def testLogicalExpression(self):
productionrulesetlogical = load_bnf_file("pydsl/contrib/grammar/LogicalExpression.bnf")
parser = RecursiveDescentParser(productionrulesetlogical)
result = parser.get_trees("True&&False")
self.assertTrue(result)
result = parser.get_trees("True&|False")
self.assertFalse(result)
def testHTMLTable(self):
productionrulesetlogical = load_bnf_file("pydsl/contrib/grammar/TrueHTMLTable.bnf")
parser = RecursiveDescentParser(productionrulesetlogical)
result = parser.get_trees("<table><tr><td>1</td></tr></table>")
self.assertTrue(result)
result = parser.get_trees("<trble><tr><td>1</td></tr></table>")
self.assertFalse(result)
def testLogicalExp(self):
productionrulesetlogical = load_bnf_file("pydsl/contrib/grammar/LogicalExpression.bnf")
#import pdb
#pdb.set_trace()
parser = RecursiveDescentParser(productionrulesetlogical)
result = parser.get_trees(self.tokelist5)
self.assertTrue(result)
class SyntaxDirectedTransformer(object):
def __init__(self, inputgrammar, outputgrammar, blockdic):
self.blockdic = blockdic
if isinstance(inputgrammar, str):
from pydsl.Memory.Loader import load
inputgrammar = load(inputgrammar)
from pydsl.Grammar.Parser.RecursiveDescent import RecursiveDescentParser
self.inputgrammar = inputgrammar
self.outputgrammar = outputgrammar
self.parser = RecursiveDescentParser(inputgrammar)
self.blockdic = blockdic
def __parseSymbolTokenTree(self, stt):
"""Returns a tokenlist"""
#productionruleset = list(self.inputchanneldic.values())[0].productionset
from pydsl.Grammar.Symbol import TerminalSymbol
if isinstance(stt.production, TerminalSymbol):
return stt.content
childlist = []
for child in stt.childlist:
childlist.append(self.__parseSymbolTokenTree(child))
if not str(stt.production) in self.blockdic and len(childlist) == 1:
return childlist[0]
return self.blockdic[str(stt.production)](childlist)
def __call__(self, word):
stt = self.parser.get_trees(word)[0]
return self.__parseSymbolTokenTree(stt)
@property
def summary(self):
return {"iclass":"SyntaxDirectedTransformer", "input":self.inputgrammar, "output":self.outputgrammar }
def __init__(self, inputgrammar, outputgrammar, blockdic):
self.blockdic = blockdic
if isinstance(inputgrammar, str):
from pydsl.Memory.Loader import load
inputgrammar = load(inputgrammar)
from pydsl.Grammar.Parser.RecursiveDescent import RecursiveDescentParser
self.inputgrammar = inputgrammar
self.outputgrammar = outputgrammar
self.parser = RecursiveDescentParser(inputgrammar)
self.blockdic = blockdic
def testTrueFalse(self):
productionrulesetlogical = load_bnf_file("pydsl/contrib/grammar/TrueFalse.bnf")
parser = RecursiveDescentParser(productionrulesetlogical)
result = parser.get_trees(self.tokelist5)
self.assertTrue(result)
def testRecursiveDescentParserStore(self):
from pydsl.Grammar.Parser.RecursiveDescent import RecursiveDescentParser
descentparser = RecursiveDescentParser(self.productionset1)
result = descentparser.check(self.tokelist1)
self.assertTrue(result)
def testCenterRecursion(self):
from pydsl.Grammar.Parser.RecursiveDescent import RecursiveDescentParser
descentparser = RecursiveDescentParser(self.productionsetcr)
result = descentparser.check(self.dots)
self.assertTrue(result)
def testRecursiveDescentParserNullBad(self):
from pydsl.Grammar.Parser.RecursiveDescent import RecursiveDescentParser
descentparser = RecursiveDescentParser(self.productionset2)
result = descentparser.check(self.tokelist4)
self.assertTrue(not result)
