| Server IP : 91.108.119.61 / Your IP : 216.73.216.254 Web Server : LiteSpeed System : Linux id-dci-web1986.main-hosting.eu 5.14.0-611.26.1.el9_7.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Jan 29 05:24:47 EST 2026 x86_64 User : u686484674 ( 686484674) PHP Version : 8.0.30 Disable Function : system, exec, shell_exec, passthru, mysql_list_dbs, ini_alter, dl, symlink, link, chgrp, leak, popen, apache_child_terminate, virtual, mb_send_mail MySQL : OFF | cURL : ON | WGET : ON | Perl : OFF | Python : OFF | Sudo : OFF | Pkexec : OFF Directory : /opt/gsutil/third_party/pyparsing/examples/ |
Upload File : |
"""
Created on 4 sept. 2010
@author: luca
Submitted by Luca DallOlio, September, 2010
"""
import unittest
from . import antlr_grammar
class Test(unittest.TestCase):
def testOptionsSpec(self):
text = """options {
language = Python;
}"""
antlr_grammar.optionsSpec.parseString(text) # @UndefinedVariable
def testTokensSpec(self):
text = """tokens {
PLUS = '+' ;
MINUS = '-' ;
MULT = '*' ;
DIV = '/' ;
}"""
antlr_grammar.tokensSpec.parseString(text) # @UndefinedVariable
def testBlock(self):
text = """( PLUS | MINUS )"""
antlr_grammar.block.parseString(text) # @UndefinedVariable
def testRule(self):
text = """expr : term ( ( PLUS | MINUS ) term )* ;"""
antlr_grammar.rule.parseString(text) # @UndefinedVariable
def testLexerRule(self):
text = """fragment DIGIT : '0'..'9' ;"""
antlr_grammar.rule.parseString(text) # @UndefinedVariable
def testLexerRule2(self):
text = """WHITESPACE : ( '\t' | ' ' | '\r' | '\n'| '\u000C' )+ { $channel = HIDDEN; } ;"""
# antlr_grammar.rule.parseString(text) #@UndefinedVariable
def testGrammar(self):
text = """grammar SimpleCalc;
options {
language = Python;
}
tokens {
PLUS = '+' ;
MINUS = '-' ;
MULT = '*' ;
DIV = '/' ;
}
/*------------------------------------------------------------------
* PARSER RULES
*------------------------------------------------------------------*/
expr : term ( ( PLUS | MINUS ) term )* ;
term : factor ( ( MULT | DIV ) factor )* ;
factor : NUMBER ;
/*------------------------------------------------------------------
* LEXER RULES
*------------------------------------------------------------------*/
NUMBER : (DIGIT)+ ;
/* WHITESPACE : ( '\t' | ' ' | '\r' | '\n'| '\u000C' )+ { $channel = HIDDEN; } ; */
fragment DIGIT : '0'..'9' ;"""
antlrGrammarTree = antlr_grammar.grammarDef.parseString(
text
) # @UndefinedVariable
pyparsingRules = antlr_grammar.antlrConverter(antlrGrammarTree)
pyparsingRule = pyparsingRules["expr"]
pyparsingTree = pyparsingRule.parseString("2 - 5 * 42 + 7 / 25")
pyparsingTreeList = pyparsingTree.asList()
print(pyparsingTreeList)
self.assertEqual(
pyparsingTreeList,
[
[
[["2"], []],
[
["-", [["5"], [["*", ["4", "2"]]]]],
["+", [["7"], [["/", ["2", "5"]]]]],
],
]
],
)
if __name__ == "__main__":
# import sys;sys.argv = ['', 'Test.testOptionsSpec']
unittest.main()