903 lines
28 KiB
TypeScript
903 lines
28 KiB
TypeScript
"use strict";
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import { BigNumber } from "@ethersproject/bignumber";
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import { defineReadOnly } from "@ethersproject/properties";
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import { Logger } from "@ethersproject/logger";
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import { version } from "./_version";
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const logger = new Logger(version);
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export interface JsonFragmentType {
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name?: string;
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indexed?: boolean;
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type?: string;
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components?: Array<JsonFragmentType>;
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}
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export interface JsonFragment {
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name?: string;
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type?: string;
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anonymous?: boolean;
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payable?: boolean;
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constant?: boolean;
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stateMutability?: string;
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inputs?: Array<JsonFragmentType>;
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outputs?: Array<JsonFragmentType>;
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gas?: string;
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};
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const _constructorGuard = { };
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// AST Node parser state
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type ParseState = {
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allowArray?: boolean,
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allowName?: boolean,
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allowParams?: boolean,
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allowType?: boolean,
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readArray?: boolean,
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};
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// AST Node
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type ParseNode = {
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parent?: any,
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type?: string,
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name?: string,
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state?: ParseState,
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indexed?: boolean,
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components?: Array<ParseNode>
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};
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let ModifiersBytes: { [ name: string ]: boolean } = { calldata: true, memory: true, storage: true };
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function checkModifier(type: string, name: string): boolean {
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if (type === "bytes" || type === "string") {
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if (ModifiersBytes[name]) { return true; }
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} else if (type === "address") {
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if (name === "payable") { return true; }
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}
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if (ModifiersBytes[name] || name === "payable") {
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logger.throwArgumentError("invalid modifier", "name", name);
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}
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return false;
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}
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// @TODO: Make sure that children of an indexed tuple are marked with a null indexed
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function parseParamType(param: string, allowIndexed: boolean): ParseNode {
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let originalParam = param;
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function throwError(i: number) {
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throw new Error("unexpected character '" + originalParam[i] + "' at position " + i + " in '" + originalParam + "'");
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}
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param = param.replace(/\s/g, " ");
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function newNode(parent: ParseNode): ParseNode {
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let node: ParseNode = { type: "", name: "", parent: parent, state: { allowType: true } };
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if (allowIndexed) { node.indexed = false; }
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return node
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}
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let parent: ParseNode = { type: "", name: "", state: { allowType: true } };
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let node = parent;
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for (let i = 0; i < param.length; i++) {
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let c = param[i];
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switch (c) {
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case "(":
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if (node.state.allowType && node.type === "") {
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node.type = "tuple";
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} else if (!node.state.allowParams) {
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throwError(i);
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}
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node.state.allowType = false;
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node.type = verifyType(node.type);
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node.components = [ newNode(node) ];
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node = node.components[0];
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break;
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case ")":
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delete node.state;
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if (node.name === "indexed") {
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if (!allowIndexed) { throwError(i); }
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node.indexed = true;
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node.name = "";
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}
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if (checkModifier(node.type, node.name)) { node.name = ""; }
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node.type = verifyType(node.type);
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let child = node;
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node = node.parent;
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if (!node) { throwError(i); }
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delete child.parent;
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node.state.allowParams = false;
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node.state.allowName = true;
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node.state.allowArray = true;
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break;
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case ",":
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delete node.state;
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if (node.name === "indexed") {
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if (!allowIndexed) { throwError(i); }
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node.indexed = true;
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node.name = "";
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}
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if (checkModifier(node.type, node.name)) { node.name = ""; }
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node.type = verifyType(node.type);
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let sibling: ParseNode = newNode(node.parent);
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//{ type: "", name: "", parent: node.parent, state: { allowType: true } };
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node.parent.components.push(sibling);
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delete node.parent;
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node = sibling;
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break;
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// Hit a space...
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case " ":
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// If reading type, the type is done and may read a param or name
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if (node.state.allowType) {
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if (node.type !== "") {
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node.type = verifyType(node.type);
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delete node.state.allowType;
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node.state.allowName = true;
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node.state.allowParams = true;
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}
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}
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// If reading name, the name is done
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if (node.state.allowName) {
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if (node.name !== "") {
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if (node.name === "indexed") {
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if (!allowIndexed) { throwError(i); }
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if (node.indexed) { throwError(i); }
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node.indexed = true;
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node.name = "";
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} else if (checkModifier(node.type, node.name)) {
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node.name = "";
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} else {
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node.state.allowName = false;
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}
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}
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}
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break;
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case "[":
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if (!node.state.allowArray) { throwError(i); }
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node.type += c;
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node.state.allowArray = false;
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node.state.allowName = false;
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node.state.readArray = true;
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break;
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case "]":
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if (!node.state.readArray) { throwError(i); }
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node.type += c;
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node.state.readArray = false;
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node.state.allowArray = true;
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node.state.allowName = true;
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break;
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default:
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if (node.state.allowType) {
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node.type += c;
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node.state.allowParams = true;
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node.state.allowArray = true;
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} else if (node.state.allowName) {
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node.name += c;
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delete node.state.allowArray;
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} else if (node.state.readArray) {
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node.type += c;
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} else {
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throwError(i);
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}
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}
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}
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if (node.parent) { throw new Error("unexpected eof"); }
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delete parent.state;
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if (node.name === "indexed") {
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if (!allowIndexed) { throwError(originalParam.length - 7); }
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if (node.indexed) { throwError(originalParam.length - 7); }
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node.indexed = true;
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node.name = "";
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} else if (checkModifier(node.type, node.name)) {
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node.name = "";
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}
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parent.type = verifyType(parent.type);
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return parent;
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}
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function populate(object: any, params: any) {
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for (let key in params) { defineReadOnly(object, key, params[key]); }
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}
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export const FormatTypes: { [ name: string ]: string } = Object.freeze({
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// Bare formatting, as is needed for computing a sighash of an event or function
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sighash: "sighash",
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// Human-Readable with Minimal spacing and without names (compact human-readable)
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minimal: "minimal",
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// Human-Readble with nice spacing, including all names
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full: "full",
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// JSON-format a la Solidity
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json: "json"
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});
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const paramTypeArray = new RegExp(/^(.*)\[([0-9]*)\]$/);
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export class ParamType {
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// The local name of the parameter (of null if unbound)
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readonly name: string;
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// The fully qualified type (e.g. "address", "tuple(address)", "uint256[3][]"
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readonly type: string;
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// The base type (e.g. "address", "tuple", "array")
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readonly baseType: string;
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// Indexable Paramters ONLY (otherwise null)
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readonly indexed: boolean;
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// Tuples ONLY: (otherwise null)
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// - sub-components
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readonly components: Array<ParamType>;
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// Arrays ONLY: (otherwise null)
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// - length of the array (-1 for dynamic length)
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// - child type
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readonly arrayLength: number;
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readonly arrayChildren: ParamType;
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readonly _isParamType: boolean;
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constructor(constructorGuard: any, params: any) {
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if (constructorGuard !== _constructorGuard) { throw new Error("use fromString"); }
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populate(this, params);
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let match = this.type.match(paramTypeArray);
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if (match) {
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populate(this, {
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arrayLength: parseInt(match[2] || "-1"),
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arrayChildren: ParamType.fromObject({
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type: match[1],
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components: this.components
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}),
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baseType: "array"
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});
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} else {
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populate(this, {
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arrayLength: null,
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arrayChildren: null,
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baseType: ((this.components != null) ? "tuple": this.type)
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});
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}
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this._isParamType = true;
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Object.freeze(this);
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}
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// Format the parameter fragment
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// - sighash: "(uint256,address)"
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// - minimal: "tuple(uint256,address) indexed"
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// - full: "tuple(uint256 foo, addres bar) indexed baz"
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format(format?: string): string {
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if (!format) { format = FormatTypes.sighash; }
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if (!FormatTypes[format]) {
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logger.throwArgumentError("invalid format type", "format", format);
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}
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if (format === FormatTypes.json) {
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let result: any = {
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type: ((this.baseType === "tuple") ? "tuple": this.type),
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name: (this.name || undefined)
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};
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if (typeof(this.indexed) === "boolean") { result.indexed = this.indexed; }
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if (this.components) {
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result.components = this.components.map((comp) => JSON.parse(comp.format(format)));
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}
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return JSON.stringify(result);
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}
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let result = "";
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// Array
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if (this.baseType === "array") {
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result += this.arrayChildren.format(format);
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result += "[" + (this.arrayLength < 0 ? "": String(this.arrayLength)) + "]";
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} else {
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if (this.baseType === "tuple") {
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if (format !== FormatTypes.sighash) {
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result += this.type;
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}
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result += "(" + this.components.map(
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(comp) => comp.format(format)
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).join((format === FormatTypes.full) ? ", ": ",") + ")";
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} else {
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result += this.type;
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}
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}
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if (format !== FormatTypes.sighash) {
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if (this.indexed === true) { result += " indexed"; }
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if (format === FormatTypes.full && this.name) {
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result += " " + this.name;
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}
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}
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return result;
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}
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static from(value: string | JsonFragmentType | ParamType, allowIndexed?: boolean): ParamType {
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if (typeof(value) === "string") {
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return ParamType.fromString(value, allowIndexed);
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}
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return ParamType.fromObject(value);
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}
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static fromObject(value: JsonFragmentType | ParamType): ParamType {
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if (ParamType.isParamType(value)) { return value; }
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return new ParamType(_constructorGuard, {
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name: (value.name || null),
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type: verifyType(value.type),
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indexed: ((value.indexed == null) ? null: !!value.indexed),
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components: (value.components ? value.components.map(ParamType.fromObject): null)
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});
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}
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static fromString(value: string, allowIndexed?: boolean): ParamType {
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function ParamTypify(node: ParseNode): ParamType {
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return ParamType.fromObject({
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name: node.name,
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type: node.type,
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indexed: node.indexed,
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components: node.components
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});
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}
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return ParamTypify(parseParamType(value, !!allowIndexed));
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}
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static isParamType(value: any): value is ParamType {
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return !!(value != null && value._isParamType);
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}
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};
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function parseParams(value: string, allowIndex: boolean): Array<ParamType> {
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return splitNesting(value).map((param) => ParamType.fromString(param, allowIndex));
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}
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export abstract class Fragment {
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readonly type: string;
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readonly name: string;
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readonly inputs: Array<ParamType>;
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readonly _isFragment: boolean;
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constructor(constructorGuard: any, params: any) {
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if (constructorGuard !== _constructorGuard) { throw new Error("use a static from method"); }
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populate(this, params);
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this._isFragment = true;
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Object.freeze(this);
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}
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abstract format(format?: string): string;
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static from(value: Fragment | JsonFragment | string): Fragment {
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if (Fragment.isFragment(value)) { return value; }
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if (typeof(value) === "string") {
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return Fragment.fromString(value);
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}
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return Fragment.fromObject(value);
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}
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static fromObject(value: Fragment | JsonFragment): Fragment {
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if (Fragment.isFragment(value)) { return value; }
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if (value.type === "function") {
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return FunctionFragment.fromObject(value);
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} else if (value.type === "event") {
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return EventFragment.fromObject(value);
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} else if (value.type === "constructor") {
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return ConstructorFragment.fromObject(value);
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} else if (value.type === "fallback") {
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// @TODO:
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return null;
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}
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return logger.throwArgumentError("invalid fragment object", "value", value);
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}
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static fromString(value: string): Fragment {
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// Make sure the "returns" is surrounded by a space and all whitespace is exactly one space
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value = value.replace(/\s/g, " ");
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value = value.replace(/\(/g, " (").replace(/\)/g, ") ").replace(/\s+/g, " ");
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value = value.trim();
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if (value.split(" ")[0] === "event") {
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return EventFragment.fromString(value.substring(5).trim());
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} else if (value.split(" ")[0] === "function") {
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return FunctionFragment.fromString(value.substring(8).trim());
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} else if (value.split("(")[0].trim() === "constructor") {
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return ConstructorFragment.fromString(value.trim());
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}
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throw new Error("unknown fragment");
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}
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static isFragment(value: any): value is Fragment {
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return !!(value && value._isFragment);
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}
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}
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export class EventFragment extends Fragment {
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readonly anonymous: boolean;
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format(format?: string): string {
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if (!format) { format = FormatTypes.sighash; }
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if (!FormatTypes[format]) {
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logger.throwArgumentError("invalid format type", "format", format);
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}
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if (format === FormatTypes.json) {
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return JSON.stringify({
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type: "event",
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anonymous: this.anonymous,
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name: this.name,
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inputs: this.inputs.map((input) => JSON.parse(input.format(format)))
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});
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}
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let result = "";
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if (format !== FormatTypes.sighash) {
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result += "event ";
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}
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result += this.name + "(" + this.inputs.map(
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(input) => input.format(format)
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).join((format === FormatTypes.full) ? ", ": ",") + ") ";
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if (format !== FormatTypes.sighash) {
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if (this.anonymous) {
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result += "anonymous ";
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}
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}
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return result.trim();
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}
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static from(value: EventFragment | JsonFragment | string): EventFragment {
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if (typeof(value) === "string") {
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return EventFragment.fromString(value);
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}
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return EventFragment.fromObject(value);
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}
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static fromObject(value: JsonFragment | EventFragment): EventFragment {
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if (EventFragment.isEventFragment(value)) { return value; }
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if (value.type !== "event") { throw new Error("invalid event object - " + value.type); }
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return new EventFragment(_constructorGuard, {
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name: verifyIdentifier(value.name),
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anonymous: value.anonymous,
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inputs: (value.inputs ? value.inputs.map(ParamType.fromObject) : []),
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type: "event"
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});
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}
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static fromString(value: string): EventFragment {
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let match = value.match(regexParen);
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if (!match) { throw new Error("invalid event: " + value); }
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let anonymous = false;
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match[3].split(" ").forEach((modifier) => {
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switch(modifier.trim()) {
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case "anonymous":
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anonymous = true;
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break;
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case "":
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break;
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default:
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logger.warn("unknown modifier: " + modifier);
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}
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});
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return EventFragment.fromObject({
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name: match[1].trim(),
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anonymous: anonymous,
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inputs: parseParams(match[2], true),
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type: "event"
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});
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}
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static isEventFragment(value: any): value is EventFragment {
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return (value && value._isFragment && value.type === "event");
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}
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}
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function parseGas(value: string, params: any): string {
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params.gas = null;
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let comps = value.split("@");
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if (comps.length !== 1) {
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if (comps.length > 2) {
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throw new Error("invalid signature");
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}
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if (!comps[1].match(/^[0-9]+$/)) {
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throw new Error("invalid signature gas");
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}
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params.gas = BigNumber.from(comps[1]);
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return comps[0];
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}
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return value;
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}
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function parseModifiers(value: string, params: any): void {
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params.constant = false;
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params.payable = false;
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params.stateMutability = "nonpayable";
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|
value.split(" ").forEach((modifier) => {
|
|
switch (modifier.trim()) {
|
|
case "constant":
|
|
params.constant = true;
|
|
break;
|
|
case "payable":
|
|
params.payable = true;
|
|
params.stateMutability = "payable";
|
|
break;
|
|
case "pure":
|
|
params.constant = true;
|
|
params.stateMutability = "pure";
|
|
break;
|
|
case "view":
|
|
params.constant = true;
|
|
params.stateMutability = "view";
|
|
break;
|
|
case "external":
|
|
case "public":
|
|
case "":
|
|
break;
|
|
default:
|
|
console.log("unknown modifier: " + modifier);
|
|
}
|
|
});
|
|
}
|
|
|
|
function verifyState(value: any): { constant: boolean, payable: boolean, stateMutability: string } {
|
|
let result: any = {
|
|
constant: false,
|
|
payable: true,
|
|
stateMutability: "payable"
|
|
};
|
|
|
|
if (value.stateMutability != null) {
|
|
result.stateMutability = value.stateMutability;
|
|
|
|
result.constant = (result.stateMutability === "view" || result.stateMutability === "pure");
|
|
if (value.constant != null) {
|
|
if ((!!value.constant) !== result.constant) {
|
|
throw new Error("cannot have constant function with mutability " + result.stateMutability);
|
|
}
|
|
}
|
|
|
|
result.payable = (result.stateMutability === "payable");
|
|
if (value.payable != null) {
|
|
if ((!!value.payable) !== result.payable) {
|
|
throw new Error("cannot have payable function with mutability " + result.stateMutability);
|
|
}
|
|
}
|
|
|
|
} else if (value.payable != null) {
|
|
result.payable = !!value.payable;
|
|
result.stateMutability = (result.payable ? "payable": "nonpayable");
|
|
result.constant = !result.payable;
|
|
if (value.constant != null && (value.constant !== result.constant)) {
|
|
throw new Error("cannot have constant payable function");
|
|
}
|
|
|
|
} else if (value.constant != null) {
|
|
result.constant = !!value.constant;
|
|
result.payable = !result.constant;
|
|
result.stateMutability = (result.constant ? "view": "payable");
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
export class ConstructorFragment extends Fragment {
|
|
stateMutability: string;
|
|
payable: boolean;
|
|
gas?: BigNumber;
|
|
|
|
format(format?: string): string {
|
|
if (!format) { format = FormatTypes.sighash; }
|
|
if (!FormatTypes[format]) {
|
|
logger.throwArgumentError("invalid format type", "format", format);
|
|
}
|
|
|
|
if (format === FormatTypes.json) {
|
|
return JSON.stringify({
|
|
type: "constructor",
|
|
stateMutability: ((this.stateMutability !== "nonpayable") ? this.stateMutability: undefined),
|
|
payble: this.payable,
|
|
gas: (this.gas ? this.gas.toNumber(): undefined),
|
|
inputs: this.inputs.map((input) => JSON.parse(input.format(format)))
|
|
});
|
|
}
|
|
|
|
if (format === FormatTypes.sighash) {
|
|
logger.throwError("cannot format a constructor for sighash", Logger.errors.UNSUPPORTED_OPERATION, {
|
|
operation: "format(sighash)"
|
|
});
|
|
}
|
|
|
|
let result = "constructor(" + this.inputs.map(
|
|
(input) => input.format(format)
|
|
).join((format === FormatTypes.full) ? ", ": ",") + ") ";
|
|
|
|
if (this.stateMutability && this.stateMutability !== "nonpayable") {
|
|
result += this.stateMutability + " ";
|
|
}
|
|
|
|
return result.trim();
|
|
}
|
|
|
|
static from(value: ConstructorFragment | JsonFragment | string): ConstructorFragment {
|
|
if (typeof(value) === "string") {
|
|
return ConstructorFragment.fromString(value);
|
|
}
|
|
return ConstructorFragment.fromObject(value);
|
|
}
|
|
|
|
static fromObject(value: ConstructorFragment | JsonFragment): ConstructorFragment {
|
|
if (ConstructorFragment.isConstructorFragment(value)) { return value; }
|
|
|
|
if (value.type !== "constructor") { throw new Error("invalid constructor object - " + value.type); }
|
|
|
|
let state = verifyState(value);
|
|
if (state.constant) {
|
|
throw new Error("constructor cannot be constant");
|
|
}
|
|
|
|
return new ConstructorFragment(_constructorGuard, {
|
|
name: null,
|
|
type: value.type,
|
|
inputs: (value.inputs ? value.inputs.map(ParamType.fromObject): []),
|
|
payable: state.payable,
|
|
gas: (value.gas ? BigNumber.from(value.gas): null)
|
|
});
|
|
}
|
|
|
|
static fromString(value: string): ConstructorFragment {
|
|
let params: any = { type: "constructor" };
|
|
|
|
value = parseGas(value, params);
|
|
|
|
let parens = value.match(regexParen);
|
|
if (!parens) { throw new Error("invalid constructor: " + value); }
|
|
|
|
if (parens[1].trim() !== "constructor") { throw new Error("invalid constructor"); }
|
|
|
|
params.inputs = parseParams(parens[2].trim(), false);
|
|
|
|
parseModifiers(parens[3].trim(), params);
|
|
|
|
return ConstructorFragment.fromObject(params);
|
|
}
|
|
|
|
static isConstructorFragment(value: any): value is ConstructorFragment {
|
|
return (value && value._isFragment && value.type === "constructor");
|
|
}
|
|
}
|
|
|
|
export class FunctionFragment extends ConstructorFragment {
|
|
constant: boolean;
|
|
outputs?: Array<ParamType>;
|
|
|
|
format(format?: string): string {
|
|
if (!format) { format = FormatTypes.sighash; }
|
|
if (!FormatTypes[format]) {
|
|
logger.throwArgumentError("invalid format type", "format", format);
|
|
}
|
|
|
|
if (format === FormatTypes.json) {
|
|
return JSON.stringify({
|
|
type: "function",
|
|
name: this.name,
|
|
constant: this.constant,
|
|
stateMutability: ((this.stateMutability !== "nonpayable") ? this.stateMutability: undefined),
|
|
payble: this.payable,
|
|
gas: (this.gas ? this.gas.toNumber(): undefined),
|
|
inputs: this.inputs.map((input) => JSON.parse(input.format(format))),
|
|
ouputs: this.outputs.map((output) => JSON.parse(output.format(format))),
|
|
});
|
|
}
|
|
|
|
let result = "";
|
|
|
|
if (format !== FormatTypes.sighash) {
|
|
result += "function ";
|
|
}
|
|
|
|
result += this.name + "(" + this.inputs.map(
|
|
(input) => input.format(format)
|
|
).join((format === FormatTypes.full) ? ", ": ",") + ") ";
|
|
|
|
if (format !== FormatTypes.sighash) {
|
|
if (this.stateMutability) {
|
|
if (this.stateMutability !== "nonpayable") {
|
|
result += (this.stateMutability + " ");
|
|
}
|
|
} else if (this.constant) {
|
|
result += "view ";
|
|
}
|
|
|
|
if (this.outputs && this.outputs.length) {
|
|
result += "returns (" + this.outputs.map(
|
|
(output) => output.format(format)
|
|
).join(", ") + ") ";
|
|
}
|
|
|
|
if (this.gas != null) {
|
|
result += "@" + this.gas.toString() + " ";
|
|
}
|
|
}
|
|
|
|
return result.trim();
|
|
}
|
|
|
|
static from(value: FunctionFragment | JsonFragment | string): FunctionFragment {
|
|
if (typeof(value) === "string") {
|
|
return FunctionFragment.fromString(value);
|
|
}
|
|
return FunctionFragment.fromObject(value);
|
|
}
|
|
|
|
static fromObject(value: FunctionFragment | JsonFragment): FunctionFragment {
|
|
if (FunctionFragment.isFunctionFragment(value)) { return value; }
|
|
|
|
if (value.type !== "function") { throw new Error("invalid function object - " + value.type); }
|
|
|
|
let state = verifyState(value);
|
|
|
|
return new FunctionFragment(_constructorGuard, {
|
|
type: value.type,
|
|
name: verifyIdentifier(value.name),
|
|
constant: state.constant,
|
|
inputs: (value.inputs ? value.inputs.map(ParamType.fromObject): []),
|
|
outputs: (value.outputs ? value.outputs.map(ParamType.fromObject): [ ]),
|
|
payable: state.payable,
|
|
stateMutability: state.stateMutability,
|
|
gas: (value.gas ? BigNumber.from(value.gas): null)
|
|
});
|
|
}
|
|
|
|
static fromString(value: string): FunctionFragment {
|
|
let params: any = { type: "function" };
|
|
value = parseGas(value, params);
|
|
|
|
let comps = value.split(" returns ");
|
|
if (comps.length > 2) { throw new Error("invalid function"); }
|
|
|
|
let parens = comps[0].match(regexParen);
|
|
if (!parens) { throw new Error("invalid signature"); }
|
|
|
|
params.name = parens[1].trim();
|
|
if (!params.name.match(regexIdentifier)) {
|
|
throw new Error("invalid identifier: '" + params.name + "'");
|
|
}
|
|
|
|
params.inputs = parseParams(parens[2], false);
|
|
|
|
parseModifiers(parens[3].trim(), params);
|
|
|
|
// We have outputs
|
|
if (comps.length > 1) {
|
|
let returns = comps[1].match(regexParen);
|
|
if (returns[1].trim() != "" || returns[3].trim() != "") {
|
|
throw new Error("unexpected tokens");
|
|
}
|
|
params.outputs = parseParams(returns[2], false);
|
|
} else {
|
|
params.outputs = [ ];
|
|
}
|
|
|
|
return FunctionFragment.fromObject(params);
|
|
}
|
|
|
|
static isFunctionFragment(value: any): value is FunctionFragment {
|
|
return (value && value._isFragment && value.type === "function");
|
|
}
|
|
}
|
|
|
|
//export class ErrorFragment extends Fragment {
|
|
//}
|
|
|
|
//export class StructFragment extends Fragment {
|
|
//}
|
|
|
|
function verifyType(type: string): string {
|
|
|
|
// These need to be transformed to their full description
|
|
if (type.match(/^uint($|[^1-9])/)) {
|
|
type = "uint256" + type.substring(4);
|
|
} else if (type.match(/^int($|[^1-9])/)) {
|
|
type = "int256" + type.substring(3);
|
|
}
|
|
|
|
// @TODO: more verification
|
|
|
|
return type;
|
|
}
|
|
|
|
const regexIdentifier = new RegExp("^[A-Za-z_][A-Za-z0-9_]*$");
|
|
function verifyIdentifier(value: string): string {
|
|
if (!value || !value.match(regexIdentifier)) {
|
|
throw new Error("invalid identifier: '" + value + "'");
|
|
}
|
|
return value;
|
|
}
|
|
|
|
const regexParen = new RegExp("^([^)(]*)\\((.*)\\)([^)(]*)$");
|
|
|
|
function splitNesting(value: string): Array<any> {
|
|
value = value.trim();
|
|
|
|
let result = [];
|
|
let accum = "";
|
|
let depth = 0;
|
|
for (let offset = 0; offset < value.length; offset++) {
|
|
let c = value[offset];
|
|
if (c === "," && depth === 0) {
|
|
result.push(accum);
|
|
accum = "";
|
|
} else {
|
|
accum += c;
|
|
if (c === "(") {
|
|
depth++;
|
|
} else if (c === ")") {
|
|
depth--;
|
|
if (depth === -1) {
|
|
throw new Error("unbalanced parenthsis");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (accum) { result.push(accum); }
|
|
|
|
return result;
|
|
}
|
|
|