def generate_Repeat(self, out, min, max, expr, debugname=None):
out.emit(t.Python(str(min.data)))
out.emit(t.Push())
out.emit(t.Python(str(max.data)))
out.emit(t.Push())
L = out.emit(t.RepeatChoice())
self._generateNode(out, expr, debugname)
L2 = out.emit(t.Commit())
out.patchNext(L)
out.backpatch(L2, L)
def test_superApply(self):
one = t.Action("1")
x = t.Action("x")
a = t.Apply("super", "main", [one, x])
self.assertEqual(writeBytecode(a),
[t.Python('1'),
t.Push(),
t.Python('x'),
t.Push(),
t.SuperCall('main')])
def test_foreignApply(self):
one = t.Action("1")
x = t.Action("x")
a = t.ForeignApply("thegrammar", "foo", "main", [one, x])
self.assertEqual(writeBytecode(a),
[t.Python('1'),
t.Push(),
t.Python('x'),
t.Push(),
t.ForeignCall('thegrammar', 'foo')])
def test_repeat(self):
x = t.Repeat(3, 4, t.Exactly('x'))
self.assertEqual(writeBytecode(x),
[t.Python("3"),
t.Push(),
t.Python("4"),
t.Push(),
t.RepeatChoice(3),
t.Match('x'),
t.Commit(-2)])
def test_apply(self):
one = t.Action("1")
x = t.Action("x")
a = t.Apply("foo", "main", [one, x])
self.assertEqual(writeBytecode(a),
[t.Python('1'),
t.Push(),
t.Python('x'),
t.Push(),
t.Call('foo')])
def test_optional(self):
x = t.Optional(t.Exactly("x"))
self.assertEqual(writeBytecode(x),
[t.Choice(3),
t.Match('x'),
t.Commit(2),
t.Python("None")])
def generate_Optional(self, out, expr, debugname=None):
"""
Try to parse an expr and continue if it fails.
"""
L = out.emit(t.Choice())
self._generateNode(out, expr, debugname)
L2 = out.emit(t.Commit())
out.emit(t.Python("None"), label=L)
out.patchNext(L2)
def _generateNode(self, out, node, debugname=None):
name = node.tag.name
args = node.args
if node.data is not None:
out.emit(t.Literal(node.data))
return
if name == 'null':
out.emit(t.Python("None"))
return getattr(self, "generate_" + name)(out,
*args,
debugname=debugname)
def test_pred(self):
x = t.Predicate(t.Action("doStuff()"))
self.assertEqual(
writeBytecode(x),
[t.Python('doStuff()'), t.Predicate()])
def generate_Python(self, out, expr, debugname=None):
out.emit(t.Python(expr.data))