Examples with JSTypeNative com.google.javascript.rhino.jstype.JSTypeNative used on opensource projects

Example 1 with JSTypeNative

use of com.google.javascript.rhino.jstype.JSTypeNative in project closure-compiler by google.

the class TypeInference method traverseNewTarget.

private void traverseNewTarget(Node newTargetNode) {
    // new.target is (undefined|!Function) within a vanilla function and !Function within an ES6
    // constructor.
    // Find the closest non-arrow function (TODO(sdh): this could be an AbstractScope method).
    TypedScope scope = containerScope;
    while (scope != null && !NodeUtil.isNonArrowFunction(scope.getRootNode())) {
        scope = scope.getParent();
    }
    if (scope == null) {
        // NOTE: we already have a parse error for new.target outside a function.  The only other case
        // where this might happen is a top-level arrow function, which is a parse error in the VM,
        // but allowed by our parser.
        newTargetNode.setJSType(unknownType);
        return;
    }
    Node root = scope.getRootNode();
    Node parent = root.getParent();
    if (parent.getGrandparent().isClass()) {
        // In an ES6 constuctor, new.target may not be undefined.  In any other method, it must be
        // undefined, since methods are not constructable.
        JSTypeNative type = NodeUtil.isEs6ConstructorMemberFunctionDef(parent) ? JSTypeNative.FUNCTION_TYPE : VOID_TYPE;
        newTargetNode.setJSType(registry.getNativeType(type));
    } else {
        // Other functions also include undefined, in case they are not called with 'new'.
        newTargetNode.setJSType(registry.createUnionType(registry.getNativeType(JSTypeNative.FUNCTION_TYPE), registry.getNativeType(VOID_TYPE)));
    }
}