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#!/usr/bin/python3 -tt
# Copyright 2012 Jussi Pakkanen
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import ply.lex as lex
import ply.yacc as yacc
tokens = ['LPAREN',
'RPAREN',
'VARIABLE',
'COMMENT',
'EQUALS',
'COMMA',
'DOT',
'STRING']
t_EQUALS = '='
t_LPAREN = '\('
t_RPAREN = '\)'
t_VARIABLE = '[a-zA-Z][_0-9a-zA-Z]*'
t_COMMENT = '\#[^\n]*'
t_COMMA = ','
t_DOT = '\.'
t_STRING = "'[^']*'"
t_ignore = ' \t\n'
def t_error(t):
print("Illegal character '%s'" % t.value[0])
t.lexer.skip(1)
def test_lexer():
s = """hello = (something) # this = (that)
function(h)
obj.method(lll, 'string')
"""
lexer = lex.lex()
lexer.input(s)
while True:
tok = lexer.token()
if not tok:
break
print(tok)
if __name__ == '__main__':
test_lexer()
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