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rust-clippy/tests/ui/if_same_then_else.rs
2019-03-10 18:06:28 +00:00

262 lines
4.6 KiB
Rust

#![warn(clippy::if_same_then_else)]
#![allow(
clippy::blacklisted_name,
clippy::collapsible_if,
clippy::cognitive_complexity,
clippy::eq_op,
clippy::needless_return,
clippy::never_loop,
clippy::no_effect,
clippy::zero_divided_by_zero,
clippy::unused_unit
)]
struct Foo {
bar: u8,
}
fn foo() -> bool {
unimplemented!()
}
fn if_same_then_else() -> Result<&'static str, ()> {
if true {
Foo { bar: 42 };
0..10;
..;
0..;
..10;
0..=10;
foo();
} else {
//~ ERROR same body as `if` block
Foo { bar: 42 };
0..10;
..;
0..;
..10;
0..=10;
foo();
}
if true {
Foo { bar: 42 };
} else {
Foo { bar: 43 };
}
if true {
();
} else {
()
}
if true {
0..10;
} else {
0..=10;
}
if true {
foo();
foo();
} else {
foo();
}
let _ = if true {
0.0
} else {
//~ ERROR same body as `if` block
0.0
};
let _ = if true {
-0.0
} else {
//~ ERROR same body as `if` block
-0.0
};
let _ = if true { 0.0 } else { -0.0 };
// Different NaNs
let _ = if true { 0.0 / 0.0 } else { std::f32::NAN };
if true {
foo();
}
let _ = if true {
42
} else {
//~ ERROR same body as `if` block
42
};
if true {
for _ in &[42] {
let foo: &Option<_> = &Some::<u8>(42);
if true {
break;
} else {
continue;
}
}
} else {
//~ ERROR same body as `if` block
for _ in &[42] {
let foo: &Option<_> = &Some::<u8>(42);
if true {
break;
} else {
continue;
}
}
}
if true {
let bar = if true { 42 } else { 43 };
while foo() {
break;
}
bar + 1;
} else {
//~ ERROR same body as `if` block
let bar = if true { 42 } else { 43 };
while foo() {
break;
}
bar + 1;
}
if true {
let _ = match 42 {
42 => 1,
a if a > 0 => 2,
10..=15 => 3,
_ => 4,
};
} else if false {
foo();
} else if foo() {
let _ = match 42 {
42 => 1,
a if a > 0 => 2,
10..=15 => 3,
_ => 4,
};
}
if true {
if let Some(a) = Some(42) {}
} else {
//~ ERROR same body as `if` block
if let Some(a) = Some(42) {}
}
if true {
if let (1, .., 3) = (1, 2, 3) {}
} else {
//~ ERROR same body as `if` block
if let (1, .., 3) = (1, 2, 3) {}
}
if true {
if let (1, .., 3) = (1, 2, 3) {}
} else {
if let (.., 3) = (1, 2, 3) {}
}
if true {
if let (1, .., 3) = (1, 2, 3) {}
} else {
if let (.., 4) = (1, 2, 3) {}
}
if true {
if let (1, .., 3) = (1, 2, 3) {}
} else {
if let (.., 1, 3) = (1, 2, 3) {}
}
if true {
if let Some(42) = None {}
} else {
if let Option::Some(42) = None {}
}
if true {
if let Some(42) = None::<u8> {}
} else {
if let Some(42) = None {}
}
if true {
if let Some(42) = None::<u8> {}
} else {
if let Some(42) = None::<u32> {}
}
if true {
if let Some(a) = Some(42) {}
} else {
if let Some(a) = Some(43) {}
}
// Same NaNs
let _ = if true {
std::f32::NAN
} else {
//~ ERROR same body as `if` block
std::f32::NAN
};
if true {
try!(Ok("foo"));
} else {
//~ ERROR same body as `if` block
try!(Ok("foo"));
}
if true {
let foo = "";
return Ok(&foo[0..]);
} else if false {
let foo = "bar";
return Ok(&foo[0..]);
} else {
let foo = "";
return Ok(&foo[0..]);
}
// False positive `if_same_then_else`: `let (x, y)` vs. `let (y, x)`; see issue #3559.
if true {
let foo = "";
let (x, y) = (1, 2);
return Ok(&foo[x..y]);
} else {
let foo = "";
let (y, x) = (1, 2);
return Ok(&foo[x..y]);
}
}
// Issue #2423. This was causing an ICE.
fn func() {
if true {
f(&[0; 62]);
f(&[0; 4]);
f(&[0; 3]);
} else {
f(&[0; 62]);
f(&[0; 6]);
f(&[0; 6]);
}
}
fn f(val: &[u8]) {}
fn main() {}