93 lines
1.8 KiB
Rust
93 lines
1.8 KiB
Rust
//@aux-build:proc_macros.rs
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#![feature(let_chains)]
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#![allow(
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clippy::blocks_in_if_conditions,
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clippy::if_same_then_else,
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clippy::ifs_same_cond,
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clippy::let_unit_value,
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clippy::needless_else,
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clippy::no_effect,
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clippy::nonminimal_bool,
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clippy::short_circuit_statement,
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clippy::unnecessary_operation,
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unused
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)]
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#![warn(clippy::needless_if)]
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extern crate proc_macros;
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use proc_macros::{external, with_span};
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fn maybe_side_effect() -> bool {
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true
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}
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fn main() {
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// Lint
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if (true) {}
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// Do not remove the condition
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if maybe_side_effect() {}
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// Do not lint
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if (true) {
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} else {
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}
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if {
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return;
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} {}
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// Do not lint if `else if` is present
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if (true) {
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} else if (true) {
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}
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// Do not lint `if let` or let chains
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if let true = true {}
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if let true = true && true {}
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if true && let true = true {}
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// Can lint nested `if let`s
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if {
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if let true = true && true { true } else { false }
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} && true
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{}
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external! { if (true) {} }
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with_span! {
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span
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if (true) {}
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}
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if true {
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// comment
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}
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if true {
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#[cfg(any())]
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foo;
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}
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macro_rules! empty_expansion {
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() => {};
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}
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if true {
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empty_expansion!();
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}
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macro_rules! empty_repetition {
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($($t:tt)*) => {
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if true {
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$($t)*
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}
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}
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}
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empty_repetition!();
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// Must be placed into an expression context to not be interpreted as a block
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if { maybe_side_effect() } {}
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// Would be a block followed by `&&true` - a double reference to `true`
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if { maybe_side_effect() } && true {}
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// Don't leave trailing attributes
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#[allow(unused)]
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if true {}
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let () = if maybe_side_effect() {};
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}
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