mirror of
https://github.com/rust-lang/rust-clippy
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902c7d832b
CFG treats diverging calls as its completely own path out of the function.
While this makes sense, it should also mean that a panic should increase the cyclomatic
complexity. Instead it decreases it.
Minimal example:
```rust
if a {
b
} else {
panic!("cake");
}
d
```
creates the following graph
```dot
digraph G {
"if a" -> "b"
"if a" -> "panic!(\"cake\")"
"b" -> c
}
```
which has a CC of 1 (3 - 4 + 2). A CC of 1 means there is one path through the program.
Obviously that is wrong. There are two paths. One returning normally, and one panicking.
25 lines
438 B
Rust
25 lines
438 B
Rust
#![feature(plugin)]
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#![plugin(clippy)]
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#[allow(dead_code)]
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enum Baz {
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Baz1,
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Baz2,
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}
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struct Test {
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t: Option<usize>,
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b: Baz,
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}
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fn main() {
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use Baz::*;
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let x = Test { t: Some(0), b: Baz1 };
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match x {
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Test { t: Some(_), b: Baz1 } => unreachable!(),
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Test { t: Some(42), b: Baz2 } => unreachable!(),
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Test { t: None, .. } => unreachable!(),
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Test { .. } => unreachable!(),
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}
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}
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