Merge #95

95: v0.8.1 r=therealprof a=burrbull

r? @therealprof 

Also I've found and fixed bug in #69 

Co-authored-by: Andrey Zgarbul <zgarbul.andrey@gmail.com>

Author: bors[bot]

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [v0.8.1] - 2019-11-03
+
+- Fix: make `derive_from` module public
+- Fix: enumerated_values empty check
+
 ## [v0.8.0] - 2019-11-03
 
 - [breaking-change]  `RegisterClusterArrayInfo` renamed on `DimElement`
@@ -106,7 +111,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Initial SVD parser
 - A `parse` utility function to parse the contents of a SVD file (XML)
 
-[Unreleased]: https://github.com/rust-embedded/svd/compare/v0.8.0...HEAD
+[Unreleased]: https://github.com/rust-embedded/svd/compare/v0.8.1...HEAD
+[v0.8.1]: https://github.com/rust-embedded/svd/compare/v0.8.0...v0.8.1
 [v0.8.0]: https://github.com/rust-embedded/svd/compare/v0.7.0...v0.8.0
 [v0.7.0]: https://github.com/rust-embedded/svd/compare/v0.6.0...v0.7.0
 [v0.6.0]: https://github.com/rust-embedded/svd/compare/v0.5.2...v0.6.0

src/lib.rs

@@ -49,7 +49,7 @@ use encode::Encode;
 pub mod types;
 
 #[cfg(feature = "derive-from")]
-mod derive_from;
+pub mod derive_from;
 #[cfg(feature = "derive-from")]
 pub use derive_from::DeriveFrom;
 

src/svd/enumeratedvalues.rs

@@ -31,11 +31,13 @@ impl Parse for EnumeratedValues {
 
     fn parse(tree: &Element) -> Result<EnumeratedValues, SVDError> {
         assert_eq!(tree.name, "enumeratedValues");
+        let derived_from = tree.attributes.get("derivedFrom").map(|s| s.to_owned());
+        let is_derived = derived_from.is_some();
 
         Ok(EnumeratedValues {
             name: tree.get_child_text_opt("name")?,
             usage: parse::optional::<Usage>("usage", tree)?,
-            derived_from: tree.attributes.get("derivedFrom").map(|s| s.to_owned()),
+            derived_from,
             values: {
                 let values: Result<Vec<_>, _> = tree
                     .children
@@ -62,7 +64,7 @@ impl Parse for EnumeratedValues {
                     })
                     .collect();
                 let values = values?;
-                if values.is_empty() {
+                if values.is_empty() && !is_derived {
                     return Err(SVDErrorKind::EmptyTag(tree.clone(), tree.name.clone()).into());
                 }
                 values