Merge #183

183: skip values serializing r=Emilgardis a=burrbull



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

Author: bors[bot]

svd-rs/CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+- skip serializing `values` in `EnumeratedValues` if empty
 - add missing fields in `Device`, require `version`, `description`, `address_unit_bits` and `width`,
   also `schema_version` is required, but skipped during (de)serialization
 - merge `register` with `registerinfo` modules same as other `info`s

svd-rs/src/enumeratedvalues.rs

@@ -28,6 +28,10 @@ pub struct EnumeratedValues {
     pub derived_from: Option<String>,
 
     /// List of variants. The number of required items depends on the bit-width of the associated field.
+    #[cfg_attr(
+        feature = "serde",
+        serde(default, skip_serializing_if = "Vec::is_empty")
+    )]
     pub values: Vec<EnumeratedValue>,
 }