Merge pull request #20 from hugoduncan/expose-template-error

Make TemplateError accessible

src/lib.rs

@@ -174,7 +174,7 @@ extern crate log;
 extern crate rustc_serialize as serialize;
 extern crate regex;
 
-pub use self::template::{Template, Helper};
+pub use self::template::{Template, TemplateError, Helper};
 pub use self::registry::Registry as Handlebars;
 pub use self::render::{Renderable, RenderError, RenderContext};
 pub use self::helpers::{HelperDef};

src/template.rs

@@ -1,6 +1,7 @@
 use std::cmp::min;
 use std::ops::BitOr;
 use std::num::FromPrimitive;
+use std::error;
 use std::fmt::{self, Debug, Formatter};
 use std::collections::{BTreeMap, VecDeque};
 use std::string::ToString;
@@ -111,6 +112,18 @@ impl ToString for Helper {
 #[derive(Debug, Clone, Copy)]
 pub struct TemplateError;
 
+impl fmt::Display for TemplateError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+        write!(f, "TemplateError")
+    }
+}
+
+impl error::Error for TemplateError {
+    fn description(&self) -> &str {
+        "Template error"
+    }
+}
+
 impl Helper {
     fn parse(source: String, block: bool) -> Result<Helper, TemplateError> {
         let mut tokens = source.split(|c: char| c.is_whitespace())