Source code
Revision control
Copy as Markdown
Other Tools
// This file was procedurally generated from the following sources:
// - src/compound-assignment-private/add.case
// - src/compound-assignment-private/default/data-property.template
/*---
description: Compound addition assignment with target being a private reference (to a field)
esid: sec-assignment-operators-runtime-semantics-evaluation
features: [class-fields-private]
flags: [generated]
info: |
sec-assignment-operators-runtime-semantics-evaluation
AssignmentExpression : LeftHandSideExpression AssignmentOperator AssignmentExpression
1. Let _lref_ be the result of evaluating |LeftHandSideExpression|.
2. Let _lval_ be ? GetValue(_lref_).
...
7. Let _r_ be ApplyStringOrNumericBinaryOperator(_lval_, _opText_, _rval_).
8. Perform ? PutValue(_lref_, _r_).
9. Return _r_.
sec-property-accessors-runtime-semantics-evaluation
MemberExpression : MemberExpression `.` PrivateIdentifier
1. Let _baseReference_ be the result of evaluating |MemberExpression|.
2. Let _baseValue_ be ? GetValue(_baseReference_).
3. Let _fieldNameString_ be the StringValue of |PrivateIdentifier|.
4. Return ! MakePrivateReference(_baseValue_, _fieldNameString_).
PutValue (V, W)
...
5.b. If IsPrivateReference(_V_) is *true*, then
i. Return ? PrivateSet(_baseObj_, _V_.[[ReferencedName]], _W_).
PrivateSet (O, P, value)
...
3. If _entry_.[[Kind]] is ~field~, then
a. Set _entry_.[[Value]] to _value_.
---*/
class C {
#field = 1;
compoundAssignment() {
return this.#field += 2;
}
fieldValue() {
return this.#field;
}
}
const o = new C();
assert.sameValue(o.compoundAssignment(), 3, "The expression should evaluate to the result");
assert.sameValue(o.fieldValue(), 3, "PutValue should store the result in the private reference");
reportCompare(0, 0);