Clean up unneeded warnings from let-else syntax test
This commit is contained in:
David Tolnay
parent
d25cf6fc14
commit
f4931437c2
2 changed files with 69 additions and 290 deletions
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@ -3,8 +3,7 @@
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#![feature(explicit_tail_calls)]
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fn a() {
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let foo = {
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//~^ WARN irrefutable `let...else` pattern
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let 0 = {
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1
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -22,8 +21,7 @@ fn b() {
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}
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fn c() {
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let foo = if true {
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//~^ WARN irrefutable `let...else` pattern
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let 0 = if true {
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1
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} else {
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0
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@ -43,8 +41,7 @@ fn d() {
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}
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fn e() {
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let foo = match true {
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//~^ WARN irrefutable `let...else` pattern
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let 0 = match true {
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true => 1,
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false => 0
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} else {
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@ -53,10 +50,12 @@ fn e() {
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};
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}
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struct X {a: i32}
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fn f() {
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let foo = X {
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//~^ WARN irrefutable `let...else` pattern
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struct X {
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a: i32,
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}
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let X { a: 0 } = X {
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a: 1
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -74,8 +73,7 @@ fn g() {
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}
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fn h() {
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let foo = const {
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//~^ WARN irrefutable `let...else` pattern
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let 0 = const {
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1
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -84,8 +82,7 @@ fn h() {
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}
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fn i() {
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let foo = &{
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//~^ WARN irrefutable `let...else` pattern
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let 0 = &{
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1
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -94,8 +91,8 @@ fn i() {
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}
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fn j() {
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let bar = 0;
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let foo = bar = { //~ ERROR: cannot assign twice
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let mut bar = 0;
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let foo = bar = {
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//~^ WARN irrefutable `let...else` pattern
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1
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} else {
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@ -105,8 +102,7 @@ fn j() {
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}
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fn k() {
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let foo = 1 + {
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//~^ WARN irrefutable `let...else` pattern
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let 0 = 1 + {
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1
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -115,8 +111,8 @@ fn k() {
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}
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fn l() {
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let foo = 1..{
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//~^ WARN irrefutable `let...else` pattern
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const RANGE: std::ops::Range<u8> = 0..0;
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let RANGE = 1..{
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1
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -125,8 +121,7 @@ fn l() {
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}
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fn m() {
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let foo = return {
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//~^ WARN irrefutable `let...else` pattern
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let 0 = return {
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()
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -135,8 +130,7 @@ fn m() {
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}
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fn n() {
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let foo = -{
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//~^ WARN irrefutable `let...else` pattern
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let 0 = -{
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1
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -145,8 +139,7 @@ fn n() {
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}
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fn o() -> Result<(), ()> {
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let foo = do yeet {
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//~^ WARN irrefutable `let...else` pattern
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let 0 = do yeet {
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()
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -155,8 +148,7 @@ fn o() -> Result<(), ()> {
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}
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fn p() {
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let foo = become {
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//~^ WARN irrefutable `let...else` pattern
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let 0 = become {
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()
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} else {
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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@ -185,22 +177,23 @@ fn r() {
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fn s() {
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macro_rules! a {
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() => { {} }
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//~^ WARN irrefutable `let...else` pattern
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//~| WARN irrefutable `let...else` pattern
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() => {
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{ 1 }
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};
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}
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macro_rules! b {
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(1) => {
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let x = a!() else { return; };
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let 0 = a!() else { return; };
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};
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(2) => {
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let x = a! {} else { return; };
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let 0 = a! {} else { return; };
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//~^ ERROR right curly brace `}` before `else` in a `let...else` statement not allowed
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};
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}
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b!(1); b!(2);
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b!(1);
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b!(2);
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}
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fn main() {}
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@ -1,19 +1,18 @@
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:9:5
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--> $DIR/bad-let-else-statement.rs:8:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = ({
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LL |
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LL ~ let 0 = ({
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LL | 1
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LL ~ }) else {
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error: `for...else` loops are not supported
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--> $DIR/bad-let-else-statement.rs:18:7
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--> $DIR/bad-let-else-statement.rs:17:7
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LL | let foo = for i in 1..2 {
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| --- `else` is attached to this loop
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@ -28,22 +27,22 @@ LL | | };
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= note: consider moving this `else` clause to a separate `if` statement and use a `bool` variable to control if it should run
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:30:5
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--> $DIR/bad-let-else-statement.rs:28:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = (if true {
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LL |
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...
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LL ~ let 0 = (if true {
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LL | 1
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LL | } else {
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LL | 0
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LL ~ }) else {
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error: `loop...else` loops are not supported
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--> $DIR/bad-let-else-statement.rs:39:7
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--> $DIR/bad-let-else-statement.rs:37:7
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LL | let foo = loop {
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| ---- `else` is attached to this loop
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@ -58,36 +57,34 @@ LL | | };
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= note: consider moving this `else` clause to a separate `if` statement and use a `bool` variable to control if it should run
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:50:5
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--> $DIR/bad-let-else-statement.rs:47:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = (match true {
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LL |
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LL ~ let 0 = (match true {
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LL | true => 1,
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LL | false => 0
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LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:61:5
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--> $DIR/bad-let-else-statement.rs:60:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = (X {
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LL |
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LL ~ let X { a: 0 } = (X {
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LL | a: 1
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LL ~ }) else {
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error: `while...else` loops are not supported
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--> $DIR/bad-let-else-statement.rs:70:7
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--> $DIR/bad-let-else-statement.rs:69:7
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LL | let foo = while false {
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| ----- `else` is attached to this loop
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@ -102,35 +99,33 @@ LL | | };
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= note: consider moving this `else` clause to a separate `if` statement and use a `bool` variable to control if it should run
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:80:5
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--> $DIR/bad-let-else-statement.rs:78:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = (const {
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LL |
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LL ~ let 0 = (const {
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LL | 1
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LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:90:5
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--> $DIR/bad-let-else-statement.rs:87:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = &({
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LL |
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LL ~ let 0 = &({
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LL | 1
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LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:101:5
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--> $DIR/bad-let-else-statement.rs:98:5
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LL | } else {
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| ^
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@ -144,91 +139,85 @@ LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:111:5
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--> $DIR/bad-let-else-statement.rs:107:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = 1 + ({
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LL |
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LL ~ let 0 = 1 + ({
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LL | 1
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LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:121:5
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--> $DIR/bad-let-else-statement.rs:117:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = 1..({
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LL |
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LL ~ let RANGE = 1..({
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LL | 1
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LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:131:5
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--> $DIR/bad-let-else-statement.rs:126:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = return ({
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LL |
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LL ~ let 0 = return ({
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LL | ()
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LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:141:5
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--> $DIR/bad-let-else-statement.rs:135:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = -({
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LL |
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LL ~ let 0 = -({
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LL | 1
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LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:151:5
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--> $DIR/bad-let-else-statement.rs:144:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = do yeet ({
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LL |
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LL ~ let 0 = do yeet ({
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LL | ()
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LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:161:5
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--> $DIR/bad-let-else-statement.rs:153:5
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LL | } else {
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| ^
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help: wrap the expression in parentheses
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LL ~ let foo = become ({
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LL |
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LL ~ let 0 = become ({
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LL | ()
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LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:171:5
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--> $DIR/bad-let-else-statement.rs:163:5
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LL | } else {
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| ^
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@ -242,7 +231,7 @@ LL ~ }) else {
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:181:31
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--> $DIR/bad-let-else-statement.rs:173:31
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LL | let bad = format_args! {""} else { return; };
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| ^
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@ -253,24 +242,24 @@ LL | let bad = format_args! ("") else { return; };
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| ~ ~
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error: right curly brace `}` before `else` in a `let...else` statement not allowed
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--> $DIR/bad-let-else-statement.rs:198:25
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--> $DIR/bad-let-else-statement.rs:190:25
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LL | let x = a! {} else { return; };
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LL | let 0 = a! {} else { return; };
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| ^
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...
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LL | b!(1); b!(2);
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| ----- in this macro invocation
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LL | b!(2);
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| ----- in this macro invocation
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= note: this error originates in the macro `b` (in Nightly builds, run with -Z macro-backtrace for more info)
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help: use parentheses instead of braces for this macro
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LL | let x = a! () else { return; };
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LL | let 0 = a! () else { return; };
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| ~~
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warning: irrefutable `let...else` pattern
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--> $DIR/bad-let-else-statement.rs:6:5
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--> $DIR/bad-let-else-statement.rs:95:5
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LL | / let foo = {
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LL | / let foo = bar = {
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LL | |
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LL | | 1
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LL | | } else {
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@ -281,169 +270,7 @@ LL | | } else {
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= note: `#[warn(irrefutable_let_patterns)]` on by default
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warning: irrefutable `let...else` pattern
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--> $DIR/bad-let-else-statement.rs:25:5
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LL | / let foo = if true {
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LL | |
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LL | | 1
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LL | | } else {
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LL | | 0
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LL | | } else {
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| |_____^
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= note: this pattern will always match, so the `else` clause is useless
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= help: consider removing the `else` clause
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warning: irrefutable `let...else` pattern
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--> $DIR/bad-let-else-statement.rs:46:5
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LL | / let foo = match true {
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LL | |
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LL | | true => 1,
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LL | | false => 0
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LL | | } else {
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| |_____^
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|
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= note: this pattern will always match, so the `else` clause is useless
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= help: consider removing the `else` clause
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warning: irrefutable `let...else` pattern
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--> $DIR/bad-let-else-statement.rs:58:5
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LL | / let foo = X {
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LL | |
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LL | | a: 1
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LL | | } else {
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| |_____^
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|
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= note: this pattern will always match, so the `else` clause is useless
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= help: consider removing the `else` clause
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warning: irrefutable `let...else` pattern
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--> $DIR/bad-let-else-statement.rs:77:5
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LL | / let foo = const {
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LL | |
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LL | | 1
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LL | | } else {
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| |_____^
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|
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= note: this pattern will always match, so the `else` clause is useless
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= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:87:5
|
||||
|
|
||||
LL | / let foo = &{
|
||||
LL | |
|
||||
LL | | 1
|
||||
LL | | } else {
|
||||
| |_____^
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:98:5
|
||||
|
|
||||
LL | / let foo = bar = {
|
||||
LL | |
|
||||
LL | | 1
|
||||
LL | | } else {
|
||||
| |_____^
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
|
||||
error[E0384]: cannot assign twice to immutable variable `bar`
|
||||
--> $DIR/bad-let-else-statement.rs:98:15
|
||||
|
|
||||
LL | let bar = 0;
|
||||
| ---
|
||||
| |
|
||||
| first assignment to `bar`
|
||||
| help: consider making this binding mutable: `mut bar`
|
||||
LL | let foo = bar = {
|
||||
| _______________^
|
||||
LL | |
|
||||
LL | | 1
|
||||
LL | | } else {
|
||||
| |_____^ cannot assign twice to immutable variable
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:108:5
|
||||
|
|
||||
LL | / let foo = 1 + {
|
||||
LL | |
|
||||
LL | | 1
|
||||
LL | | } else {
|
||||
| |_____^
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:118:5
|
||||
|
|
||||
LL | / let foo = 1..{
|
||||
LL | |
|
||||
LL | | 1
|
||||
LL | | } else {
|
||||
| |_____^
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:128:5
|
||||
|
|
||||
LL | / let foo = return {
|
||||
LL | |
|
||||
LL | | ()
|
||||
LL | | } else {
|
||||
| |_____^
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:138:5
|
||||
|
|
||||
LL | / let foo = -{
|
||||
LL | |
|
||||
LL | | 1
|
||||
LL | | } else {
|
||||
| |_____^
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:148:5
|
||||
|
|
||||
LL | / let foo = do yeet {
|
||||
LL | |
|
||||
LL | | ()
|
||||
LL | | } else {
|
||||
| |_____^
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:158:5
|
||||
|
|
||||
LL | / let foo = become {
|
||||
LL | |
|
||||
LL | | ()
|
||||
LL | | } else {
|
||||
| |_____^
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:168:5
|
||||
--> $DIR/bad-let-else-statement.rs:160:5
|
||||
|
|
||||
LL | / let foo = |x: i32| {
|
||||
LL | |
|
||||
|
|
@ -455,7 +282,7 @@ LL | | } else {
|
|||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:178:5
|
||||
--> $DIR/bad-let-else-statement.rs:170:5
|
||||
|
|
||||
LL | let ok = format_args!("") else { return; };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
@ -464,7 +291,7 @@ LL | let ok = format_args!("") else { return; };
|
|||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:181:5
|
||||
--> $DIR/bad-let-else-statement.rs:173:5
|
||||
|
|
||||
LL | let bad = format_args! {""} else { return; };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
@ -472,46 +299,5 @@ LL | let bad = format_args! {""} else { return; };
|
|||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:188:19
|
||||
|
|
||||
LL | () => { {} }
|
||||
| ___________________^
|
||||
LL | |
|
||||
LL | |
|
||||
LL | | }
|
||||
... |
|
||||
LL | | (1) => {
|
||||
LL | | let x = a!() else { return; };
|
||||
| |____________^
|
||||
...
|
||||
LL | b!(1); b!(2);
|
||||
| ----- in this macro invocation
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
= note: this warning originates in the macro `b` (in Nightly builds, run with -Z macro-backtrace for more info)
|
||||
error: aborting due to 19 previous errors; 4 warnings emitted
|
||||
|
||||
warning: irrefutable `let...else` pattern
|
||||
--> $DIR/bad-let-else-statement.rs:188:19
|
||||
|
|
||||
LL | () => { {} }
|
||||
| ___________________^
|
||||
LL | |
|
||||
LL | |
|
||||
LL | | }
|
||||
... |
|
||||
LL | | (2) => {
|
||||
LL | | let x = a! {} else { return; };
|
||||
| |____________^
|
||||
...
|
||||
LL | b!(1); b!(2);
|
||||
| ----- in this macro invocation
|
||||
|
|
||||
= note: this pattern will always match, so the `else` clause is useless
|
||||
= help: consider removing the `else` clause
|
||||
= note: this warning originates in the macro `b` (in Nightly builds, run with -Z macro-backtrace for more info)
|
||||
|
||||
error: aborting due to 20 previous errors; 18 warnings emitted
|
||||
|
||||
For more information about this error, try `rustc --explain E0384`.
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue