langkit/testsuite/tests/python_api/ghost_nodes/test.lkt

# Test that the "is_ghost" AST node predicate works in the Python API

from lexer_example import foo_lexer

@with_lexer(foo_lexer)
grammar foo_grammar {
    @main_rule main_rule <- list+(Param(name mode plus))
    name <- Name(@Identifier)
    mode <- or(
        | Enum.Null("null")
        | Enum.Example("example")
        | Enum.Default()
    )
    plus <- PlusQualifier("+")
}

@abstract
class FooNode implements Node[FooNode] {
}

enum class Enum: FooNode {
    case Null, Example, Default
}

class Name: FooNode implements TokenNode {
}

class Param: FooNode {
    @parse_field name: Name
    @parse_field mode: Enum
    @parse_field has_plus: PlusQualifier
}

@qualifier
enum class PlusQualifier: FooNode {
}