@glimmer/runtime/dist/modules/es5/lib/vm/stack.js

Minimal runtime needed to render Glimmer templates

import { $fp, $sp } from '@glimmer/vm';
import { REGISTERS } from '../symbols';
import { initializeRegistersWithSP } from './low-level';

var EvaluationStackImpl = /*#__PURE__*/function () {
  // fp -> sp
  function EvaluationStackImpl(stack, registers) {
    if (stack === void 0) {
      stack = [];
    }

    this.stack = stack;
    this[REGISTERS] = registers;

    if (false
    /* LOCAL_DEBUG */
    ) {
        Object.seal(this);
      }
  }

  EvaluationStackImpl.restore = function restore(snapshot) {
    return new this(snapshot.slice(), initializeRegistersWithSP(snapshot.length - 1));
  };

  var _proto = EvaluationStackImpl.prototype;

  _proto.push = function push(value) {
    this.stack[++this[REGISTERS][$sp]] = value;
  };

  _proto.dup = function dup(position) {
    if (position === void 0) {
      position = this[REGISTERS][$sp];
    }

    this.stack[++this[REGISTERS][$sp]] = this.stack[position];
  };

  _proto.copy = function copy(from, to) {
    this.stack[to] = this.stack[from];
  };

  _proto.pop = function pop(n) {
    if (n === void 0) {
      n = 1;
    }

    var top = this.stack[this[REGISTERS][$sp]];
    this[REGISTERS][$sp] -= n;
    return top;
  };

  _proto.peek = function peek(offset) {
    if (offset === void 0) {
      offset = 0;
    }

    return this.stack[this[REGISTERS][$sp] - offset];
  };

  _proto.get = function get(offset, base) {
    if (base === void 0) {
      base = this[REGISTERS][$fp];
    }

    return this.stack[base + offset];
  };

  _proto.set = function set(value, offset, base) {
    if (base === void 0) {
      base = this[REGISTERS][$fp];
    }

    this.stack[base + offset] = value;
  };

  _proto.slice = function slice(start, end) {
    return this.stack.slice(start, end);
  };

  _proto.capture = function capture(items) {
    var end = this[REGISTERS][$sp] + 1;
    var start = end - items;
    return this.stack.slice(start, end);
  };

  _proto.reset = function reset() {
    this.stack.length = 0;
  };

  _proto.toArray = function toArray() {
    return this.stack.slice(this[REGISTERS][$fp], this[REGISTERS][$sp] + 1);
  };

  return EvaluationStackImpl;
}();

export { EvaluationStackImpl as default };
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U11bJHNwXV0gYXMgVDtcbiAgICB0aGlzW1JFR0lTVEVSU11bJHNwXSAtPSBuO1xuICAgIHJldHVybiB0b3A7XG4gIH1cblxuICBwZWVrPFQ+KG9mZnNldCA9IDApOiBUIHtcbiAgICByZXR1cm4gdGhpcy5zdGFja1t0aGlzW1JFR0lTVEVSU11bJHNwXSAtIG9mZnNldF0gYXMgVDtcbiAgfVxuXG4gIGdldDxUPihvZmZzZXQ6IG51bWJlciwgYmFzZSA9IHRoaXNbUkVHSVNURVJTXVskZnBdKTogVCB7XG4gICAgcmV0dXJuIHRoaXMuc3RhY2tbYmFzZSArIG9mZnNldF0gYXMgVDtcbiAgfVxuXG4gIHNldCh2YWx1ZTogdW5rbm93biwgb2Zmc2V0OiBudW1iZXIsIGJhc2UgPSB0aGlzW1JFR0lTVEVSU11bJGZwXSkge1xuICAgIHRoaXMuc3RhY2tbYmFzZSArIG9mZnNldF0gPSB2YWx1ZTtcbiAgfVxuXG4gIHNsaWNlPFQgPSB1bmtub3duPihzdGFydDogbnVtYmVyLCBlbmQ6IG51bWJlcik6IFRbXSB7XG4gICAgcmV0dXJuIHRoaXMuc3RhY2suc2xpY2Uoc3RhcnQsIGVuZCkgYXMgVFtdO1xuICB9XG5cbiAgY2FwdHVyZShpdGVtczogbnVtYmVyKTogdW5rbm93bltdIHtcbiAgICBsZXQgZW5kID0gdGhpc1tSRUdJU1RFUlNdWyRzcF0gKyAxO1xuICAgIGxldCBzdGFydCA9IGVuZCAtIGl0ZW1zO1xuICAgIHJldHVybiB0aGlzLnN0YWNrLnNsaWNlKHN0YXJ0LCBlbmQpO1xuICB9XG5cbiAgcmVzZXQoKSB7XG4gICAgdGhpcy5zdGFjay5sZW5ndGggPSAwO1xuICB9XG5cbiAgdG9BcnJheSgpIHtcbiAgICByZXR1cm4gdGhpcy5zdGFjay5zbGljZSh0aGlzW1JFR0lTVEVSU11bJGZwXSwgdGhpc1tSRUdJU1RFUlNdWyRzcF0gKyAxKTtcbiAgfVxufVxuIl0sInNvdXJjZVJvb3QiOiIifQ==