langkit/testsuite/tests/java_api/rewriting/common/test.lkt

# Test that basic rewriting API usage behaves as expected

from lexer_example import foo_lexer

@with_lexer(foo_lexer)
@with_unparsers
grammar foo_grammar {
    @main_rule main_rule <- list*(or(var_rule | skip(ErrorDecl)))
    name <- Name(@Identifier)
    var_rule <- Var("var" name "=" value)
    value <- Literal(@Number)
}

@abstract
class FooNode implements Node[FooNode] {
}

@abstract
class Decl: FooNode {
    @abstract @parse_field @nullable name: Name
    @abstract @parse_field @nullable expr: Literal
}

class ErrorDecl: Decl implements ErrorNode {
    @parse_field @null_field name: Name
    @parse_field @null_field expr: Literal
}

class Var: Decl {
    @parse_field name: Name
    @parse_field expr: Literal
}

@custom_short_image
class Literal: FooNode implements TokenNode {
}

@custom_short_image
class Name: FooNode implements TokenNode {
}