Function py_node_text

internal/cbm/lsp/py_lsp.c:656–670

/* ── helpers: text + emit ─────────────────────────────────────── */

static char *py_node_text(PyLSPContext *ctx, TSNode node) {
    if (!ctx || ts_node_is_null(node))
        return NULL;
    uint32_t start = ts_node_start_byte(node);
    uint32_t end = ts_node_end_byte(node);
    if (end <= start || (int)end > ctx->source_len)
        return NULL;
    size_t len = (size_t)(end - start);
    char *out = (char *)cbm_arena_alloc(ctx->arena, len + 1);
    if (!out)
        return NULL;
    memcpy(out, ctx->source + start, len);
    out[len] = '\0';
    return out;
}

/* ── lambda + dict-literal-dispatch registries ────────────────── */