diff --git a/compiler.go b/compiler.go
index fa9ab91..c0d087b 100644
--- a/compiler.go
+++ b/compiler.go
@@ -14,7 +14,7 @@ func optimize(matcher match.Matcher) match.Matcher {
 
 	case match.Any:
 		if len(m.Separators) == 0 {
-			return match.Super{}
+			return match.NewSuper()
 		}
 
 	case match.AnyOf:
@@ -54,23 +54,23 @@ func optimize(matcher match.Matcher) match.Matcher {
 		rs, rightSuffix := m.Right.(match.Suffix)
 
 		if leftSuper && rightSuper {
-			return match.Contains{r.Str, false}
+			return match.NewContains(r.Str, false)
 		}
 
 		if leftSuper && rightNil {
-			return match.Suffix{r.Str}
+			return match.NewSuffix(r.Str)
 		}
 
 		if rightSuper && leftNil {
-			return match.Prefix{r.Str}
+			return match.NewPrefix(r.Str)
 		}
 
 		if leftNil && rightSuffix {
-			return match.PrefixSuffix{Prefix: r.Str, Suffix: rs.Suffix}
+			return match.NewPrefixSuffix(r.Str, rs.Suffix)
 		}
 
 		if rightNil && leftPrefix {
-			return match.PrefixSuffix{Prefix: lp.Prefix, Suffix: r.Str}
+			return match.NewPrefixSuffix(lp.Prefix, r.Str)
 		}
 
 		return m
@@ -124,7 +124,7 @@ func glueAsRow(matchers []match.Matcher) match.Matcher {
 		}
 	}
 
-	return match.NewRow(c, l)
+	return match.NewRow(l, c...)
 }
 
 func glueAsEvery(matchers []match.Matcher) match.Matcher {
@@ -182,29 +182,29 @@ func glueAsEvery(matchers []match.Matcher) match.Matcher {
 	}
 
 	if hasSuper && !hasAny && !hasSingle {
-		return match.Super{}
+		return match.NewSuper()
 	}
 
 	if hasAny && !hasSuper && !hasSingle {
-		return match.Any{separator}
+		return match.NewAny(separator)
 	}
 
 	if (hasAny || hasSuper) && min > 0 && len(separator) == 0 {
-		return match.Min{min}
+		return match.NewMin(min)
 	}
 
-	every := match.EveryOf{}
+	every := match.NewEveryOf()
 
 	if min > 0 {
-		every.Add(match.Min{min})
+		every.Add(match.NewMin(min))
 
 		if !hasAny && !hasSuper {
-			every.Add(match.Max{min})
+			every.Add(match.NewMax(min))
 		}
 	}
 
 	if len(separator) > 0 {
-		every.Add(match.Contains{string(separator), true})
+		every.Add(match.NewContains(string(separator), true))
 	}
 
 	return every
@@ -474,7 +474,7 @@ func doAnyOf(n *nodeAnyOf, s []rune) (match.Matcher, error) {
 	var matchers []match.Matcher
 	for _, desc := range n.children() {
 		if desc == nil {
-			matchers = append(matchers, match.Nothing{})
+			matchers = append(matchers, match.NewNothing())
 			continue
 		}
 
@@ -485,7 +485,7 @@ func doAnyOf(n *nodeAnyOf, s []rune) (match.Matcher, error) {
 		matchers = append(matchers, optimize(m))
 	}
 
-	return match.AnyOf{matchers}, nil
+	return match.NewAnyOf(matchers...), nil
 }
 
 func do(leaf node, s []rune) (m match.Matcher, err error) {
@@ -500,7 +500,7 @@ func do(leaf node, s []rune) (m match.Matcher, err error) {
 		var matchers []match.Matcher
 		for _, desc := range n.children() {
 			if desc == nil {
-				matchers = append(matchers, match.Nothing{})
+				matchers = append(matchers, match.NewNothing())
 				continue
 			}
 
@@ -511,12 +511,12 @@ func do(leaf node, s []rune) (m match.Matcher, err error) {
 			matchers = append(matchers, optimize(m))
 		}
 
-		return match.AnyOf{matchers}, nil
+		return match.NewAnyOf(matchers...), nil
 
 	case *nodePattern:
 		nodes := leaf.children()
 		if len(nodes) == 0 {
-			return match.Nothing{}, nil
+			return match.NewNothing(), nil
 		}
 
 		var matchers []match.Matcher
@@ -534,19 +534,19 @@ func do(leaf node, s []rune) (m match.Matcher, err error) {
 		}
 
 	case *nodeList:
-		m = match.List{[]rune(n.chars), n.not}
+		m = match.NewList([]rune(n.chars), n.not)
 
 	case *nodeRange:
-		m = match.Range{n.lo, n.hi, n.not}
+		m = match.NewRange(n.lo, n.hi, n.not)
 
 	case *nodeAny:
-		m = match.Any{s}
+		m = match.NewAny(s)
 
 	case *nodeSuper:
-		m = match.Super{}
+		m = match.NewSuper()
 
 	case *nodeSingle:
-		m = match.Single{s}
+		m = match.NewSingle(s)
 
 	case *nodeText:
 		m = match.NewText(n.text)
@@ -633,19 +633,19 @@ func do2(node node, s []rune) ([]match.Matcher, error) {
 		}
 
 	case *nodeList:
-		result = append(result, match.List{[]rune(n.chars), n.not})
+		result = append(result, match.NewList([]rune(n.chars), n.not))
 
 	case *nodeRange:
-		result = append(result, match.Range{n.lo, n.hi, n.not})
+		result = append(result, match.NewRange(n.lo, n.hi, n.not))
 
 	case *nodeAny:
-		result = append(result, match.Any{s})
+		result = append(result, match.NewAny(s))
 
 	case *nodeSuper:
-		result = append(result, match.Super{})
+		result = append(result, match.NewSuper())
 
 	case *nodeSingle:
-		result = append(result, match.Single{s})
+		result = append(result, match.NewSingle(s))
 
 	case *nodeText:
 		result = append(result, match.NewText(n.text))
@@ -669,7 +669,7 @@ func compile(ast *nodePattern, s []rune) (Glob, error) {
 	//	if len(ms) == 1 {
 	//		return ms[0], nil
 	//	} else {
-	//		return match.AnyOf{ms}, nil
+	//		return match.NewAnyOf(ms), nil
 	//	}
 
 	g, err := do(ast, s)
diff --git a/compiler_test.go b/compiler_test.go
index 0be7b76..f2d0c70 100644
--- a/compiler_test.go
+++ b/compiler_test.go
@@ -15,40 +15,40 @@ func TestGlueMatchers(t *testing.T) {
 	}{
 		{
 			[]match.Matcher{
-				match.Super{},
-				match.Single{},
+				match.NewSuper(),
+				match.NewSingle(nil),
 			},
-			match.Min{1},
+			match.NewMin(1),
 		},
 		{
 			[]match.Matcher{
-				match.Any{separators},
-				match.Single{separators},
+				match.NewAny(separators),
+				match.NewSingle(separators),
 			},
 			match.EveryOf{match.Matchers{
-				match.Min{1},
-				match.Contains{string(separators), true},
+				match.NewMin(1),
+				match.NewContains(string(separators), true),
 			}},
 		},
 		{
 			[]match.Matcher{
-				match.Single{},
-				match.Single{},
-				match.Single{},
+				match.NewSingle(nil),
+				match.NewSingle(nil),
+				match.NewSingle(nil),
 			},
 			match.EveryOf{match.Matchers{
-				match.Min{3},
-				match.Max{3},
+				match.NewMin(3),
+				match.NewMax(3),
 			}},
 		},
 		{
 			[]match.Matcher{
-				match.List{[]rune{'a'}, true},
-				match.Any{[]rune{'a'}},
+				match.NewList([]rune{'a'}, true),
+				match.NewAny([]rune{'a'}),
 			},
 			match.EveryOf{match.Matchers{
-				match.Min{1},
-				match.Contains{"a", true},
+				match.NewMin(1),
+				match.NewContains("a", true),
 			}},
 		},
 	} {
@@ -59,7 +59,7 @@ func TestGlueMatchers(t *testing.T) {
 		}
 
 		if !reflect.DeepEqual(act, test.exp) {
-			t.Errorf("#%d unexpected convert matchers result:\nact: %s;\nexp: %s", id, act, test.exp)
+			t.Errorf("#%d unexpected convert matchers result:\nact: %#v;\nexp: %#v", id, act, test.exp)
 			continue
 		}
 	}
@@ -72,15 +72,15 @@ func TestCompileMatchers(t *testing.T) {
 	}{
 		{
 			[]match.Matcher{
-				match.Super{},
-				match.Single{separators},
+				match.NewSuper(),
+				match.NewSingle(separators),
 				match.NewText("c"),
 			},
 			match.NewBTree(
 				match.NewText("c"),
 				match.NewBTree(
-					match.Single{separators},
-					match.Super{},
+					match.NewSingle(separators),
+					match.NewSuper(),
 					nil,
 				),
 				nil,
@@ -88,32 +88,32 @@ func TestCompileMatchers(t *testing.T) {
 		},
 		{
 			[]match.Matcher{
-				match.Any{},
+				match.NewAny(nil),
 				match.NewText("c"),
-				match.Any{},
+				match.NewAny(nil),
 			},
 			match.NewBTree(
 				match.NewText("c"),
-				match.Any{},
-				match.Any{},
+				match.NewAny(nil),
+				match.NewAny(nil),
 			),
 		},
 		{
 			[]match.Matcher{
-				match.Range{'a', 'c', true},
-				match.List{[]rune{'z', 't', 'e'}, false},
+				match.NewRange('a', 'c', true),
+				match.NewList([]rune{'z', 't', 'e'}, false),
 				match.NewText("c"),
-				match.Single{},
+				match.NewSingle(nil),
 			},
-			match.Row{
-				Matchers: match.Matchers{
-					match.Range{'a', 'c', true},
-					match.List{[]rune{'z', 't', 'e'}, false},
+			match.NewRow(
+				4,
+				match.Matchers{
+					match.NewRange('a', 'c', true),
+					match.NewList([]rune{'z', 't', 'e'}, false),
 					match.NewText("c"),
-					match.Single{},
-				},
-				RunesLength: 4,
-			},
+					match.NewSingle(nil),
+				}...,
+			),
 		},
 	} {
 		act, err := compileMatchers(test.in)
@@ -123,7 +123,7 @@ func TestCompileMatchers(t *testing.T) {
 		}
 
 		if !reflect.DeepEqual(act, test.exp) {
-			t.Errorf("#%d unexpected convert matchers result:\nact: %s;\nexp: %s", id, act, test.exp)
+			t.Errorf("#%d unexpected convert matchers result:\nact: %#v\nexp: %#v", id, act, test.exp)
 			continue
 		}
 	}
@@ -135,52 +135,52 @@ func TestConvertMatchers(t *testing.T) {
 	}{
 		{
 			[]match.Matcher{
-				match.Range{'a', 'c', true},
-				match.List{[]rune{'z', 't', 'e'}, false},
+				match.NewRange('a', 'c', true),
+				match.NewList([]rune{'z', 't', 'e'}, false),
 				match.NewText("c"),
-				match.Single{},
-				match.Any{},
+				match.NewSingle(nil),
+				match.NewAny(nil),
 			},
 			[]match.Matcher{
-				match.Row{
-					Matchers: match.Matchers{
-						match.Range{'a', 'c', true},
-						match.List{[]rune{'z', 't', 'e'}, false},
+				match.NewRow(
+					4,
+					[]match.Matcher{
+						match.NewRange('a', 'c', true),
+						match.NewList([]rune{'z', 't', 'e'}, false),
 						match.NewText("c"),
-						match.Single{},
-					},
-					RunesLength: 4,
-				},
-				match.Any{},
+						match.NewSingle(nil),
+					}...,
+				),
+				match.NewAny(nil),
 			},
 		},
 		{
 			[]match.Matcher{
-				match.Range{'a', 'c', true},
-				match.List{[]rune{'z', 't', 'e'}, false},
+				match.NewRange('a', 'c', true),
+				match.NewList([]rune{'z', 't', 'e'}, false),
 				match.NewText("c"),
-				match.Single{},
-				match.Any{},
-				match.Single{},
-				match.Single{},
-				match.Any{},
+				match.NewSingle(nil),
+				match.NewAny(nil),
+				match.NewSingle(nil),
+				match.NewSingle(nil),
+				match.NewAny(nil),
 			},
 			[]match.Matcher{
-				match.Row{
-					Matchers: match.Matchers{
-						match.Range{'a', 'c', true},
-						match.List{[]rune{'z', 't', 'e'}, false},
+				match.NewRow(
+					3,
+					match.Matchers{
+						match.NewRange('a', 'c', true),
+						match.NewList([]rune{'z', 't', 'e'}, false),
 						match.NewText("c"),
-					},
-					RunesLength: 3,
-				},
-				match.Min{3},
+					}...,
+				),
+				match.NewMin(3),
 			},
 		},
 	} {
 		act := minimizeMatchers(test.in)
 		if !reflect.DeepEqual(act, test.exp) {
-			t.Errorf("#%d unexpected convert matchers 2 result:\nact: %s;\nexp: %s", id, act, test.exp)
+			t.Errorf("#%d unexpected convert matchers 2 result:\nact: %#v\nexp: %#v", id, act, test.exp)
 			continue
 		}
 	}
@@ -213,20 +213,20 @@ func TestCompiler(t *testing.T) {
 		{
 			ast:    pattern(&nodeAny{}),
 			sep:    separators,
-			result: match.Any{separators},
+			result: match.NewAny(separators),
 		},
 		{
 			ast:    pattern(&nodeAny{}),
-			result: match.Super{},
+			result: match.NewSuper(),
 		},
 		{
 			ast:    pattern(&nodeSuper{}),
-			result: match.Super{},
+			result: match.NewSuper(),
 		},
 		{
 			ast:    pattern(&nodeSingle{}),
 			sep:    separators,
-			result: match.Single{separators},
+			result: match.NewSingle(separators),
 		},
 		{
 			ast: pattern(&nodeRange{
@@ -234,39 +234,39 @@ func TestCompiler(t *testing.T) {
 				hi:  'z',
 				not: true,
 			}),
-			result: match.Range{'a', 'z', true},
+			result: match.NewRange('a', 'z', true),
 		},
 		{
 			ast: pattern(&nodeList{
 				chars: "abc",
 				not:   true,
 			}),
-			result: match.List{[]rune{'a', 'b', 'c'}, true},
+			result: match.NewList([]rune{'a', 'b', 'c'}, true),
 		},
 		{
 			ast: pattern(&nodeAny{}, &nodeSingle{}, &nodeSingle{}, &nodeSingle{}),
 			sep: separators,
 			result: match.EveryOf{Matchers: match.Matchers{
-				match.Min{3},
-				match.Contains{string(separators), true},
+				match.NewMin(3),
+				match.NewContains(string(separators), true),
 			}},
 		},
 		{
 			ast:    pattern(&nodeAny{}, &nodeSingle{}, &nodeSingle{}, &nodeSingle{}),
-			result: match.Min{3},
+			result: match.NewMin(3),
 		},
 		{
 			ast: pattern(&nodeAny{}, &nodeText{text: "abc"}, &nodeSingle{}),
 			sep: separators,
 			result: match.NewBTree(
-				match.Row{
-					Matchers: match.Matchers{
+				match.NewRow(
+					4,
+					match.Matchers{
 						match.NewText("abc"),
-						match.Single{separators},
-					},
-					RunesLength: 4,
-				},
-				match.Any{separators},
+						match.NewSingle(separators),
+					}...,
+				),
+				match.NewAny(separators),
 				nil,
 			),
 		},
@@ -274,49 +274,49 @@ func TestCompiler(t *testing.T) {
 			ast: pattern(&nodeSuper{}, &nodeSingle{}, &nodeText{text: "abc"}, &nodeSingle{}),
 			sep: separators,
 			result: match.NewBTree(
-				match.Row{
-					Matchers: match.Matchers{
-						match.Single{separators},
+				match.NewRow(
+					5,
+					match.Matchers{
+						match.NewSingle(separators),
 						match.NewText("abc"),
-						match.Single{separators},
-					},
-					RunesLength: 5,
-				},
-				match.Super{},
+						match.NewSingle(separators),
+					}...,
+				),
+				match.NewSuper(),
 				nil,
 			),
 		},
 		{
 			ast:    pattern(&nodeAny{}, &nodeText{text: "abc"}),
-			result: match.Suffix{"abc"},
+			result: match.NewSuffix("abc"),
 		},
 		{
 			ast:    pattern(&nodeText{text: "abc"}, &nodeAny{}),
-			result: match.Prefix{"abc"},
+			result: match.NewPrefix("abc"),
 		},
 		{
 			ast:    pattern(&nodeText{text: "abc"}, &nodeAny{}, &nodeText{text: "def"}),
-			result: match.PrefixSuffix{"abc", "def"},
+			result: match.NewPrefixSuffix("abc", "def"),
 		},
 		{
 			ast:    pattern(&nodeAny{}, &nodeAny{}, &nodeAny{}, &nodeText{text: "abc"}, &nodeAny{}, &nodeAny{}),
-			result: match.Contains{"abc", false},
+			result: match.NewContains("abc", false),
 		},
 		{
 			ast: pattern(&nodeAny{}, &nodeAny{}, &nodeAny{}, &nodeText{text: "abc"}, &nodeAny{}, &nodeAny{}),
 			sep: separators,
 			result: match.NewBTree(
 				match.NewText("abc"),
-				match.Any{separators},
-				match.Any{separators},
+				match.NewAny(separators),
+				match.NewAny(separators),
 			),
 		},
 		{
 			ast: pattern(&nodeSuper{}, &nodeSingle{}, &nodeText{text: "abc"}, &nodeSuper{}, &nodeSingle{}),
 			result: match.NewBTree(
 				match.NewText("abc"),
-				match.Min{1},
-				match.Min{1},
+				match.NewMin(1),
+				match.NewMin(1),
 			),
 		},
 		{
@@ -348,9 +348,9 @@ func TestCompiler(t *testing.T) {
 				match.NewText("abc"),
 				nil,
 				match.AnyOf{Matchers: match.Matchers{
-					match.Single{},
-					match.List{List: []rune{'d', 'e', 'f'}},
-					match.Nothing{},
+					match.NewSingle(nil),
+					match.NewList([]rune{'d', 'e', 'f'}, false),
+					match.NewNothing(),
 				}},
 			),
 		},
@@ -361,15 +361,15 @@ func TestCompiler(t *testing.T) {
 				&nodeAny{},
 			),
 			result: match.NewBTree(
-				match.Row{
-					Matchers: match.Matchers{
-						match.Range{Lo: 'a', Hi: 'z'},
-						match.Range{Lo: 'a', Hi: 'x', Not: true},
-					},
-					RunesLength: 2,
-				},
+				match.NewRow(
+					2,
+					match.Matchers{
+						match.NewRange('a', 'z', false),
+						match.NewRange('a', 'x', true),
+					}...,
+				),
 				nil,
-				match.Super{},
+				match.NewSuper(),
 			),
 		},
 		{
@@ -385,17 +385,17 @@ func TestCompiler(t *testing.T) {
 					&nodeText{text: "ghi"},
 				),
 			)),
-			result: match.Row{
-				RunesLength: 7,
-				Matchers: match.Matchers{
+			result: match.NewRow(
+				7,
+				match.Matchers{
 					match.NewText("abc"),
 					match.AnyOf{Matchers: match.Matchers{
-						match.List{List: []rune{'a', 'b', 'c'}},
-						match.List{List: []rune{'d', 'e', 'f'}},
+						match.NewList([]rune{'a', 'b', 'c'}, false),
+						match.NewList([]rune{'d', 'e', 'f'}, false),
 					}},
 					match.NewText("ghi"),
-				},
-			},
+				}...,
+			),
 		},
 		//				{
 		//			ast: pattern(
@@ -403,21 +403,21 @@ func TestCompiler(t *testing.T) {
 		//				anyOf(&nodeText{text: "c"}, &nodeText{text: "d"}),
 		//			),
 		//			result: match.AnyOf{Matchers: match.Matchers{
-		//				match.Row{Matchers: match.Matchers{match.Raw{"a"}, match.Raw{"c", 1}}},
-		//				match.Row{Matchers: match.Matchers{match.Raw{"a"}, match.Raw{"d"}}},
-		//				match.Row{Matchers: match.Matchers{match.Raw{"b"}, match.Raw{"c", 1}}},
-		//				match.Row{Matchers: match.Matchers{match.Raw{"b"}, match.Raw{"d"}}},
+		//				match.NewRow(Matchers: match.Matchers{match.Raw{"a"}, match.Raw{"c", 1}}),
+		//				match.NewRow(Matchers: match.Matchers{match.Raw{"a"}, match.Raw{"d"}}),
+		//				match.NewRow(Matchers: match.Matchers{match.Raw{"b"}, match.Raw{"c", 1}}),
+		//				match.NewRow(Matchers: match.Matchers{match.Raw{"b"}, match.Raw{"d"}}),
 		//			}},
 		//		},
 	} {
-		prog, err := compile(test.ast, test.sep)
+		m, err := compile(test.ast, test.sep)
 		if err != nil {
 			t.Errorf("compilation error: %s", err)
 			continue
 		}
 
-		if !reflect.DeepEqual(prog, test.result) {
-			t.Errorf("#%d results are not equal:\nexp: %s,\nact: %s", id, test.result, prog)
+		if !reflect.DeepEqual(m, test.result) {
+			t.Errorf("#%d results are not equal:\nexp: %#v\nact: %#v", id, test.result, m)
 			continue
 		}
 	}
@@ -426,105 +426,105 @@ func TestCompiler(t *testing.T) {
 const complexityString = "abcd"
 
 //func BenchmarkComplexityAny(b *testing.B) {
-//	m := match.Any{}
+//	m := match.NewAny(nil)
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityContains(b *testing.B) {
-//	m := match.Contains{}
+//	m := match.NewContains()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityList(b *testing.B) {
-//	m := match.List{}
+//	m := match.NewList()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityMax(b *testing.B) {
-//	m := match.Max{}
+//	m := match.NewMax()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityMin(b *testing.B) {
-//	m := match.Min{}
+//	m := match.NewMin()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityNothing(b *testing.B) {
-//	m := match.Nothing{}
+//	m := match.NewNothing()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityPrefix(b *testing.B) {
-//	m := match.Prefix{}
+//	m := match.NewPrefix()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityPrefixSuffix(b *testing.B) {
-//	m := match.PrefixSuffix{}
+//	m := match.NewPrefixSuffix()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityRange(b *testing.B) {
-//	m := match.Range{}
+//	m := match.NewRange()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityRow(b *testing.B) {
-//	m := match.Row{}
+//	m := match.NewRow()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexitySingle(b *testing.B) {
-//	m := match.Single{}
+//	m := match.NewSingle(nil)
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexitySuffix(b *testing.B) {
-//	m := match.Suffix{}
+//	m := match.NewSuffix()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexitySuper(b *testing.B) {
-//	m := match.Super{}
+//	m := match.NewSuper()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityText(b *testing.B) {
-//	m := match.Text{}
+//	m := match.NewText()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
 //	}
 //}
 //func BenchmarkComplexityAnyOf(b *testing.B) {
-//	m := match.AnyOf{}
+//	m := match.NewAnyOf()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
@@ -538,7 +538,7 @@ const complexityString = "abcd"
 //	}
 //}
 //func BenchmarkComplexityEveryOf(b *testing.B) {
-//	m := match.EveryOf{}
+//	m := match.NewEveryOf()
 //	for i := 0; i < b.N; i++ {
 //		_ = m.Match(complexityString)
 //		_, _ = m.Index(complexityString)
diff --git a/match/any.go b/match/any.go
index e7a2953..1d2d12b 100644
--- a/match/any.go
+++ b/match/any.go
@@ -9,6 +9,10 @@ type Any struct {
 	Separators []rune
 }
 
+func NewAny(s []rune) Any {
+	return Any{s}
+}
+
 func (self Any) Match(s string) bool {
 	return strings.IndexAnyRunes(s, self.Separators) == -1
 }
diff --git a/match/any_of.go b/match/any_of.go
index 8cdfed1..ffae2f6 100644
--- a/match/any_of.go
+++ b/match/any_of.go
@@ -8,6 +8,10 @@ type AnyOf struct {
 	Matchers Matchers
 }
 
+func NewAnyOf(m ...Matcher) AnyOf {
+	return AnyOf{Matchers(m)}
+}
+
 func (self *AnyOf) Add(m Matcher) error {
 	self.Matchers = append(self.Matchers, m)
 	return nil
@@ -27,7 +31,6 @@ func (self AnyOf) Index(s string) (int, []int) {
 	index := -1
 
 	segments := acquireSegments(len(s))
-
 	for _, m := range self.Matchers {
 		idx, seg := m.Index(s)
 		if idx == -1 {
diff --git a/match/any_of_test.go b/match/any_of_test.go
index 44782e9..3b478cf 100644
--- a/match/any_of_test.go
+++ b/match/any_of_test.go
@@ -14,7 +14,7 @@ func TestAnyOfIndex(t *testing.T) {
 	}{
 		{
 			Matchers{
-				Any{},
+				NewAny(nil),
 				NewText("b"),
 				NewText("c"),
 			},
@@ -24,8 +24,8 @@ func TestAnyOfIndex(t *testing.T) {
 		},
 		{
 			Matchers{
-				Prefix{"b"},
-				Suffix{"c"},
+				NewPrefix("b"),
+				NewSuffix("c"),
 			},
 			"abc",
 			0,
@@ -41,7 +41,7 @@ func TestAnyOfIndex(t *testing.T) {
 			[]int{1},
 		},
 	} {
-		everyOf := AnyOf{test.matchers}
+		everyOf := NewAnyOf(test.matchers...)
 		index, segments := everyOf.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
diff --git a/match/any_test.go b/match/any_test.go
index e15a0c7..358f553 100644
--- a/match/any_test.go
+++ b/match/any_test.go
@@ -25,7 +25,7 @@ func TestAnyIndex(t *testing.T) {
 			[]int{0, 1, 2, 3},
 		},
 	} {
-		p := Any{test.sep}
+		p := NewAny(test.sep)
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -37,7 +37,7 @@ func TestAnyIndex(t *testing.T) {
 }
 
 func BenchmarkIndexAny(b *testing.B) {
-	m := Any{bench_separators}
+	m := NewAny(bench_separators)
 
 	for i := 0; i < b.N; i++ {
 		_, s := m.Index(bench_pattern)
@@ -46,7 +46,7 @@ func BenchmarkIndexAny(b *testing.B) {
 }
 
 func BenchmarkIndexAnyParallel(b *testing.B) {
-	m := Any{bench_separators}
+	m := NewAny(bench_separators)
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
diff --git a/match/btree.go b/match/btree.go
index 8827035..a8130e9 100644
--- a/match/btree.go
+++ b/match/btree.go
@@ -129,5 +129,18 @@ func (self BTree) Match(s string) bool {
 }
 
 func (self BTree) String() string {
-	return fmt.Sprintf("<btree:[%s<-%s->%s]>", self.Left, self.Value, self.Right)
+	const n string = "<nil>"
+	var l, r string
+	if self.Left == nil {
+		l = n
+	} else {
+		l = self.Left.String()
+	}
+	if self.Right == nil {
+		r = n
+	} else {
+		r = self.Right.String()
+	}
+
+	return fmt.Sprintf("<btree:[%s<-%s->%s]>", l, self.Value, r)
 }
diff --git a/match/btree_test.go b/match/btree_test.go
index 3a96786..3bd9ea5 100644
--- a/match/btree_test.go
+++ b/match/btree_test.go
@@ -11,17 +11,17 @@ func TestBTree(t *testing.T) {
 		exp  bool
 	}{
 		{
-			NewBTree(NewText("abc"), Super{}, Super{}),
+			NewBTree(NewText("abc"), NewSuper(), NewSuper()),
 			"abc",
 			true,
 		},
 		{
-			NewBTree(NewText("a"), Single{}, Single{}),
+			NewBTree(NewText("a"), NewSingle(nil), NewSingle(nil)),
 			"aaa",
 			true,
 		},
 		{
-			NewBTree(NewText("b"), Single{}, nil),
+			NewBTree(NewText("b"), NewSingle(nil), nil),
 			"bbb",
 			false,
 		},
@@ -29,8 +29,8 @@ func TestBTree(t *testing.T) {
 			NewBTree(
 				NewText("c"),
 				NewBTree(
-					Single{},
-					Super{},
+					NewSingle(nil),
+					NewSuper(),
 					nil,
 				),
 				nil,
diff --git a/match/contains.go b/match/contains.go
index be20492..b4f57fc 100644
--- a/match/contains.go
+++ b/match/contains.go
@@ -10,6 +10,10 @@ type Contains struct {
 	Not    bool
 }
 
+func NewContains(needle string, not bool) Contains {
+	return Contains{needle, not}
+}
+
 func (self Contains) Match(s string) bool {
 	return strings.Contains(s, self.Needle) != self.Not
 }
diff --git a/match/contains_test.go b/match/contains_test.go
index f840793..931322e 100644
--- a/match/contains_test.go
+++ b/match/contains_test.go
@@ -42,7 +42,7 @@ func TestContainsIndex(t *testing.T) {
 			[]int{0, 1, 2, 3},
 		},
 	} {
-		p := Contains{test.prefix, test.not}
+		p := NewContains(test.prefix, test.not)
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -54,7 +54,7 @@ func TestContainsIndex(t *testing.T) {
 }
 
 func BenchmarkIndexContains(b *testing.B) {
-	m := Contains{string(bench_separators), true}
+	m := NewContains(string(bench_separators), true)
 
 	for i := 0; i < b.N; i++ {
 		_, s := m.Index(bench_pattern)
@@ -63,7 +63,7 @@ func BenchmarkIndexContains(b *testing.B) {
 }
 
 func BenchmarkIndexContainsParallel(b *testing.B) {
-	m := Contains{string(bench_separators), true}
+	m := NewContains(string(bench_separators), true)
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
diff --git a/match/every_of.go b/match/every_of.go
index 9220f78..7c968ee 100644
--- a/match/every_of.go
+++ b/match/every_of.go
@@ -8,6 +8,10 @@ type EveryOf struct {
 	Matchers Matchers
 }
 
+func NewEveryOf(m ...Matcher) EveryOf {
+	return EveryOf{Matchers(m)}
+}
+
 func (self *EveryOf) Add(m Matcher) error {
 	self.Matchers = append(self.Matchers, m)
 	return nil
@@ -31,7 +35,6 @@ func (self EveryOf) Index(s string) (int, []int) {
 
 	// make `in` with cap as len(s),
 	// cause it is the maximum size of output segments values
-	//todo opti!!!
 	next := acquireSegments(len(s))
 	current := acquireSegments(len(s))
 
@@ -39,6 +42,8 @@ func (self EveryOf) Index(s string) (int, []int) {
 	for i, m := range self.Matchers {
 		idx, seg := m.Index(sub)
 		if idx == -1 {
+			releaseSegments(next)
+			releaseSegments(current)
 			return -1, nil
 		}
 
@@ -61,6 +66,8 @@ func (self EveryOf) Index(s string) (int, []int) {
 			}
 
 			if len(next) == 0 {
+				releaseSegments(next)
+				releaseSegments(current)
 				return -1, nil
 			}
 
@@ -72,6 +79,8 @@ func (self EveryOf) Index(s string) (int, []int) {
 		offset += idx
 	}
 
+	releaseSegments(next)
+
 	return index, current
 }
 
diff --git a/match/every_of_test.go b/match/every_of_test.go
index 3f70a78..eb83f86 100644
--- a/match/every_of_test.go
+++ b/match/every_of_test.go
@@ -14,7 +14,7 @@ func TestEveryOfIndex(t *testing.T) {
 	}{
 		{
 			Matchers{
-				Any{},
+				NewAny(nil),
 				NewText("b"),
 				NewText("c"),
 			},
@@ -24,16 +24,16 @@ func TestEveryOfIndex(t *testing.T) {
 		},
 		{
 			Matchers{
-				Any{},
-				Prefix{"b"},
-				Suffix{"c"},
+				NewAny(nil),
+				NewPrefix("b"),
+				NewSuffix("c"),
 			},
 			"abc",
 			1,
 			[]int{2},
 		},
 	} {
-		everyOf := EveryOf{test.matchers}
+		everyOf := NewEveryOf(test.matchers...)
 		index, segments := everyOf.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
diff --git a/match/list.go b/match/list.go
index 00f2d98..fe0841f 100644
--- a/match/list.go
+++ b/match/list.go
@@ -12,10 +12,7 @@ type List struct {
 }
 
 func NewList(list []rune, not bool) List {
-	return List{
-		List: list,
-		Not:  not,
-	}
+	return List{list, not}
 }
 
 func (self List) Match(s string) bool {
@@ -48,5 +45,5 @@ func (self List) String() string {
 		not = "!"
 	}
 
-	return fmt.Sprintf("<list:%s[%s]>", not, self.List)
+	return fmt.Sprintf("<list:%s[%s]>", not, string(self.List))
 }
diff --git a/match/max.go b/match/max.go
index 5405594..d72f69e 100644
--- a/match/max.go
+++ b/match/max.go
@@ -9,6 +9,10 @@ type Max struct {
 	Limit int
 }
 
+func NewMax(l int) Max {
+	return Max{l}
+}
+
 func (self Max) Match(s string) bool {
 	var l int
 	for range s {
@@ -22,8 +26,7 @@ func (self Max) Match(s string) bool {
 }
 
 func (self Max) Index(s string) (int, []int) {
-	segments := make([]int, 0, self.Limit+1)
-
+	segments := acquireSegments(self.Limit + 1)
 	segments = append(segments, 0)
 	var count int
 	for i, r := range s {
diff --git a/match/max_test.go b/match/max_test.go
index 005e3f0..2367628 100644
--- a/match/max_test.go
+++ b/match/max_test.go
@@ -25,7 +25,7 @@ func TestMaxIndex(t *testing.T) {
 			[]int{0, 1, 2, 3},
 		},
 	} {
-		p := Max{test.limit}
+		p := NewMax(test.limit)
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -37,19 +37,21 @@ func TestMaxIndex(t *testing.T) {
 }
 
 func BenchmarkIndexMax(b *testing.B) {
-	m := Max{10}
+	m := NewMax(10)
 
 	for i := 0; i < b.N; i++ {
-		m.Index(bench_pattern)
+		_, s := m.Index(bench_pattern)
+		releaseSegments(s)
 	}
 }
 
 func BenchmarkIndexMaxParallel(b *testing.B) {
-	m := Max{10}
+	m := NewMax(10)
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			m.Index(bench_pattern)
+			_, s := m.Index(bench_pattern)
+			releaseSegments(s)
 		}
 	})
 }
diff --git a/match/min.go b/match/min.go
index 6942e29..db57ac8 100644
--- a/match/min.go
+++ b/match/min.go
@@ -9,6 +9,10 @@ type Min struct {
 	Limit int
 }
 
+func NewMin(l int) Min {
+	return Min{l}
+}
+
 func (self Min) Match(s string) bool {
 	var l int
 	for range s {
@@ -24,7 +28,12 @@ func (self Min) Match(s string) bool {
 func (self Min) Index(s string) (int, []int) {
 	var count int
 
-	segments := make([]int, 0, len(s)-self.Limit+1)
+	c := len(s) - self.Limit + 1
+	if c <= 0 {
+		return -1, nil
+	}
+
+	segments := acquireSegments(c)
 	for i, r := range s {
 		count++
 		if count >= self.Limit {
diff --git a/match/min_test.go b/match/min_test.go
index 2bea4ee..ab854ae 100644
--- a/match/min_test.go
+++ b/match/min_test.go
@@ -25,7 +25,7 @@ func TestMinIndex(t *testing.T) {
 			[]int{3, 4},
 		},
 	} {
-		p := Min{test.limit}
+		p := NewMin(test.limit)
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -37,19 +37,21 @@ func TestMinIndex(t *testing.T) {
 }
 
 func BenchmarkIndexMin(b *testing.B) {
-	m := Min{10}
+	m := NewMin(10)
 
 	for i := 0; i < b.N; i++ {
-		m.Index(bench_pattern)
+		_, s := m.Index(bench_pattern)
+		releaseSegments(s)
 	}
 }
 
 func BenchmarkIndexMinParallel(b *testing.B) {
-	m := Min{10}
+	m := NewMin(10)
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			m.Index(bench_pattern)
+			_, s := m.Index(bench_pattern)
+			releaseSegments(s)
 		}
 	})
 }
diff --git a/match/nothing.go b/match/nothing.go
index 664ade9..0d4ecd3 100644
--- a/match/nothing.go
+++ b/match/nothing.go
@@ -6,6 +6,10 @@ import (
 
 type Nothing struct{}
 
+func NewNothing() Nothing {
+	return Nothing{}
+}
+
 func (self Nothing) Match(s string) bool {
 	return len(s) == 0
 }
diff --git a/match/nothing_test.go b/match/nothing_test.go
index 569969c..941c22d 100644
--- a/match/nothing_test.go
+++ b/match/nothing_test.go
@@ -22,7 +22,7 @@ func TestNothingIndex(t *testing.T) {
 			[]int{0},
 		},
 	} {
-		p := Nothing{}
+		p := NewNothing()
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -34,19 +34,21 @@ func TestNothingIndex(t *testing.T) {
 }
 
 func BenchmarkIndexNothing(b *testing.B) {
-	m := Nothing{}
+	m := NewNothing()
 
 	for i := 0; i < b.N; i++ {
-		m.Index(bench_pattern)
+		_, s := m.Index(bench_pattern)
+		releaseSegments(s)
 	}
 }
 
 func BenchmarkIndexNothingParallel(b *testing.B) {
-	m := Nothing{}
+	m := NewNothing()
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			m.Index(bench_pattern)
+			_, s := m.Index(bench_pattern)
+			releaseSegments(s)
 		}
 	})
 }
diff --git a/match/prefix.go b/match/prefix.go
index 429ff88..a734725 100644
--- a/match/prefix.go
+++ b/match/prefix.go
@@ -10,6 +10,10 @@ type Prefix struct {
 	Prefix string
 }
 
+func NewPrefix(p string) Prefix {
+	return Prefix{p}
+}
+
 func (self Prefix) Index(s string) (int, []int) {
 	idx := strings.Index(s, self.Prefix)
 	if idx == -1 {
diff --git a/match/prefix_suffix.go b/match/prefix_suffix.go
index 620b873..8208085 100644
--- a/match/prefix_suffix.go
+++ b/match/prefix_suffix.go
@@ -9,6 +9,10 @@ type PrefixSuffix struct {
 	Prefix, Suffix string
 }
 
+func NewPrefixSuffix(p, s string) PrefixSuffix {
+	return PrefixSuffix{p, s}
+}
+
 func (self PrefixSuffix) Index(s string) (int, []int) {
 	prefixIdx := strings.Index(s, self.Prefix)
 	if prefixIdx == -1 {
@@ -16,11 +20,14 @@ func (self PrefixSuffix) Index(s string) (int, []int) {
 	}
 
 	suffixLen := len(self.Suffix)
-
 	if suffixLen <= 0 {
 		return prefixIdx, []int{len(s) - prefixIdx}
 	}
 
+	if (len(s) - prefixIdx) <= 0 {
+		return -1, nil
+	}
+
 	segments := acquireSegments(len(s) - prefixIdx)
 	for sub := s[prefixIdx:]; ; {
 		suffixIdx := strings.LastIndex(sub, self.Suffix)
@@ -33,7 +40,8 @@ func (self PrefixSuffix) Index(s string) (int, []int) {
 	}
 
 	if len(segments) == 0 {
-		return -1, segments
+		releaseSegments(segments)
+		return -1, nil
 	}
 
 	reverseSegments(segments)
diff --git a/match/prefix_suffix_test.go b/match/prefix_suffix_test.go
index aaf5dca..79b17b2 100644
--- a/match/prefix_suffix_test.go
+++ b/match/prefix_suffix_test.go
@@ -35,7 +35,7 @@ func TestPrefixSuffixIndex(t *testing.T) {
 			[]int{3},
 		},
 	} {
-		p := PrefixSuffix{test.prefix, test.suffix}
+		p := NewPrefixSuffix(test.prefix, test.suffix)
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -47,7 +47,7 @@ func TestPrefixSuffixIndex(t *testing.T) {
 }
 
 func BenchmarkIndexPrefixSuffix(b *testing.B) {
-	m := PrefixSuffix{"qew", "sqw"}
+	m := NewPrefixSuffix("qew", "sqw")
 
 	for i := 0; i < b.N; i++ {
 		_, s := m.Index(bench_pattern)
@@ -56,7 +56,7 @@ func BenchmarkIndexPrefixSuffix(b *testing.B) {
 }
 
 func BenchmarkIndexPrefixSuffixParallel(b *testing.B) {
-	m := PrefixSuffix{"qew", "sqw"}
+	m := NewPrefixSuffix("qew", "sqw")
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
diff --git a/match/prefix_test.go b/match/prefix_test.go
index f6b2f04..22a296e 100644
--- a/match/prefix_test.go
+++ b/match/prefix_test.go
@@ -25,7 +25,7 @@ func TestPrefixIndex(t *testing.T) {
 			[]int{2, 3, 4, 5},
 		},
 	} {
-		p := Prefix{test.prefix}
+		p := NewPrefix(test.prefix)
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -37,7 +37,7 @@ func TestPrefixIndex(t *testing.T) {
 }
 
 func BenchmarkIndexPrefix(b *testing.B) {
-	m := Prefix{"qew"}
+	m := NewPrefix("qew")
 
 	for i := 0; i < b.N; i++ {
 		_, s := m.Index(bench_pattern)
@@ -46,7 +46,7 @@ func BenchmarkIndexPrefix(b *testing.B) {
 }
 
 func BenchmarkIndexPrefixParallel(b *testing.B) {
-	m := Prefix{"qew"}
+	m := NewPrefix("qew")
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
diff --git a/match/range.go b/match/range.go
index 8a90569..ce30245 100644
--- a/match/range.go
+++ b/match/range.go
@@ -10,6 +10,10 @@ type Range struct {
 	Not    bool
 }
 
+func NewRange(lo, hi rune, not bool) Range {
+	return Range{lo, hi, not}
+}
+
 func (self Range) Len() int {
 	return lenOne
 }
diff --git a/match/range_test.go b/match/range_test.go
index 1bde746..0dddcfd 100644
--- a/match/range_test.go
+++ b/match/range_test.go
@@ -35,7 +35,7 @@ func TestRangeIndex(t *testing.T) {
 			[]int{1},
 		},
 	} {
-		m := Range{test.lo, test.hi, test.not}
+		m := NewRange(test.lo, test.hi, test.not)
 		index, segments := m.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -47,7 +47,7 @@ func TestRangeIndex(t *testing.T) {
 }
 
 func BenchmarkIndexRange(b *testing.B) {
-	m := Range{'0', '9', false}
+	m := NewRange('0', '9', false)
 
 	for i := 0; i < b.N; i++ {
 		_, s := m.Index(bench_pattern)
@@ -56,7 +56,7 @@ func BenchmarkIndexRange(b *testing.B) {
 }
 
 func BenchmarkIndexRangeParallel(b *testing.B) {
-	m := Range{'0', '9', false}
+	m := NewRange('0', '9', false)
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
diff --git a/match/row.go b/match/row.go
index a836a5c..d0dcb35 100644
--- a/match/row.go
+++ b/match/row.go
@@ -10,9 +10,9 @@ type Row struct {
 	Segments    []int
 }
 
-func NewRow(m Matchers, len int) Row {
+func NewRow(len int, m ...Matcher) Row {
 	return Row{
-		Matchers:    m,
+		Matchers:    Matchers(m),
 		RunesLength: len,
 		Segments:    []int{len},
 	}
@@ -68,8 +68,6 @@ func (self Row) Index(s string) (int, []int) {
 
 	for i := range s {
 		// this is not strict check but useful
-		// when glob will be refactored for usage with []rune
-		// it will be better
 		if len(s[i:]) < self.RunesLength {
 			break
 		}
diff --git a/match/row_test.go b/match/row_test.go
index 0bd7bd8..c9e65ef 100644
--- a/match/row_test.go
+++ b/match/row_test.go
@@ -17,7 +17,7 @@ func TestRowIndex(t *testing.T) {
 			Matchers{
 				NewText("abc"),
 				NewText("def"),
-				Single{},
+				NewSingle(nil),
 			},
 			7,
 			"qweabcdefghij",
@@ -28,7 +28,7 @@ func TestRowIndex(t *testing.T) {
 			Matchers{
 				NewText("abc"),
 				NewText("def"),
-				Single{},
+				NewSingle(nil),
 			},
 			7,
 			"abcd",
@@ -36,10 +36,7 @@ func TestRowIndex(t *testing.T) {
 			nil,
 		},
 	} {
-		p := Row{
-			Matchers:    test.matchers,
-			RunesLength: test.length,
-		}
+		p := NewRow(test.length, test.matchers...)
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -51,14 +48,14 @@ func TestRowIndex(t *testing.T) {
 }
 
 func BenchmarkRowIndex(b *testing.B) {
-	m := Row{
-		Matchers: Matchers{
+	m := NewRow(
+		7,
+		Matchers{
 			NewText("abc"),
 			NewText("def"),
-			Single{},
-		},
-		RunesLength: 7,
-	}
+			NewSingle(nil),
+		}...,
+	)
 
 	for i := 0; i < b.N; i++ {
 		_, s := m.Index(bench_pattern)
@@ -67,14 +64,14 @@ func BenchmarkRowIndex(b *testing.B) {
 }
 
 func BenchmarkIndexRowParallel(b *testing.B) {
-	m := Row{
-		Matchers: Matchers{
+	m := NewRow(
+		7,
+		Matchers{
 			NewText("abc"),
 			NewText("def"),
-			Single{},
-		},
-		RunesLength: 7,
-	}
+			NewSingle(nil),
+		}...,
+	)
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
diff --git a/match/single.go b/match/single.go
index 6911edf..33e926d 100644
--- a/match/single.go
+++ b/match/single.go
@@ -11,6 +11,10 @@ type Single struct {
 	Separators []rune
 }
 
+func NewSingle(s []rune) Single {
+	return Single{s}
+}
+
 func (self Single) Match(s string) bool {
 	r, w := utf8.DecodeRuneInString(s)
 	if len(s) > w {
@@ -35,5 +39,5 @@ func (self Single) Index(s string) (int, []int) {
 }
 
 func (self Single) String() string {
-	return fmt.Sprintf("<single:![%s]>", self.Separators)
+	return fmt.Sprintf("<single:![%s]>", string(self.Separators))
 }
diff --git a/match/single_test.go b/match/single_test.go
index b08f236..a62d720 100644
--- a/match/single_test.go
+++ b/match/single_test.go
@@ -25,7 +25,7 @@ func TestSingleIndex(t *testing.T) {
 			nil,
 		},
 	} {
-		p := Single{test.separators}
+		p := NewSingle(test.separators)
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -37,7 +37,7 @@ func TestSingleIndex(t *testing.T) {
 }
 
 func BenchmarkIndexSingle(b *testing.B) {
-	m := Single{bench_separators}
+	m := NewSingle(bench_separators)
 
 	for i := 0; i < b.N; i++ {
 		_, s := m.Index(bench_pattern)
@@ -46,7 +46,7 @@ func BenchmarkIndexSingle(b *testing.B) {
 }
 
 func BenchmarkIndexSingleParallel(b *testing.B) {
-	m := Single{bench_separators}
+	m := NewSingle(bench_separators)
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
diff --git a/match/suffix.go b/match/suffix.go
index d38d71a..85bea8c 100644
--- a/match/suffix.go
+++ b/match/suffix.go
@@ -9,13 +9,8 @@ type Suffix struct {
 	Suffix string
 }
 
-func (self Suffix) Index(s string) (int, []int) {
-	idx := strings.Index(s, self.Suffix)
-	if idx == -1 {
-		return -1, nil
-	}
-
-	return 0, []int{idx + len(self.Suffix)}
+func NewSuffix(s string) Suffix {
+	return Suffix{s}
 }
 
 func (self Suffix) Len() int {
@@ -26,6 +21,15 @@ func (self Suffix) Match(s string) bool {
 	return strings.HasSuffix(s, self.Suffix)
 }
 
+func (self Suffix) Index(s string) (int, []int) {
+	idx := strings.Index(s, self.Suffix)
+	if idx == -1 {
+		return -1, nil
+	}
+
+	return 0, []int{idx + len(self.Suffix)}
+}
+
 func (self Suffix) String() string {
 	return fmt.Sprintf("<suffix:%s>", self.Suffix)
 }
diff --git a/match/suffix_test.go b/match/suffix_test.go
index 3e3c250..4904763 100644
--- a/match/suffix_test.go
+++ b/match/suffix_test.go
@@ -25,7 +25,7 @@ func TestSuffixIndex(t *testing.T) {
 			[]int{5},
 		},
 	} {
-		p := Suffix{test.prefix}
+		p := NewSuffix(test.prefix)
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -37,7 +37,7 @@ func TestSuffixIndex(t *testing.T) {
 }
 
 func BenchmarkIndexSuffix(b *testing.B) {
-	m := Suffix{"qwe"}
+	m := NewSuffix("qwe")
 
 	for i := 0; i < b.N; i++ {
 		_, s := m.Index(bench_pattern)
@@ -46,7 +46,7 @@ func BenchmarkIndexSuffix(b *testing.B) {
 }
 
 func BenchmarkIndexSuffixParallel(b *testing.B) {
-	m := Suffix{"qwe"}
+	m := NewSuffix("qwe")
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
diff --git a/match/super.go b/match/super.go
index e7f1aec..3875950 100644
--- a/match/super.go
+++ b/match/super.go
@@ -6,6 +6,10 @@ import (
 
 type Super struct{}
 
+func NewSuper() Super {
+	return Super{}
+}
+
 func (self Super) Match(s string) bool {
 	return true
 }
@@ -15,8 +19,7 @@ func (self Super) Len() int {
 }
 
 func (self Super) Index(s string) (int, []int) {
-	//todo acquire here
-	segments := make([]int, 0, len(s)+1)
+	segments := acquireSegments(len(s) + 1)
 	for i := range s {
 		segments = append(segments, i)
 	}
diff --git a/match/super_test.go b/match/super_test.go
index e7c2624..10418dc 100644
--- a/match/super_test.go
+++ b/match/super_test.go
@@ -22,7 +22,7 @@ func TestSuperIndex(t *testing.T) {
 			[]int{0},
 		},
 	} {
-		p := Super{}
+		p := NewSuper()
 		index, segments := p.Index(test.fixture)
 		if index != test.index {
 			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
@@ -34,7 +34,7 @@ func TestSuperIndex(t *testing.T) {
 }
 
 func BenchmarkIndexSuper(b *testing.B) {
-	m := Super{}
+	m := NewSuper()
 
 	for i := 0; i < b.N; i++ {
 		_, s := m.Index(bench_pattern)
@@ -43,7 +43,7 @@ func BenchmarkIndexSuper(b *testing.B) {
 }
 
 func BenchmarkIndexSuperParallel(b *testing.B) {
-	m := Super{}
+	m := NewSuper()
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {