internal override void EmitUnset(CodeGenerator/*!*/ codeGenerator, IPlace/*!*/ instance,
ConstructedType constructedType, bool runtimeVisibilityCheck)
{
ILEmitter il = codeGenerator.IL;
if (IsStatic)
{
// emit error (whether or not the property is visible):
il.Emit(OpCodes.Ldstr, DeclaringType.FullName);
il.Emit(OpCodes.Ldstr, this.FullName);
codeGenerator.EmitPhpException(Methods.PhpException.StaticPropertyUnset);
return;
}
// replace the field with a new PhpSmartReference with IsSet false
instance.EmitLoad(il);
il.Emit(OpCodes.Newobj, Constructors.PhpSmartReference.Void);
il.Emit(OpCodes.Dup);
il.LoadBool(false);
il.Emit(OpCodes.Callvirt, Properties.PhpReference_IsSet.GetSetMethod());
il.Emit(OpCodes.Stfld, DType.MakeConstructed(RealField, constructedType));
}
internal override void EmitUnset(CodeGenerator/*!*/ codeGenerator, IPlace/*!*/ instance, ConstructedType constructedType, bool runtimeVisibilityCheck)
{
ILEmitter il = codeGenerator.IL;
if (IsStatic)
{
// emit error (whether or not the property is visible):
il.Emit(OpCodes.Ldstr, DeclaringType.FullName);
il.Emit(OpCodes.Ldstr, this.FullName);
codeGenerator.EmitPhpException(Methods.PhpException.StaticPropertyUnset);
return;
}
throw new NotImplementedException();
}
/// <author>Tomas Matousek</author>
/// <remarks>
/// Emits the following code:
/// <code>
/// IPhpEnumerable enumerable = ARRAY as IPhpEnumerable;
/// if (enumerable==null)
/// {
/// PhpException.InvalidForeachArgument();
/// }
/// else
/// FOREACH_BEGIN:
/// {
/// IDictionaryEnumerator enumerator = enumerable.GetForeachEnumerator(KEYED,ALIASED,TYPE_HANDLE);
///
/// goto LOOP_TEST;
/// LOOP_BEGIN:
/// {
/// ASSIGN(value,enumerator.Value);
/// ASSIGN(key,enumerator.Key);
///
/// BODY;
/// }
/// LOOP_TEST:
/// if (enumerator.MoveNext()) goto LOOP_BEGIN;
/// }
/// FOREACH_END:
/// </code>
/// </remarks>
/// <include file='Doc/Nodes.xml' path='doc/method[@name="Emit"]/*'/>
internal override void Emit(CodeGenerator codeGenerator)
{
Statistics.AST.AddNode("Loop.Foreach");
ILEmitter il = codeGenerator.IL;
Label foreach_end = il.DefineLabel();
Label foreach_begin = il.DefineLabel();
Label loop_begin = il.DefineLabel();
Label loop_test = il.DefineLabel();
codeGenerator.BranchingStack.BeginLoop(loop_test, foreach_end,
codeGenerator.ExceptionBlockNestingLevel);
LocalBuilder enumerable = il.GetTemporaryLocal(typeof(IPhpEnumerable));
// marks foreach "header" (the first part of the IL code):
codeGenerator.MarkSequencePoint(
enumeree.Position.FirstLine,
enumeree.Position.FirstColumn,
valueVariable.Position.LastLine,
valueVariable.Position.LastColumn + 1);
// enumerable = array as IPhpEnumerable;
enumeree.Emit(codeGenerator);
il.Emit(OpCodes.Isinst, typeof(IPhpEnumerable));
il.Stloc(enumerable);
// if (enumerable==null)
il.Ldloc(enumerable);
il.Emit(OpCodes.Brtrue, foreach_begin);
{
// CALL PhpException.InvalidForeachArgument();
codeGenerator.EmitPhpException(Methods.PhpException.InvalidForeachArgument);
il.Emit(OpCodes.Br, foreach_end);
}
// FOREACH_BEGIN:
il.MarkLabel(foreach_begin);
{
LocalBuilder enumerator = il.GetTemporaryLocal(typeof(System.Collections.IDictionaryEnumerator));
// enumerator = enumerable.GetForeachEnumerator(KEYED,ALIASED,TYPE_HANDLE);
il.Ldloc(enumerable);
il.LoadBool(keyVariable != null);
il.LoadBool(valueVariable.Alias);
codeGenerator.EmitLoadClassContext();
il.Emit(OpCodes.Callvirt, Methods.IPhpEnumerable_GetForeachEnumerator);
il.Stloc(enumerator);
// goto LOOP_TEST;
il.Emit(OpCodes.Br, loop_test);
// LOOP_BEGIN:
il.MarkLabel(loop_begin);
{
// enumerator should do dereferencing and deep copying (if applicable):
// ASSIGN(value,enumerator.Value);
valueVariable.Emit(codeGenerator);
il.Ldloc(enumerator);
il.Emit(OpCodes.Callvirt, Properties.IDictionaryEnumerator_Value.GetGetMethod());
if (valueVariable.Alias) il.Emit(OpCodes.Castclass, typeof(PhpReference));
valueVariable.EmitAssign(codeGenerator);
if (keyVariable != null)
{
// enumerator should do dereferencing and deep copying (if applicable):
// ASSIGN(key,enumerator.Key);
keyVariable.Emit(codeGenerator);
il.Ldloc(enumerator);
il.Emit(OpCodes.Callvirt, Properties.IDictionaryEnumerator_Key.GetGetMethod());
keyVariable.EmitAssign(codeGenerator);
}
// BODY:
body.Emit(codeGenerator);
}
// LOOP_TEST:
il.MarkLabel(loop_test);
// marks foreach "header" (the second part of the code):
codeGenerator.MarkSequencePoint(
enumeree.Position.FirstLine,
enumeree.Position.FirstColumn,
valueVariable.Position.LastLine,
valueVariable.Position.LastColumn + 1);
// if (enumerator.MoveNext()) goto LOOP_BEGIN;
il.Ldloc(enumerator);
il.Emit(OpCodes.Callvirt, Methods.IEnumerator_MoveNext);
il.Emit(OpCodes.Brtrue, loop_begin);
//
il.ReturnTemporaryLocal(enumerator);
}
// FOREACH_END:
il.MarkLabel(foreach_end);
il.ReturnTemporaryLocal(enumerable);
codeGenerator.BranchingStack.EndLoop();
il.ForgetLabel(foreach_end);
il.ForgetLabel(foreach_begin);
il.ForgetLabel(loop_begin);
il.ForgetLabel(loop_test);
}