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author | David Beazley <dave@dabeaz.com> | 2008-05-29 14:00:14 +0000 |
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committer | David Beazley <dave@dabeaz.com> | 2008-05-29 14:00:14 +0000 |
commit | 3d91085e98cd5d2ddd3822793ab33bbad8287f5c (patch) | |
tree | 81d1988b5dec2f2b51c465527a3fe103847808b0 /test/lex_object.py | |
parent | 912137883ba0ec6e0f0390c9664a7918ee529c14 (diff) | |
download | ply-3d91085e98cd5d2ddd3822793ab33bbad8287f5c.tar.gz |
Revamped testing framework
Diffstat (limited to 'test/lex_object.py')
-rw-r--r-- | test/lex_object.py | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/test/lex_object.py b/test/lex_object.py new file mode 100644 index 0000000..e10c95b --- /dev/null +++ b/test/lex_object.py @@ -0,0 +1,55 @@ +# ----------------------------------------------------------------------------- +# lex_object.py +# ----------------------------------------------------------------------------- +import sys + +if ".." not in sys.path: sys.path.insert(0,"..") +import ply.lex as lex + +class CalcLexer: + 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(self,t): + r'\d+' + try: + t.value = int(t.value) + except ValueError: + print "Integer value too large", t.value + t.value = 0 + return t + + t_ignore = " \t" + + def t_newline(self,t): + r'\n+' + t.lineno += t.value.count("\n") + + def t_error(self,t): + print "Illegal character '%s'" % t.value[0] + t.lexer.skip(1) + + +calc = CalcLexer() + +# Build the lexer +lex.lex(object=calc) +lex.runmain(data="3+4") + + + + |