From c10df04cf1501b4c196ce6e02b3cddc04387ac1e Mon Sep 17 00:00:00 2001
From: lufia <lufia@lufia.org>
Date: Sun, 11 Jan 2026 11:27:11 +0900
Subject: [PATCH] add WithIgnore option

---
 try.go      | 21 ++++++++++++++++++++-
 try_test.go |  8 ++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/try.go b/try.go
index 812d7be..ce63d1d 100644
--- a/try.go
+++ b/try.go
@@ -1,7 +1,10 @@
 // Package try provides error-handling utilities.
 package try
 
-import "fmt"
+import (
+	"errors"
+	"fmt"
+)
 
 // Checkpoint represents the fallback point.
 type Checkpoint struct {
@@ -39,6 +42,19 @@ func WithDescription(format string, args ...any) Option {
 	}
 }
 
+func WithIgnore(errs ...error) Option {
+	return func(cp *Checkpoint) {
+		cp.handler = func(err error) error {
+			for _, e := range errs {
+				if errors.Is(err, e) {
+					return nil
+				}
+			}
+			return err
+		}
+	}
+}
+
 func waserror(cp *Checkpoint) bool
 func raise(cp *Checkpoint) bool
 func getbp(skip int) uintptr
@@ -58,6 +74,9 @@ func (cp *Checkpoint) raise(skip int, err error) {
 	}
 	if cp.handler != nil {
 		err = cp.handler(err)
+		if err == nil {
+			return
+		}
 	}
 	cp.err = err
 
diff --git a/try_test.go b/try_test.go
index 613096f..c1817d2 100644
--- a/try_test.go
+++ b/try_test.go
@@ -101,6 +101,14 @@ func TestCheck1_onErrorWithDescription(t *testing.T) {
 	gt.String(t, msg).Equal("failed: fake")
 }
 
+func TestCheck1_onErrorWithIgnore(t *testing.T) {
+	cp, err := Handle()
+	if err != nil {
+		t.Errorf("should ignore an error")
+	}
+	Check(fmt.Errorf("fake: %w", errors.ErrUnsupported))(cp, WithIgnore(errors.ErrUnsupported))
+}
+
 func TestCheck2_onError(t *testing.T) {
 	raised := false
 	cp, err := Handle()