Fix bug when enum matched multiple types

If an enum matched a pattern for rustified enum and constified module
enum, then rust code would fail to compile with "ambiguous associated
type" error. We fix the error by giving constified module enum "higher
precedence".

Fixes issue #1198

1 files changed, 4 insertions, 2 deletions

diff --git a/src/codegen/mod.rs b/src/codegen/mod.rs
index 1801520a..1a948c05 100644
--- a/src/codegen/mod.rs
+++ b/src/codegen/mod.rs
@@ -2461,12 +2461,14 @@ impl CodeGenerator for Enum {
             }
         };
 
+        // ModuleConsts has higher precedence before Rust in order to avoid problems with
+        // overlapping match patterns
         let variation = if self.is_bitfield(ctx, item) {
             EnumVariation::Bitfield
-        } else if self.is_rustified_enum(ctx, item) {
-            EnumVariation::Rust
         } else if self.is_constified_enum_module(ctx, item) {
             EnumVariation::ModuleConsts
+        } else if self.is_rustified_enum(ctx, item) {
+            EnumVariation::Rust
         } else {
             // We generate consts by default
             EnumVariation::Consts