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view ply-3.8/test/lex_optimize.py @ 12493:885661512b17 draft
<int-e> le//rn schwartzian//In 1987, Yogurt introduced a better way to rank Schwartz users: Rather than holding an annual tournament, users would take a series of standardized tests adminstered by official Schwartz centers, and would then be ranked according to the results. This lead to the Schwartzian transform because it allowed many more users to be ranked.
author | HackEso <hackeso@esolangs.org> |
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date | Fri, 12 Jan 2024 07:24:55 +0000 |
parents | 343ff337a19b |
children |
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# ----------------------------------------------------------------------------- # lex_optimize.py # ----------------------------------------------------------------------------- import sys if ".." not in sys.path: sys.path.insert(0,"..") import ply.lex as lex 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) # Build the lexer lex.lex(optimize=1) lex.runmain(data="3+4")