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diff ply-3.8/test/lex_optimize3.py @ 7267:343ff337a19b
<ais523> ` tar -xf ply-3.8.tar.gz
author | HackBot |
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date | Wed, 23 Mar 2016 02:40:16 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ply-3.8/test/lex_optimize3.py Wed Mar 23 02:40:16 2016 +0000 @@ -0,0 +1,52 @@ +# ----------------------------------------------------------------------------- +# lex_optimize3.py +# +# Writes table in a subdirectory structure. +# ----------------------------------------------------------------------------- +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="lexdir.sub.calctab" ,outputdir="lexdir/sub") +lex.runmain(data="3+4") + + +