From 2f7d4cd80daecfeba387f464a06c1a8d6e9e2723 Mon Sep 17 00:00:00 2001
From: John <john@johng.cn>
Date: Mon, 15 Apr 2019 22:55:12 +0800
Subject: [PATCH] fix issue in Add function for gtype.Float32/Float64

---
 TODO.MD                        |  1 +
 g/container/gtype/bool.go      | 18 +++++++-----
 g/container/gtype/byte.go      | 21 +++++++++-----
 g/container/gtype/bytes.go     | 14 +++++++---
 g/container/gtype/float32.go   | 50 +++++++++++++++++++---------------
 g/container/gtype/float64.go   | 50 +++++++++++++++++++---------------
 g/container/gtype/gtype.go     |  3 +-
 g/container/gtype/int.go       | 22 +++++++++------
 g/container/gtype/int32.go     | 20 ++++++++++----
 g/container/gtype/int64.go     | 18 ++++++++----
 g/container/gtype/interface.go | 18 ++++++------
 g/container/gtype/string.go    | 13 ++++++---
 g/container/gtype/uint.go      | 20 ++++++++++----
 g/container/gtype/uint32.go    | 20 ++++++++++----
 g/container/gtype/uint64.go    | 20 ++++++++++----
 geg/other/test.go              | 19 +++++++++----
 16 files changed, 209 insertions(+), 118 deletions(-)

diff --git a/TODO.MD b/TODO.MD
index e456a8c6c..6ac97bca3 100644
--- a/TODO.MD
+++ b/TODO.MD
@@ -44,6 +44,7 @@
 1. 添加sqlite数据库的单元测试用例；
 1. gredis增加cluster支持；
 1. gset.Add/Remove/Contains方法增加批量操作支持；
+1. gmlock增加手动清理机制：当内存锁不再使用时，由调用端决定是否清理内存锁；
 
 # DONE
 1.  gconv完善针对不同类型的判断，例如：尽量减少sprintf("%v", xxx)来执行string类型的转换；
diff --git a/g/container/gtype/bool.go b/g/container/gtype/bool.go
index 9ae7db583..e919ce9de 100644
--- a/g/container/gtype/bool.go
+++ b/g/container/gtype/bool.go
@@ -11,35 +11,39 @@ import (
 )
 
 type Bool struct {
-    val int32
+    value int32
 }
 
+// NewBool returns a concurrent-safe object for bool type,
+// with given initial value <value>.
 func NewBool(value...bool) *Bool {
     t := &Bool{}
     if len(value) > 0 {
         if value[0] {
-            t.val = 1
+            t.value = 1
         } else {
-            t.val = 0
+            t.value = 0
         }
     }
     return t
 }
 
+// Clone clones and returns a new concurrent-safe object for bool type.
 func (t *Bool) Clone() *Bool {
     return NewBool(t.Val())
 }
 
-// 并发安全设置变量值，返回之前的旧值
+// Set atomically stores value into t.valueue and returns the previous t.value value.
 func (t *Bool) Set(value bool) (old bool) {
     if value {
-        old = atomic.SwapInt32(&t.val, 1) == 1
+        old = atomic.SwapInt32(&t.value, 1) == 1
     } else {
-        old = atomic.SwapInt32(&t.val, 0) == 1
+        old = atomic.SwapInt32(&t.value, 0) == 1
     }
     return
 }
 
+// Val atomically loads t.valueue.
 func (t *Bool) Val() bool {
-    return atomic.LoadInt32(&t.val) > 0
+    return atomic.LoadInt32(&t.value) > 0
 }
diff --git a/g/container/gtype/byte.go b/g/container/gtype/byte.go
index 104df712c..e6acc2e2a 100644
--- a/g/container/gtype/byte.go
+++ b/g/container/gtype/byte.go
@@ -11,29 +11,36 @@ import (
 )
 
 type Byte struct {
-    val int32
+	value int32
 }
 
+// NewByte returns a concurrent-safe object for byte type,
+// with given initial value <value>.
 func NewByte(value...byte) *Byte {
     if len(value) > 0 {
-        return &Byte{val : int32(value[0])}
+        return &Byte{
+	        value : int32(value[0]),
+		}
     }
     return &Byte{}
 }
 
+// Clone clones and returns a new concurrent-safe object for byte type.
 func (t *Byte) Clone() *Byte {
     return NewByte(t.Val())
 }
 
-// 并发安全设置变量值，返回之前的旧值
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *Byte) Set(value byte) (old byte) {
-    return byte(atomic.SwapInt32(&t.val, int32(value)))
+    return byte(atomic.SwapInt32(&t.value, int32(value)))
 }
 
+// Val atomically loads t.value.
 func (t *Byte) Val() byte {
-    return byte(atomic.LoadInt32(&t.val))
+    return byte(atomic.LoadInt32(&t.value))
 }
 
-func (t *Byte) Add(delta int) byte {
-    return byte(atomic.AddInt32(&t.val, int32(delta)))
+// Add atomically adds delta to t.value and returns the new value.
+func (t *Byte) Add(delta int) (new byte) {
+    return byte(atomic.AddInt32(&t.value, int32(delta)))
 }
diff --git a/g/container/gtype/bytes.go b/g/container/gtype/bytes.go
index 125c92632..909b8f41d 100644
--- a/g/container/gtype/bytes.go
+++ b/g/container/gtype/bytes.go
@@ -9,29 +9,35 @@ package gtype
 import "sync/atomic"
 
 type Bytes struct {
-    val atomic.Value
+	value atomic.Value
 }
 
+// NewBytes returns a concurrent-safe object for []byte type,
+// with given initial value <value>.
 func NewBytes(value...[]byte) *Bytes {
     t := &Bytes{}
     if len(value) > 0 {
-        t.val.Store(value[0])
+        t.value.Store(value[0])
     }
     return t
 }
 
+// Clone clones and returns a new concurrent-safe object for []byte type.
 func (t *Bytes) Clone() *Bytes {
     return NewBytes(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
+// Note: The parameter <value> cannot be nil.
 func (t *Bytes) Set(value []byte) (old []byte) {
     old = t.Val()
-    t.val.Store(value)
+    t.value.Store(value)
     return
 }
 
+// Val atomically loads t.value.
 func (t *Bytes) Val() []byte {
-    if s := t.val.Load(); s != nil {
+    if s := t.value.Load(); s != nil {
         return s.([]byte)
     }
     return nil
diff --git a/g/container/gtype/float32.go b/g/container/gtype/float32.go
index 26a5d50b2..680910770 100644
--- a/g/container/gtype/float32.go
+++ b/g/container/gtype/float32.go
@@ -7,47 +7,53 @@
 package gtype
 
 import (
-    "sync/atomic"
-    "github.com/gogf/gf/g/encoding/gbinary"
+	"math"
+	"sync/atomic"
+	"unsafe"
 )
 
 type Float32 struct {
-    val uint32
+	value uint32
 }
 
+// NewFloat32 returns a concurrent-safe object for float32 type,
+// with given initial value <value>.
 func NewFloat32(value...float32) *Float32 {
     if len(value) > 0 {
-        return &Float32{ val : float32ToUint32InBits(value[0]) }
+        return &Float32{
+	        value : math.Float32bits(value[0]),
+		}
     }
     return &Float32{}
 }
 
+// Clone clones and returns a new concurrent-safe object for float32 type.
 func (t *Float32) Clone() *Float32 {
     return NewFloat32(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *Float32) Set(value float32) (old float32) {
-    return uint32ToFloat32InBits(atomic.SwapUint32(&t.val, float32ToUint32InBits(value)))
+    return math.Float32frombits(atomic.SwapUint32(&t.value, math.Float32bits(value)))
 }
 
+// Val atomically loads t.value.
 func (t *Float32) Val() float32 {
-    return uint32ToFloat32InBits(atomic.LoadUint32(&t.val))
+    return math.Float32frombits(atomic.LoadUint32(&t.value))
 }
 
-func (t *Float32) Add(delta float32) float32 {
-    return uint32ToFloat32InBits(atomic.AddUint32(&t.val, float32ToUint32InBits(delta)))
-}
-
-// 通过二进制的方式将float32转换为uint32(都是32bits)
-func float32ToUint32InBits(value float32) uint32 {
-    b := gbinary.Encode(value)
-    i := gbinary.DecodeToUint32(b)
-    return i
-}
-
-// 通过二进制的方式将uint32转换为float32(都是32bits)
-func uint32ToFloat32InBits(value uint32) float32 {
-    b := gbinary.Encode(value)
-    f := gbinary.DecodeToFloat32(b)
-    return f
+// Add atomically adds delta to t.value and returns the new value.
+func (t *Float32) Add(delta float32) (new float32) {
+	for {
+		old := math.Float32frombits(t.value)
+		new  = old + delta
+		if atomic.CompareAndSwapUint32(
+			(*uint32)(unsafe.Pointer(&t.value)),
+			math.Float32bits(old),
+			math.Float32bits(new),
+		) {
+			break
+		}
+	}
+	return
 }
\ No newline at end of file
diff --git a/g/container/gtype/float64.go b/g/container/gtype/float64.go
index 59896e7fe..1ffb6a03f 100644
--- a/g/container/gtype/float64.go
+++ b/g/container/gtype/float64.go
@@ -7,47 +7,53 @@
 package gtype
 
 import (
-    "sync/atomic"
-    "github.com/gogf/gf/g/encoding/gbinary"
+	"math"
+	"sync/atomic"
+	"unsafe"
 )
 
 type Float64 struct {
-    val uint64
+	value uint64
 }
 
+// NewFloat64 returns a concurrent-safe object for float64 type,
+// with given initial value <value>.
 func NewFloat64(value...float64) *Float64 {
     if len(value) > 0 {
-        return &Float64{ val : float64ToUint64InBits(value[0]) }
+        return &Float64{
+	        value : math.Float64bits(value[0]),
+		}
     }
     return &Float64{}
 }
 
+// Clone clones and returns a new concurrent-safe object for float64 type.
 func (t *Float64) Clone() *Float64 {
     return NewFloat64(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *Float64) Set(value float64) (old float64) {
-    return uint64ToFloat64InBits(atomic.SwapUint64(&t.val, float64ToUint64InBits(value)))
+    return math.Float64frombits(atomic.SwapUint64(&t.value, math.Float64bits(value)))
 }
 
+// Val atomically loads t.value.
 func (t *Float64) Val() float64 {
-    return uint64ToFloat64InBits(atomic.LoadUint64(&t.val))
+    return math.Float64frombits(atomic.LoadUint64(&t.value))
 }
 
-func (t *Float64) Add(delta float64) float64 {
-    return uint64ToFloat64InBits(atomic.AddUint64(&t.val, float64ToUint64InBits(delta)))
+// Add atomically adds delta to t.value and returns the new value.
+func (t *Float64) Add(delta float64) (new float64) {
+	for {
+		old := math.Float64frombits(t.value)
+		new  = old + delta
+		if atomic.CompareAndSwapUint64(
+			(*uint64)(unsafe.Pointer(&t.value)),
+			math.Float64bits(old),
+			math.Float64bits(new),
+		) {
+			break
+		}
+	}
+	return
 }
-
-// 通过二进制的方式将float64转换为uint64(都是64bits)
-func float64ToUint64InBits(value float64) uint64 {
-    b := gbinary.Encode(value)
-    i := gbinary.DecodeToUint64(b)
-    return i
-}
-
-// 通过二进制的方式将uint64转换为float64(都是64bits)
-func uint64ToFloat64InBits(value uint64) float64 {
-    b := gbinary.Encode(value)
-    f := gbinary.DecodeToFloat64(b)
-    return f
-}
\ No newline at end of file
diff --git a/g/container/gtype/gtype.go b/g/container/gtype/gtype.go
index d23d509bb..a1bcf92f8 100644
--- a/g/container/gtype/gtype.go
+++ b/g/container/gtype/gtype.go
@@ -4,11 +4,12 @@
 // If a copy of the MIT was not distributed with this file,
 // You can obtain one at https://github.com/gogf/gf.
 
-// Package gtype provides kinds of high performance, concurrent-safe/unsafe basic variable types.
+// Package gtype provides kinds of high performance and concurrent-safe basic variable types.
 package gtype
 
 type Type = Interface
 
+// See NewInterface.
 func New(value ... interface{}) *Type {
     return NewInterface(value...)
 }
\ No newline at end of file
diff --git a/g/container/gtype/int.go b/g/container/gtype/int.go
index d8b2f6a4a..6e240a873 100644
--- a/g/container/gtype/int.go
+++ b/g/container/gtype/int.go
@@ -11,30 +11,36 @@ import (
 )
 
 type Int struct {
-    val int64
+	value int64
 }
 
+// NewInt returns a concurrent-safe object for int type,
+// with given initial value <value>.
 func NewInt(value...int) *Int {
     if len(value) > 0 {
-        return &Int{val:int64(value[0])}
+        return &Int{
+	        value : int64(value[0]),
+		}
     }
     return &Int{}
 }
 
+// Clone clones and returns a new concurrent-safe object for int type.
 func (t *Int) Clone() *Int {
     return NewInt(t.Val())
 }
 
-// 并发安全设置变量值，返回之前的旧值
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *Int) Set(value int) (old int) {
-    return int(atomic.SwapInt64(&t.val, int64(value)))
+    return int(atomic.SwapInt64(&t.value, int64(value)))
 }
 
+// Val atomically loads t.value.
 func (t *Int) Val() int {
-    return int(atomic.LoadInt64(&t.val))
+    return int(atomic.LoadInt64(&t.value))
 }
 
-// 数值增加delta，并返回**新**的数值
-func (t *Int) Add(delta int) int {
-    return int(atomic.AddInt64(&t.val, int64(delta)))
+// Add atomically adds delta to t.value and returns the new value.
+func (t *Int) Add(delta int) (new int) {
+    return int(atomic.AddInt64(&t.value, int64(delta)))
 }
\ No newline at end of file
diff --git a/g/container/gtype/int32.go b/g/container/gtype/int32.go
index c98caa817..7802ebb0d 100644
--- a/g/container/gtype/int32.go
+++ b/g/container/gtype/int32.go
@@ -11,28 +11,36 @@ import (
 )
 
 type Int32 struct {
-    val int32
+	value int32
 }
 
+// NewInt32 returns a concurrent-safe object for int32 type,
+// with given initial value <value>.
 func NewInt32(value...int32) *Int32 {
     if len(value) > 0 {
-        return &Int32{val: value[0]}
+        return &Int32{
+	        value : value[0],
+		}
     }
     return &Int32{}
 }
 
+// Clone clones and returns a new concurrent-safe object for int32 type.
 func (t *Int32) Clone() *Int32 {
     return NewInt32(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *Int32) Set(value int32) (old int32) {
-    return atomic.SwapInt32(&t.val, value)
+    return atomic.SwapInt32(&t.value, value)
 }
 
+// Val atomically loads t.value.
 func (t *Int32) Val() int32 {
-    return atomic.LoadInt32(&t.val)
+    return atomic.LoadInt32(&t.value)
 }
 
-func (t *Int32) Add(delta int32) int32 {
-    return atomic.AddInt32(&t.val, delta)
+// Add atomically adds delta to t.value and returns the new value.
+func (t *Int32) Add(delta int32) (new int32) {
+    return atomic.AddInt32(&t.value, delta)
 }
\ No newline at end of file
diff --git a/g/container/gtype/int64.go b/g/container/gtype/int64.go
index 77f4a37d9..9758be4a8 100644
--- a/g/container/gtype/int64.go
+++ b/g/container/gtype/int64.go
@@ -11,28 +11,36 @@ import (
 )
 
 type Int64 struct {
-    val int64
+	value int64
 }
 
+// NewInt64 returns a concurrent-safe object for int64 type,
+// with given initial value <value>.
 func NewInt64(value...int64) *Int64 {
     if len(value) > 0 {
-        return &Int64{val:value[0]}
+        return &Int64{
+	        value : value[0],
+		}
     }
     return &Int64{}
 }
 
+// Clone clones and returns a new concurrent-safe object for int64 type.
 func (t *Int64) Clone() *Int64 {
     return NewInt64(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *Int64) Set(value int64) (old int64) {
-    return atomic.SwapInt64(&t.val, value)
+    return atomic.SwapInt64(&t.value, value)
 }
 
+// Val atomically loads t.value.
 func (t *Int64) Val() int64 {
-    return atomic.LoadInt64(&t.val)
+    return atomic.LoadInt64(&t.value)
 }
 
+// Add atomically adds delta to t.value and returns the new value.
 func (t *Int64) Add(delta int64) int64 {
-    return atomic.AddInt64(&t.val, delta)
+    return atomic.AddInt64(&t.value, delta)
 }
\ No newline at end of file
diff --git a/g/container/gtype/interface.go b/g/container/gtype/interface.go
index fd606656d..3dd1b1507 100644
--- a/g/container/gtype/interface.go
+++ b/g/container/gtype/interface.go
@@ -10,32 +10,34 @@ import (
     "sync/atomic"
 )
 
-// 比较通用的并发安全数据类型
 type Interface struct {
-    val atomic.Value
+	value atomic.Value
 }
 
+// NewInterface returns a concurrent-safe object for interface{} type,
+// with given initial value <value>.
 func NewInterface(value...interface{}) *Interface {
     t := &Interface{}
     if len(value) > 0 && value[0] != nil {
-        t.val.Store(value[0])
+        t.value.Store(value[0])
     }
     return t
 }
 
+// Clone clones and returns a new concurrent-safe object for interface{} type.
 func (t *Interface) Clone() *Interface {
     return NewInterface(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
+// Note: The parameter <value> cannot be nil.
 func (t *Interface) Set(value interface{}) (old interface{}) {
-    if value == nil {
-        return
-    }
     old = t.Val()
-    t.val.Store(value)
+    t.value.Store(value)
     return
 }
 
+// Val atomically loads t.value.
 func (t *Interface) Val() interface{} {
-    return t.val.Load()
+    return t.value.Load()
 }
\ No newline at end of file
diff --git a/g/container/gtype/string.go b/g/container/gtype/string.go
index 70b8c8959..f524d20bb 100644
--- a/g/container/gtype/string.go
+++ b/g/container/gtype/string.go
@@ -11,29 +11,34 @@ import (
 )
 
 type String struct {
-    val atomic.Value
+	value atomic.Value
 }
 
+// NewString returns a concurrent-safe object for string type,
+// with given initial value <value>.
 func NewString(value...string) *String {
     t := &String{}
     if len(value) > 0 {
-        t.val.Store(value[0])
+        t.value.Store(value[0])
     }
     return t
 }
 
+// Clone clones and returns a new concurrent-safe object for string type.
 func (t *String) Clone() *String {
     return NewString(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *String) Set(value string) (old string) {
     old = t.Val()
-    t.val.Store(value)
+    t.value.Store(value)
     return
 }
 
+// Val atomically loads t.value.
 func (t *String) Val() string {
-    s := t.val.Load()
+    s := t.value.Load()
     if s != nil {
         return s.(string)
     }
diff --git a/g/container/gtype/uint.go b/g/container/gtype/uint.go
index 4c8286df5..c9b5ad3d8 100644
--- a/g/container/gtype/uint.go
+++ b/g/container/gtype/uint.go
@@ -11,28 +11,36 @@ import (
 )
 
 type Uint struct {
-    val uint64
+	value uint64
 }
 
+// NewUint returns a concurrent-safe object for uint type,
+// with given initial value <value>.
 func NewUint(value...uint) *Uint {
     if len(value) > 0 {
-        return &Uint{val:uint64(value[0])}
+        return &Uint{
+	        value : uint64(value[0]),
+		}
     }
     return &Uint{}
 }
 
+// Clone clones and returns a new concurrent-safe object for uint type.
 func (t *Uint) Clone() *Uint {
     return NewUint(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *Uint) Set(value uint) (old uint) {
-    return uint(atomic.SwapUint64(&t.val, uint64(value)))
+    return uint(atomic.SwapUint64(&t.value, uint64(value)))
 }
 
+// Val atomically loads t.value.
 func (t *Uint) Val() uint {
-    return uint(atomic.LoadUint64(&t.val))
+    return uint(atomic.LoadUint64(&t.value))
 }
 
-func (t *Uint) Add(delta uint) int {
-    return int(atomic.AddUint64(&t.val, uint64(delta)))
+// Add atomically adds delta to t.value and returns the new value.
+func (t *Uint) Add(delta uint) (new uint) {
+    return uint(atomic.AddUint64(&t.value, uint64(delta)))
 }
\ No newline at end of file
diff --git a/g/container/gtype/uint32.go b/g/container/gtype/uint32.go
index 6596e3467..c3a18c904 100644
--- a/g/container/gtype/uint32.go
+++ b/g/container/gtype/uint32.go
@@ -11,28 +11,36 @@ import (
 )
 
 type Uint32 struct {
-    val uint32
+	value uint32
 }
 
+// NewUint32 returns a concurrent-safe object for uint32 type,
+// with given initial value <value>.
 func NewUint32(value...uint32) *Uint32 {
     if len(value) > 0 {
-        return &Uint32{val:value[0]}
+        return &Uint32{
+        	value : value[0],
+		}
     }
     return &Uint32{}
 }
 
+// Clone clones and returns a new concurrent-safe object for uint32 type.
 func (t *Uint32) Clone() *Uint32 {
     return NewUint32(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *Uint32) Set(value uint32) (old uint32) {
-    return atomic.SwapUint32(&t.val, value)
+    return atomic.SwapUint32(&t.value, value)
 }
 
+// Val atomically loads t.value.
 func (t *Uint32) Val() uint32 {
-    return atomic.LoadUint32(&t.val)
+    return atomic.LoadUint32(&t.value)
 }
 
-func (t *Uint32) Add(delta uint32) uint32 {
-    return atomic.AddUint32(&t.val, delta)
+// Add atomically adds delta to t.value and returns the new value.
+func (t *Uint32) Add(delta uint32) (new uint32) {
+    return atomic.AddUint32(&t.value, delta)
 }
\ No newline at end of file
diff --git a/g/container/gtype/uint64.go b/g/container/gtype/uint64.go
index 79d185312..9e63234e0 100644
--- a/g/container/gtype/uint64.go
+++ b/g/container/gtype/uint64.go
@@ -11,28 +11,36 @@ import (
 )
 
 type Uint64 struct {
-    val uint64
+	value uint64
 }
 
+// NewUint64 returns a concurrent-safe object for uint64 type,
+// with given initial value <value>.
 func NewUint64(value...uint64) *Uint64 {
     if len(value) > 0 {
-        return &Uint64{val:value[0]}
+        return &Uint64{
+	        value : value[0],
+		}
     }
     return &Uint64{}
 }
 
+// Clone clones and returns a new concurrent-safe object for uint64 type.
 func (t *Uint64) Clone() *Uint64 {
     return NewUint64(t.Val())
 }
 
+// Set atomically stores value into t.value and returns the previous t.value value.
 func (t *Uint64) Set(value uint64) (old uint64) {
-    return atomic.SwapUint64(&t.val, value)
+    return atomic.SwapUint64(&t.value, value)
 }
 
+// Val atomically loads t.value.
 func (t *Uint64) Val() uint64 {
-    return atomic.LoadUint64(&t.val)
+    return atomic.LoadUint64(&t.value)
 }
 
-func (t *Uint64) Add(delta uint64) uint64 {
-    return atomic.AddUint64(&t.val, delta)
+// Add atomically adds delta to t.value and returns the new value.
+func (t *Uint64) Add(delta uint64) (new uint64) {
+    return atomic.AddUint64(&t.value, delta)
 }
\ No newline at end of file
diff --git a/geg/other/test.go b/geg/other/test.go
index 63996a987..8de0ca94a 100644
--- a/geg/other/test.go
+++ b/geg/other/test.go
@@ -2,14 +2,21 @@ package main
 
 import (
 	"fmt"
-	"github.com/gogf/gf/g/util/grand"
+	"github.com/gogf/gf/g/container/gtype"
+	"github.com/gogf/gf/g/test/gtest"
 )
 
-
-
 func main() {
-	for {
-		fmt.Println(grand.Intn(100))
-	}
+
+	var add float32
+	add = 3.1415926
+
+	myF32 := gtype.NewFloat32(add)
+	myAdd := myF32.Add(float32(6.2951413))
+
+	add += float32(6.2951413)
+
+	fmt.Println(myF32.Val())
+	gtest.AssertEQ(myAdd, add)
 
 }
\ No newline at end of file