Merge branch 'smithy-lang:main' into trait-code-generation

smithy-model/src/main/java/software/amazon/smithy/model/loader/IdlModelLoader.java

@@ -668,6 +668,7 @@ private void parseEnumShape(ShapeId id, SourceLocation location, AbstractShapeBu
  tokenizer.expect(IdlToken.LBRACE);
  tokenizer.next();
  tokenizer.skipWs();
+ Set<String> parsedMemberNames = new HashSet<>();
 
  while (tokenizer.getCurrentToken() != IdlToken.EOF && tokenizer.getCurrentToken() != IdlToken.RBRACE) {
  List<IdlTraitParser.Result> memberTraits = IdlTraitParser
@@ -676,6 +677,10 @@ private void parseEnumShape(ShapeId id, SourceLocation location, AbstractShapeBu
  tokenizer.expect(IdlToken.IDENTIFIER);
  String memberName = internString(tokenizer.getCurrentTokenLexeme());
 
+ if (!parsedMemberNames.add(memberName)) {
+ throw syntax(id, "Found conflicting member name, `" + memberName + "`");
+ }
+
  MemberShape.Builder memberBuilder = MemberShape.builder()
  .id(id.withMember(memberName))
  .source(memberLocation)

smithy-model/src/test/resources/software/amazon/smithy/model/loader/invalid/enums/enum-with-duplicates.smithy

@@ -0,0 +1,9 @@
+// smithy.example#Foo: Syntax error at line 8, column 5: Found conflicting member name, `BAR`
+$version: "2.0"
+
+namespace smithy.example
+
+enum Foo {
+ BAR = "bar"
+ BAR = "bar"
+}

smithy-model/src/test/resources/software/amazon/smithy/model/loader/invalid/enums/intEnum-with-duplicates.smithy

@@ -0,0 +1,9 @@
+// smithy.example#Foo: Syntax error at line 8, column 5: Found conflicting member name, `BAR`
+$version: "2.0"
+
+namespace smithy.example
+
+intEnum Foo {
+ BAR = 10
+ BAR = 10
+}