internal void GenCode(CodeGenContext context)
{
for (Node stmt = this; stmt != null; stmt = stmt.nd_next)
{
stmt.GenCode0(context);
if (stmt.nd_next != null && context.Reachable())
context.pop();
}
}
internal override void GenCode0(CodeGenContext context)
{
PERWAPI.CILLabel finalLabel = context.NewLabel();
int RescueTemp = context.CreateLocal("rescueTemp", PERWAPI.PrimitiveType.Object);
context.ldnull();
context.stloc(RescueTemp);
if (ensure != null)
{
context.StartBlock(Clause.Try); // outer try block with finally
context.StartBlock(Clause.Try); // inner try block with catch
}
GenInnerBlock(context, RescueTemp);
if (ensure != null)
{
context.Goto(finalLabel);
PERWAPI.TryBlock innerTry = context.EndTryBlock();
context.StartBlock(Clause.Catch);
GenRescue(context, null, 0, null);
context.EndCatchBlock(Runtime.SystemExceptionRef, innerTry);
PERWAPI.TryBlock outerTry = context.EndTryBlock();
// Fixme: reset labels to prevent branches out of finally block.
context.StartBlock(Clause.Finally);
ensure.GenCode(context);
if (context.Reachable())
context.pop();
context.endfinally();
context.EndFinallyBlock(outerTry);
context.CodeLabel(finalLabel);
context.newEndPoint(location);
}
context.ldloc(RescueTemp);
context.ReleaseLocal(RescueTemp, true);
}
internal override void GenCode0(CodeGenContext context)
{
CodeGenContext Begin = context.CreateMethod(FileClass(), MethAttr.PublicStatic, "Begin" + (seq++), PrimitiveType.Object,
new Param(ParamAttr.Default, "recv", PrimitiveType.Object),
new Param(ParamAttr.Default, "caller", Runtime.FrameRef));
Begin.startMethod(this.location);
AddScopeLocals(Begin);
AddScopeBody(Begin);
Begin.ReleaseLocal(0, true);
Begin.Close();
// Begin(recv, caller);
context.ldarg("recv");
context.ldloc(0);
context.call(Begin.Method);
context.pop();
}
internal void GenCode(CodeGenContext context, PERWAPI.CILLabel endLabel, int RescueTemp, int exception)
{
for (RESCUE_CLAUSE clause = this; clause != null; clause = clause.next)
{
PERWAPI.CILLabel nextClause = context.NewLabel();
PERWAPI.CILLabel thisClause = context.NewLabel();
context.ldc_i4(0);
LOCAL exceptionCaught = context.StoreInLocal("caught", PERWAPI.PrimitiveType.Boolean, this.location);
for (Node type = clause.types; type != null; type = type.nd_next)
{
PERWAPI.CILLabel label1 = context.NewLabel();
// Precompute each separately to avoid computing a list of types
type.GenCode0(context);
LOCAL tt = context.StoreInLocal("type", PERWAPI.PrimitiveType.Object, type.location);
new METHOD_CALL(tt, ID.intern(Tokens.tEQQ), new AST.LOCAL(exception, type.location), type.location).GenCode(context);
context.ReleaseLocal(tt.local, true);
context.call(Runtime.Eval.Test);
context.brfalse(label1);
context.PushTrue();
context.stloc(exceptionCaught.local);
context.CodeLabel(label1);
}
context.ldloc(exceptionCaught.local);
context.brtrue(thisClause);
context.ReleaseLocal(exceptionCaught.local, true);
context.br(nextClause);
context.CodeLabel(thisClause);
if (clause.var != null)
{
clause.var.Assign(context, new AST.LOCAL(exception, clause.var.location));
context.pop();
}
if (clause.body != null)
clause.body.GenCode(context);
else
context.ldnull();
if (context.Reachable())
context.stloc(RescueTemp);
// reset $!
//Eval.ruby_errinfo.value = null;
context.ldsfld(Runtime.Eval.ruby_errinfo);
context.ldnull();
context.stfld(Runtime.global_variable.value);
context.Goto(endLabel);
context.CodeLabel(nextClause);
}
}
internal override void Assign(CodeGenContext context, Node rhs)
{
// Gen right hand sides
ListGen mrhs;
if (rhs is ListGen && !(rhs is MultipleRHS))
mrhs = (ListGen)rhs;
else
mrhs = new ARGS(null, null, rhs, null, location, true);
bool created;
ISimple list = mrhs.GenArgList(context, out created);
list.GenSimple(context);
context.callvirt(Runtime.ArgList.CheckSingleRHS);
int array = context.StoreInTemp("mrhs", Runtime.ArgListRef, location);
context.ReleaseLocal(list, created);
// Gen assignments to left hand sides
for (LVALUE l = elements; l != null; l = (LVALUE)l.nd_next)
{
l.Assign(context, new MultipleRHS(array, l.location));
context.pop();
}
context.ldloc(array);
context.callvirt(Runtime.ArgList.ToRubyArray);
context.ReleaseLocal(array, true);
}
internal override void GenCode0(CodeGenContext context)
{
Labels original = context.labels;
// ---------------- Create new label context for loop ----------------------
context.labels = new Labels();
context.labels.Next = context.NewLabel();
context.labels.Break = context.NewLabel();
context.labels.Redo = context.NewLabel();
context.labels.Retry = context.NewLabel();
context.labels.Return = original.Return;
context.CodeLabel(context.labels.Retry);
context.newStartPoint(location);
context.ldnull();
context.stloc(parent_scope.returnTemp);
context.CodeLabel(context.labels.Redo);
if (body != null)
{
body.GenCode(context);
if (context.Reachable())
context.pop();
}
context.CodeLabel(context.labels.Next);
// if (Eval.Test(cond))
context.newLine(cond.location);
cond.GenCode(context);
context.call(Runtime.Eval.Test);
if (whileTrue)
context.brtrue(context.labels.Retry);
else
context.brfalse(context.labels.Retry);
context.CodeLabel(context.labels.Break);
context.newEndPoint(location);
context.ldloc(parent_scope.returnTemp);
// --------------------- Restore Label context -------------------------
context.labels = original;
}
