Mercurial > repo
view ply-3.8/test/lex_optimize2.py @ 8672:0f128db8e215
<oerjan> ` sed -i \'s/ \\+/ /g;s/ $//\' wisdom/{math,utumno,wealtheow}
author | HackBot |
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date | Thu, 30 Jun 2016 23:34:38 +0000 |
parents | 343ff337a19b |
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# ----------------------------------------------------------------------------- # lex_optimize2.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,lextab="opt2tab") lex.runmain(data="3+4")