Add column number to dbg output

See rust-lang/rust#114962

README.md

@@ -1,5 +1,12 @@
-# dbg_hex
-display dbg result in hexadecimal `{:#x?}` format.
+dbg_hex
+===========================
+
+[<img alt="github" src="https://img.shields.io/badge/github-wcampbell0x2a/dbg_hex-8da0cb?style=for-the-badge&labelColor=555555&logo=github" height="20">](https://github.com/wcampbell0x2a/dbg_hex)
+[<img alt="crates.io" src="https://img.shields.io/crates/v/dbg_hex.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20">](https://crates.io/crates/dbg_hex)
+[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-dbg_hex-66c2a5?style=for-the-badge&labelColor=555555&logo=docs.rs" height="20">](https://docs.rs/dbg_hex)
+[<img alt="build status" src="https://img.shields.io/github/actions/workflow/status/wcampbell0x2a/dbg_hex/main.yml?branch=master&style=for-the-badge" height="20">](https://github.com/wcampbell0x2a/dbg_hex/actions?query=branch%3Amaster)
+
+Display dbg result in hexadecimal `{:#x?}` format.
 
 # usage
 Replace `dbg!()` with `dbg_hex!()`

src/lib.rs

@@ -21,15 +21,15 @@ macro_rules! dbg_hex {
     // `$val` expression could be a block (`{ .. }`), in which case the `eprintln!`
     // will be malformed.
     () => {
-        eprintln!("[{}:{}]", file!(), line!());
+        eprintln!("[{}:{}:{}]", file!(), line!(), column!());
     };
     ($val:expr $(,)?) => {
         // Use of `match` here is intentional because it affects the lifetimes
         // of temporaries - https://stackoverflow.com/a/48732525/1063961
         match $val {
             tmp => {
-                eprintln!("[{}:{}] {} = {:#x?}",
-                    file!(), line!(), stringify!($val), &tmp);
+                eprintln!("[{}:{}:{}] {} = {:#x?}",
+                    file!(), line!(), column!(), stringify!($val), &tmp);
                 tmp
             }
         }