fix: create zig errror wrapper

src/Duration.zig

@@ -216,27 +216,27 @@ fn roundWithProvider(self: Duration, options: RoundingOptions, relative_to: Rela
 /// Compare two durations (Temporal.Duration.compare).
 pub fn compare(self: Duration, other: Duration, relative_to: RelativeTo) !i8 {
     const res = abi.c.temporal_rs_Duration_compare(self._inner, other._inner, relative_to.toCApi());
-    return abi.success(res) orelse return error.TemporalError;
+    return try abi.extractResult(res);
 }
 
 /// Compare two durations with an explicit provider.
 fn compareWithProvider(self: Duration, other: Duration, relative_to: RelativeTo, provider: *const abi.c.Provider) !i8 {
     const res = abi.c.temporal_rs_Duration_compare_with_provider(self._inner, other._inner, relative_to.toCApi(), provider);
-    return abi.success(res) orelse return error.TemporalError;
+    return try abi.extractResult(res);
 }
 
 /// Get the total value of the duration in the specified unit (Temporal.Duration.prototype.total).
 pub fn total(self: Duration, options: TotalOptions) !f64 {
     const rel = if (options.relative_to) |r| r.toCApi() else abi.c.RelativeTo{ .date = null, .zoned = null };
     const res = abi.c.temporal_rs_Duration_total(self._inner, options.unit.toCApi(), rel);
-    return abi.success(res) orelse return error.TemporalError;
+    return try abi.extractResult(res);
 }
 
 /// Get the total value of the duration with an explicit provider.
 fn totalWithProvider(self: Duration, options: TotalOptions, provider: *const abi.c.Provider) !f64 {
     const rel = if (options.relative_to) |r| r.toCApi() else abi.c.RelativeTo{ .date = null, .zoned = null };
     const res = abi.c.temporal_rs_Duration_total_with_provider(self._inner, options.unit.toCApi(), rel, provider);
-    return abi.success(res) orelse return error.TemporalError;
+    return try abi.extractResult(res);
 }
 
 /// Convert to string (Temporal.Duration.prototype.toString); caller owns returned slice.
@@ -272,12 +272,12 @@ pub fn deinit(self: Duration) void {
 
 // --- Helpers -----------------------------------------------------------------
 
-fn handleVoidResult(res: anytype) !void {
-    _ = abi.success(res) orelse return error.TemporalError;
+inline fn handleVoidResult(res: anytype) !void {
+    _ = try abi.extractResult(res);
 }
 
 fn wrapDuration(res: anytype) !Duration {
-    const ptr = (abi.success(res) orelse return error.TemporalError) orelse return error.TemporalError;
+    const ptr = (try abi.extractResult(res)) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
 
@@ -431,3 +431,28 @@ test clone {
 
     try std.testing.expectEqual(dur.hours(), cloned.hours());
 }
+
+test total {
+    {
+        const dur = try Duration.init(0, 0, 0, 0, 1, 30, 0, 0, 0, 0);
+        defer dur.deinit();
+
+        const t = try dur.total(.{ .unit = .hour });
+        try std.testing.expectEqual(1.5, t);
+    }
+    {
+        const dur = try Duration.from("PT4H5M6S");
+        defer dur.deinit();
+
+        const t = try dur.total(.{ .unit = .hour });
+        try std.testing.expectEqual(4.085, t);
+    }
+
+    {
+        // Calendar units require relative_to; the C API will return RangeError.
+        const dur = try Duration.from("P1Y");
+        defer dur.deinit();
+
+        try std.testing.expectError(error.RangeError, dur.total(.{ .unit = .day }));
+    }
+}

src/PlainDate.zig

@@ -152,13 +152,6 @@ pub fn toZonedDateTime(self: PlainDate, options: ToZonedDateTimeOptions) !ZonedD
     const time_ptr = if (options.plain_time) |t| t._inner else null;
     const ptr = (abi.success(abi.c.temporal_rs_PlainDate_to_zoned_date_time(self._inner, time_zone, time_ptr)) orelse return error.TemporalError) orelse return error.TemporalError;
 
-    // Get time zone identifier for ZonedDateTime
-    // const allocator = std.heap.page_allocator;
-    // var write = abi.DiplomatWrite.init(allocator);
-    // defer write.deinit();
-    // abi.c.temporal_rs_TimeZone_identifier(time_zone, &write.inner);
-    // const tz_id = try write.toOwnedSlice();
-
     return .{ ._inner = ptr };
 }
 
@@ -285,12 +278,6 @@ pub fn deinit(self: PlainDate) void {
 fn wrapPlainDate(res: anytype) !PlainDate {
     const ptr = (abi.success(res) orelse return error.TemporalError) orelse return error.TemporalError;
 
-    // const calendar_ptr = abi.c.temporal_rs_PlainDate_calendar(ptr) orelse return error.TemporalError;
-    // const cal_id_view = abi.c.temporal_rs_Calendar_identifier(calendar_ptr);
-
-    // const allocator = std.heap.page_allocator;
-    // const cal_id = allocator.dupe(u8, cal_id_view.data[0..cal_id_view.len]) catch "iso8601";
-
     return .{ ._inner = ptr };
 }
 

src/abi.zig

@@ -261,3 +261,39 @@ pub fn Success(comptime Result: type) type {
     if (!@hasField(Union, "ok")) return void;
     return @FieldType(Union, "ok");
 }
+
+/// Temporal error set mapping to C API error kinds
+pub const TemporalError = error{
+    /// Generic temporal error
+    Generic,
+    /// Type error (invalid type or conversion)
+    TypeError,
+    /// Range error (value out of valid range)
+    RangeError,
+    /// Syntax error (invalid format or parsing)
+    SyntaxError,
+    /// Assertion failed (should not happen)
+    AssertionFailed,
+    /// Other unspecified error
+    Unknown,
+};
+
+/// Extract result from C API, mapping errors to specific Zig error types.
+pub inline fn extractResult(result: anytype) TemporalError!Success(@TypeOf(result)) {
+    if (success(result)) |value| return value;
+
+    const err = result.unnamed_0.err;
+    // const message = if (fromOption(err.msg)) |sv|
+    //     fromDiplomatStringView(sv)
+    // else
+    //     "(no error message)";
+
+    return switch (err.kind) {
+        c.ErrorKind_Generic => TemporalError.Generic,
+        c.ErrorKind_Type => TemporalError.TypeError,
+        c.ErrorKind_Range => TemporalError.RangeError,
+        c.ErrorKind_Syntax => TemporalError.SyntaxError,
+        c.ErrorKind_Assert => @panic("temporal_rs assertion failed"),
+        else => TemporalError.Unknown,
+    };
+}