/// <summary>
/// Emit call of the instance/static method. This defines the call site and call it using given parameters.
/// </summary>
/// <param name="cg">Current code <see cref="CodeGenerator"/>.</param>
/// <param name="returnType">Return type of the method call determined by current access of the method call.</param>
/// <param name="targetExpr">The method call instance expression (the target) if it is an instance method call.</param>
/// <param name="targetType">The target type if it is a static method call.</param>
/// <param name="methodFullName">If known at compile time, the method name. Otherwise <c>null</c>.</param>
/// <param name="methodNameExpr">If the <paramref name="methodFullName"/> is null, this will be the expression giving the method name in run time.</param>
/// <param name="callSignature">The call signature of the method call.</param>
/// <returns>The resulting value type code. This value will be pushed onto the evaluation stack.</returns>
public PhpTypeCode EmitMethodCall(
PHP.Core.CodeGenerator /*!*/ cg, Type returnType,
Expression /*!*/ targetExpr, DType /*!*/ targetType,
string methodFullName, Expression methodNameExpr, CallSignature callSignature)
{
Debug.Assert(methodFullName != null ^ methodNameExpr != null);
//
bool staticCall = (targetExpr == null); // we are going to emit static method call
//bool methodNameIsKnown = (methodFullName != null);
//bool classContextIsKnown = (this.classContextPlace != null);
//
// define the call site:
//
var delegateType = /*System.Linq.Expressions.Expression.*/ delegateBuilder.GetDelegateType(
MethodCallDelegateTypeArgs(
callSignature,
staticCall ? Types.DObject[0] : Types.Object[0],
MethodCallDelegateAdditionalArguments(staticCall, methodFullName != null, this.classContextPlace != null),
returnType),
callSitesCount); // (J) do not create dynamic delegates in dynamic modules, so they can be referenced from non-transient assemblies
//
var field = DefineCallSite(cg.IL, string.Format("call_{0}", methodFullName ?? "$"), delegateType, (il) =>
{
// <LOAD> Binder.{MethodCall|StaticMethodCall}( methodFullName, genericParamsCount, paramsCount, classContext, <returnType> )
if (methodFullName != null)
{
il.Emit(OpCodes.Ldstr, methodFullName);
}
else
{
il.Emit(OpCodes.Ldnull);
}
il.LdcI4(callSignature.GenericParams.Count);
il.LdcI4(callSignature.Parameters.Count);
if (this.classContextPlace != null)
{
this.classContextPlace.EmitLoad(il);
}
else
{
il.Emit(OpCodes.Ldsfld, Fields.UnknownTypeDesc.Singleton);
}
il.Emit(OpCodes.Ldtoken, returnType);
il.Emit(OpCodes.Call, Methods.GetTypeFromHandle);
il.Emit(OpCodes.Call, staticCall ? Methods.Binder.StaticMethodCall : Methods.Binder.MethodCall);
});
//
// call the CallSite:
//
// <field>.Target( <field>, <targetExpr|self>, <scriptContext>, <callSignature.EmitLoadOnEvalStack>, <targetType>?, (classContext)?, <methodNameExpr>? ):
cg.IL.Emit(OpCodes.Ldsfld, field);
cg.IL.Emit(OpCodes.Ldfld, field.FieldType.GetField("Target"));
cg.IL.Emit(OpCodes.Ldsfld, field);
if (staticCall)
{
cg.EmitLoadSelf();
}
else
{
EmitMethodTargetExpr(cg, targetExpr);
}
cg.EmitLoadScriptContext();
EmitMethodCallParameters(cg, callSignature);
if (staticCall)
{
targetType.EmitLoadTypeDesc(cg, ResolveTypeFlags.UseAutoload | ResolveTypeFlags.ThrowErrors);
}
if (/*!classContextIsKnown*/ this.classContextPlace == null)
{
cg.EmitLoadClassContext();
}
if (/*!methodNameIsKnown*/ methodFullName == null)
{
cg.EmitName(methodFullName /*null*/, methodNameExpr, true);
}
cg.MarkTransientSequencePoint();
cg.IL.Emit(OpCodes.Callvirt, delegateType.GetMethod("Invoke"));
cg.MarkTransientSequencePoint();
//
return(PhpTypeCodeEnum.FromType(returnType));
}
/// <summary>
/// Create and call <see cref="CallSite"/> for getting property.
/// </summary>
/// <param name="cg"><see cref="CodeGenerator"/>.</param>
/// <param name="wantRef">Wheter <see cref="PhpReference"/> is expected as the result.</param>
/// <param name="targetExpr">The expression representing the target (object).</param>
/// <param name="targetObjectPlace">The place representing the target (<see cref="DObject"/>) iff <paramref name="targetExpr"/> is not provided.</param>
/// <param name="targetPlace">The place representing the target (object) iff <paramref name="targetExpr"/> and <paramref name="targetObjectPlace"/> are not provided.</param>
/// <param name="targetType">Type of target iff we are getting property statically.</param>
/// <param name="fieldName">The name of the field. Can be null if the name is not known at compile time (indirect).</param>
/// <param name="fieldNameExpr">The expression used to get field name in run time (iff <paramref name="fieldName"/> is <c>null</c>.</param>
/// <param name="issetSemantics">Wheter we are only checking if the property exists. If true, no warnings are thrown during run time.</param>
/// <returns>Type code of the value that is pushed onto the top of the evaluation stack.</returns>
public PhpTypeCode EmitGetProperty(
PHP.Core.CodeGenerator /*!*/ cg, bool wantRef,
Expression targetExpr, IPlace targetObjectPlace, IPlace targetPlace, DType targetType,
string fieldName, Expression fieldNameExpr,
bool issetSemantics)
{
Debug.Assert(fieldName != null ^ fieldNameExpr != null);
Debug.Assert(targetExpr != null || targetObjectPlace != null || targetPlace != null || targetType != null);
//
bool staticCall = (targetExpr == null && targetObjectPlace == null && targetPlace == null); // we are going to access static property
bool fieldNameIsKnown = (fieldName != null);
bool classContextIsKnown = (this.classContextPlace != null);
//
// binder flags:
//
Type returnType = wantRef ? Types.PhpReference[0] : Types.Object[0];
//
// define the call site:
//
//
List <Type> additionalArgs = new List <Type>();
if (!classContextIsKnown)
{
additionalArgs.Add(Types.DTypeDesc[0]);
}
if (!fieldNameIsKnown)
{
additionalArgs.Add(Types.String[0]);
}
var delegateTypeArgs = GetPropertyDelegateTypeArgs(
staticCall ? Types.DTypeDesc[0] : ((targetObjectPlace != null) ? Types.DObject[0] : Types.Object[0]), // DTypeDesc of static field's declaring type || DObject if field called on DObject known at compile time || otherwise object
additionalArgs.ToArray(),
returnType);
var delegateType = /*System.Linq.Expressions.Expression.*/ delegateBuilder.GetDelegateType(delegateTypeArgs, callSitesCount); // (J) do not create dynamic delegates in dynamic modules, so they can be referenced from non-transient assemblies
//
var field = DefineCallSite(cg.IL, string.Format("get{0}_{1}", wantRef ? "ref" : string.Empty, fieldName ?? "$"), delegateType, (il) =>
{
// <LOAD> Binder.{GetProperty|GetStaticProperty}( fieldName, classContext, issetSemantics, <returnType> )
if (fieldName != null)
{
il.Emit(OpCodes.Ldstr, fieldName);
}
else
{
il.Emit(OpCodes.Ldnull);
}
if (this.classContextPlace != null)
{
this.classContextPlace.EmitLoad(il);
}
else
{
il.Emit(OpCodes.Ldsfld, Fields.UnknownTypeDesc.Singleton);
}
il.LoadBool(issetSemantics);
il.Emit(OpCodes.Ldtoken, returnType);
il.Emit(OpCodes.Call, Methods.GetTypeFromHandle);
il.Emit(OpCodes.Call, staticCall ? Methods.Binder.StaticGetProperty : Methods.Binder.GetProperty);
});
//
// call the CallSite:
//
// <field>.Target( <field>, <targetExpr|targetType>, (classContext)?, <methodNameExpr>? ):
cg.IL.Emit(OpCodes.Ldsfld, field);
cg.IL.Emit(OpCodes.Ldfld, field.FieldType.GetField("Target"));
cg.IL.Emit(OpCodes.Ldsfld, field);
if (staticCall)
{
targetType.EmitLoadTypeDesc(cg, ResolveTypeFlags.UseAutoload | ResolveTypeFlags.ThrowErrors);
}
else if (targetExpr != null)
{
cg.ChainBuilder.Lengthen(); // for hop over ->
cg.EmitBoxing(targetExpr.Emit(cg)); // prepare for operator invocation
}
else if (targetObjectPlace != null)
{
targetObjectPlace.EmitLoad(cg.IL);
}
else if (targetPlace != null)
{
targetPlace.EmitLoad(cg.IL);
}
else
{
Debug.Fail();
}
if (!classContextIsKnown)
{
cg.EmitLoadClassContext();
}
if (!fieldNameIsKnown)
{
cg.EmitName(fieldName /*null*/, fieldNameExpr, true, PhpTypeCode.String);
}
cg.MarkTransientSequencePoint();
cg.IL.Emit(OpCodes.Callvirt, delegateType.GetMethod("Invoke"));
cg.MarkTransientSequencePoint();
//
return(PhpTypeCodeEnum.FromType(returnType));
}
internal override PhpTypeCode EmitCall(CodeGenerator/*!*/ codeGenerator, string fallbackQualifiedName, CallSignature callSignature,
IPlace instance, bool runtimeVisibilityCheck, int overloadIndex, DType type, Position position,
AccessType access, bool callVirt)
{
if (IsStatic != (instance == null) || runtimeVisibilityCheck)
{
Expression targetExpression = null;
if (instance != null)
{
targetExpression = ExpressionPlace.GetExpression(instance); // the instance expression, $this would be determined in runtime
Debug.Assert(targetExpression != null || instance == IndexedPlace.ThisArg,
"Unexpected instance IPlace type" + this.Name.Value);
}
// call the operator if we could not provide an appropriate instance or the visibility has to be checked:
return codeGenerator.EmitRoutineOperatorCall(this.UsesLateStaticBinding ? type : this.DeclaringType, targetExpression, this.FullName, fallbackQualifiedName, null, callSignature, access);
}
Debug.Assert(IsStatic == (instance == null));
if (IsStatic) callVirt = false; // never call static method virtually
ILEmitter il = codeGenerator.IL;
bool args_aware = (Properties & RoutineProperties.IsArgsAware) != 0;
var constructedType = type as ConstructedType;
// load the instance reference if we have one:
// Just here we need RealObject if possible. When calling CLR method on $this,
// Phalanger has "this.<proxy>" in "codeGenerator.SelfPlace". We need just "this".
EmitLoadInstanceUnwrapped(codeGenerator, instance);
// arg-full overload may not be present in the case of classes declared Class Library where
// we do not require the user to specify both overloads
if (args_aware || ArgFullInfo == null)
{
// args-aware routines //
Debug.Assert(callVirt == false, "Cannot call ArgLess stub virtually!");
// all arg-less stubs have the 'instance' parameter
if (instance == null) il.Emit(OpCodes.Ldnull);
// emits load of parameters to the PHP stack:
callSignature.EmitLoadOnPhpStack(codeGenerator);
// CALL <routine>(context.Stack)
codeGenerator.EmitLoadScriptContext();
il.Emit(OpCodes.Ldfld, Fields.ScriptContext_Stack);
if (this.UsesLateStaticBinding)
{
// <stack>.LateStaticBindType = <type>
il.Emit(OpCodes.Dup);
type.EmitLoadTypeDesc(codeGenerator, ResolveTypeFlags.None);
il.Emit(OpCodes.Stfld, Fields.PhpStack_LateStaticBindType);
}
il.Emit(OpCodes.Call, DType.MakeConstructed(ArgLessInfo, constructedType));
// arg-less overload's return value has to be type-cast to a reference if it returns one:
if (signature == null || signature.AliasReturn)
codeGenerator.IL.Emit(OpCodes.Castclass, typeof(PhpReference));
}
else
{
// args-unaware routines //
// CALL <routine>(context, <argumens>)
codeGenerator.EmitLoadScriptContext();
callSignature.EmitLoadOnEvalStack(codeGenerator, this);
il.Emit(callVirt ? OpCodes.Callvirt : OpCodes.Call, DType.MakeConstructed(ArgFullInfo, constructedType));
}
// marks transient sequence point just after the call:
codeGenerator.MarkTransientSequencePoint();
return ((signature == null || signature.AliasReturn) ? PhpTypeCode.PhpReference : PhpTypeCode.Object);
}
