// arguments: complex arguments (expressions, maplets, splat, block)
// singleArgument: siple argument (complex are not used)
// assignmentRhsArgument: rhs of the assignment: target.method=(rhs)
/*!*/
internal static MSA.Expression TransformRead(Expression/*!*/ node, AstGenerator/*!*/ gen, bool hasImplicitSelf,
string/*!*/ methodName, MSA.Expression/*!*/ transformedTarget,
Arguments arguments, Block block, MSA.Expression singleArgument, MSA.Expression assignmentRhsArgument)
{
Debug.Assert(assignmentRhsArgument == null || block == null, "Block not allowed in assignment");
Debug.Assert(singleArgument == null || arguments == null && assignmentRhsArgument == null);
Assert.NotNull(gen, transformedTarget);
Assert.NotEmpty(methodName);
// Pass args in this order:
// 1. instance
// 2. block (if present)
// 3. passed args: normal args, maplets, array
// 4. RHS of assignment (if present)
MSA.Expression blockArgVariable;
MSA.Expression transformedBlock;
if (block != null) {
blockArgVariable = gen.CurrentScope.DefineHiddenVariable("#block-def", typeof(Proc));
transformedBlock = block.Transform(gen);
} else {
blockArgVariable = transformedBlock = null;
}
var siteBuilder = new CallSiteBuilder(gen, transformedTarget, blockArgVariable);
if (arguments != null) {
arguments.TransformToCall(gen, siteBuilder);
} else if (singleArgument != null) {
siteBuilder.Add(singleArgument);
}
MSA.Expression rhsVariable = null;
if (assignmentRhsArgument != null) {
rhsVariable = gen.CurrentScope.DefineHiddenVariable("#rhs", assignmentRhsArgument.Type);
siteBuilder.RhsArgument = Ast.Assign(rhsVariable, assignmentRhsArgument);
}
var dynamicSite = siteBuilder.MakeCallAction(methodName, hasImplicitSelf);
#if FEATURE_CALL_SITE_TRACER
if (gen.Context.CallSiteCreated != null) {
gen.Context.CallSiteCreated(node, dynamicSite);
}
#endif
MSA.Expression result = gen.DebugMark(dynamicSite, methodName);
if (block != null) {
result = gen.DebugMark(MakeCallWithBlockRetryable(gen, result, blockArgVariable, transformedBlock, block.IsDefinition),
"#RB: method call with a block ('" + methodName + "')");
}
if (assignmentRhsArgument != null) {
result = Ast.Block(result, rhsVariable);
}
return result;
}
internal void TransformToCall(AstGenerator /*!*/ gen, CallSiteBuilder /*!*/ siteBuilder)
{
if (_expressions != null)
{
foreach (var arg in _expressions)
{
siteBuilder.Add(arg.TransformRead(gen));
}
}
if (_maplets != null)
{
siteBuilder.Add(gen.TransformToHashConstructor(_maplets));
}
if (_array != null)
{
siteBuilder.SplattedArgument =
AstUtils.LightDynamic(SplatAction.Make(gen.Context), typeof(IList), _array.TransformRead(gen));
}
}
internal void TransformForSuperCall(AstGenerator /*!*/ gen, CallSiteBuilder /*!*/ siteBuilder)
{
for (int i = 0; i < _leadingMandatoryCount; i++)
{
siteBuilder.Add(_mandatory[i].TransformRead(gen));
}
foreach (SimpleAssignmentExpression s in _optional)
{
siteBuilder.Add(s.Left.TransformRead(gen));
}
for (int i = _leadingMandatoryCount; i < _mandatory.Length; i++)
{
siteBuilder.Add(_mandatory[i].TransformRead(gen));
}
if (_unsplat != null)
{
siteBuilder.SplattedArgument = _unsplat.TransformRead(gen);
}
}
internal void TransformForSuperCall(AstGenerator /*!*/ gen, CallSiteBuilder /*!*/ siteBuilder)
{
if (_mandatory != null)
{
foreach (Variable v in _mandatory)
{
siteBuilder.Add(v.TransformRead(gen));
}
}
if (_optional != null)
{
foreach (SimpleAssignmentExpression s in _optional)
{
siteBuilder.Add(s.Left.TransformRead(gen));
}
}
if (_array != null)
{
siteBuilder.SplattedArgument = _array.TransformRead(gen);
}
}
internal override MSA.Expression /*!*/ TransformRead(AstGenerator /*!*/ gen)
{
// variable assigned to the transformed block in MakeCallWithBlockRetryable:
MSA.Expression blockArgVariable = gen.CurrentScope.DefineHiddenVariable("#super-call-block", typeof(Proc));
// invoke super member action:
var siteBuilder = new CallSiteBuilder(gen, gen.CurrentSelfVariable, blockArgVariable);
// arguments:
if (HasImplicitArguments)
{
// MRI 1.8: If a block is called via define_method stub its parameters are used here.
// MRI 1.9: This scenario is not supported.
// We don't support this either. Otherwise we would need to emit super call with dynamic parameters if gen.CurrentBlock != null.
if (gen.CurrentMethod.Parameters != null)
{
gen.CurrentMethod.Parameters.TransformForSuperCall(gen, siteBuilder);
}
else if (gen.CompilerOptions.TopLevelParameterNames != null)
{
bool hasUnsplat = gen.CompilerOptions.TopLevelHasUnsplatParameter;
string[] names = gen.CompilerOptions.TopLevelParameterNames;
// dynamic lookup:
for (int i = 0; i < names.Length - (hasUnsplat ? 1 : 0); i++)
{
siteBuilder.Add(Methods.GetLocalVariable.OpCall(gen.CurrentScopeVariable, AstUtils.Constant(names[i])));
}
if (hasUnsplat)
{
siteBuilder.SplattedArgument =
Methods.GetLocalVariable.OpCall(gen.CurrentScopeVariable, AstUtils.Constant(names[names.Length - 1]));
}
}
else
{
// this means we are not inside any method scope -> an exception will be thrown at the call site
}
}
else
{
Arguments.TransformToCall(gen, siteBuilder);
}
// block:
MSA.Expression transformedBlock;
if (Block != null)
{
transformedBlock = Block.Transform(gen);
}
else
{
transformedBlock = gen.MakeMethodBlockParameterRead();
}
return(gen.DebugMark(
MethodCall.MakeCallWithBlockRetryable(gen,
siteBuilder.MakeSuperCallAction(gen.CurrentFrame.UniqueId, HasImplicitArguments),
blockArgVariable,
transformedBlock,
Block != null && Block.IsDefinition
),
"#RB: super call ('" + gen.CurrentMethod.MethodName + "')"
));
}