121 lines
3.3 KiB
Rust
121 lines
3.3 KiB
Rust
//@ edition:2021
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// ignore-tidy-linelength
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//@ only-x86_64
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//@ run-pass
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//@ needs-unwind Asserting on contents of error message
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#![allow(path_statements, unused_allocation)]
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#![feature(core_intrinsics, generic_assert)]
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macro_rules! test {
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(
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let mut $elem_ident:ident = $elem_expr:expr;
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[ $($assert:tt)* ] => $msg:literal
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) => {
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{
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#[allow(unused_assignments, unused_mut, unused_variables)]
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let rslt = std::panic::catch_unwind(|| {
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let mut $elem_ident = $elem_expr;
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assert!($($assert)*);
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});
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let err = rslt.unwrap_err();
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if let Some(elem) = err.downcast_ref::<String>() {
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assert_eq!(elem, &$msg);
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}
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else if let Some(elem) = err.downcast_ref::<&str>() {
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assert_eq!(elem, &$msg);
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}
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else {
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panic!("assert!( ... ) should return a string");
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}
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}
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}
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}
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macro_rules! tests {
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(
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let mut $elem_ident:ident = $elem_expr:expr;
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$(
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[ $($elem_assert:tt)* ] => $elem_msg:literal
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)+
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) => {
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$(
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test!(
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let mut $elem_ident = $elem_expr;
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[ $($elem_assert)* ] => $elem_msg
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);
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)+
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}
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}
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const FOO: Foo = Foo { bar: 1 };
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#[derive(Clone, Copy, Debug, PartialEq)]
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struct Foo {
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bar: i32
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}
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impl Foo {
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fn add(&self, a: i32, b: i32) -> i32 { a + b }
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}
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fn add(a: i32, b: i32) -> i32 { a + b }
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fn main() {
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// ***** Allowed *****
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tests!(
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let mut elem = 1i32;
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// addr of
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[ &elem == &3 ] => "Assertion failed: &elem == &3\nWith captures:\n elem = 1\n"
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// array
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[ [elem][0] == 3 ] => "Assertion failed: [elem][0] == 3\nWith captures:\n elem = 1\n"
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// binary
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[ elem + 1 == 3 ] => "Assertion failed: elem + 1 == 3\nWith captures:\n elem = 1\n"
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// call
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[ add(elem, elem) == 3 ] => "Assertion failed: add(elem, elem) == 3\nWith captures:\n elem = 1\n"
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// cast
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[ elem as i32 == 3 ] => "Assertion failed: elem as i32 == 3\nWith captures:\n elem = 1\n"
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// if
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[ if elem == 3 { true } else { false } ] => "Assertion failed: if elem == 3 { true } else { false }\nWith captures:\n elem = 1\n"
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// index
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[ [1i32, 1][elem as usize] == 3 ] => "Assertion failed: [1i32, 1][elem as usize] == 3\nWith captures:\n elem = 1\n"
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// let
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[ if let 3 = elem { true } else { false } ] => "Assertion failed: if let 3 = elem { true } else { false }\nWith captures:\n elem = 1\n"
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// match
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[ match elem { 3 => true, _ => false, } ] => "Assertion failed: match elem { 3 => true, _ => false, }\nWith captures:\n elem = 1\n"
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// method call
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[ FOO.add(elem, elem) == 3 ] => "Assertion failed: FOO.add(elem, elem) == 3\nWith captures:\n elem = 1\n"
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// paren
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[ (elem) == 3 ] => "Assertion failed: (elem) == 3\nWith captures:\n elem = 1\n"
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// range
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[ (0..elem) == (0..3) ] => "Assertion failed: (0..elem) == (0..3)\nWith captures:\n elem = 1\n"
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// repeat
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[ [elem; 1] == [3; 1] ] => "Assertion failed: [elem; 1] == [3; 1]\nWith captures:\n elem = 1\n"
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// struct
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[ Foo { bar: elem } == Foo { bar: 3 } ] => "Assertion failed: Foo { bar: elem } == Foo { bar: 3 }\nWith captures:\n elem = 1\n"
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// tuple
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[ (elem, 1) == (3, 3) ] => "Assertion failed: (elem, 1) == (3, 3)\nWith captures:\n elem = 1\n"
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// unary
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[ -elem == -3 ] => "Assertion failed: -elem == -3\nWith captures:\n elem = 1\n"
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);
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}
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