v_escape 
The simd optimized escape code
Crate v_escape provides a macro new_escape! that define a struct with
escaping functionalities. These macros are optimized using simd by default,
but this can be alter using sub-attributes.
Quick start
In order to use v_escape you will have to call one of the two macros
to create a escape struct. In this example, when using the macro
new_escape!(MyEscape, "62->bar"); a new a struct MyEscape
will be created that every time its method MyEscape::fmt is called
will replace all characters ">" with "bar".
#[macro_use]
extern crate v_escape;
new_escape!(MyEscape, "62->bar");
fn main() {
let s = "foo<bar";
let escaped = MyEscape::from(s);
print!("{}", escaped);
}To check if rust version has simd functionality. The following code
has to be added to file build.rs.
use version_check::is_min_version;
fn main() {
enable_simd_optimizations();
}
fn enable_simd_optimizations() {
if !is_min_version("1.27.0").map_or(false, |(yes, _)| yes) {
println!("cargo:rustc-cfg=v_escape_nosimd");
}
}