fix(apollo-parser): add repeatable kw support in ungrammar (#189)

crates/apollo-parser/src/ast/generated/nodes.rs

@@ -60,6 +60,9 @@ impl DirectiveDefinition {
     pub fn arguments_definition(&self) -> Option<ArgumentsDefinition> {
         support::child(&self.syntax)
     }
+    pub fn repeatable_token(&self) -> Option<SyntaxToken> {
+        support::token(&self.syntax, S![repeatable])
+    }
     pub fn on_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, S![on]) }
     pub fn directive_locations(&self) -> Option<DirectiveLocations> { support::child(&self.syntax) }
 }

crates/apollo-parser/src/parser/grammar/directive.rs

@@ -183,3 +183,33 @@ pub(crate) fn directives(p: &mut Parser) {
         directive(p);
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::ast;
+
+    use super::*;
+
+    #[test]
+    fn it_can_access_repeatable_kw_on_directive_definition() {
+        let schema = r#"
+directive @example(isTreat: Boolean, treatKind: String) repeatable on FIELD | MUTATION
+        "#;
+        let parser = Parser::new(schema);
+        let ast = parser.parse();
+
+        assert!(ast.errors.is_empty());
+
+        let document = ast.document();
+        for definition in document.definitions() {
+            if let ast::Definition::DirectiveDefinition(dir_def) = definition {
+                assert_eq!(
+                    dir_def.repeatable_token().unwrap().kind(),
+                    SyntaxKind::repeatable_KW
+                );
+                return;
+            }
+        }
+        panic!("Expected AST to have a Directive Definition");
+    }
+}

graphql.ungram

@@ -256,7 +256,7 @@ InputObjectTypeExtension =
   | 'extend' 'input' Name Directives?
 
 DirectiveDefinition =
-  Description? 'directive' '@' Name ArgumentsDefinition? 'on' DirectiveLocations
+  Description? 'directive' '@' Name ArgumentsDefinition? 'repeatable'? 'on' DirectiveLocations
 
 // In the spec, DirectiveLocations is defined as an enum of:
 // DirectiveLocations