MacroStream.cpp

Go to the documentation of this file.

// ------------------------------------------------------------------------
// $RCSfile: MacroStream.cpp,v $
// ------------------------------------------------------------------------
// $Revision: 1.1.1.1 $
// ------------------------------------------------------------------------
// Copyright: see Copyright.readme
// ------------------------------------------------------------------------
//
// Class: MacroStream
//   Implements an input buffer for reading tokens from a token list.
//   This string is intended for storing OPAL-9 macros.
//
// ------------------------------------------------------------------------
//
// $Date: 2000/03/27 09:33:43 $
// $Author: Andreas Adelmann $
//
// ------------------------------------------------------------------------
 
#include "OpalParser/MacroStream.h"
#include "OpalParser/Token.h"
 
// Class MacroStream
// ------------------------------------------------------------------------
 
MacroStream::MacroStream(const std::string& macName)
    : TokenStream(macName), body(), curr(body.begin()) {}
 
MacroStream::~MacroStream() {}
 
void MacroStream::append(Token& token) { body.push_back(token); }
 
Token MacroStream::readToken() {
    if (put_back_flag) {
        put_back_flag = false;
        return put_back;
    } else if (curr == body.end()) {
        return Token(stream_name, 1, Token::IS_EOF, "End of macro");
    } else {
        return *curr++;
    }
}
 
void MacroStream::start() {
    curr          = body.begin();
    put_back_flag = false;
}