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from .ply import yacc
class ParseWrapper(object):
def __init__(self, tokens=None, debug: bool = False):
if tokens is not None:
self.tokens = tokens
self.debug = debug
self.build(debug=debug)
def build(self, **kwargs):
self.parser = yacc.yacc(module=self, **kwargs)
def parse(self, *args, **kwargs):
return self.parser.parse(*args, **kwargs)
def _hl_token(self, p):
try:
linestart = p.lexer.lexdata.rfind("\n", 0, p.lexpos) + 1
lineend = p.lexer.lexdata.find("\n", p.lexpos)
markpos = p.lexpos - linestart
marklen = len(str(p.value))
lineno = p.lexer.lexdata[0 : linestart + 1].count("\n")
print(f"Syntax error at '{p.value}' on line {lineno}, position {markpos}")
print(f" {p.lexer.lexdata[linestart:lineend]}")
print(f" {' ' * markpos}{'^' * marklen}")
except Exception as e:
print(f"An error occured when showing the position of token {p}\n{e}")
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