@glimmer/runtime
Version:
Minimal runtime needed to render Glimmer templates
47 lines (45 loc) • 5.03 kB
JavaScript
import { createIteratorRef, valueForRef } from '@glimmer/reference';
import { APPEND_OPCODES } from '../../opcodes';
import { AssertFilter } from './vm';
APPEND_OPCODES.add(72
/* EnterList */
, (vm, {
op1: relativeStart,
op2: elseTarget
}) => {
let stack = vm.stack;
let listRef = stack.pop();
let keyRef = stack.pop();
let keyValue = valueForRef(keyRef);
let key = keyValue === null ? '@identity' : String(keyValue);
let iteratorRef = createIteratorRef(listRef, key);
let iterator = valueForRef(iteratorRef);
vm.updateWith(new 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);
}
});
APPEND_OPCODES.add(73
/* ExitList */
, vm => {
vm.exitList();
});
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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