Function getSignatureFromDeclaration

test/fixtures/snapshot/typescript.js:59621–59695

(declaration)

            return typeArguments && typeArguments.slice();
        }
        function getSignatureFromDeclaration(declaration) {
            var links = getNodeLinks(declaration);
            if (!links.resolvedSignature) {
                var parameters = [];
                var flags = 0 /* SignatureFlags.None */;
                var minArgumentCount = 0;
                var thisParameter = void 0;
                var hasThisParameter = false;
                var iife = ts.getImmediatelyInvokedFunctionExpression(declaration);
                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
                var isUntypedSignatureInJSFile = !iife &&
                    ts.isInJSFile(declaration) &&
                    ts.isValueSignatureDeclaration(declaration) &&
                    !ts.hasJSDocParameterTags(declaration) &&
                    !ts.getJSDocType(declaration);
                if (isUntypedSignatureInJSFile) {
                    flags |= 32 /* SignatureFlags.IsUntypedSignatureInJSFile */;
                }
                // If this is a JSDoc construct signature, then skip the first parameter in the
                // parameter list.  The first parameter represents the return type of the construct
                // signature.
                for (var i = isJSConstructSignature ? 1 : 0; i < declaration.parameters.length; i++) {
                    var param = declaration.parameters[i];
                    var paramSymbol = param.symbol;
                    var type = ts.isJSDocParameterTag(param) ? (param.typeExpression && param.typeExpression.type) : param.type;
                    // Include parameter symbol instead of property symbol in the signature
                    if (paramSymbol && !!(paramSymbol.flags & 4 /* SymbolFlags.Property */) && !ts.isBindingPattern(param.name)) {
                        var resolvedSymbol = resolveName(param, paramSymbol.escapedName, 111551 /* SymbolFlags.Value */, undefined, undefined, /*isUse*/ false);
                        paramSymbol = resolvedSymbol;
                    }
                    if (i === 0 && paramSymbol.escapedName === "this" /* InternalSymbolName.This */) {
                        hasThisParameter = true;
                        thisParameter = param.symbol;
                    }
                    else {
                        parameters.push(paramSymbol);
                    }
                    if (type && type.kind === 196 /* SyntaxKind.LiteralType */) {
                        flags |= 2 /* SignatureFlags.HasLiteralTypes */;
                    }
                    // Record a new minimum argument count if this is not an optional parameter
                    var isOptionalParameter_1 = isOptionalJSDocPropertyLikeTag(param) ||
                        param.initializer || param.questionToken || ts.isRestParameter(param) ||
                        iife && parameters.length > iife.arguments.length && !type ||
                        isJSDocOptionalParameter(param);
                    if (!isOptionalParameter_1) {
                        minArgumentCount = parameters.length;
                    }
                }
                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
                if ((declaration.kind === 172 /* SyntaxKind.GetAccessor */ || declaration.kind === 173 /* SyntaxKind.SetAccessor */) &&
                    hasBindableName(declaration) &&
                    (!hasThisParameter || !thisParameter)) {
                    var otherKind = declaration.kind === 172 /* SyntaxKind.GetAccessor */ ? 173 /* SyntaxKind.SetAccessor */ : 172 /* SyntaxKind.GetAccessor */;
                    var other = ts.getDeclarationOfKind(getSymbolOfNode(declaration), otherKind);
                    if (other) {
                        thisParameter = getAnnotatedAccessorThisParameter(other);
                    }