# Module :: inspect_type
[](https://github.com/emersion/stability-badges#experimental) [](https://github.com/Wandalen/wTools/actions/workflows/ModuleInspectTypePush.yml) [](https://docs.rs/inspect_type) [](https://discord.gg/JwTG6d2b)
Diagnostic-purpose tools to inspect type of a variable and its size.
### Sample
```rust
#![ cfg_attr( feature = "nightly", feature( type_name_of_val ) ) ]
pub use inspect_type::*;
#[ cfg( feature = "nightly" ) ]
fn main()
{
inspect_type_of!( &[ 1, 2, 3 ][ .. ] );
// < sizeof( &[1, 2, 3][..] : &[i32] ) = 16
inspect_type_of!( &[ 1, 2, 3 ] );
// < sizeof( &[1, 2, 3] : &[i32; 3] ) = 8
}
#[ cfg( not( feature = "nightly" ) ) ]
fn main()
{
}
```
### To add to your project
```sh
cargo add implements
```
### Try out from the repository
```sh
git clone https://github.com/Wandalen/wTools
cd wTools
cd sample/rust/inspect_type_trivial
cargo run
```