Add HeapSizeOf support.

Author: notriddle

Cargo.toml

@@ -22,10 +22,14 @@ optional = true
 [dependencies.serde_macros]
 optional = true
 
+[dependencies.heapsize]
+git = "https://github.com/servo/heapsize.git"
+optional = true
+
 [dependencies]
 encoding = "0.2"
 matches = "0.1"
 
 [features]
 serde-serialization = [ "serde", "serde_macros" ]
-
+heap_size = [ "heapsize" ]

src/lib.rs

@@ -71,6 +71,7 @@ extern crate encoding;
 #[cfg(test)] extern crate tempdir;
 #[cfg(test)] extern crate rustc_serialize;
 #[cfg(feature = "serde-serialization")] extern crate serde;
+#[cfg(feature = "heap_size")] #[macro_use] extern crate heapsize;
 
 pub use tokenizer::{Token, NumericValue, PercentageValue, SourceLocation};
 pub use rules_and_declarations::{parse_important};
@@ -83,6 +84,8 @@ pub use nth::parse_nth;
 pub use serializer::{ToCss, CssStringWriter, serialize_identifier, serialize_string};
 pub use parser::{Parser, Delimiter, Delimiters, SourcePosition};
 
+#[cfg(feature = "heap_size")] known_heap_size!(0, Color, RGBA);
+
 
 /**