Polaris: KeyExpr.h Source File

00001 ///
00002 #ifndef _KEY_EXPR_H
00003 #define _KEY_EXPR_H
00004 ///
00005 /// \class KeyExpr 
00006 /// \brief An expression representing a keyword.
00007 /// \defgroup Polaris
00008 /// \ingroup Polaris
00009 ///  Expression
00010 /// \see Expression/KeyExpr.h
00011 /// \see Expression/KeyExpr.h
00012 ///
00013 /// \endcode
00014 /// \section DESCRIPTION DESCRIPTION
00015 /// It's value can be accessed by the methods data(), str_data(), 
00016 /// and data_ref().  See StringExpr.h for more information about these methods.
00017 ///
00018 #ifdef POLARIS_GNU_PRAGMAS
00019 #pragma interface
00020 #endif
00021 ///
00022 #ifndef _STRING_EXPR_H
00023 #include "StringExpr.h"
00024 #endif
00025 ///
00026 class KeyExpr : public StringExpr {
00027     friend class          ExprTable;
00028 
00029  public:
00030     inline KeyExpr(const char *data_string);
00031     inline KeyExpr(const KeyExpr & e);
00032     virtual ~KeyExpr();
00033 
00034     virtual KeyExpr & operator = (const KeyExpr &);
00035 
00036     virtual Expression *clone() const;
00037     virtual int     structures_OK() const;
00038     virtual void    convert(BinRep & exprSet, Symtab & symtab);
00039     ///< See Expression.h.
00040  
00041     virtual int     exchange_expr( VDL & vdl );
00042     ///< Create a node in the "expression" member and return the index.
00043 
00044  protected:
00045     inline KeyExpr();
00046 };
00047 
00048 
00049 ///< inline implementations
00050 
00051 inline
00052 KeyExpr::KeyExpr() 
00053     : StringExpr(KEY_OP, make_type(LOGICAL_TYPE)) 
00054 {
00055     ///< nothing to do
00056 }
00057 
00058 inline
00059 KeyExpr::KeyExpr(const char *data_string)
00060     : StringExpr(KEY_OP, make_type(VOID_TYPE), data_string)
00061 {
00062     ///< nothing to do
00063 }
00064 
00065 inline
00066 KeyExpr::KeyExpr(const KeyExpr & e)
00067     : StringExpr(e) 
00068 {
00069     ///< nothing to do
00070 }
00071 
00072 #endif