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153 lines
3.2 KiB
153 lines
3.2 KiB
#!/usr/bin/python3 -tt |
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# Copyright 2012 Jussi Pakkanen |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import ply.lex as lex |
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import ply.yacc as yacc |
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tokens = ['LPAREN', |
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'RPAREN', |
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'LBRACKET', |
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'RBRACKET', |
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'LBRACE', |
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'RBRACE', |
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'ATOM', |
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'COMMENT', |
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'EQUALS', |
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'COMMA', |
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'DOT', |
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'STRING', |
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'EOL_CONTINUE', |
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'EOL', |
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] |
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t_EQUALS = '=' |
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t_LPAREN = '\(' |
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t_RPAREN = '\)' |
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t_LBRACKET = '\[' |
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t_RBRACKET = '\]' |
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t_LBRACE = '\{' |
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t_RBRACE = '\}' |
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t_ATOM = '[a-zA-Z][_0-9a-zA-Z]*' |
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t_COMMENT = '\#[^\n]*' |
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t_COMMA = ',' |
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t_DOT = '\.' |
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t_ignore = ' \t' |
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def t_STRING(t): |
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"'[^']*'" |
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t.value = t.value[1:-1] |
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return t |
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def t_EOL(t): |
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r'\n' |
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t.lexer.lineno += 1 |
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return t |
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def t_EOL_CONTINUE(t): |
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r'\\[ \t]*\n' |
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t.lexer.lineno += 1 |
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def t_error(t): |
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print("Illegal character '%s'" % t.value[0]) |
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t.lexer.skip(1) |
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# Yacc part |
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def p_codeblock(t): |
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'codeblock : statement EOL codeblock' |
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print('Codeblock') |
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pass |
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def p_codeblock_last(t): |
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'codeblock : statement EOL' |
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print('Single line') |
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pass |
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#def p_codeblock_empty(t): |
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# 'codeblock :' |
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# pass |
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def p_expression_atom(t): |
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'expression : ATOM' |
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print('Atom: ' + t[1]) |
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t[0] = t[1] |
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def p_expression_string(t): |
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'expression : STRING' |
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print('String: ' + t[1]) |
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t[0] = t[1] |
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def p_statement_assign(t): |
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'statement : expression EQUALS statement' |
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pass |
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def p_statement_func_call(t): |
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'statement : expression LPAREN args RPAREN' |
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print('Function call: %s. Args: %s' % (str(t[1]), str(t[3]))) # t[1]) |
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def p_statement_method_call(t): |
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'statement : expression DOT expression LPAREN args RPAREN' |
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print('Method call: %s %s. Args: %s' % (str(t[1]), str(t[3]), str(t[5]))) |
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def p_statement_expression(t): |
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'statement : expression' |
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#print('s-e: ' + t[1]) |
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t[0] = t[1] |
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def p_args_multiple(t): |
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'args : statement COMMA args' |
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t[0] = [t[1]] + t[3] |
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def p_args_single(t): |
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'args : statement' |
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t[0] = [t[1]] |
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def p_args_none(t): |
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'args :' |
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t[0] = [] |
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def p_error(t): |
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print('Parser errored out at: ' + t.value) |
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def test_lexer(): |
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s = """hello = (something) # this = (that) |
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two = ['file1', 'file2'] |
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function(h) { stuff } |
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obj.method(lll, \\ |
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'string') |
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""" |
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lexer = lex.lex() |
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lexer.input(s) |
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while True: |
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tok = lexer.token() |
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if not tok: |
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break |
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print(tok) |
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def test_parser(): |
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code = """func_call('something', 'or else') |
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objectname.methodname(abc) |
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emptycall() |
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""" |
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lexer = lex.lex() |
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parser = yacc.yacc() |
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result = parser.parse(code) |
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print(result) |
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if __name__ == '__main__': |
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#test_lexer() |
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test_parser()
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