Make DOMString a newtype around String, rather than a typedef.

This should make it somewhat easier to experiment with alternative
representations in the future. To reduce churn, this commit leaves the String
field public, though.

Also, this will allow us to use the default String type to represent the IDL
USVString type, which explicitly forbids unpaired surrogates, ans as such is
a better match to the Rust String type.

1 files changed, 4 insertions, 4 deletions

diff --git a/components/script/dom/domexception.rs b/components/script/dom/domexception.rs
index 8bc3497f5c9..70b96e89325 100644
--- a/components/script/dom/domexception.rs
+++ b/components/script/dom/domexception.rs
@@ -70,7 +70,7 @@ impl DOMExceptionMethods for DOMException {
 
     // https://heycam.github.io/webidl/#idl-DOMException-error-names
     fn Name(&self) -> DOMString {
-        format!("{:?}", self.code)
+        DOMString(format!("{:?}", self.code))
     }
 
     // https://heycam.github.io/webidl/#error-names
@@ -102,11 +102,11 @@ impl DOMExceptionMethods for DOMException {
             DOMErrorName::EncodingError => "The encoding operation (either encoded or decoding) failed."
         };
 
-        message.to_owned()
+        DOMString(message.to_owned())
     }
 
     // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-error.prototype.tostring
-    fn Stringifier(&self) -> String {
-        format!("{}: {}", self.Name(), self.Message())
+    fn Stringifier(&self) -> DOMString {
+        DOMString(format!("{}: {}", self.Name(), self.Message()))
     }
 }