Function ts_nstack_push

internal/cbm/extract_node_stack.h:33–47

Push a node onto the stack, growing 2x if needed. */

/* Push a node onto the stack, growing 2x if needed. */
static inline void ts_nstack_push(TSNodeStack *s, CBMArena *arena, TSNode node) {
    if (s->count >= s->cap) {
        int new_cap = s->cap ? s->cap * 2 : 512;
        TSNode *new_items = (TSNode *)cbm_arena_alloc(arena, (size_t)new_cap * sizeof(TSNode));
        if (!new_items)
            return; /* OOM: best-effort, stop growing */
        if (s->items && s->count > 0) {
            memcpy(new_items, s->items, (size_t)s->count * sizeof(TSNode));
        }
        /* Old s->items is abandoned in the arena — freed on arena_destroy. */
        s->items = new_items;
        s->cap = new_cap;
    }
    s->items[s->count++] = node;
}

/* Pop a node from the stack. Caller must check s->count > 0. */
static inline TSNode ts_nstack_pop(TSNodeStack *s) {