// Copyright (c) Lawrence Livermore National Security, LLC and other VisIt
// Project developers.  See the top-level LICENSE file for dates and other
// details.  No copyright assignment is required to contribute to VisIt.

#ifndef EXPRTOKEN_H
#define EXPRTOKEN_H
#include <expr_exports.h>

#include <string>
#include <stdlib.h>
#include <ExprParseTreeNode.h>
#include <VisItToken.h>

enum TokenType {
    TT_NoToken    = 0,
    // All single-character tokens go in this range
    TT_EOF        = EOF_TOKEN_ID,
    TT_Identifier,
    TT_IntegerConst,
    TT_FloatConst,
    TT_StringConst,
    TT_BoolConst,
    TT_Space,
    TT_NTokens
};

// ****************************************************************************
//  Expression Language Tokens
//
//  Purpose:
//    ExprToken is the base class of all VisIt Expression specific
//    tokens.  Inside a parse tree, tokens are contained in
//    TokenParseTreeNode objects, which will often be leaf elements of
//    a parse tree.
//
//  Programmer:  Jeremy Meredith
//  Creation:    April  5, 2002
//
//  Modifications:
//    Sean Ahern, Thu Apr 18 11:25:16 PDT 2002
//    Made the base class ExprGrammarNode so that I can separate out the
//    code that talks to the engine.
//
//    Sean Ahern, Wed Oct 16 16:41:59 PDT 2002
//    Moved the engine communication code to a separate set of classes
//    that are owned by the viewer.  I may collapse ExprGrammarNode again.
//
//    Jeremy Meredith, Wed Jun  9 10:20:08 PDT 2004
//    Added GetValue to BoolConst.
//
//    Jeremy Meredith, Wed Nov 24 12:32:06 PST 2004
//    Split all these out of the new base Token class and into a new library.
//
// ****************************************************************************
class EXPR_API ExprToken : public Token
{
  public:
    ExprToken(const Pos &p, int t) : Token(p,t) { }
    virtual ~ExprToken() { }
    int GetType() const { return type; }
  private:
};

class EXPR_API Space : public ExprToken
{
  public:
    Space(const Pos &p, const std::string &v) : ExprToken(p, TT_Space), val(v) { }
    virtual ~Space() { }
    virtual void PrintNode(ostream &o) { o << "Space\n"; }
  private:
    std::string val;
};

class EXPR_API Character : public ExprToken
{
  public:
    Character(const Pos &p, const std::string &v) : ExprToken(p, v[0]), val(v[0]) { }
    virtual ~Character() { }
    virtual void PrintNode(ostream &o) { o << "Char("<<val<<")\n"; }
    const char &GetVal() const { return val; }
  private:
    char val;
};

class EXPR_API Identifier : public ExprToken
{
  public:
    Identifier(const Pos &p, const std::string &v) : ExprToken(p, TT_Identifier), val(v) { }
    virtual ~Identifier() { }
    virtual void PrintNode(ostream &o) { o << "Ident("<<val.c_str()<<")\n"; }
    const std::string &GetVal() const { return val; }
  private:
    std::string val;
};

class EXPR_API IntegerConst : public ExprToken
{
  public:
    IntegerConst(const Pos &p, const std::string &v) : ExprToken(p, TT_IntegerConst), val(strtol(v.c_str(),NULL,10)) { }
    virtual ~IntegerConst() { }
    virtual void PrintNode(ostream &o) { o << "Integer("<<val<<")\n"; }
    int GetValue(void) { return val; }
  private:
    int val;
};

class EXPR_API FloatConst : public ExprToken
{
  public:
    FloatConst(const Pos &p, const std::string &v) : ExprToken(p, TT_FloatConst), val(strtod(v.c_str(),NULL)) { }
    virtual ~FloatConst() { }
    virtual void PrintNode(ostream &o) { o << "Float("<<val<<")\n"; }
    double GetValue(void) { return val; }
  private:
    double val;
};

class EXPR_API StringConst : public ExprToken
{
  public:
    StringConst(const Pos &p, const std::string &v) : ExprToken(p, TT_StringConst), val(v) { }
    virtual ~StringConst() { }
    virtual void PrintNode(ostream &o) { o << "String("<<val.c_str()<<")\n"; }
    std::string GetValue(void) { return val; }
  private:
    std::string val;
};

class EXPR_API BoolConst : public ExprToken
{
  public:
    BoolConst(const Pos &p, const std::string &v) : ExprToken(p, TT_BoolConst), val(v == "true" || v == "on") { }
    virtual ~BoolConst() { }
    virtual void PrintNode(ostream &o) { o << "Bool("<<(val?"true":"false")<<")\n"; }
    bool GetValue(void) { return val; }
  private:
    bool val;
};


#endif
