Auto merge of #12056 - PartiallyTyped:12050, r=xFrednet
Fixes: #12050 - `identity_op` correctly suggests a deference for coerced references When `identity_op` identifies a `no_op`, provides a suggestion, it also checks the type of the type of the variable. If the variable is a reference that's been coerced into a value, e.g. ``` let x = &0i32; let _ = x + 0; ``` the suggestion will now use a derefence. This is done by identifying whether the variable is a reference to an integral value, and then whether it gets dereferenced. changelog: false positive: [`identity_op`]: corrected suggestion for reference coerced to value. fixes: #12050
This commit is contained in:
bors
commit
2eb13d3a7c
4 changed files with 426 additions and 124 deletions
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@ -6,7 +6,9 @@
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clippy::unnecessary_operation,
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clippy::op_ref,
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clippy::double_parens,
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clippy::uninlined_format_args
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clippy::uninlined_format_args,
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clippy::borrow_deref_ref,
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clippy::deref_addrof
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)]
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use std::fmt::Write as _;
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@ -40,32 +42,45 @@ fn main() {
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let x = 0;
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x;
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//~^ ERROR: this operation has no effect
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x;
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//~^ ERROR: this operation has no effect
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x + 1;
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x;
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//~^ ERROR: this operation has no effect
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1 + x;
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x - ZERO; //no error, as we skip lookups (for now)
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x;
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//~^ ERROR: this operation has no effect
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((ZERO)) | x; //no error, as we skip lookups (for now)
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x;
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//~^ ERROR: this operation has no effect
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x;
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//~^ ERROR: this operation has no effect
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x / ONE; //no error, as we skip lookups (for now)
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x / 2; //no false positive
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x & NEG_ONE; //no error, as we skip lookups (for now)
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x;
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//~^ ERROR: this operation has no effect
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let u: u8 = 0;
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u;
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//~^ ERROR: this operation has no effect
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1 << 0; // no error, this case is allowed, see issue 3430
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42;
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//~^ ERROR: this operation has no effect
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1;
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//~^ ERROR: this operation has no effect
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42;
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//~^ ERROR: this operation has no effect
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x;
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//~^ ERROR: this operation has no effect
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x;
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//~^ ERROR: this operation has no effect
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let mut a = A(String::new());
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let b = a << 0; // no error: non-integer
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@ -73,10 +88,15 @@ fn main() {
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1 * Meter; // no error: non-integer
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2;
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//~^ ERROR: this operation has no effect
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-2;
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//~^ ERROR: this operation has no effect
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2 + x;
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//~^ ERROR: this operation has no effect
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-2 + x;
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//~^ ERROR: this operation has no effect
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x + 1;
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//~^ ERROR: this operation has no effect
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(x + 1) % 3; // no error
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4 % 3; // no error
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4 % -3; // no error
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@ -85,38 +105,110 @@ fn main() {
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let a = 0;
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let b = true;
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(if b { 1 } else { 2 });
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//~^ ERROR: this operation has no effect
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(if b { 1 } else { 2 }) + if b { 3 } else { 4 };
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//~^ ERROR: this operation has no effect
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(match a { 0 => 10, _ => 20 });
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//~^ ERROR: this operation has no effect
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(match a { 0 => 10, _ => 20 }) + match a { 0 => 30, _ => 40 };
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//~^ ERROR: this operation has no effect
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(if b { 1 } else { 2 }) + match a { 0 => 30, _ => 40 };
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//~^ ERROR: this operation has no effect
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(match a { 0 => 10, _ => 20 }) + if b { 3 } else { 4 };
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//~^ ERROR: this operation has no effect
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(if b { 1 } else { 2 });
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//~^ ERROR: this operation has no effect
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({ a }) + 3;
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//~^ ERROR: this operation has no effect
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({ a } * 2);
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//~^ ERROR: this operation has no effect
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(loop { let mut c = 0; if c == 10 { break c; } c += 1; }) + { a * 2 };
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//~^ ERROR: this operation has no effect
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fn f(_: i32) {
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todo!();
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}
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f(a + { 8 * 5 });
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//~^ ERROR: this operation has no effect
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f(if b { 1 } else { 2 } + 3);
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//~^ ERROR: this operation has no effect
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const _: i32 = { 2 * 4 } + 3;
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//~^ ERROR: this operation has no effect
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const _: i32 = { 1 + 2 * 3 } + 3;
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//~^ ERROR: this operation has no effect
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a as usize;
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//~^ ERROR: this operation has no effect
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let _ = a as usize;
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//~^ ERROR: this operation has no effect
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({ a } as usize);
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//~^ ERROR: this operation has no effect
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2 * { a };
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//~^ ERROR: this operation has no effect
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(({ a } + 4));
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//~^ ERROR: this operation has no effect
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1;
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//~^ ERROR: this operation has no effect
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// Issue #9904
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let x = 0i32;
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let _: i32 = x;
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//~^ ERROR: this operation has no effect
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}
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pub fn decide(a: bool, b: bool) -> u32 {
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(if a { 1 } else { 2 }) + if b { 3 } else { 5 }
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}
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/// The following tests are from / for issue #12050
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/// In short, the lint didn't work for coerced references,
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/// e.g. let x = &0; let y = x + 0;
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/// because the suggested fix was `let y = x;` but
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/// it should have been `let y = *x;`
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fn issue_12050() {
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{
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let x = &0i32;
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let _: i32 = *x;
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//~^ ERROR: this operation has no effect
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let _: i32 = *x;
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//~^ ERROR: this operation has no effect
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}
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{
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let x = &&0i32;
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let _: i32 = **x;
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//~^ ERROR: this operation has no effect
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let x = &&0i32;
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let _: i32 = **x;
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//~^ ERROR: this operation has no effect
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}
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{
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// this is just silly
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let x = &&&0i32;
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let _: i32 = ***x;
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//~^ ERROR: this operation has no effect
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let _: i32 = ***x;
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//~^ ERROR: this operation has no effect
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let x = 0i32;
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let _: i32 = *&x;
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//~^ ERROR: this operation has no effect
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let _: i32 = **&&x;
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//~^ ERROR: this operation has no effect
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let _: i32 = *&*&x;
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//~^ ERROR: this operation has no effect
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let _: i32 = **&&*&x;
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//~^ ERROR: this operation has no effect
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}
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{
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// this is getting ridiculous, but we should still see the same
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// error message so let's just keep going
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let x = &0i32;
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let _: i32 = ***&&*&x;
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//~^ ERROR: this operation has no effect
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let _: i32 = ***&&*&x;
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//~^ ERROR: this operation has no effect
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}
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}
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@ -6,7 +6,9 @@
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clippy::unnecessary_operation,
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clippy::op_ref,
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clippy::double_parens,
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clippy::uninlined_format_args
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clippy::uninlined_format_args,
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clippy::borrow_deref_ref,
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clippy::deref_addrof
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)]
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||||
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use std::fmt::Write as _;
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@ -40,32 +42,45 @@ fn main() {
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let x = 0;
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x + 0;
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//~^ ERROR: this operation has no effect
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x + (1 - 1);
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//~^ ERROR: this operation has no effect
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x + 1;
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0 + x;
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//~^ ERROR: this operation has no effect
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1 + x;
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x - ZERO; //no error, as we skip lookups (for now)
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x | (0);
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//~^ ERROR: this operation has no effect
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((ZERO)) | x; //no error, as we skip lookups (for now)
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x * 1;
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//~^ ERROR: this operation has no effect
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1 * x;
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//~^ ERROR: this operation has no effect
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x / ONE; //no error, as we skip lookups (for now)
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x / 2; //no false positive
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x & NEG_ONE; //no error, as we skip lookups (for now)
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-1 & x;
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//~^ ERROR: this operation has no effect
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let u: u8 = 0;
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u & 255;
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//~^ ERROR: this operation has no effect
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1 << 0; // no error, this case is allowed, see issue 3430
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42 << 0;
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//~^ ERROR: this operation has no effect
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1 >> 0;
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//~^ ERROR: this operation has no effect
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42 >> 0;
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//~^ ERROR: this operation has no effect
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&x >> 0;
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//~^ ERROR: this operation has no effect
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x >> &0;
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//~^ ERROR: this operation has no effect
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let mut a = A(String::new());
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let b = a << 0; // no error: non-integer
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@ -73,10 +88,15 @@ fn main() {
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1 * Meter; // no error: non-integer
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2 % 3;
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//~^ ERROR: this operation has no effect
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-2 % 3;
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//~^ ERROR: this operation has no effect
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2 % -3 + x;
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//~^ ERROR: this operation has no effect
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-2 % -3 + x;
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//~^ ERROR: this operation has no effect
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x + 1 % 3;
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//~^ ERROR: this operation has no effect
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(x + 1) % 3; // no error
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4 % 3; // no error
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4 % -3; // no error
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|
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@ -85,38 +105,110 @@ fn main() {
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let a = 0;
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let b = true;
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0 + if b { 1 } else { 2 };
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//~^ ERROR: this operation has no effect
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0 + if b { 1 } else { 2 } + if b { 3 } else { 4 };
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//~^ ERROR: this operation has no effect
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0 + match a { 0 => 10, _ => 20 };
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//~^ ERROR: this operation has no effect
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0 + match a { 0 => 10, _ => 20 } + match a { 0 => 30, _ => 40 };
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//~^ ERROR: this operation has no effect
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0 + if b { 1 } else { 2 } + match a { 0 => 30, _ => 40 };
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//~^ ERROR: this operation has no effect
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0 + match a { 0 => 10, _ => 20 } + if b { 3 } else { 4 };
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//~^ ERROR: this operation has no effect
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(if b { 1 } else { 2 }) + 0;
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//~^ ERROR: this operation has no effect
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0 + { a } + 3;
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//~^ ERROR: this operation has no effect
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0 + { a } * 2;
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//~^ ERROR: this operation has no effect
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0 + loop { let mut c = 0; if c == 10 { break c; } c += 1; } + { a * 2 };
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//~^ ERROR: this operation has no effect
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|
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fn f(_: i32) {
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todo!();
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}
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f(1 * a + { 8 * 5 });
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//~^ ERROR: this operation has no effect
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f(0 + if b { 1 } else { 2 } + 3);
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//~^ ERROR: this operation has no effect
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const _: i32 = { 2 * 4 } + 0 + 3;
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//~^ ERROR: this operation has no effect
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const _: i32 = 0 + { 1 + 2 * 3 } + 3;
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//~^ ERROR: this operation has no effect
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0 + a as usize;
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//~^ ERROR: this operation has no effect
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let _ = 0 + a as usize;
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//~^ ERROR: this operation has no effect
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0 + { a } as usize;
|
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//~^ ERROR: this operation has no effect
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|
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2 * (0 + { a });
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//~^ ERROR: this operation has no effect
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1 * ({ a } + 4);
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//~^ ERROR: this operation has no effect
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1 * 1;
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//~^ ERROR: this operation has no effect
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|
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// Issue #9904
|
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let x = 0i32;
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let _: i32 = &x + 0;
|
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//~^ ERROR: this operation has no effect
|
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}
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pub fn decide(a: bool, b: bool) -> u32 {
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0 + if a { 1 } else { 2 } + if b { 3 } else { 5 }
|
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}
|
||||
|
||||
/// The following tests are from / for issue #12050
|
||||
/// In short, the lint didn't work for coerced references,
|
||||
/// e.g. let x = &0; let y = x + 0;
|
||||
/// because the suggested fix was `let y = x;` but
|
||||
/// it should have been `let y = *x;`
|
||||
fn issue_12050() {
|
||||
{
|
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let x = &0i32;
|
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let _: i32 = *x + 0;
|
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//~^ ERROR: this operation has no effect
|
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let _: i32 = x + 0;
|
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//~^ ERROR: this operation has no effect
|
||||
}
|
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{
|
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let x = &&0i32;
|
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let _: i32 = **x + 0;
|
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//~^ ERROR: this operation has no effect
|
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let x = &&0i32;
|
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let _: i32 = *x + 0;
|
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//~^ ERROR: this operation has no effect
|
||||
}
|
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{
|
||||
// this is just silly
|
||||
let x = &&&0i32;
|
||||
let _: i32 = ***x + 0;
|
||||
//~^ ERROR: this operation has no effect
|
||||
let _: i32 = **x + 0;
|
||||
//~^ ERROR: this operation has no effect
|
||||
let x = 0i32;
|
||||
let _: i32 = *&x + 0;
|
||||
//~^ ERROR: this operation has no effect
|
||||
let _: i32 = **&&x + 0;
|
||||
//~^ ERROR: this operation has no effect
|
||||
let _: i32 = *&*&x + 0;
|
||||
//~^ ERROR: this operation has no effect
|
||||
let _: i32 = **&&*&x + 0;
|
||||
//~^ ERROR: this operation has no effect
|
||||
}
|
||||
{
|
||||
// this is getting ridiculous, but we should still see the same
|
||||
// error message so let's just keep going
|
||||
let x = &0i32;
|
||||
let _: i32 = **&&*&x + 0;
|
||||
//~^ ERROR: this operation has no effect
|
||||
let _: i32 = **&&*&x + 0;
|
||||
//~^ ERROR: this operation has no effect
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:42:5
|
||||
--> $DIR/identity_op.rs:44:5
|
||||
|
|
||||
LL | x + 0;
|
||||
| ^^^^^ help: consider reducing it to: `x`
|
||||
|
|
@ -8,238 +8,310 @@ LL | x + 0;
|
|||
= help: to override `-D warnings` add `#[allow(clippy::identity_op)]`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:43:5
|
||||
--> $DIR/identity_op.rs:46:5
|
||||
|
|
||||
LL | x + (1 - 1);
|
||||
| ^^^^^^^^^^^ help: consider reducing it to: `x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:45:5
|
||||
--> $DIR/identity_op.rs:49:5
|
||||
|
|
||||
LL | 0 + x;
|
||||
| ^^^^^ help: consider reducing it to: `x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:48:5
|
||||
--> $DIR/identity_op.rs:53:5
|
||||
|
|
||||
LL | x | (0);
|
||||
| ^^^^^^^ help: consider reducing it to: `x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:51:5
|
||||
--> $DIR/identity_op.rs:57:5
|
||||
|
|
||||
LL | x * 1;
|
||||
| ^^^^^ help: consider reducing it to: `x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:52:5
|
||||
--> $DIR/identity_op.rs:59:5
|
||||
|
|
||||
LL | 1 * x;
|
||||
| ^^^^^ help: consider reducing it to: `x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:58:5
|
||||
--> $DIR/identity_op.rs:66:5
|
||||
|
|
||||
LL | -1 & x;
|
||||
| ^^^^^^ help: consider reducing it to: `x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:61:5
|
||||
--> $DIR/identity_op.rs:70:5
|
||||
|
|
||||
LL | u & 255;
|
||||
| ^^^^^^^ help: consider reducing it to: `u`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:64:5
|
||||
--> $DIR/identity_op.rs:74:5
|
||||
|
|
||||
LL | 42 << 0;
|
||||
| ^^^^^^^ help: consider reducing it to: `42`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:65:5
|
||||
--> $DIR/identity_op.rs:76:5
|
||||
|
|
||||
LL | 1 >> 0;
|
||||
| ^^^^^^ help: consider reducing it to: `1`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:66:5
|
||||
--> $DIR/identity_op.rs:78:5
|
||||
|
|
||||
LL | 42 >> 0;
|
||||
| ^^^^^^^ help: consider reducing it to: `42`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:67:5
|
||||
--> $DIR/identity_op.rs:80:5
|
||||
|
|
||||
LL | &x >> 0;
|
||||
| ^^^^^^^ help: consider reducing it to: `x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:68:5
|
||||
--> $DIR/identity_op.rs:82:5
|
||||
|
|
||||
LL | x >> &0;
|
||||
| ^^^^^^^ help: consider reducing it to: `x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:75:5
|
||||
--> $DIR/identity_op.rs:90:5
|
||||
|
|
||||
LL | 2 % 3;
|
||||
| ^^^^^ help: consider reducing it to: `2`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:76:5
|
||||
--> $DIR/identity_op.rs:92:5
|
||||
|
|
||||
LL | -2 % 3;
|
||||
| ^^^^^^ help: consider reducing it to: `-2`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:77:5
|
||||
--> $DIR/identity_op.rs:94:5
|
||||
|
|
||||
LL | 2 % -3 + x;
|
||||
| ^^^^^^ help: consider reducing it to: `2`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:78:5
|
||||
--> $DIR/identity_op.rs:96:5
|
||||
|
|
||||
LL | -2 % -3 + x;
|
||||
| ^^^^^^^ help: consider reducing it to: `-2`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:79:9
|
||||
--> $DIR/identity_op.rs:98:9
|
||||
|
|
||||
LL | x + 1 % 3;
|
||||
| ^^^^^ help: consider reducing it to: `1`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:87:5
|
||||
--> $DIR/identity_op.rs:107:5
|
||||
|
|
||||
LL | 0 + if b { 1 } else { 2 };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `(if b { 1 } else { 2 })`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:88:5
|
||||
--> $DIR/identity_op.rs:109:5
|
||||
|
|
||||
LL | 0 + if b { 1 } else { 2 } + if b { 3 } else { 4 };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `(if b { 1 } else { 2 })`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:89:5
|
||||
--> $DIR/identity_op.rs:111:5
|
||||
|
|
||||
LL | 0 + match a { 0 => 10, _ => 20 };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `(match a { 0 => 10, _ => 20 })`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:90:5
|
||||
--> $DIR/identity_op.rs:113:5
|
||||
|
|
||||
LL | 0 + match a { 0 => 10, _ => 20 } + match a { 0 => 30, _ => 40 };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `(match a { 0 => 10, _ => 20 })`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:91:5
|
||||
--> $DIR/identity_op.rs:115:5
|
||||
|
|
||||
LL | 0 + if b { 1 } else { 2 } + match a { 0 => 30, _ => 40 };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `(if b { 1 } else { 2 })`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:92:5
|
||||
--> $DIR/identity_op.rs:117:5
|
||||
|
|
||||
LL | 0 + match a { 0 => 10, _ => 20 } + if b { 3 } else { 4 };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `(match a { 0 => 10, _ => 20 })`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:93:5
|
||||
--> $DIR/identity_op.rs:119:5
|
||||
|
|
||||
LL | (if b { 1 } else { 2 }) + 0;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `(if b { 1 } else { 2 })`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:95:5
|
||||
--> $DIR/identity_op.rs:122:5
|
||||
|
|
||||
LL | 0 + { a } + 3;
|
||||
| ^^^^^^^^^ help: consider reducing it to: `({ a })`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:96:5
|
||||
--> $DIR/identity_op.rs:124:5
|
||||
|
|
||||
LL | 0 + { a } * 2;
|
||||
| ^^^^^^^^^^^^^ help: consider reducing it to: `({ a } * 2)`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:97:5
|
||||
--> $DIR/identity_op.rs:126:5
|
||||
|
|
||||
LL | 0 + loop { let mut c = 0; if c == 10 { break c; } c += 1; } + { a * 2 };
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `(loop { let mut c = 0; if c == 10 { break c; } c += 1; })`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:102:7
|
||||
--> $DIR/identity_op.rs:133:7
|
||||
|
|
||||
LL | f(1 * a + { 8 * 5 });
|
||||
| ^^^^^ help: consider reducing it to: `a`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:103:7
|
||||
--> $DIR/identity_op.rs:135:7
|
||||
|
|
||||
LL | f(0 + if b { 1 } else { 2 } + 3);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `if b { 1 } else { 2 }`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:104:20
|
||||
--> $DIR/identity_op.rs:138:20
|
||||
|
|
||||
LL | const _: i32 = { 2 * 4 } + 0 + 3;
|
||||
| ^^^^^^^^^^^^^ help: consider reducing it to: `{ 2 * 4 }`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:105:20
|
||||
--> $DIR/identity_op.rs:140:20
|
||||
|
|
||||
LL | const _: i32 = 0 + { 1 + 2 * 3 } + 3;
|
||||
| ^^^^^^^^^^^^^^^^^ help: consider reducing it to: `{ 1 + 2 * 3 }`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:107:5
|
||||
--> $DIR/identity_op.rs:143:5
|
||||
|
|
||||
LL | 0 + a as usize;
|
||||
| ^^^^^^^^^^^^^^ help: consider reducing it to: `a as usize`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:108:13
|
||||
--> $DIR/identity_op.rs:145:13
|
||||
|
|
||||
LL | let _ = 0 + a as usize;
|
||||
| ^^^^^^^^^^^^^^ help: consider reducing it to: `a as usize`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:109:5
|
||||
--> $DIR/identity_op.rs:147:5
|
||||
|
|
||||
LL | 0 + { a } as usize;
|
||||
| ^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `({ a } as usize)`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:111:9
|
||||
--> $DIR/identity_op.rs:150:9
|
||||
|
|
||||
LL | 2 * (0 + { a });
|
||||
| ^^^^^^^^^^^ help: consider reducing it to: `{ a }`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:112:5
|
||||
--> $DIR/identity_op.rs:152:5
|
||||
|
|
||||
LL | 1 * ({ a } + 4);
|
||||
| ^^^^^^^^^^^^^^^ help: consider reducing it to: `(({ a } + 4))`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:113:5
|
||||
--> $DIR/identity_op.rs:154:5
|
||||
|
|
||||
LL | 1 * 1;
|
||||
| ^^^^^ help: consider reducing it to: `1`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:117:18
|
||||
--> $DIR/identity_op.rs:159:18
|
||||
|
|
||||
LL | let _: i32 = &x + 0;
|
||||
| ^^^^^^ help: consider reducing it to: `x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:121:5
|
||||
--> $DIR/identity_op.rs:164:5
|
||||
|
|
||||
LL | 0 + if a { 1 } else { 2 } + if b { 3 } else { 5 }
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider reducing it to: `(if a { 1 } else { 2 })`
|
||||
|
||||
error: aborting due to 40 previous errors
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:175:22
|
||||
|
|
||||
LL | let _: i32 = *x + 0;
|
||||
| ^^^^^^ help: consider reducing it to: `*x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:177:22
|
||||
|
|
||||
LL | let _: i32 = x + 0;
|
||||
| ^^^^^ help: consider reducing it to: `*x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:182:22
|
||||
|
|
||||
LL | let _: i32 = **x + 0;
|
||||
| ^^^^^^^ help: consider reducing it to: `**x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:185:22
|
||||
|
|
||||
LL | let _: i32 = *x + 0;
|
||||
| ^^^^^^ help: consider reducing it to: `**x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:191:22
|
||||
|
|
||||
LL | let _: i32 = ***x + 0;
|
||||
| ^^^^^^^^ help: consider reducing it to: `***x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:193:22
|
||||
|
|
||||
LL | let _: i32 = **x + 0;
|
||||
| ^^^^^^^ help: consider reducing it to: `***x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:196:22
|
||||
|
|
||||
LL | let _: i32 = *&x + 0;
|
||||
| ^^^^^^^ help: consider reducing it to: `*&x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:198:22
|
||||
|
|
||||
LL | let _: i32 = **&&x + 0;
|
||||
| ^^^^^^^^^ help: consider reducing it to: `**&&x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:200:22
|
||||
|
|
||||
LL | let _: i32 = *&*&x + 0;
|
||||
| ^^^^^^^^^ help: consider reducing it to: `*&*&x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:202:22
|
||||
|
|
||||
LL | let _: i32 = **&&*&x + 0;
|
||||
| ^^^^^^^^^^^ help: consider reducing it to: `**&&*&x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:209:22
|
||||
|
|
||||
LL | let _: i32 = **&&*&x + 0;
|
||||
| ^^^^^^^^^^^ help: consider reducing it to: `***&&*&x`
|
||||
|
||||
error: this operation has no effect
|
||||
--> $DIR/identity_op.rs:211:22
|
||||
|
|
||||
LL | let _: i32 = **&&*&x + 0;
|
||||
| ^^^^^^^^^^^ help: consider reducing it to: `***&&*&x`
|
||||
|
||||
error: aborting due to 52 previous errors
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue