---

Symbol.cpp

#define TRACE_NAME "Symbol"
#include "Symbol.h"

//
//  Standard Member Functions
//

SymbolTable Symbol::global;
const Symbol Symbol::null(Symbol::NULL_SYMBOL, "");
static int bindingLoopCount = 0;

Symbol::Symbol(Type type, const char* text) 
{
    if (type == NULL_SYMBOL) { _table = 0; _index = 0; return; }
    _table = &global;
    _index = _table->lookupOrAdd(type, text);
}

std::ostream& Symbol::print_to(std::ostream& stream) const {
    switch (getType()) {
    case NULL_SYMBOL:
    assert(_table == 0);
    stream << "-null-";
    break;
    case CONSTANT:
    assert(_table == &global);
    stream << "<" << text() << ">";
    break;
    case LITERAL:
    // should do quoting...
    assert(_table == &global);
    stream << "\"" << text() << "\"";
    break;
    case VARIABLE:
    //stream << "_" << _table->getTableNumber() << "_" << _index;
    stream << "_";
    {
        const char* t = text();
        if (t) stream << ":" << t;
        // move this stuff into another version of print_to!
#if 0
        if (isBound()) {
        if (bindingLoopCount) {    // NOT THREAD SAFE
            if (bindingLoopCount++ > 4) {
            stream << "=...";
            goto donePrinting;
            }
        } else {
            bindingLoopCount = 1;
        }
        stream << "=" << getBinding();
        donePrinting:
        bindingLoopCount--;
        }
#endif
    }
    break;
    default:
    NOT_IMPLEMENTED;
    }
    return stream;
}


//
//  Additional Public Member Functions
//



//
//  Additional Private Member Functions
//
#undef TRACE_NAME

---

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