)
self.print_block_parsing = False
def preprocess(self) -> Tuple[List[Tuple[int, str]], SymbolTable]:
def cleanup_table(symbols: SymbolTable):
symbols.owning_block = None # not needed here
for name, symbol in list(symbols.symbols.items()):
if isinstance(symbol, SymbolTable):
cleanup_table(symbol)
elif not isinstance(symbol, SymbolDefinition):
del symbols.symbols[name]
self.parse()
cleanup_table(self.root_scope)
return self.lines, self.root_scope
def print_warning(self, text: str) -> None:
pass
def load_source(self, filename: str) -> List[Tuple[int, str]]:
lines = super().load_source(filename)
# can do some additional source-level preprocessing here
return lines
def parse_file(self) -> ParseResult:
print("\npreprocessing", self.sourceref.file)
self._parse_1()
return self.result
def parse_asminclude(self, line: str) -> ParseResult.InlineAsm:
return ParseResult.InlineAsm([], self.sourceref.line)
def parse_statement(self, line: str) -> ParseResult._AstNode:
return None # type: ignore
def parse_var_def(self, line: str) -> None:
super().parse_var_def(line)
def parse_const_def(self, line: str) -> None:
super().parse_const_def(line)
def parse_memory_def(self, line: str, is_zeropage: bool=False) -> None:
super().parse_memory_def(line, is_zeropage)
def parse_label(self, line: str) -> None:
super().parse_label(line)
def parse_subroutine_def(self, line: str) -> None:
super().parse_subroutine_def(line)
def create_import_parser(self, filename: str, outputdir: str) -> 'Parser':
return PreprocessingParser(filename)