Function gc_describe_impl

src/ast/ast_gc_report.cpp:46–53

    // ---- describe hook (installed into gc_node base) ----

    static void gc_describe_impl ( const gc_node * node, char * buf, int buflen ) {
        const LineInfo * li = gc_node_at(node);
        if ( li && li->fileInfo ) {
            snprintf(buf, buflen, "%s:%u:%u", li->fileInfo->name.c_str(), li->line, li->column);
        } else {
            buf[0] = 0;
        }
    }

    // The hook variable is statically zero-initialized before any dynamic init, so setting
    // it here (dynamic init) has no ordering hazard. gc_report is a manual diagnostic and is