@glimmer/runtime/dist/commonjs/es2017/lib/compiled/opcodes/lists.js

Minimal runtime needed to render Glimmer templates

"use strict";

var _reference = require("@glimmer/reference");

var _opcodes = require("../../opcodes");

var _vm = require("./vm");

_opcodes.APPEND_OPCODES.add(72
/* EnterList */
, (vm, {
  op1: relativeStart,
  op2: elseTarget
}) => {
  let stack = vm.stack;
  let listRef = stack.pop();
  let keyRef = stack.pop();
  let keyValue = (0, _reference.valueForRef)(keyRef);
  let key = keyValue === null ? '@identity' : String(keyValue);
  let iteratorRef = (0, _reference.createIteratorRef)(listRef, key);
  let iterator = (0, _reference.valueForRef)(iteratorRef);
  vm.updateWith(new _vm.AssertFilter(iteratorRef, iterator => iterator.isEmpty()));

  if (iterator.isEmpty() === true) {
    // TODO: Fix this offset, should be accurate
    vm.goto(elseTarget + 1);
  } else {
    vm.enterList(iteratorRef, relativeStart);
    vm.stack.push(iterator);
  }
});

_opcodes.APPEND_OPCODES.add(73
/* ExitList */
, vm => {
  vm.exitList();
});

_opcodes.APPEND_OPCODES.add(74
/* Iterate */
, (vm, {
  op1: breaks
}) => {
  let stack = vm.stack;
  let iterator = stack.peek();
  let item = iterator.next();

  if (item !== null) {
    vm.registerItem(vm.enterItem(item));
  } else {
    vm.goto(breaks);
  }
});
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