Examples with TInterface org.eclipse.n4js.ts.types.TInterface used on opensource projects

Example 16 with TInterface

use of org.eclipse.n4js.ts.types.TInterface in project n4js by eclipse.

the class N4JSSyntaxValidator method checkInterfaceDeclaration.

/**
 * Checks that no "with" or "role" is used and that list of implemented interfaces is separated with commas and not
 * with keywords. These checks (with some warnings created instead of errors) should help the transition from roles
 * to interfaces. However, they may be useful later on as well, e.g., if an interface is manually refactored into a
 * class or vice versa.
 * <p>
 * Note that "with" is used in Dart for roles, so maybe it is useful to have a user-friendly message instead of a
 * parser error.
 * <p>
 * "role" will be removed in grammar.
 */
@Check
public void checkInterfaceDeclaration(N4InterfaceDeclaration n4InterfaceDecl) {
    ICompositeNode node = NodeModelUtils.findActualNodeFor(n4InterfaceDecl);
    ILeafNode keywordNode;
    keywordNode = findLeafWithKeyword(n4InterfaceDecl, "{", node, IMPLEMENTS_KEYWORD, false);
    if (keywordNode != null) {
        TInterface tinterface = n4InterfaceDecl.getDefinedTypeAsInterface();
        if (tinterface == null) {
            // avoid consequential errors
            return;
        }
        if (tinterface.getSuperInterfaceRefs().isEmpty()) {
            // ok
            return;
        }
        if (tinterface.getSuperInterfaceRefs().stream().allMatch(superTypeRef -> superTypeRef.getDeclaredType() instanceof TInterface)) {
            List<? extends IdentifiableElement> interfaces = tinterface.getSuperInterfaceRefs().stream().flatMap((ParameterizedTypeRef ref) -> {
                Type declaredType = ref.getDeclaredType();
                if (declaredType instanceof TInterface) {
                    return Stream.of((TInterface) declaredType);
                }
                return Stream.empty();
            }).collect(Collectors.toList());
            String message = getMessageForSYN_KW_EXTENDS_IMPLEMENTS_MIXED_UP(validatorMessageHelper.description(tinterface), "implement", "interface" + (interfaces.size() > 1 ? "s " : " ") + validatorMessageHelper.names(interfaces), EXTENDS_KEYWORD);
            addIssue(message, n4InterfaceDecl, keywordNode.getTotalOffset(), keywordNode.getLength(), SYN_KW_EXTENDS_IMPLEMENTS_MIXED_UP);
        }
    }
}