3 unstable releases
0.2.1 | Aug 3, 2020 |
---|---|
0.2.0 | Jul 25, 2020 |
0.1.0 | Mar 8, 2020 |
#1670 in Text processing
10KB
147 lines
interpol
String interpolation macros for rust
Usage
Macros provided by this crate correspond to std's formatting macros (format
,print
, println
, eprint
, eprintln
, ...).
You can use these macros just same as std's ones.
use interpol::println;
let a = 3;
let b = 4;
println!("{a} times {b} is {a * b}."); // => "3 times 4 is 12."
It is also able to specify formatting option:
let pi = 3.14;
println!("{pi:.10}"); // => "3.1400000000"
println!("{123:x}"); // => "7b"
let v = vec![1, 2, 3];
println!("{v:?}"); // => "[1, 2, 3]"
Correctly handles unicode characters:
let world = "世界";
println!("ハロー {world}"); // => "ハロー 世界"
It is able to write expressions:
println!("PI = {std::f64::consts::PI:.10}");
// => "PI = 3.1415926536"
println!("PI = { 1.0_f64.atan() * 4.0 :.10}");
// => "PI = 3.1415926536"
You can also write nested block expressions:
println!("{ { let t = 123; t * t } }"); // => "15129"
println!("{{ let t = 123; t * t }}");
// "{{" and "}}" is escaped so the result is:
// => "{ let t = 123; t * t }"
Dependencies
~1.5MB
~35K SLoC