Function getRestTypeAtPosition

test/fixtures/snapshot/typescript.js:77564–77589

(source, pos)

            return undefined;
        }
        function getRestTypeAtPosition(source, pos) {
            var parameterCount = getParameterCount(source);
            var minArgumentCount = getMinArgumentCount(source);
            var restType = getEffectiveRestType(source);
            if (restType && pos >= parameterCount - 1) {
                return pos === parameterCount - 1 ? restType : createArrayType(getIndexedAccessType(restType, numberType));
            }
            var types = [];
            var flags = [];
            var names = [];
            for (var i = pos; i < parameterCount; i++) {
                if (!restType || i < parameterCount - 1) {
                    types.push(getTypeAtPosition(source, i));
                    flags.push(i < minArgumentCount ? 1 /* ElementFlags.Required */ : 2 /* ElementFlags.Optional */);
                }
                else {
                    types.push(restType);
                    flags.push(8 /* ElementFlags.Variadic */);
                }
                var name = getNameableDeclarationAtPosition(source, i);
                if (name) {
                    names.push(name);
                }
            }
            return createTupleType(types, flags, /*readonly*/ false, ts.length(names) === ts.length(types) ? names : undefined);
        }
        // Return the number of parameters in a signature. The rest parameter, if present, counts as one
        // parameter. For example, the parameter count of (x: number, y: number, ...z: string[]) is 3 and
        // the parameter count of (x: number, ...args: [number, ...string[], boolean])) is also 3. In the