mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-11 22:02:55 +00:00
f743fec6b0
Clippy had a false positive for with `ifs_same_cond` when two
if-let expressions have an `option_env!` macro. The fix is similar to the
`env!` macro fix.
The following example had a clippy error:
```rust
if let Some(env1) = option_env!("ENV1") {
// ...
} else if let Some(env2) = option_env!("ENV2") {
// ...
}
```
See https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=01b85c61b56ddd900117fb247af04824
changelog: Fix [`ifs_same_cond`] false positive when using `option_env!` in if-let expressions.
82 lines
1.7 KiB
Rust
82 lines
1.7 KiB
Rust
#![warn(clippy::ifs_same_cond)]
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#![allow(
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clippy::if_same_then_else,
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clippy::comparison_chain,
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clippy::needless_if,
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clippy::needless_else
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)] // all empty blocks
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fn ifs_same_cond() {
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let a = 0;
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let b = false;
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if b {
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} else if b {
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//~^ ERROR: this `if` has the same condition as a previous `if`
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}
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if a == 1 {
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} else if a == 1 {
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//~^ ERROR: this `if` has the same condition as a previous `if`
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}
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if 2 * a == 1 {
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} else if 2 * a == 2 {
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} else if 2 * a == 1 {
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//~^ ERROR: this `if` has the same condition as a previous `if`
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} else if a == 1 {
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}
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// See #659
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if cfg!(feature = "feature1-659") {
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1
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} else if cfg!(feature = "feature2-659") {
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2
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} else {
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3
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};
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let mut v = vec![1];
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if v.pop().is_none() {
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// ok, functions
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} else if v.pop().is_none() {
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}
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if v.len() == 42 {
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// ok, functions
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} else if v.len() == 42 {
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}
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if let Some(env1) = option_env!("ENV1") {
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} else if let Some(env2) = option_env!("ENV2") {
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}
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}
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fn issue10272() {
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let a = String::from("ha");
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if a.contains("ah") {
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} else if a.contains("ah") {
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//~^ ERROR: this `if` has the same condition as a previous `if`
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// Trigger this lint
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} else if a.contains("ha") {
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} else if a == "wow" {
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}
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let p: *mut i8 = std::ptr::null_mut();
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if p.is_null() {
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} else if p.align_offset(0) == 0 {
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} else if p.is_null() {
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// ok, p is mutable pointer
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} else {
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}
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let x = std::cell::Cell::new(true);
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if x.get() {
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} else if !x.take() {
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} else if x.get() {
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// ok, x is interior mutable type
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} else {
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}
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}
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fn main() {}
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