protected override void DoExpand(MacroContext context)
{
if (context.Invocation.Arguments.Count == 0)
{
context.ReportMessage(
Message.Error(
string.Format(Resources.CallSubInterpret_OneArgument, Alias), context.Invocation.Position,
MessageClasses.SubUsage));
return;
}
if (context.CurrentLoopBlock != null && !context.IsJustEffect)
{
context.ReportMessage(
Message.Error(
string.Format(
Resources.CallSubInterpret_asExpressionInLoop, CallSub.Alias, Alias),
context.Invocation.Position, MessageClasses.SubAsExpressionInLoop));
return;
}
//Store result of call
var resultV = context.AllocateTemporaryVariable();
_storeResult(context, resultV);
//Extract return variant as int into retVarV
var retVarV = context.AllocateTemporaryVariable();
_extractReturnVariant(context, resultV, retVarV);
Func<AstGetSet> retVar = () => context.CreateCall(EntityRef.Variable.Local.Create(retVarV));
//Extract return value into retValueV (which happens to be the same as resultV)
var retValueV = resultV;
_extractReturnValue(context, resultV, retValueV);
// ReSharper disable ImplicitlyCapturedClosure // perfectly safe as neither lambda survives the method
Func<AstGetSet> retValue = () => context.CreateCall(EntityRef.Variable.Local.Create(retValueV));
// ReSharper restore ImplicitlyCapturedClosure
//Break and Continue behave differently outside loop blocks
AstNode contStmt, breakStmt;
_determineActions(context, retValue, out contStmt, out breakStmt);
//Generate check for continue
_genChecks(context, retVar, contStmt, breakStmt);
context.Block.Expression = retValue();
context.FreeTemporaryVariable(retVarV);
context.FreeTemporaryVariable(resultV);
}