def compile(self, grammar):
"""
Produce an object capable of parsing via this grammar.
@param grammar: A string containing an OMeta grammar.
"""
from pymeta.grammar import OMetaGrammar, NullOptimizer
g = OMetaGrammar(dedent(grammar))
tree = g.parseGrammar('TestGrammar', TreeBuilder)
opt = NullOptimizer([tree])
opt.builder = TreeBuilder("TestGrammar", opt)
tree, err = opt.apply("grammar")
grammarClass = moduleFromGrammar(tree, 'TestGrammar', OMetaBase, {})
return HandyWrapper(grammarClass)
def compile(self, grammar):
"""
Produce an object capable of parsing via this grammar.
@param grammar: A string containing an OMeta grammar.
"""
from pymeta.grammar import OMetaGrammar, NullOptimizer
g = OMetaGrammar(grammar)
tree = g.parseGrammar('TestGrammar', TreeBuilder)
opt = NullOptimizer([tree])
opt.builder = TreeBuilder("TestGrammar", opt)
tree, err = opt.apply("grammar")
grammarClass = moduleFromGrammar(tree, 'TestGrammar', OMetaBase, {})
return HandyWrapper(grammarClass)
def compile(self, grammar):
"""
Produce an object capable of parsing via this grammar.
@param grammar: A string containing an OMeta grammar.
"""
from pymeta.grammar import OMetaGrammar, NullOptimizer
g = OMetaGrammar(grammar)
tree = g.parseGrammar('TestGrammar', TreeBuilder)
opt = NullOptimizer([tree])
opt.builder = AstBuilder("<grammar>", opt)
methodDict = opt.apply("grammar")
grammarClass = type("<grammar>", (OMetaBase,), methodDict)
return HandyWrapper(grammarClass)
def compile(self, grammar):
"""
Produce an object capable of parsing via this grammar.
@param grammar: A string containing an OMeta grammar.
"""
from pymeta.grammar import OMetaGrammar, NullOptimizer
g = OMetaGrammar(grammar)
tree = g.parseGrammar('TestGrammar', TreeBuilder)
opt = NullOptimizer([tree])
opt.builder = AstBuilder("<grammar>", opt)
methodDict = opt.apply("grammar")
grammarClass = type("<grammar>", (OMetaBase, ), methodDict)
return HandyWrapper(grammarClass)
operator = token("+") | token("-")
"""
Grammar = OMeta.makeGrammar(grammar, {})
parser = Grammar("5 + 7")
ast, err = parser.apply("start")
print "AST: " + str(ast)
## parsing list with `ast` as input...
grammar_ast = """
start = ['+' number:a number:b] -> a + b
| ['-' number:a number:b] -> a - b
number = :a
"""
ASTGrammar = OMetaGrammar(grammar_ast)
t = ASTGrammar.parseGrammar('SomeGrammarName', TreeBuilder)
ASTParser = moduleFromGrammar(t, 'SomeGrammarName', OMetaBase, {})
parser = ASTParser([ast])
res, err = parser.apply("start")
print "result: " + str(res)
### formating parse error
try:
parser = Grammar("1 + a")
ast, err = parser.apply("start")
except Exception as err:
print err.formatError(''.join(parser.input.data))
