1 // Licensed to the Apache Software Foundation (ASF) under one
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5 // to you under the Apache License, Version 2.0 (the
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9 //   http://www.apache.org/licenses/LICENSE-2.0
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14 // KIND, either express or implied.  See the License for the
15 // specific language governing permissions and limitations
16 // under the License.
17 
18 /// Macro for printing to the trace output, without a newline.
19 ///
20 /// Equivalent to the `trace_println!` macro expect that a newline is not
21 /// printed at the end of the message.
22 ///
23 /// # Examples
24 ///
25 /// ``` no_run
26 /// trace_print!("this ")
27 /// trace_print!("will ")
28 /// trace_print!("be ")
29 /// trace_print!("on ")
30 /// trace_print!("the ")
31 /// trace_print!("same ")
32 /// trace_print!("line ")
33 /// print!("this string has a newline, why not choose println! instead?\n");
34 /// ```
35 #[macro_export]
36 macro_rules! trace_print {
37     ($($arg:tt)*) => ($crate::trace::Trace::_print(format_args!($($arg)*)));
38 }
39 
40 /// Macro for printing to the trace output, with a newline.
41 /// Use the `format!` syntax to write data to the standard output. See
42 /// `std::fmt` for more information.
43 ///
44 /// # Examples
45 ///
46 /// ``` no_run
47 /// trace_println!("Hello, World!");
48 /// trace_println!("format {} arguments", "some");
49 /// ```
50 #[macro_export]
51 macro_rules! trace_println {
52     () => {
53         $crate::trace::Trace::_print(format_args!("\n"));
54     };
55     ($s:expr) => {
56         $crate::trace::Trace::_print(format_args!(concat!($s, "\n")));
57     };
58     ($s:expr, $($tt:tt)*) => {
59         $crate::trace::Trace::_print(format_args!(concat!($s, "\n"), $($tt)*));
60     };
61 }
62