feat: add objectLen() to 5.1 api

natecraddock · natecraddock · commit 53fc70674495 · 2023-02-15T22:06:59.000-07:00
diff --git a/src/ziglua-5.1/lib.zig b/src/ziglua-5.1/lib.zig
@@ -647,6 +647,12 @@ pub const Lua = struct {
         return c.lua_next(lua.state, index) != 0;
     }
 
+    /// Returns the length of the value at the given index
+    /// See https://www.lua.org/manual/5.1/manual.html#lua_objlen
+    pub fn objectLen(lua: *Lua, index: i32) usize {
+        return c.lua_objlen(lua.state, index);
+    }
+
     /// Calls a function (or callable object) in protected mode
     /// NOTE: it might be good to make the args named struct params?
     pub fn protectedCall(lua: *Lua, num_args: i32, num_results: i32, msg_handler: i32) !void {
diff --git a/src/ziglua-5.1/tests.zig b/src/ziglua-5.1/tests.zig
@@ -1148,3 +1148,11 @@ test "function environments" {
     lua.getField(2, "x");
     try testing.expectEqual(@as(Integer, 20), lua.toInteger(3));
 }
+
+test "objectLen" {
+    var lua = try Lua.init(testing.allocator);
+    defer lua.deinit();
+
+    lua.pushString("lua");
+    try testing.expectEqual(@as(usize, 3), lua.objectLen(-1));
+}
