Better const pattern example

ecstatic-morse · ecstatic-morse · commit e67c40bb165d · 2020-06-02T09:30:29.000-07:00
diff --git a/text/0000-inline-const.md b/text/0000-inline-const.md
@@ -22,10 +22,16 @@ fn mock_ip(use_localhost: bool) -> &'static Ipv6Addr {
     }
 }
 
+const MMIO_BIT1: u8 = 4;
+const MMIO_BIT2: u8 = 5;
+
 fn main() {
-    match *x {
-        0 ..= const { u32::MAX / 2 } => println!("low"),
-        const { u32::MAX / 2 + 1 } ..= u32::MAX => println!("high"),
+    match read_mmio() {
+        0 => {}
+        const { 1 << MMIO_BIT1 } => println!("FOO"),
+        const { 1 << MMIO_BIT2 } => println!("BAR"),
+
+        _ => unreachable!(),
     }
 }
 ```

Original file line number	Diff line number	Diff line change
`@@ -22,10 +22,16 @@ fn mock_ip(use_localhost: bool) -> &'static Ipv6Addr {`
`22`	`22`	`}`
`23`	`23`	`}`
`24`	`24`
	`25`	`+const MMIO_BIT1: u8 = 4;`
	`26`	`+const MMIO_BIT2: u8 = 5;`
	`27`	`+`
`25`	`28`	`fn main() {`
`26`		`- match *x {`
`27`		`- 0 ..= const { u32::MAX / 2 } => println!("low"),`
`28`		`- const { u32::MAX / 2 + 1 } ..= u32::MAX => println!("high"),`
	`29`	`+ match read_mmio() {`
	`30`	`+ 0 => {}`
	`31`	`+ const { 1 << MMIO_BIT1 } => println!("FOO"),`
	`32`	`+ const { 1 << MMIO_BIT2 } => println!("BAR"),`
	`33`	`+`
	`34`	`+ _ => unreachable!(),`
`29`	`35`	`}`
`30`	`36`	`}`
`31`	`37`	```