def test_constant_bits(self):
Grammar = OMeta.makeGrammar(r"""
var = "var" spaces letter+:name ';' -> ['var', ''.join(name)]
""", {})
g = Grammar("var myvar;")
result,error = g.apply("var")
assert result == ['var', 'myvar']
def test_constant(self):
g = Grammar("""\
"abc"\
""")
result,error = g.apply("string")
assert result == '"abc"'
g = Grammar("""\
'abc'\
""")
result,error = g.apply("string")
assert result == "'abc'"
def test_read_ahead(self):
Grammar = OMeta.makeGrammar(r"""
attribute = bool | valued
bool = (letter+):name ~('=') -> (''.join(name),True)
valued = (letter+):name '=' (letter+):value -> (''.join(name),''.join(value))
""", {})
g = Grammar("a")
result,error = g.apply("attribute")
assert result == ('a',True)
g = Grammar("a=b")
result,error = g.apply("attribute")
assert result == ('a','b')
def test_nested_productions(self):
Grammar = OMeta.makeGrammar(r"""
attributes = spaces (attribute:a spaces -> a)+:as -> as
attribute = bool | valued
bool = (letter+):name ~('=') -> (''.join(name),True)
valued = (letter+):name '=' (letter+):value -> (''.join(name),''.join(value))
""", {})
g = Grammar("a=b")
result,error = g.apply("attributes")
assert result == [('a','b')]
g = Grammar("a=b c d=e")
result,error = g.apply("attributes")
assert result == [('a','b'),('c',True),('d','e')]
def test_import_macros(self):
self.assertStatements('''@import a.b.c as c;''',[
["import","a.b.c","c"]
])
self.assertStatements('''@import a.b.* as *;''',[
["starimport","a.b"]
])
g = Grammar("""\
@import a.b.c as c;""")
result,error = g.apply("statements")
resolved = expand_macros(result)
assert resolved == [["statement","var", " ","c","=","resolver",["parenthesis",[]],["parenthesis",['"',"a.b.c",'"']],";"]]
self.assertStatementsOut(resolved,'var c=resolver()("a.b.c");')
def test_comment(self):
g = Grammar("""\
// hello""")
result,error = g.apply("comment")
assert result == ["comment", " hello"]
g = Grammar("""\
/* hello */""")
result,error = g.apply("slcomment")
assert result == ["slcomment", " hello "]
g = Grammar("""\
/* hello */""")
result,error = g.apply("mlcomment")
assert result == ["mlcomment", " hello "]
g = Grammar("""\
/* hello "a/b/c"*/""")
result,error = g.apply("mlcomment")
assert result == ["mlcomment", ' hello "a/b/c"']
