Type EmitAssignment(CodeExpression Left, CodeExpression Right, bool ForceTypes)
{
Depth++;
Debug("Emitting assignment expression");
Type Generated = typeof(void);
if (Left is CodeVariableReferenceExpression)
{
// local IL variables generated by parser
var Reference = Left as CodeVariableReferenceExpression;
LocalBuilder Var;
if (Locals.ContainsKey(Reference.VariableName))
{
Var = Locals[Reference.VariableName];
}
else
{
Var = Generator.DeclareLocal(typeof(int));
Locals.Add(Reference.VariableName, Var);
}
EmitExpression(Right, ForceTypes);
Generator.Emit(OpCodes.Stloc, Var);
Generator.Emit(OpCodes.Pop);
}
else if (Left is CodeArrayIndexerExpression)
{
var index = (CodeArrayIndexerExpression)Left;
Generator.Emit(OpCodes.Ldloc, VarsProperty);
EmitExpression(index.Indices[0]);
Type resultType = EmitExpression(Right, ForceTypes);
if (resultType.IsValueType)
{
Generator.Emit(OpCodes.Box, resultType);
}
Generator.Emit(OpCodes.Callvirt, SetVariable);
Generated = typeof(object);
}
else if (Left is CodePropertyReferenceExpression)
{
var prop = (CodePropertyReferenceExpression)Left;
// HACK: property set method target
var info = typeof(Rusty.Core).GetProperty(prop.PropertyName);
if (Mirror != null)
{
info = Mirror.GrabProperty(info);
}
var set = info == null ? null : info.GetSetMethod();
if (set == null)
{
Generator.Emit(OpCodes.Ldnull);
}
else
{
EmitExpression(Right);
Generator.Emit(OpCodes.Dup);
Generator.Emit(OpCodes.Call, set);
}
Generated = typeof(object);
}
else
{
throw new CompileException(Left, "Left hand is unassignable");
}
Depth--;
return(Generated);
}