Function checkGrammarAccessor

test/fixtures/snapshot/typescript.js:88520–88564

(accessor)

            return false;
        }
        function checkGrammarAccessor(accessor) {
            if (!(accessor.flags & 16777216 /* NodeFlags.Ambient */) && (accessor.parent.kind !== 182 /* SyntaxKind.TypeLiteral */) && (accessor.parent.kind !== 258 /* SyntaxKind.InterfaceDeclaration */)) {
                if (languageVersion < 1 /* ScriptTarget.ES5 */) {
                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
                }
                if (languageVersion < 2 /* ScriptTarget.ES2015 */ && ts.isPrivateIdentifier(accessor.name)) {
                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.Private_identifiers_are_only_available_when_targeting_ECMAScript_2015_and_higher);
                }
                if (accessor.body === undefined && !ts.hasSyntacticModifier(accessor, 128 /* ModifierFlags.Abstract */)) {
                    return grammarErrorAtPos(accessor, accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
                }
            }
            if (accessor.body) {
                if (ts.hasSyntacticModifier(accessor, 128 /* ModifierFlags.Abstract */)) {
                    return grammarErrorOnNode(accessor, ts.Diagnostics.An_abstract_accessor_cannot_have_an_implementation);
                }
                if (accessor.parent.kind === 182 /* SyntaxKind.TypeLiteral */ || accessor.parent.kind === 258 /* SyntaxKind.InterfaceDeclaration */) {
                    return grammarErrorOnNode(accessor.body, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
                }
            }
            if (accessor.typeParameters) {
                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
            }
            if (!doesAccessorHaveCorrectParameterCount(accessor)) {
                return grammarErrorOnNode(accessor.name, accessor.kind === 172 /* SyntaxKind.GetAccessor */ ?
                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
            }
            if (accessor.kind === 173 /* SyntaxKind.SetAccessor */) {
                if (accessor.type) {
                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
                }
                var parameter = ts.Debug.checkDefined(ts.getSetAccessorValueParameter(accessor), "Return value does not match parameter count assertion.");
                if (parameter.dotDotDotToken) {
                    return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
                }
                if (parameter.questionToken) {
                    return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
                }
                if (parameter.initializer) {
                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
                }
            }
            return false;
        }
        /** Does the accessor have the right number of parameters?
         * A get accessor has no parameters or a single `this` parameter.
         * A set accessor has one parameter or a `this` parameter and one more parameter.