/// <include file='Doc/Nodes.xml' path='doc/method[@name="Emit"]/*'/>
internal override PhpTypeCode Emit(CodeGenerator/*!*/ codeGenerator)
{
Statistics.AST.AddNode("IndirectVarUse");
PhpTypeCode result = PhpTypeCode.Invalid;
switch (codeGenerator.SelectAccess(access))
{
// This case occurs everytime we want to get current variable value
// All we do is push the value onto the IL stack
case AccessType.Read: // Push value onto a IL stack
result = EmitNodeRead(codeGenerator);
break;
// This case occurs when the varible is written ($a = $b, then $a has Write mark)
// We only prepare the stack for storing, the work will be done later,
// by EmitAssign()
case AccessType.Write:
result = EmitNodeWrite(codeGenerator);
break;
case AccessType.None:
EmitNodeRead(codeGenerator);
codeGenerator.IL.Emit(OpCodes.Pop);
result = PhpTypeCode.Void;
break;
case AccessType.ReadRef:
// if the selector is set to the ReadRef, the chain is emitted as if it was written
// (chained nodes are marked as ReadAndWrite):
if (codeGenerator.AccessSelector == AccessType.ReadRef)
codeGenerator.AccessSelector = AccessType.Write;
result = EmitNodeReadRef(codeGenerator);
Debug.Assert(result == PhpTypeCode.PhpReference);
break;
case AccessType.ReadUnknown:
result = EmitNodeReadUnknown(codeGenerator);
break;
case AccessType.WriteRef:
EmitNodeWriteRef(codeGenerator);
result = PhpTypeCode.PhpReference;
break;
default:
result = PhpTypeCode.Invalid;
Debug.Fail();
break;
}
return result;
}
/// <include file='Doc/Nodes.xml' path='doc/method[@name="Emit"]/*'/>
internal override PhpTypeCode Emit(CodeGenerator/*!*/ codeGenerator)
{
Statistics.AST.AddNode("ItemUse");
PhpTypeCode result = PhpTypeCode.Invalid;
switch (codeGenerator.SelectAccess(access))
{
case AccessType.None:
result = EmitNodeRead(codeGenerator, Operators.GetItemKinds.Get);
codeGenerator.IL.Emit(OpCodes.Pop);
break;
case AccessType.Read:
result = EmitNodeRead(codeGenerator, Operators.GetItemKinds.Get);
break;
case AccessType.Write:
// prepares for write:
result = EmitNodeWrite(codeGenerator);
break;
case AccessType.ReadRef:
// if the selector is set to the ReadRef, the chain is emitted as if it was written
// (chained nodes are marked as ReadAndWrite):
if (codeGenerator.AccessSelector == AccessType.ReadRef)
codeGenerator.AccessSelector = AccessType.Write;
result = EmitNodeReadRef(codeGenerator);
break;
case AccessType.ReadUnknown:
result = EmitNodeReadUnknown(codeGenerator);
break;
case AccessType.WriteRef:
// prepares for write:
result = EmitNodeWriteRef(codeGenerator);
break;
default:
Debug.Fail();
break;
}
return result;
}
/// <include file='Doc/Nodes.xml' path='doc/method[@name="Emit"]/*'/>
internal override PhpTypeCode Emit(CodeGenerator/*!*/ codeGenerator)
{
Statistics.AST.AddNode("FieldUse.Static");
ChainBuilder chain = codeGenerator.ChainBuilder;
PhpTypeCode result = PhpTypeCode.Invalid;
switch (codeGenerator.SelectAccess(access))
{
case AccessType.Read:
result = EmitRead(codeGenerator, false);
if (chain.IsMember) chain.Lengthen();
break;
case AccessType.ReadUnknown:
result = EmitRead(codeGenerator, true);
if (chain.IsMember) chain.Lengthen();
break;
case AccessType.ReadRef:
if (chain.IsMember)
{
chain.Lengthen();
result = EmitRead(codeGenerator, false);
}
else
{
result = EmitRead(codeGenerator, true);
}
break;
case AccessType.Write:
if (chain.IsMember)
{
result = EmitEnsure(codeGenerator, chain);
chain.Lengthen();
}
else
{
assignmentCallback = EmitWrite(codeGenerator, false);
result = PhpTypeCode.Unknown;
}
break;
case AccessType.WriteRef:
if (chain.IsMember)
{
result = EmitEnsure(codeGenerator, chain);
chain.Lengthen();
}
else
{
assignmentCallback = EmitWrite(codeGenerator, true);
result = PhpTypeCode.Unknown;
}
break;
case AccessType.None:
result = PhpTypeCode.Void;
break;
}
return result;
}
