@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊fn main() {
// Initialize test constants in a way that cannot be determined at compile time, to ensure
// rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
// dependent conditions.
let is_true = std::env::args().len() == 1;
let is_false = ! is_true;
let mut some_string = Some(String::from("the string content"));
println!(
"The string or alt: {}"
,
some_string
.
unwrap_or_else
(
⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42||
{
let mut countdown = 0;
if is_false {
countdown = 10;
}
"alt string 1".to_owned()
}@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊
)
);
some_string = Some(String::from("the string content"));
let
a
=
⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42||
{
let mut countdown = 0;
if is_false {
countdown = 10;
}
"alt string 2".to_owned()
}@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊;
println!(
"The string or alt: {}"
,
some_string
.
unwrap_or_else
(
a
)
);
some_string = None;
println!(
"The string or alt: {}"
,
some_string
.
unwrap_or_else
(
⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42||
{
let mut countdown = 0;
if is_false {
countdown = 10;
}
"alt string 3".to_owned()
}@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊
)
);
some_string = None;
let
a
=
⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42||
{
let mut countdown = 0;
if is_false {
countdown = 10;
}
"alt string 4".to_owned()
}@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊;
println!(
"The string or alt: {}"
,
some_string
.
unwrap_or_else
(
a
)
);
let
quote_closure
=
⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42|val|
{
let mut countdown = 0;
if is_false {
countdown = 10;
}
format!("'{}'", val)
}@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊;
println!(
"Repeated, quoted string: {:?}"
,
std::iter::repeat("repeat me")
.take(5)
.map
(
quote_closure
)
.collect::<Vec<_>>()
);
let
_unused_closure
=
⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42|
mut countdown
|
{
if is_false {
countdown = 10;
}
"closure should be unused".to_owned()
}@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊;
let mut countdown = 10;
let _short_unused_closure = ⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42| _unused_arg: u8 | countdown += 1@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊;
// Macros can sometimes confuse the coverage results. Compare this next assignment, with an
// unused closure that invokes the `println!()` macro, with the closure assignment above, that
// does not use a macro. The closure above correctly shows `0` executions.
let _short_unused_closure = ⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42| _unused_arg: u8 | println!("not called")@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊;
// The closure assignment above is executed, with a line count of `1`, but the `println!()`
// could not have been called, and yet, there is no indication that it wasn't...
// ...but adding block braces gives the expected result, showing the block was not executed.
let _short_unused_closure_block = ⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42| _unused_arg: u8 | { println!("not called") }@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊;
let _shortish_unused_closure = ⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42| _unused_arg: u8 | {
println!("not called")
}@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊;
let _as_short_unused_closure = ⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42|
_unused_arg: u8
| { println!("not called") }@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊;
let _almost_as_short_unused_closure = ⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42|
_unused_arg: u8
| { println!("not called") }@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42⦊
;
}⦉@0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42