Function checkSignatureDeclarationDiagnostics

test/fixtures/snapshot/typescript.js:80210–80251

()

            }
            addLazyDiagnostic(checkSignatureDeclarationDiagnostics);
            function checkSignatureDeclarationDiagnostics() {
                checkCollisionWithArgumentsInGeneratedCode(node);
                var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
                if (noImplicitAny && !returnTypeNode) {
                    switch (node.kind) {
                        case 175 /* SyntaxKind.ConstructSignature */:
                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
                            break;
                        case 174 /* SyntaxKind.CallSignature */:
                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
                            break;
                    }
                }
                if (returnTypeNode) {
                    var functionFlags_1 = ts.getFunctionFlags(node);
                    if ((functionFlags_1 & (4 /* FunctionFlags.Invalid */ | 1 /* FunctionFlags.Generator */)) === 1 /* FunctionFlags.Generator */) {
                        var returnType = getTypeFromTypeNode(returnTypeNode);
                        if (returnType === voidType) {
                            error(returnTypeNode, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
                        }
                        else {
                            // Naively, one could check that Generator<any, any, any> is assignable to the return type annotation.
                            // However, that would not catch the error in the following case.
                            //
                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
                            //
                            var generatorYieldType = getIterationTypeOfGeneratorFunctionReturnType(0 /* IterationTypeKind.Yield */, returnType, (functionFlags_1 & 2 /* FunctionFlags.Async */) !== 0) || anyType;
                            var generatorReturnType = getIterationTypeOfGeneratorFunctionReturnType(1 /* IterationTypeKind.Return */, returnType, (functionFlags_1 & 2 /* FunctionFlags.Async */) !== 0) || generatorYieldType;
                            var generatorNextType = getIterationTypeOfGeneratorFunctionReturnType(2 /* IterationTypeKind.Next */, returnType, (functionFlags_1 & 2 /* FunctionFlags.Async */) !== 0) || unknownType;
                            var generatorInstantiation = createGeneratorReturnType(generatorYieldType, generatorReturnType, generatorNextType, !!(functionFlags_1 & 2 /* FunctionFlags.Async */));
                            checkTypeAssignableTo(generatorInstantiation, returnType, returnTypeNode);
                        }
                    }
                    else if ((functionFlags_1 & 3 /* FunctionFlags.AsyncGenerator */) === 2 /* FunctionFlags.Async */) {
                        checkAsyncFunctionReturnType(node, returnTypeNode);
                    }
                }
                if (node.kind !== 176 /* SyntaxKind.IndexSignature */ && node.kind !== 317 /* SyntaxKind.JSDocFunctionType */) {
                    registerForUnusedIdentifiersCheck(node);
                }
            }
        }
        function checkClassForDuplicateDeclarations(node) {
            var instanceNames = new ts.Map();