vendor/criterion/src/macros_private.rs

   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 }