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view ply-3.8/test/lex_module_import.py @ 11461:2fde49626605 draft
<fizzie> learn HackEso is almost but not quite unlike HackEgo.
author | hackeso@dysnomia.zem.fi |
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date | Sat, 07 Apr 2018 23:42:32 +0100 |
parents | 343ff337a19b |
children |
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# ----------------------------------------------------------------------------- # lex_module_import.py # # A lexer defined in a module, but built in lex_module.py # ----------------------------------------------------------------------------- tokens = ( 'NAME','NUMBER', 'PLUS','MINUS','TIMES','DIVIDE','EQUALS', 'LPAREN','RPAREN', ) # Tokens t_PLUS = r'\+' t_MINUS = r'-' t_TIMES = r'\*' t_DIVIDE = r'/' t_EQUALS = r'=' t_LPAREN = r'\(' t_RPAREN = r'\)' t_NAME = r'[a-zA-Z_][a-zA-Z0-9_]*' def t_NUMBER(t): r'\d+' try: t.value = int(t.value) except ValueError: print("Integer value too large %s" % t.value) t.value = 0 return t t_ignore = " \t" def t_newline(t): r'\n+' t.lineno += t.value.count("\n") def t_error(t): print("Illegal character '%s'" % t.value[0]) t.lexer.skip(1)