cbon/dist/es/state_machine.mjs

Common Bracket Object Notation

import { isVoid } from "./utils";
import { TkPos, TkRange } from "./pos";
export const ReDo = Symbol('ReDo');
export class WhenError extends Error {
    constructor(err) {
        super();
        this.err = err;
    }
}
export class State {
    constructor(show_all_err) {
        this.count = 0;
        this.char = 0;
        this.line = 0;
        this.states = [];
        this.lines = [];
        this.errors = [];
        this.queue = [];
        this.show_all_err = show_all_err;
    }
    push(unit) {
        this.states.push(unit);
    }
    pop() {
        return this.states.pop();
    }
    call(c) {
        const r = this.states[this.states.length - 1](c);
        if (!isVoid(r)) {
            if (r === ReDo) {
                this.queue.push(() => this.call(c));
            }
            else {
                const { fn, ignoreFirst } = r;
                this.push(fn);
                if (!ignoreFirst)
                    this.queue.push(() => this.call(c));
            }
        }
    }
    get pos() {
        return new TkPos(this.count, this.char, this.line);
    }
    get lastPos() {
        const np = new TkPos(this.count, this.char, this.line);
        np.count--;
        if (np.char === 0) {
            np.line--;
            np.char = this.lines[np.line];
        }
        else
            np.char--;
        return np;
    }
}
export class Context {
    constructor(state) {
        this.state = state;
    }
    end() {
        this.state.pop();
    }
    call(f, ...p) {
        return {
            fn: f(new Context(this.state), ...p),
            ignoreFirst: false
        };
    }
    callNoFirst(f, ...p) {
        return {
            fn: f(new Context(this.state), ...p),
            ignoreFirst: true
        };
    }
    flag() {
        this.last_flag = this.state.pos;
    }
    range(last = false) {
        var _a;
        const n = last ? this.state.lastPos : this.state.pos;
        return new TkRange((_a = this.last_flag, (_a !== null && _a !== void 0 ? _a : n)), n);
    }
    error(range, msg) {
        if (!this.state.show_all_err)
            throw new WhenError({ range, msg });
        this.state.errors.push({ range, msg });
    }
}