609       : properties_(0), type_("null"), isymbols_(0), osymbols_(0) {}  in FstImpl()
613         isymbols_(impl.isymbols_ ? impl.isymbols_->Copy() : 0),  in FstImpl()
617     delete isymbols_;  in ~FstImpl()  local
646   const SymbolTable* InputSymbols() const { return isymbols_; }  in InputSymbols()
650   SymbolTable* InputSymbols() { return isymbols_; }  in InputSymbols()
655     if (isymbols_) delete isymbols_;  in SetInputSymbols()  local
656     isymbols_ = isyms ? isyms->Copy() : 0;  in SetInputSymbols()
695       if (isymbols_ && opts.write_isymbols)  in WriteHeader()
704     if (isymbols_ && opts.write_isymbols) isymbols_->Write(strm);  in WriteHeader()
772   SymbolTable *isymbols_;       // Ilabel symbol table  variable
812     isymbols_ = SymbolTable::Read(strm, opts.source);  in ReadHeader()
817     delete isymbols_;  in ReadHeader()  local
818     isymbols_ = opts.isymbols->Copy();  in ReadHeader()