More missing pieces

Author: benjie

src/language/__tests__/predicates-test.ts

@@ -92,6 +92,7 @@ describe('AST node predicates', () => {
       'NamedType',
       'ListType',
       'NonNullType',
+      'SemanticNonNullType',
     ]);
   });
 

src/language/ast.ts

@@ -236,6 +236,7 @@ export const QueryDocumentKeys: {
   NamedType: ['name'],
   ListType: ['type'],
   NonNullType: ['type'],
+  SemanticNonNullType: ['type'],
 
   SchemaDefinition: ['description', 'directives', 'operationTypes'],
   OperationTypeDefinition: ['type'],

src/language/printer.ts

@@ -131,6 +131,7 @@ const printDocASTReducer: ASTReducer<string> = {
   NamedType: { leave: ({ name }) => name },
   ListType: { leave: ({ type }) => '[' + type + ']' },
   NonNullType: { leave: ({ type }) => type + '!' },
+  SemanticNonNullType: { leave: ({ type }) => type + '*' },
 
   // Type System Definitions