Function register_function

internal/cbm/lsp/rust_rustdoc.c:165–195

Register a function item: figure out the receiver QN (if any), the * short name, and the return type. */

/* Register a function item: figure out the receiver QN (if any), the
 * short name, and the return type. */
static bool register_function(CBMTypeRegistry* reg, CBMArena* arena,
    const char* short_name, const char* full_qn, const char* receiver,
    yyjson_val* function_obj, const char* crate_qn) {
    if (!short_name || !full_qn) return false;
    CBMRegisteredFunc rf;
    memset(&rf, 0, sizeof(rf));
    rf.qualified_name = full_qn;
    rf.short_name = short_name;
    rf.receiver_type = receiver;
    rf.min_params = -1;

    /* Return type — rustdoc's `function.decl.output` may be omitted
     * (implicit unit). */
    const CBMType* ret = cbm_type_builtin(arena, "()");
    if (function_obj && yyjson_is_obj(function_obj)) {
        yyjson_val* decl = yyjson_obj_get(function_obj, "decl");
        if (decl && yyjson_is_obj(decl)) {
            yyjson_val* out = yyjson_obj_get(decl, "output");
            if (out && !yyjson_is_null(out)) {
                ret = parse_rustdoc_type(out, arena, crate_qn);
            }
        }
    }
    const CBMType** ra = (const CBMType**)cbm_arena_alloc(arena,
        2 * sizeof(const CBMType*));
    ra[0] = ret;
    ra[1] = NULL;
    rf.signature = cbm_type_func(arena, NULL, NULL, ra);
    cbm_registry_add_func(reg, rf);
    return true;
}

int cbm_rust_rustdoc_ingest(CBMTypeRegistry* reg, CBMArena* arena,
    const char* json, int json_len, const char* crate_qn) {