Add basic support for EcmaScript classes

Most of the class creation is done inside the runtime
in the CreateClass method. Added a corresponding
instruction to the interpreter and jit.

The compiled data now contains an array of classes
containing the compile time generated layout of the class.

Currently, classes without an explicit constructor and
classes with inheritance are not supported.

Done-with: Yulong Bai <yulong.bai@qt.io>
Change-Id: I0185dcc1e3b0b8f44deff74e44a8262fc646aa9e
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/qml/jsruntime/qv4functionobject.cpp b/src/qml/jsruntime/qv4functionobject.cpp
index a9aaa344cb..7fcb1c3536 100644
--- a/src/qml/jsruntime/qv4functionobject.cpp
+++ b/src/qml/jsruntime/qv4functionobject.cpp
@@ -179,6 +179,11 @@ Heap::FunctionObject *FunctionObject::createScriptFunction(ExecutionContext *sco
     return scope->engine()->memoryManager->allocate<ScriptFunction>(scope, function);
 }
 
+Heap::FunctionObject *FunctionObject::createConstructorFunction(ExecutionContext *scope, Function *function)
+{
+    return scope->engine()->memoryManager->allocate<ConstructorFunction>(scope, function);
+}
+
 Heap::FunctionObject *FunctionObject::createBuiltinFunction(ExecutionEngine *engine, StringOrSymbol *nameOrSymbol, jsCallFunction code, int argumentCount)
 {
     Scope scope(engine);
@@ -490,6 +495,13 @@ Heap::InternalClass *ScriptFunction::classForConstructor() const
     return ic->d();
 }
 
+DEFINE_OBJECT_VTABLE(ConstructorFunction);
+
+ReturnedValue ConstructorFunction::call(const FunctionObject *f, const Value *, const Value *, int)
+{
+    return f->engine()->throwTypeError(QStringLiteral("Cannot call a class constructor without |new|"));
+}
+
 DEFINE_OBJECT_VTABLE(IndexedBuiltinFunction);
 
 DEFINE_OBJECT_VTABLE(BoundFunction);