add StringGetterFunc

stringgetterfunc.go

@@ -0,0 +1,19 @@
+package jaws
+
+type stringGetterFunc struct {
+	fn   func(*Element) string
+	tags []any
+}
+
+func (g *stringGetterFunc) JawsGet(e *Element) string {
+	return g.fn(e)
+}
+
+func (g *stringGetterFunc) JawsGetTag(e *Request) any {
+	return g.tags
+}
+
+// StringGetterFunc wraps a function and returns a Getter[string]
+func StringGetterFunc(fn func(elem *Element) (s string), tags ...any) Getter[string] {
+	return &stringGetterFunc{fn: fn, tags: tags}
+}

stringgetterfunc_test.go

@@ -0,0 +1,19 @@
+package jaws
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestStringGetterFunc(t *testing.T) {
+	tt := &testSelfTagger{}
+	sg := StringGetterFunc(func(e *Element) string {
+		return "foo"
+	}, tt)
+	if s := sg.JawsGet(nil); s != "foo" {
+		t.Error(s)
+	}
+	if tags := MustTagExpand(nil, sg); !reflect.DeepEqual(tags, []any{tt}) {
+		t.Error(tags)
+	}
+}