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import { Token, TokenType } from "./Token"
interface Identifiers<T> {
[Key: string]: T;
}
/**
* @class Parser
* @name Parser
*/
export class Parser {
tokens: Generator<Token>
identifiers: Identifiers<string> = {}
* Initialize a parser from a token generator.
constructor(tokens: Generator<Token>) {
this.tokens = tokens
* Evaluate the result.
evaluate(): bigint {
let n = 0n
for(const x of this.tokens) {
if (x.type === TokenType.identifier) {
if (!(x.s in this.identifiers)) {
throw `"${x.s}" is undefined`
n += BigInt(this.identifiers[x.s])
// else if (x.type === TokenType.separator) {
// }
// else if (x.type === TokenType.operator) {
// if (x.s === '=') {
else if (x.type === TokenType.literal) {
n += BigInt(x.s)
return n
* The text representation.
toString(): string {
return this.evaluate().toString()
export default Parser
acerix /
cnum
