source/errorhandlers.h

   1 /* This file is part of Shapes.
   2  *
   3  * Shapes is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * any later version.
   7  *
   8  * Shapes is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with Shapes.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  * Copyright 2008, 2014 Henrik Tidefelt
  17  */
  18
  19 #pragma once
  20
  21 #include "functiontypes.h"
  22 #include "shapesexceptions.h"
  23
  24 namespace Shapes
  25 {
  26         namespace Lang
  27         {
  28
  29         class ErrorHandler : public Lang::Function
  30         {
  31         public:
  32                 ErrorHandler( );
  33                 virtual ~ErrorHandler( );
  34                 virtual bool isTransforming( ) const;
  35                 virtual void gcMark( Kernel::GCMarkedSet & marked ){ };
  36         };
  37
  38         template< class T >
  39                 class ExceptionWrapper : public Lang::ErrorHandler
  40         {
  41         protected:
  42                 const Ast::PlacedIdentifier title_;
  43                 const char * msg_;
  44         public:
  45                 ExceptionWrapper( const Ast::PlacedIdentifier & title, const char * msg );
  46                 virtual ~ExceptionWrapper( );
  47                 virtual void call( Kernel::EvalState * evalState, Kernel::Arguments & args, const Ast::SourceLocation & callLoc ) const;
  48         };
  49
  50         }
  51 }
  52
  53
  54 template< class T >
  55 Shapes::Lang::ExceptionWrapper< T >::ExceptionWrapper( const Ast::PlacedIdentifier & title, const char * msg )
  56         : title_( title ), msg_( msg )
  57 { }
  58
  59 template< class T >
  60 Shapes::Lang::ExceptionWrapper< T >::~ExceptionWrapper( )
  61 { }
  62
  63 template< class T >
  64 void
  65 Shapes::Lang::ExceptionWrapper< T >::call( Kernel::EvalState * evalState, Kernel::Arguments & args, const Ast::SourceLocation & callLoc ) const
  66 {
  67         throw T( msg_ );
  68 }