Function getOptionalCallSignature

test/fixtures/snapshot/typescript.js:57989–57999

(signature, callChainFlags)

            return result;
        }
        function getOptionalCallSignature(signature, callChainFlags) {
            if ((signature.flags & 24 /* SignatureFlags.CallChainFlags */) === callChainFlags) {
                return signature;
            }
            if (!signature.optionalCallSignatureCache) {
                signature.optionalCallSignatureCache = {};
            }
            var key = callChainFlags === 8 /* SignatureFlags.IsInnerCallChain */ ? "inner" : "outer";
            return signature.optionalCallSignatureCache[key]
                || (signature.optionalCallSignatureCache[key] = createOptionalCallSignature(signature, callChainFlags));
        }
        function createOptionalCallSignature(signature, callChainFlags) {
            ts.Debug.assert(callChainFlags === 8 /* SignatureFlags.IsInnerCallChain */ || callChainFlags === 16 /* SignatureFlags.IsOuterCallChain */, "An optional call signature can either be for an inner call chain or an outer call chain, but not both.");
            var result = cloneSignature(signature);