public override void Compile(CodeContext c)
{
Label looplabel = c.IL.DefineLabel();
Label elselabel = c.IL.DefineLabel();
Label endlabel = c.IL.DefineLabel();
LocalBuilder enumerator = c.IL.DeclareLocal(typeof(IEnumerator));
Type collectiontype = collection.Evaluate(c);
if (collectiontype == null)
{
throw new ApplicationException();
}
if (!typeof(IEnumerable).IsAssignableFrom(collectiontype))
{
throw new ApplicationException();
}
Type valuetype;
if (!c.Types.TryGetValue(variabletype, out valuetype))
{
throw new ApplicationException();
}
LocalBuilder value = c.IL.DeclareLocal(valuetype);
CodeContext c2 = new CodeContext(c);
c2.Locals.Add(variablename, value);
if (collectiontype.IsValueType)
{
c.IL.Emit(OpCodes.Constrained, typeof(IEnumerable));
}
c.IL.Emit(OpCodes.Callvirt, typeof(IEnumerable).GetMethod("GetEnumerator"));
c.IL.Emit(OpCodes.Stloc, enumerator);
c.IL.MarkLabel(looplabel);
c.IL.Emit(OpCodes.Ldloc, enumerator);
c.IL.Emit(OpCodes.Callvirt, typeof(IEnumerator).GetMethod("MoveNext"));
c.IL.Emit(OpCodes.Brfalse, elselabel);
c.IL.Emit(OpCodes.Ldloc, enumerator);
c.IL.Emit(OpCodes.Callvirt, typeof(IEnumerator).GetProperty("Current").GetGetMethod());
c.IL.Emit(OpCodes.Isinst, valuetype);
c.IL.Emit(OpCodes.Dup);
c.IL.Emit(OpCodes.Stloc, value);
c.IL.Emit(OpCodes.Brfalse, looplabel);
loopstatement.SubCompile(c2);
c.IL.Emit(OpCodes.Br, looplabel);
c.IL.MarkLabel(elselabel);
elsestatement.SubCompile(c);
c.IL.MarkLabel(endlabel);
}
public override void Compile(CodeContext c)
{
Label elselabel = c.IL.DefineLabel();
Label endlabel = c.IL.DefineLabel();
Type type = condition.Evaluate(c);
if (type != typeof(bool))
{
throw new ApplicationException();
}
c.IL.Emit(OpCodes.Brfalse, elselabel);
thenstatement.SubCompile(c);
c.IL.Emit(OpCodes.Br, endlabel);
c.IL.MarkLabel(elselabel);
elsestatement.SubCompile(c);
c.IL.MarkLabel(endlabel);
}