1 //! Private macro used for error handling.
2 
3 /// Logs an error, ignores an `Ok` value.
4 macro_rules! log_if_err {
5     ($x:expr) => {
6         let closure = || {
7             try_else_return!($x);
8         };
9         closure();
10     };
11 }
12 
13 /// Matches a result, returning the `Ok` value in case of success,
14 /// exits the calling function otherwise.
15 /// A closure which returns the return value for the function can
16 /// be passed as second parameter.
17 macro_rules! try_else_return {
18     ($x:expr) => {
19         try_else_return!($x, || {});
20     };
21     ($x:expr, $el:expr) => {
22         match $x {
23             Ok(x) => x,
24             Err(e) => {
25                 crate::error::log_error(&e);
26                 let closure = $el;
27                 return closure();
28             }
29         }
30     };
31 }
32 
33 /// Print an error message to stdout. Format is the same as println! or format!
34 macro_rules! error {
35     ($($arg:tt)*) => (
36         println!("Criterion.rs ERROR: {}", &format!($($arg)*));
37     )
38 }
39 
40 /// Print a debug message to stdout. Format is the same as println! or format!
41 macro_rules! info {
42     ($($arg:tt)*) => (
43         if $crate::debug_enabled() {
44             println!("Criterion.rs DEBUG: {}", &format!($($arg)*));
45         }
46     )
47 }
48