add TypeFullName option to print type full name

_assertauto/TestConfig/TypeFullName.json

@@ -0,0 +1,10 @@
+{
+	"entries": [
+		{
+			"equal": "(github.com/pierrre/pretty_test.testStruct) {\n\tFoo: (int) 123,\n\tBar: (float64) 123.456,\n\tunexported: (int) 123,\n}"
+		},
+		{
+			"equal": 0
+		}
+	]
+}

pretty.go

@@ -14,6 +14,7 @@ import (
 	"unsafe" //nolint:depguard // Required for string to []byte conversion.
 
 	"github.com/pierrre/go-libs/bufpool"
+	"github.com/pierrre/go-libs/reflectutil"
 	"github.com/pierrre/go-libs/strconvio"
 )
 
@@ -39,6 +40,9 @@ var DefaultConfig = NewConfig()
 //
 // It should be created with [NewConfig].
 type Config struct {
+	// TypeFullName prints the full type name if true.
+	// Default: false.
+	TypeFullName bool
 	// Indent is the string used to indent.
 	// Default: "\t".
 	Indent string
@@ -178,7 +182,13 @@ func (c *Config) writeTypeAndValue(w io.Writer, st *State, v reflect.Value) {
 }
 
 func (c *Config) writeType(w io.Writer, typ reflect.Type) {
-	_, _ = writeString(w, typ.String())
+	var s string
+	if c.TypeFullName {
+		s = reflectutil.TypeFullName(typ)
+	} else {
+		s = typ.String()
+	}
+	_, _ = writeString(w, s)
 }
 
 func (c *Config) writeValue(w io.Writer, st *State, v reflect.Value) {

pretty_test.go

@@ -295,6 +295,17 @@ var testCases = []testCase{
 			c.StructUnexported = false
 		},
 	},
+	{
+		name: "TypeFullName",
+		value: testStruct{
+			Foo:        123,
+			Bar:        123.456,
+			unexported: 123,
+		},
+		configure: func(c *Config) {
+			c.TypeFullName = true
+		},
+	},
 	{
 		name: "MaxDepth",
 		value: func() any {