Auto merge of #42 - brandonedens:optional-header-struct-name, r=japaric

Optional header struct name

The tag headerStructName is optional. Adjust SVD to account for that.
Bump version of SVD due to incompatible changes surrounding usage of Either<>

Author: homunkulus

Cargo.toml

@@ -6,7 +6,7 @@ keywords = ["CMSIS", "SVD", "parser"]
 license = "MIT OR Apache-2.0"
 name = "svd-parser"
 repository = "https://github.com/japaric/svd"
-version = "0.5.2"
+version = "0.6.0"
 
 [dependencies]
 either = "1.1.0"

src/lib.rs

@@ -225,7 +225,7 @@ impl Interrupt {
 pub struct ClusterInfo {
     pub name: String,
     pub description: String,
-    pub header_struct_name: String,
+    pub header_struct_name: Option<String>,
     pub address_offset: u32,
     pub size: Option<u32>,
     pub access: Option<Access>,
@@ -327,7 +327,7 @@ impl ClusterInfo {
         ClusterInfo {
             name: try!(tree.get_child_text("name")),
             description: try!(tree.get_child_text("description")),
-            header_struct_name: try!(tree.get_child_text("headerStructName")),
+            header_struct_name: tree.get_child_text("headerStructName"),
             address_offset: {
                 try!(parse::u32(try!(tree.get_child("addressOffset"))))
             },