wrap lines

fprint.go

@@ -0,0 +1,168 @@
+package notation
+
+import (
+	"fmt"
+	"io"
+)
+
+type writer struct {
+	w   io.Writer
+	n   int
+	err error
+}
+
+func (w *writer) write(o interface{}) {
+	if w.err != nil {
+		return
+	}
+
+	n, err := fmt.Fprint(w.w, o)
+	w.n += n
+	w.err = err
+}
+
+func nodeLen(t int, n node) node {
+	var w int
+	for i, p := range n.parts {
+		switch part := p.(type) {
+		case string:
+			n.len += len(part)
+			w += len(part)
+		case node:
+			part = nodeLen(t, part)
+			n.parts[i] = part
+			n.len += part.len
+			if part.len == part.wlen {
+				w += part.len
+			} else {
+				w += part.wlen0
+				if w > n.wlen {
+					n.wlen = w
+				}
+
+				if part.wlen > n.wlen {
+					n.wlen = part.wlen
+				}
+
+				if n.wlen0 == 0 {
+					n.wlen0 = w
+				}
+
+				w = part.wlenLast
+			}
+		case wrapper:
+			if len(part.items) == 0 {
+				continue
+			}
+
+			if w > n.wlen {
+				n.wlen = w
+			}
+
+			if n.wlen0 == 0 {
+				n.wlen0 = w
+			}
+
+			w = 0
+			for j, ni := range part.items {
+				ni = nodeLen(t, ni)
+				part.items[j] = ni
+				n.len += ni.len
+				wni := t + ni.len + len(part.suffix)
+				if wni > w {
+					w = wni
+				}
+			}
+
+			if len(part.items) > 0 {
+				n.len += (len(part.items) - 1) * len(part.sep)
+			}
+
+			w = 0
+		}
+	}
+
+	if w > n.wlen {
+		n.wlen = w
+	}
+
+	if n.wlen0 == 0 {
+		n.wlen0 = w
+	}
+
+	n.wlenLast = w
+	return n
+}
+
+func wrapNode(t, c0, c1 int, n node) node {
+	if n.len <= c0 || n.wlen == n.len {
+		return n
+	}
+
+	if n.len <= c1 && n.len-c0 <= n.wlen {
+		return n
+	}
+
+	n.wrap = true
+	if n.wlen <= c0 {
+		return n
+	}
+
+	for i, p := range n.parts {
+		switch part := p.(type) {
+		case node:
+			n.parts[i] = wrapNode(t, c0, c1, part)
+		case wrapper:
+			for j := range part.items {
+				part.items[j] = wrapNode(
+					t,
+					c0-t,
+					c1-t,
+					part.items[j],
+				)
+			}
+		}
+	}
+
+	return n
+}
+
+func fprint(w *writer, t int, n node) {
+	if w.err != nil {
+		return
+	}
+
+	for i := 0; i < t; i++ {
+		w.write("\t")
+	}
+
+	for _, p := range n.parts {
+		switch part := p.(type) {
+		case node:
+			fprint(w, 0, part)
+		case wrapper:
+			if len(part.items) == 0 {
+				continue
+			}
+
+			if n.wrap {
+				w.write("\n")
+			}
+
+			for i, ni := range part.items {
+				if n.wrap {
+					fprint(w, t+1, ni)
+					w.write(part.suffix)
+					w.write("\n")
+				} else {
+					fprint(w, 0, ni)
+					if i < len(part.items)-1 {
+						w.write(part.sep)
+					}
+				}
+			}
+		default:
+			w.write(part)
+		}
+	}
+}

notation.go

@@ -1,7 +1,11 @@
 package notation
 
 import (
+	"bytes"
+	"io"
+	"os"
 	"reflect"
+	"strconv"
 	"strings"
 )
 
@@ -16,23 +20,102 @@ const (
 	allTypes
 )
 
-func sprintValues(o opts, v []interface{}) string {
+type node struct {
-	s := make([]string, len(v))
+	len, wlen, wlen0, wlenLast int
-	for i := range v {
+	wrap                       bool
-		if v[i] == nil {
+	parts                      []interface{}
-			s[i] = "nil"
+}
+
+type wrapper struct {
+	sep, suffix string
+	items       []node
+}
+
+func nodeOf(parts ...interface{}) node {
+	return node{parts: parts}
+}
+
+func config(name string, dflt int) int {
+	s := os.Getenv(name)
+	if s == "" {
+		s = os.Getenv(strings.ToLower(name))
+	}
+
+	if s == "" {
+		return dflt
+	}
+
+	v, err := strconv.Atoi(s)
+	if err != nil {
+		return dflt
+	}
+
+	return v
+}
+
+func fprintValues(w io.Writer, o opts, v []interface{}) (int, error) {
+	tab := config("TABWIDTH", 8)
+	cols0 := config("LINEWIDTH", 80-8)
+	cols1 := config("LINEWIDTH1", (cols0+8)*3/2-8)
+	wr := &writer{w: w}
+	for i, vi := range v {
+		if wr.err != nil {
+			return wr.n, wr.err
+		}
+
+		if i > 0 {
+			if o&wrap == 0 {
+				wr.write(" ")
+			} else {
+				wr.write("\n")
+			}
+		}
+
+		if vi == nil {
+			fprint(wr, 0, nodeOf("nil"))
 			continue
 		}
 
-		s[i] = sprint(o, reflect.ValueOf(v[i]))
+		n := reflectValue(o, reflect.ValueOf(vi))
-	}
-
-	sep := " "
 		if o&wrap != 0 {
-		sep = "\n"
+			n = nodeLen(tab, n)
+			n = wrapNode(tab, cols0, cols1, n)
 		}
 
-	return strings.Join(s, sep)
+		fprint(wr, 0, n)
+	}
+
+	return wr.n, wr.err
+}
+
+func sprintValues(o opts, v []interface{}) string {
+	var b bytes.Buffer
+	fprintValues(&b, o, v)
+	return b.String()
+}
+
+func Fprint(w io.Writer, v ...interface{}) (int, error) {
+	return fprintValues(w, none, v)
+}
+
+func Fprintw(w io.Writer, v ...interface{}) (int, error) {
+	return fprintValues(w, wrap, v)
+}
+
+func Fprintt(w io.Writer, v ...interface{}) (int, error) {
+	return fprintValues(w, types, v)
+}
+
+func Fprintwt(w io.Writer, v ...interface{}) (int, error) {
+	return fprintValues(w, wrap|types, v)
+}
+
+func Fprintv(w io.Writer, v ...interface{}) (int, error) {
+	return fprintValues(w, allTypes, v)
+}
+
+func Fprintwv(w io.Writer, v ...interface{}) (int, error) {
+	return fprintValues(w, wrap|allTypes, v)
 }
 
 func Sprint(v ...interface{}) string {

reflect.go

@@ -0,0 +1,308 @@
+package notation
+
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+	"sort"
+)
+
+func withType(o opts) (opts, bool, bool) {
+	if o&types == 0 && o&allTypes == 0 {
+		return o, false, false
+	}
+
+	if o&skipTypes != 0 && o&allTypes == 0 {
+		return o &^ skipTypes, false, false
+	}
+
+	return o, true, o&allTypes != 0
+}
+
+func reflectPrimitive(o opts, r reflect.Value, v interface{}, suppressType ...string) node {
+	s := fmt.Sprint(v)
+	if s[0] == '(' && s[len(s)-1] == ')' {
+		s = s[1 : len(s)-1]
+	}
+
+	_, t, a := withType(o)
+	if !t {
+		return nodeOf(s)
+	}
+
+	tn := reflectType(r.Type())
+	if a {
+		return nodeOf(tn, "(", s, ")")
+	}
+
+	for _, suppress := range suppressType {
+		if tn.parts[0] != suppress {
+			continue
+		}
+
+		return nodeOf(s)
+	}
+
+	return nodeOf(tn, "(", s, ")")
+}
+
+func reflectNil(o opts, r reflect.Value) node {
+	if _, _, a := withType(o); !a {
+		return nodeOf("nil")
+	}
+
+	return nodeOf(reflectType(r.Type()), "(nil)")
+}
+
+func reflectItems(o opts, prefix string, r reflect.Value) node {
+	items := wrapper{sep: ", ", suffix: ","}
+	itemOpts := o | skipTypes
+	for i := 0; i < r.Len(); i++ {
+		items.items = append(
+			items.items,
+			reflectValue(itemOpts, r.Index(i)),
+		)
+	}
+
+	if _, t, _ := withType(o); !t {
+		return nodeOf(prefix, "{", items, "}")
+	}
+
+	return nodeOf(reflectType(r.Type()), "{", items, "}")
+}
+
+func reflectHidden(o opts, hidden string, r reflect.Value) node {
+	if r.IsNil() {
+		return reflectNil(o, r)
+	}
+
+	if _, t, _ := withType(o); !t {
+		return nodeOf(hidden)
+	}
+
+	return reflectType(r.Type())
+}
+
+func reflectArray(o opts, r reflect.Value) node {
+	return reflectItems(o, fmt.Sprintf("[%d]", r.Len()), r)
+}
+
+func reflectChan(o opts, r reflect.Value) node {
+	return reflectHidden(o, "chan", r)
+}
+
+func reflectFunc(o opts, r reflect.Value) node {
+	return reflectHidden(o, "func()", r)
+}
+
+func reflectInterface(o opts, r reflect.Value) node {
+	if r.IsNil() {
+		return reflectNil(o, r)
+	}
+
+	e := reflectValue(o, r.Elem())
+	if _, t, _ := withType(o); !t {
+		return e
+	}
+
+	return nodeOf(
+		reflectType(r.Type()),
+		"(",
+		wrapper{items: []node{e}},
+		")",
+	)
+}
+
+func reflectMap(o opts, r reflect.Value) node {
+	if r.IsNil() {
+		return reflectNil(o, r)
+	}
+
+	var (
+		nkeys []node
+		skeys []string
+	)
+
+	items := wrapper{sep: ", ", suffix: ","}
+	itemOpts := o | skipTypes
+	keys := r.MapKeys()
+	sv := make(map[string]reflect.Value)
+	sn := make(map[string]node)
+	for _, key := range keys {
+		var b bytes.Buffer
+		nk := reflectValue(itemOpts, key)
+		nkeys = append(nkeys, nk)
+		wr := writer{w: &b}
+		fprint(&wr, 0, nk)
+		skey := b.String()
+		skeys = append(skeys, skey)
+		sv[skey] = key
+		sn[skey] = nk
+	}
+
+	sort.Strings(skeys)
+	for _, skey := range skeys {
+		items.items = append(
+			items.items,
+			nodeOf(
+				sn[skey],
+				": ",
+				reflectValue(itemOpts, r.MapIndex(sv[skey])),
+			),
+		)
+	}
+
+	if _, t, _ := withType(o); !t {
+		return nodeOf("map{", items, "}")
+	}
+
+	return nodeOf(reflectType(r.Type()), "{", items, "}")
+}
+
+func reflectPointer(o opts, r reflect.Value) node {
+	if r.IsNil() {
+		return reflectNil(o, r)
+	}
+
+	e := reflectValue(o, r.Elem())
+	if _, t, _ := withType(o); !t {
+		return e
+	}
+
+	return nodeOf("*", e)
+}
+
+func reflectList(o opts, r reflect.Value) node {
+	if r.IsNil() {
+		return reflectNil(o, r)
+	}
+
+	return reflectItems(o, "[]", r)
+}
+
+func reflectString(o opts, r reflect.Value) node {
+	b := []byte(r.String())
+	e := make([]byte, 0, len(b))
+	for _, c := range b {
+		switch c {
+		case '\\':
+			e = append(e, '\\', '\\')
+		case '"':
+			e = append(e, '\\', '"')
+		case '\b':
+			e = append(e, '\\', 'b')
+		case '\f':
+			e = append(e, '\\', 'f')
+		case '\n':
+			e = append(e, '\\', 'n')
+		case '\r':
+			e = append(e, '\\', 'r')
+		case '\t':
+			e = append(e, '\\', 't')
+		case '\v':
+			e = append(e, '\\', 'v')
+		default:
+			e = append(e, c)
+		}
+	}
+
+	s := fmt.Sprintf("\"%s\"", string(e))
+	_, t, a := withType(o)
+	if !t {
+		return nodeOf(s)
+	}
+
+	tn := reflectType(r.Type())
+	if !a && tn.parts[0] == "string" {
+		return nodeOf(s)
+	}
+
+	return nodeOf(tn, "(", wrapper{items: []node{nodeOf(s)}}, ")")
+}
+
+func reflectStruct(o opts, r reflect.Value) node {
+	wr := wrapper{sep: ", "}
+
+	fieldOpts := o | skipTypes
+	rt := r.Type()
+	for i := 0; i < r.NumField(); i++ {
+		name := rt.Field(i).Name
+		wr.items = append(
+			wr.items,
+			nodeOf(
+				name,
+				": ",
+				reflectValue(
+					fieldOpts,
+					r.FieldByName(name),
+				),
+			),
+		)
+	}
+
+	if _, t, _ := withType(o); !t {
+		return nodeOf("{", wr, "}")
+	}
+
+	return nodeOf(reflectType(rt), "{", wr, "}")
+}
+
+func reflectUnsafePointer(o opts, r reflect.Value) node {
+	if r.IsNil() {
+		return reflectNil(o, r)
+	}
+
+	if _, _, a := withType(o); !a {
+		return nodeOf("pointer")
+	}
+
+	return nodeOf(reflectType(r.Type()), "(pointer)")
+}
+
+func reflectValue(o opts, r reflect.Value) node {
+	switch r.Kind() {
+	case reflect.Bool:
+		return reflectPrimitive(o, r, r.Bool(), "bool")
+	case
+		reflect.Int,
+		reflect.Int8,
+		reflect.Int16,
+		reflect.Int32,
+		reflect.Int64:
+		return reflectPrimitive(o, r, r.Int(), "int")
+	case
+		reflect.Uint,
+		reflect.Uint8,
+		reflect.Uint16,
+		reflect.Uint32,
+		reflect.Uint64,
+		reflect.Uintptr:
+		return reflectPrimitive(o, r, r.Uint())
+	case reflect.Float32, reflect.Float64:
+		return reflectPrimitive(o, r, r.Float())
+	case reflect.Complex64, reflect.Complex128:
+		return reflectPrimitive(o, r, r.Complex())
+	case reflect.Array:
+		return reflectArray(o, r)
+	case reflect.Chan:
+		return reflectChan(o, r)
+	case reflect.Func:
+		return reflectFunc(o, r)
+	case reflect.Interface:
+		return reflectInterface(o, r)
+	case reflect.Map:
+		return reflectMap(o, r)
+	case reflect.Ptr:
+		return reflectPointer(o, r)
+	case reflect.Slice:
+		return reflectList(o, r)
+	case reflect.String:
+		return reflectString(o, r)
+	case reflect.Struct:
+		return reflectStruct(o, r)
+	case reflect.UnsafePointer:
+		return reflectUnsafePointer(o, r)
+	default:
+		return nodeOf("<invalid>")
+	}
+}

reflecttype.go

@@ -0,0 +1,129 @@
+package notation
+
+import (
+	"reflect"
+)
+
+func reflectFuncBaseType(t reflect.Type) node {
+	args := func(num func() int, typ func(int) reflect.Type) []node {
+		var t []node
+		for i := 0; i < num(); i++ {
+			t = append(t, reflectType(typ(i)))
+		}
+
+		return t
+	}
+
+	in := args(t.NumIn, t.In)
+	out := args(t.NumOut, t.Out)
+
+	n := nodeOf("(")
+	if len(in) == 1 {
+		n.parts = append(n.parts, in[0])
+	} else if len(in) > 1 {
+		n.parts = append(n.parts, wrapper{sep: ", ", items: in})
+	}
+
+	n.parts = append(n.parts, ")")
+	if len(out) == 1 {
+		n.parts = append(n.parts, " ", out[0])
+	} else if len(out) > 1 {
+		n.parts = append(n.parts, " (", wrapper{sep: ", ", items: out}, ")")
+	}
+
+	return n
+}
+
+func reflectArrayType(t reflect.Type) node {
+	return nodeOf("[", t.Len(), "]", reflectType(t.Elem()))
+}
+
+func reflectChanType(t reflect.Type) node {
+	var prefix string
+	switch t.ChanDir() {
+	case reflect.RecvDir:
+		prefix = "<-chan "
+	case reflect.SendDir:
+		prefix = "chan<- "
+	default:
+		prefix = "chan "
+	}
+
+	return nodeOf(prefix, reflectType(t.Elem()))
+}
+
+func reflectFuncType(t reflect.Type) node {
+	return nodeOf("func", reflectFuncBaseType(t))
+}
+
+func reflectInterfaceType(t reflect.Type) node {
+	wr := wrapper{sep: "; "}
+	for i := 0; i < t.NumMethod(); i++ {
+		method := t.Method(i)
+		wr.items = append(
+			wr.items,
+			nodeOf(
+				method.Name,
+				reflectFuncBaseType(method.Type),
+			),
+		)
+	}
+
+	return nodeOf("interface{", wr, "}")
+}
+
+func reflectMapType(t reflect.Type) node {
+	return nodeOf("map[", reflectType(t.Key()), "]", reflectType(t.Elem()))
+}
+
+func reflectPointerType(t reflect.Type) node {
+	return nodeOf("*", reflectType(t.Elem()))
+}
+
+func reflectListType(t reflect.Type) node {
+	return nodeOf("[]", reflectType(t.Elem()))
+}
+
+func reflectStructType(t reflect.Type) node {
+	wr := wrapper{sep: "; "}
+	for i := 0; i < t.NumField(); i++ {
+		fi := t.Field(i)
+		wr.items = append(
+			wr.items,
+			nodeOf(
+				fi.Name,
+				" ",
+				reflectType(fi.Type),
+			),
+		)
+	}
+
+	return nodeOf("struct{", wr, "}")
+}
+
+func reflectType(t reflect.Type) node {
+	if t.Name() != "" {
+		return nodeOf(t.Name())
+	}
+
+	switch t.Kind() {
+	case reflect.Array:
+		return reflectArrayType(t)
+	case reflect.Chan:
+		return reflectChanType(t)
+	case reflect.Func:
+		return reflectFuncType(t)
+	case reflect.Interface:
+		return reflectInterfaceType(t)
+	case reflect.Map:
+		return reflectMapType(t)
+	case reflect.Ptr:
+		return reflectPointerType(t)
+	case reflect.Slice:
+		return reflectListType(t)
+	case reflect.Struct:
+		return reflectStructType(t)
+	default:
+		return nodeOf("<invalid>")
+	}
+}

sprint.go

@@ -1,271 +0,0 @@
-package notation
-
-import (
-	"fmt"
-	"reflect"
-	"sort"
-	"strings"
-)
-
-func withType(o opts) (opts, bool, bool) {
-	if o&types == 0 && o&allTypes == 0 {
-		return o, false, false
-	}
-
-	if o&skipTypes != 0 && o&allTypes == 0 {
-		return o &^ skipTypes, false, false
-	}
-
-	return o, true, o&allTypes != 0
-}
-
-func sprintNil(o opts, r reflect.Value) string {
-	if _, _, a := withType(o); !a {
-		return "nil"
-	}
-
-	return fmt.Sprintf("%s(nil)", sprintType(r.Type()))
-}
-
-func sprintPrimitive(o opts, r reflect.Value, v interface{}, suppressType ...string) string {
-	s := fmt.Sprint(v)
-	if s[0] == '(' && s[len(s)-1] == ')' {
-		s = s[1 : len(s)-1]
-	}
-
-	_, w, a := withType(o)
-	if !w {
-		return s
-	}
-
-	t := sprintType(r.Type())
-	if !a {
-		for _, suppress := range suppressType {
-			if t == suppress {
-				return s
-			}
-		}
-	}
-
-	return fmt.Sprintf("%s(%s)", t, s)
-}
-
-func sprintItems(o opts, prefix string, r reflect.Value) string {
-	o, w, _ := withType(o)
-	itemOpts := o | skipTypes
-	s := make([]string, r.Len())
-	for i := 0; i < r.Len(); i++ {
-		s[i] = sprint(itemOpts, r.Index(i))
-	}
-
-	if !w {
-		return fmt.Sprintf("%s{%s}", prefix, strings.Join(s, ", "))
-	}
-
-	return fmt.Sprintf("%s{%s}", sprintType(r.Type()), strings.Join(s, ", "))
-}
-
-func sprintHidden(o opts, r reflect.Value, hidden string) string {
-	if r.IsNil() {
-		return sprintNil(o, r)
-	}
-
-	_, w, _ := withType(o)
-	if !w {
-		return hidden
-	}
-
-	return sprintType(r.Type())
-}
-
-func sprintArray(o opts, r reflect.Value) string {
-	return sprintItems(o, fmt.Sprintf("[%d]", r.Len()), r)
-}
-
-func sprintChan(o opts, r reflect.Value) string {
-	return sprintHidden(o, r, "chan")
-}
-
-func sprintFunc(o opts, r reflect.Value) string {
-	return sprintHidden(o, r, "func()")
-}
-
-func sprinterface(o opts, r reflect.Value) string {
-	if r.IsNil() {
-		return sprintNil(o, r)
-	}
-
-	o, w, _ := withType(o)
-	if !w {
-		return sprint(o, r.Elem())
-	}
-
-	return fmt.Sprintf("%s(%s)", sprintType(r.Type()), sprint(o, r.Elem()))
-}
-
-func sprintMap(o opts, r reflect.Value) string {
-	if r.IsNil() {
-		return sprintNil(o, r)
-	}
-
-	o, w, _ := withType(o)
-	itemOpts := o | skipTypes
-	var items []string
-	for _, key := range r.MapKeys() {
-		items = append(
-			items,
-			fmt.Sprintf(
-				"%s: %s",
-				sprint(itemOpts, key),
-				sprint(itemOpts, r.MapIndex(key)),
-			),
-		)
-	}
-
-	sort.Strings(items)
-	sitems := strings.Join(items, ", ")
-	if !w {
-		return fmt.Sprintf("map{%s}", sitems)
-	}
-
-	return fmt.Sprintf("%s{%s}", sprintType(r.Type()), sitems)
-}
-
-func sprintPointer(o opts, r reflect.Value) string {
-	if r.IsNil() {
-		return sprintNil(o, r)
-	}
-
-	s := sprint(o, r.Elem())
-	if _, w, _ := withType(o); !w {
-		return s
-	}
-
-	return fmt.Sprintf("*%s", s)
-}
-
-func sprintList(o opts, r reflect.Value) string {
-	if r.IsNil() {
-		return sprintNil(o, r)
-	}
-
-	return sprintItems(o, "[]", r)
-}
-
-func sprintString(o opts, r reflect.Value) string {
-	b := []byte(r.String())
-	e := make([]byte, 0, len(b))
-	for _, c := range b {
-		switch c {
-		case '\\':
-			e = append(e, '\\', '\\')
-		case '"':
-			e = append(e, '\\', '"')
-		case '\b':
-			e = append(e, '\\', 'b')
-		case '\f':
-			e = append(e, '\\', 'f')
-		case '\n':
-			e = append(e, '\\', 'n')
-		case '\r':
-			e = append(e, '\\', 'r')
-		case '\t':
-			e = append(e, '\\', 't')
-		case '\v':
-			e = append(e, '\\', 'v')
-		default:
-			e = append(e, c)
-		}
-	}
-
-	s := fmt.Sprintf("\"%s\"", string(e))
-	_, w, a := withType(o)
-	if !w {
-		return s
-	}
-
-	t := sprintType(r.Type())
-	if !a && t == "string" {
-		return s
-	}
-
-	return fmt.Sprintf("%s(%s)", t, s)
-}
-
-func sprintStruct(o opts, r reflect.Value) string {
-	o, w, _ := withType(o)
-	fieldOpts := o | skipTypes
-	rt := r.Type()
-	f := make([]string, r.NumField())
-	for i := 0; i < r.NumField(); i++ {
-		name := rt.Field(i).Name
-		f[i] = fmt.Sprintf(
-			"%s: %s",
-			name,
-			sprint(fieldOpts, r.FieldByName(name)),
-		)
-	}
-
-	fs := strings.Join(f, ", ")
-	if !w {
-		return fmt.Sprintf("{%s}", fs)
-	}
-
-	return fmt.Sprintf("%s{%s}", sprintType(rt), fs)
-}
-
-func sprintUnsafePointer(o opts, r reflect.Value) string {
-	if r.IsNil() {
-		return sprintNil(o, r)
-	}
-
-	return "pointer"
-}
-
-func sprint(o opts, r reflect.Value) string {
-	switch r.Kind() {
-	case reflect.Bool:
-		return sprintPrimitive(o, r, r.Bool(), "bool")
-	case
-		reflect.Int,
-		reflect.Int8,
-		reflect.Int16,
-		reflect.Int32,
-		reflect.Int64:
-		return sprintPrimitive(o, r, r.Int(), "int")
-	case
-		reflect.Uint,
-		reflect.Uint8,
-		reflect.Uint16,
-		reflect.Uint32,
-		reflect.Uint64,
-		reflect.Uintptr:
-		return sprintPrimitive(o, r, r.Uint())
-	case reflect.Float32, reflect.Float64:
-		return sprintPrimitive(o, r, r.Float())
-	case reflect.Complex64, reflect.Complex128:
-		return sprintPrimitive(o, r, r.Complex())
-	case reflect.Array:
-		return sprintArray(o, r)
-	case reflect.Chan:
-		return sprintChan(o, r)
-	case reflect.Func:
-		return sprintFunc(o, r)
-	case reflect.Interface:
-		return sprinterface(o, r)
-	case reflect.Map:
-		return sprintMap(o, r)
-	case reflect.Ptr:
-		return sprintPointer(o, r)
-	case reflect.Slice:
-		return sprintList(o, r)
-	case reflect.String:
-		return sprintString(o, r)
-	case reflect.Struct:
-		return sprintStruct(o, r)
-	case reflect.UnsafePointer:
-		return sprintUnsafePointer(o, r)
-	default:
-		return "<invalid>"
-	}
-}

sprint_test.go

@@ -1,7 +1,6 @@
 package notation
 
 import (
-	"reflect"
 	"testing"
 	"unsafe"
 )
@@ -243,8 +242,8 @@ func TestSprintv(t *testing.T) {
 		{"structure", struct{ foo int }{42}, "struct{foo int}{foo: int(42)}"},
 		{"custom structure", myStruct{42}, "myStruct{field: interface{}(int(42))}"},
 		{"custom structure, nil field", myStruct{}, "myStruct{field: interface{}(nil)}"},
-		{"unsafe pointer", unsafe.Pointer(&struct{}{}), "pointer"},
+		{"unsafe pointer", unsafe.Pointer(&struct{}{}), "Pointer(pointer)"},
-		{"custom unsafe pointer", myUnsafePointer(&struct{}{}), "pointer"},
+		{"custom unsafe pointer", myUnsafePointer(&struct{}{}), "myUnsafePointer(pointer)"},
 		{"unsafe pointer type", struct{ p unsafe.Pointer }{}, "struct{p Pointer}{p: Pointer(nil)}"},
 	} {
 		t.Run(test.title, func(t *testing.T) {
@@ -255,10 +254,3 @@ func TestSprintv(t *testing.T) {
 		})
 	}
 }
-
-func TestSprintInvalid(t *testing.T) {
-	s := sprint(none, reflect.Value{})
-	if s != "<invalid>" {
-		t.Fatalf("expected: <invalid>, got: %s", s)
-	}
-}

type.go

@@ -1,118 +0,0 @@
-package notation
-
-import (
-	"fmt"
-	"reflect"
-	"strings"
-)
-
-func funcBase(t reflect.Type) string {
-	args := func(num func() int, typ func(int) reflect.Type) []string {
-		t := make([]string, num())
-		for i := 0; i < num(); i++ {
-			t[i] = sprintType(typ(i))
-		}
-
-		return t
-	}
-
-	in := args(t.NumIn, t.In)
-	out := args(t.NumOut, t.Out)
-
-	var outs string
-	if len(out) == 1 {
-		outs = out[0]
-	} else if len(out) > 1 {
-		outs = fmt.Sprintf("(%s)", strings.Join(out, ", "))
-	}
-
-	var s string
-	if outs == "" {
-		s = fmt.Sprintf("(%s)", strings.Join(in, ", "))
-	} else {
-		s = fmt.Sprintf("(%s) %s", strings.Join(in, ", "), outs)
-	}
-
-	return s
-}
-
-func arrayType(t reflect.Type) string {
-	return fmt.Sprintf("[%d]%s", t.Len(), sprintType(t.Elem()))
-}
-
-func chanType(t reflect.Type) string {
-	var prefix string
-	switch t.ChanDir() {
-	case reflect.RecvDir:
-		prefix = "<-chan"
-	case reflect.SendDir:
-		prefix = "chan<-"
-	default:
-		prefix = "chan"
-	}
-
-	return fmt.Sprintf("%s %s", prefix, sprintType(t.Elem()))
-}
-
-func funcType(t reflect.Type) string {
-	return fmt.Sprintf("func%s", funcBase(t))
-}
-
-func interfaceType(t reflect.Type) string {
-	var m []string
-	for i := 0; i < t.NumMethod(); i++ {
-		method := t.Method(i)
-		m = append(m, fmt.Sprintf("%s%s", method.Name, funcBase(method.Type)))
-	}
-
-	return fmt.Sprintf("interface{%s}", strings.Join(m, "; "))
-}
-
-func mapType(t reflect.Type) string {
-	return fmt.Sprintf("map[%s]%s", sprintType(t.Key()), sprintType(t.Elem()))
-}
-
-func pointerType(t reflect.Type) string {
-	return fmt.Sprintf("*%s", sprintType(t.Elem()))
-}
-
-func listType(t reflect.Type) string {
-	return fmt.Sprintf("[]%s", sprintType(t.Elem()))
-}
-
-func structType(t reflect.Type) string {
-	f := make([]string, t.NumField())
-	for i := 0; i < t.NumField(); i++ {
-		fi := t.Field(i)
-		f[i] = fmt.Sprintf("%s %s", fi.Name, sprintType(fi.Type))
-	}
-
-	return fmt.Sprintf("struct{%s}", strings.Join(f, "; "))
-}
-
-func sprintType(t reflect.Type) string {
-	if t.Name() != "" {
-		return t.Name()
-	}
-
-	switch t.Kind() {
-	case reflect.Array:
-		return arrayType(t)
-	case reflect.Chan:
-		return chanType(t)
-	case reflect.Func:
-		return funcType(t)
-	case reflect.Interface:
-		return interfaceType(t)
-	case reflect.Map:
-		return mapType(t)
-	case reflect.Ptr:
-		return pointerType(t)
-	case reflect.Slice:
-		return listType(t)
-	case reflect.Struct:
-		return structType(t)
-	default:
-		return "<invalid>"
-	}
-}