Merge pull request #2 from nox/heapsize

Support heapsize

Author: pyfisch

Cargo.toml

@@ -9,3 +9,14 @@ license = "MIT"
 repository = "https://github.com/pyfisch/rust-language-tags"
 documentation = "http://pyfisch.github.io/rust-language-tags/language_tags/"
 keywords = ["language", "internationalization", "translation", "http", "html"]
+
+[dependencies.heapsize]
+version = "0.2.2"
+optional = true
+
+[dependencies.heapsize_plugin]
+version = "0.1.2"
+optional = true
+
+[features]
+heap_size = ["heapsize", "heapsize_plugin"]

src/lib.rs

@@ -1,5 +1,7 @@
 #![deny(missing_docs)]
 #![cfg_attr(test, deny(warnings))]
+#![cfg_attr(feature = "heap_size", feature(custom_derive, plugin))]
+#![cfg_attr(feature = "heap_size", plugin(heapsize_plugin))]
 
 //! Language tags can be used identify human languages, scripts e.g. Latin script, countries and
 //! other regions.
@@ -47,6 +49,9 @@
 //!
 //! There is also the `langtag!` macro for creating language tags.
 
+#[cfg(feature = "heap_size")]
+extern crate heapsize;
+
 use std::ascii::AsciiExt;
 use std::cmp::Ordering;
 use std::collections::{BTreeMap, BTreeSet};
@@ -212,6 +217,7 @@ const DEPRECATED_REGION: [(&'static str, &'static str); 6] = [("BU", "MM"),
 /// but excludes languages not intended primarily for human
 /// communication, such as programming languages.
 #[derive(Debug, Default, Eq, Clone)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct LanguageTag {
     /// Language subtags are used to indicate the language, ignoring all
     /// other aspects such as script, region or spefic invariants.