add CallerFuncs helper function (#16)

.github/workflows/test.yaml

@@ -9,7 +9,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.20.x]
+        go-version: [1.22.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:

ctxerr.go

@@ -371,6 +371,15 @@ func CallerFunc(skip int) string {
 	return f
 }
 
+// CallerFuncs is a shortcut for calling CallerFunc many times
+func CallerFuncs(skip, depth int) []string {
+	f := []string{}
+	for i := 0; i < depth; i++ {
+		f = append(f, CallerFunc(skip+i+1))
+	}
+	return f
+}
+
 // AllFields unwraps the error collecting/replacing fields as it goes down the tree
 func AllFields(err error) map[string]any { return global.AllFields(err) }
 func (in Instance) AllFields(err error) map[string]any {

ctxerr_test.go

@@ -337,6 +337,31 @@ func TestCallerFunc(t *testing.T) {
 	}
 }
 
+func testCallerA(skip, depth int) []string { return ctxerr.CallerFuncs(skip, depth) }
+func testCallerB(skip, depth int) []string { return testCallerA(skip, depth) }
+func testCallerC(skip, depth int) []string { return testCallerB(skip, depth) }
+
+func TestCallerFuncs(t *testing.T) {
+	fns := testCallerC(0, 3)
+	expected := []string{
+		"ctxerr_test.testCallerA",
+		"ctxerr_test.testCallerB",
+		"ctxerr_test.testCallerC",
+	}
+	if fmt.Sprint(fns) != fmt.Sprint(expected) {
+		t.Error("Did not match expected", fns, expected)
+	}
+
+	fns = testCallerC(1, 2)
+	expected = []string{
+		"ctxerr_test.testCallerB",
+		"ctxerr_test.testCallerC",
+	}
+	if fmt.Sprint(fns) != fmt.Sprint(expected) {
+		t.Error("Did not match expected", fns, expected)
+	}
+}
+
 func TestLocation(t *testing.T) {
 	tests := []struct {
 		name            string

go.mod

@@ -1,3 +1,3 @@
 module github.com/mvndaai/ctxerr
 
-go 1.20
+go 1.22