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Viewing changes to third_party/ply/test/lex_object.py

  • Committer: Package Import Robot
  • Author(s): Sylvestre Ledru
  • Date: 2013-05-02 13:11:51 UTC
  • Revision ID: package-import@ubuntu.com-20130502131151-q8dvteqr1ef2x7xz
Tags: upstream-1.4.1~20130504~adb56cb
Import upstream version 1.4.1~20130504~adb56cb

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third_party/ply/test/lex_object.py
 
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# -----------------------------------------------------------------------------
 
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# lex_object.py
 
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# -----------------------------------------------------------------------------
 
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import sys
 
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if ".." not in sys.path: sys.path.insert(0,"..")
 
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import ply.lex as lex
 
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class CalcLexer:
 
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    tokens = (
 
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        'NAME','NUMBER',
 
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        'PLUS','MINUS','TIMES','DIVIDE','EQUALS',
 
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        'LPAREN','RPAREN',
 
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        )
 
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    # Tokens
 
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    t_PLUS    = r'\+'
 
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    t_MINUS   = r'-'
 
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    t_TIMES   = r'\*'
 
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    t_DIVIDE  = r'/'
 
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    t_EQUALS  = r'='
 
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    t_LPAREN  = r'\('
 
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    t_RPAREN  = r'\)'
 
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    t_NAME    = r'[a-zA-Z_][a-zA-Z0-9_]*'
 
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    def t_NUMBER(self,t):
 
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        r'\d+'
 
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        try:
 
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            t.value = int(t.value)
 
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        except ValueError:
 
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            print("Integer value too large %s" % t.value)
 
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            t.value = 0
 
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        return t
 
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    t_ignore = " \t"
 
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    def t_newline(self,t):
 
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        r'\n+'
 
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        t.lineno += t.value.count("\n")
 
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    def t_error(self,t):
 
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        print("Illegal character '%s'" % t.value[0])
 
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        t.lexer.skip(1)
 
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calc = CalcLexer()
 
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# Build the lexer
 
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lex.lex(object=calc)
 
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lex.runmain(data="3+4")
 
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