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96 lines
3.6 KiB
Rust
96 lines
3.6 KiB
Rust
//! The non_fmt_panics lint detects panic!(..) invocations where
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//! the first argument is not a formatting string.
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//!
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//! Also, this test checks that this is not emitted if it originates
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//! in an external macro.
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//@ run-rustfix
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//@ rustfix-only-machine-applicable
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//@ build-pass (FIXME(62277): should be check-pass)
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//@ aux-build:fancy-panic.rs
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extern crate fancy_panic;
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const C: &str = "abc {}";
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static S: &str = "{bla}";
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#[allow(unreachable_code)]
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fn main() {
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panic!("here's a brace: {"); //~ WARN panic message contains a brace
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unreachable!("here's a brace: {"); //~ WARN panic message contains a brace
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std::panic!("another one: }"); //~ WARN panic message contains a brace
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core::panic!("Hello {}"); //~ WARN panic message contains an unused formatting placeholder
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assert!(false, "{:03x} {test} bla");
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//~^ WARN panic message contains unused formatting placeholders
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assert!(false, S);
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//~^ WARN panic message is not a string literal
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assert!(false, 123);
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//~^ WARN panic message is not a string literal
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assert!(false, Some(123));
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//~^ WARN panic message is not a string literal
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debug_assert!(false, "{{}} bla"); //~ WARN panic message contains braces
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panic!(C); //~ WARN panic message is not a string literal
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panic!(S); //~ WARN panic message is not a string literal
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unreachable!(S); //~ WARN panic message is not a string literal
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unreachable!(S); //~ WARN panic message is not a string literal
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std::panic!(123); //~ WARN panic message is not a string literal
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core::panic!(&*"abc"); //~ WARN panic message is not a string literal
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panic!(Some(123)); //~ WARN panic message is not a string literal
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panic!(concat!("{", "}")); //~ WARN panic message contains an unused formatting placeholder
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panic!(concat!("{", "{")); //~ WARN panic message contains braces
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fancy_panic::fancy_panic!("test {} 123");
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//~^ WARN panic message contains an unused formatting placeholder
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fancy_panic::fancy_panic!(); // OK
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fancy_panic::fancy_panic!(S); // OK
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macro_rules! a {
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() => { 123 };
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}
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panic!(a!()); //~ WARN panic message is not a string literal
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unreachable!(a!()); //~ WARN panic message is not a string literal
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panic!(format!("{}", 1)); //~ WARN panic message is not a string literal
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unreachable!(format!("{}", 1)); //~ WARN panic message is not a string literal
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assert!(false, format!("{}", 1)); //~ WARN panic message is not a string literal
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debug_assert!(false, format!("{}", 1)); //~ WARN panic message is not a string literal
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panic![123]; //~ WARN panic message is not a string literal
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panic!{123}; //~ WARN panic message is not a string literal
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// Check that the lint only triggers for std::panic and core::panic,
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// not any panic macro:
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macro_rules! panic {
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($e:expr) => ();
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}
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panic!("{}"); // OK
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panic!(S); // OK
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a(1);
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b(1);
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c(1);
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d(1);
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}
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fn a<T: Send + 'static>(v: T) {
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panic!(v); //~ WARN panic message is not a string literal
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assert!(false, v); //~ WARN panic message is not a string literal
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}
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fn b<T: std::fmt::Debug + Send + 'static>(v: T) {
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panic!(v); //~ WARN panic message is not a string literal
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assert!(false, v); //~ WARN panic message is not a string literal
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}
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fn c<T: std::fmt::Display + Send + 'static>(v: T) {
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panic!(v); //~ WARN panic message is not a string literal
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assert!(false, v); //~ WARN panic message is not a string literal
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}
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fn d<T: std::fmt::Display + std::fmt::Debug + Send + 'static>(v: T) {
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panic!(v); //~ WARN panic message is not a string literal
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assert!(false, v); //~ WARN panic message is not a string literal
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}
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