summaryrefslogtreecommitdiffstats
path: root/js/src/tests/test262/language/statements/generators/params-dflt-ref-arguments.js
diff options
context:
space:
mode:
Diffstat (limited to 'js/src/tests/test262/language/statements/generators/params-dflt-ref-arguments.js')
-rw-r--r--js/src/tests/test262/language/statements/generators/params-dflt-ref-arguments.js62
1 files changed, 62 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/generators/params-dflt-ref-arguments.js b/js/src/tests/test262/language/statements/generators/params-dflt-ref-arguments.js
new file mode 100644
index 0000000000..bc73a87f35
--- /dev/null
+++ b/js/src/tests/test262/language/statements/generators/params-dflt-ref-arguments.js
@@ -0,0 +1,62 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: Referencing the arguments object from a default parameter (generator function declaration)
+esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject
+es6id: 14.4.12
+features: [generators, default-parameters]
+info: |
+ GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
+
+ [...]
+ 2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
+ GeneratorBody, scope, strict).
+ [...]
+
+ 9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+ [...]
+ 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+ [...]
+
+ 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+ 1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+ [...]
+
+ 9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+ [...]
+ 23. Let iteratorRecord be Record {[[iterator]]:
+ CreateListIterator(argumentsList), [[done]]: false}.
+ 24. If hasDuplicates is true, then
+ [...]
+ 25. Else,
+ b. Let formalStatus be IteratorBindingInitialization for formals with
+ iteratorRecord and env as arguments.
+ [...]
+
+ 14.1.19 Runtime Semantics: IteratorBindingInitialization
+
+ FormalsList : FormalsList , FormalParameter
+
+ 1. Let status be the result of performing IteratorBindingInitialization for
+ FormalsList using iteratorRecord and environment as the arguments.
+ 2. ReturnIfAbrupt(status).
+ 3. Return the result of performing IteratorBindingInitialization for
+ FormalParameter using iteratorRecord and environment as the arguments.
+---*/
+
+var callCount = 0;
+function* f(x = arguments[2], y = arguments[3], z) {
+ assert.sameValue(x, 'third', 'first parameter');
+ assert.sameValue(y, 'fourth', 'second parameter');
+ assert.sameValue(z, 'third', 'third parameter');
+ callCount = callCount + 1;
+}
+
+f(undefined, undefined, 'third', 'fourth').next();
+
+assert.sameValue(callCount, 1, 'generator function invoked exactly once');
+
+reportCompare(0, 0);