detail.h

// SPDX-FileCopyrightText: 2025-2026 Metehan Selvi <me@metehanselvi.com>
//
// SPDX-License-Identifier: LGPL-2.1-or-later
 
/* Public-facing implementation details (unstable). */
 
#ifndef RDESC_DETAIL_H
#define RDESC_DETAIL_H
#include <stddef.h>
#include <stdint.h>
 
 
// To suppress clangd's false-positive pragma warning
// See https://github.com/clangd/clangd/issues/1167
void _rdesc_priv_dummy_declaration(void);
 
 
#if defined(__GNUC__) || defined(__clang__)
#define _rdesc_wur __attribute__((warn_unused_result))
#else
#define _rdesc_wur
#endif
 
 
/* These structs are private and should only be accessed via the provided
 * CST macros. */
 
#pragma pack(push, 1)
 
struct _rdesc_priv_tk {
        uint16_t _pad : 1;
        uint16_t id : 15;
 
        uint32_t seminfo  /* Semantic info starts here and extends into
                           * the flexible array member in _rdesc_priv_node. */;
};
 
struct _rdesc_priv_nt {
        uint16_t _pad : 1;
        uint16_t id : 15;
 
        uint16_t alt_idx;
        uint16_t child_count;
};
 
struct _rdesc_priv_node {
        /* ALSO CHANGE sizeof_node macro for any change in this struct. */
        size_t parent  /* Index of parent. */;
        uint16_t unwind_size  /* Previous node's unwind size (for backward
                               * navigation on the stack). */;
 
        union {
                uint16_t ty : 1  /* 0 for token and 1 for nonterminal. */;
 
                struct _rdesc_priv_tk tk;
                struct _rdesc_priv_nt nt;
        } n;
};
 
#pragma pack(pop)
 
 
#endif