Function checkTypeParameter

test/fixtures/snapshot/typescript.js:80015–80036

(node)

        }
        // DECLARATION AND STATEMENT TYPE CHECKING
        function checkTypeParameter(node) {
            // Grammar Checking
            checkGrammarModifiers(node);
            if (node.expression) {
                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
            }
            checkSourceElement(node.constraint);
            checkSourceElement(node.default);
            var typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(node));
            // Resolve base constraint to reveal circularity errors
            getBaseConstraintOfType(typeParameter);
            if (!hasNonCircularTypeParameterDefault(typeParameter)) {
                error(node.default, ts.Diagnostics.Type_parameter_0_has_a_circular_default, typeToString(typeParameter));
            }
            var constraintType = getConstraintOfTypeParameter(typeParameter);
            var defaultType = getDefaultFromTypeParameter(typeParameter);
            if (constraintType && defaultType) {
                checkTypeAssignableTo(defaultType, getTypeWithThisArgument(instantiateType(constraintType, makeUnaryTypeMapper(typeParameter, defaultType)), defaultType), node.default, ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
            }
            checkNodeDeferred(node);
            addLazyDiagnostic(function () { return checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0); });
        }
        function checkTypeParameterDeferred(node) {
            if (ts.isInterfaceDeclaration(node.parent) || ts.isClassLike(node.parent) || ts.isTypeAliasDeclaration(node.parent)) {
                var typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(node));