3 releases
0.2.13 | Jul 18, 2022 |
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0.2.12 | Jul 15, 2022 |
0.2.11 | May 26, 2022 |
#2360 in Algorithms
914 downloads per month
Used in 7 crates
(via woptions_meta)
1MB
29K
SLoC
Module :: meta_tools
Collection of general purpose meta tools.
Sample :: variadic constructor of collections
Among other useful meta tools the module aggregates variadtic constructors of collections. For example macro hmap!
for constructing a hash map.
#[ cfg( feature = "collection_make" ) ]
{
use meta_tools_min::*;
let meta_map = hmap! { 3 => 13 };
let mut std_map = std::collections::HashMap::new();
std_map.insert( 3, 13 );
assert_eq!( meta_map, std_map );
}
Sample :: function-style call
Apply a macro for each element of a list.
Macro for_each
may be called either in function-style way or in map-style way.
Pass name of macro to apply to elements as the first arguments and elements after the macro name.
Use comma as delimiter.
#[ cfg( feature = "for_each" ) ]
{
use meta_tools_min::*;
for_each!( dbg, "a", "b", "c" );
// generates
dbg!( "a" );
dbg!( "b" );
dbg!( "c" );
}
To add to your project
cargo add meta_tools
Try out from the repository
git clone https://github.com/Wandalen/wTools
cd wTools
cd sample/rust/meta_tools_trivial
cargo run
Dependencies
~3MB
~73K SLoC