add demo for go1.14-examples and upgrade go version to go1.14 for go.mod

Author: bigwhite

go.mod

@@ -1,6 +1,6 @@
 module github.com/bigwhite/experiments
 
-go 1.12
+go 1.14
 
 require (
 	github.com/bigwhite/gocmpp v0.0.0-20190917110902-55b5d3d9ff3b

go1.14-examples/compiler_checkptr1.go

@@ -0,0 +1,12 @@
+package main
+
+import (
+	"fmt"
+	"unsafe"
+)
+
+func main() {
+	var byteArray = [10]byte{'a', 'b', 'c'}
+	var p *int64 = (*int64)(unsafe.Pointer(&byteArray[1]))
+	fmt.Println(*p)
+}

go1.14-examples/compiler_checkptr2.go

@@ -0,0 +1,12 @@
+package main
+
+import (
+	"unsafe"
+)
+
+func main() {
+	var n = 5
+	b := make([]byte, n)
+	end := unsafe.Pointer(uintptr(unsafe.Pointer(&b[0])) + uintptr(n+10))
+	_ = end
+}