internal static void TransformDynamicSetMemberInstruction(DynamicSetMemberInstruction inst, StatementTransformContext context)
{
if (!inst.BinderFlags.HasFlag(CSharpBinderFlags.ValueFromCompoundAssignment))
{
return;
}
if (!(inst.Value is DynamicBinaryOperatorInstruction binaryOp))
{
return;
}
if (!(binaryOp.Left is DynamicGetMemberInstruction dynamicGetMember))
{
return;
}
if (!dynamicGetMember.Target.Match(inst.Target).Success)
{
return;
}
if (!SemanticHelper.IsPure(dynamicGetMember.Target.Flags))
{
return;
}
if (inst.Name != dynamicGetMember.Name || !DynamicCompoundAssign.IsExpressionTypeSupported(binaryOp.Operation))
{
return;
}
context.Step("dynamic.setmember.compound -> dynamic.compound.op", inst);
inst.ReplaceWith(new DynamicCompoundAssign(binaryOp.Operation, binaryOp.BinderFlags, binaryOp.Left, binaryOp.LeftArgumentInfo, binaryOp.Right, binaryOp.RightArgumentInfo));
}
/// <summary>
/// dynamic.setindex.compound(target, index, dynamic.binary.operator op(dynamic.getindex(target, index), value))
/// =>
/// dynamic.compound.op (dynamic.getindex(target, index), value)
/// </summary>
protected internal override void VisitDynamicSetIndexInstruction(DynamicSetIndexInstruction inst)
{
base.VisitDynamicSetIndexInstruction(inst);
if (!inst.BinderFlags.HasFlag(CSharpBinderFlags.ValueFromCompoundAssignment))
{
return;
}
if (!(inst.Arguments.LastOrDefault() is DynamicBinaryOperatorInstruction binaryOp))
{
return;
}
if (!(binaryOp.Left is DynamicGetIndexInstruction dynamicGetIndex))
{
return;
}
if (inst.Arguments.Count != dynamicGetIndex.Arguments.Count + 1)
{
return;
}
// Ensure that same arguments are passed to dynamicGetIndex and inst:
for (int j = 0; j < dynamicGetIndex.Arguments.Count; j++)
{
if (!SemanticHelper.IsPure(dynamicGetIndex.Arguments[j].Flags))
{
return;
}
if (!dynamicGetIndex.Arguments[j].Match(inst.Arguments[j]).Success)
{
return;
}
}
if (!DynamicCompoundAssign.IsExpressionTypeSupported(binaryOp.Operation))
{
return;
}
context.Step("dynamic.setindex.compound -> dynamic.compound.op", inst);
inst.ReplaceWith(new DynamicCompoundAssign(binaryOp.Operation, binaryOp.BinderFlags, binaryOp.Left, binaryOp.LeftArgumentInfo, binaryOp.Right, binaryOp.RightArgumentInfo));
}
