Add `op` keyword for namespace properties

packages/adl/compiler/parser.ts

@@ -109,6 +109,7 @@ export function parse(code: string) {
 
   function parseNamespaceProperty(decorators: Array<Types.DecoratorExpressionNode>): Types.NamespacePropertyNode {
     const pos = tokenPos();
+    parseExpected(Token.OpKeyword);
     const id = parseIdentifier();
     parseExpected(Token.OpenParen);
     const modelPos = tokenPos();

packages/adl/compiler/scanner.ts

@@ -49,6 +49,7 @@ export enum Token {
   ImportKeyword,
   ModelKeyword,
   NamespaceKeyword,
+  OpKeyword,
   TrueKeyword,
   FalseKeyword
 }
@@ -57,6 +58,7 @@ const keywords = new Map([
   ['import', Token.ImportKeyword],
   ['model', Token.ModelKeyword],
   ['namespace', Token.NamespaceKeyword],
+  ['op', Token.OpKeyword],
   ['true', Token.TrueKeyword],
   ['false', Token.FalseKeyword]
 ]);

packages/adl/language.grammar

@@ -25,6 +25,7 @@ Keyword :
     `import`
     `model`
     `namespace`
+    `op`
 
 Identifier :
     IdentifierName but not Keyword
@@ -223,7 +224,7 @@ NamespacePropertyList :
     NamespacePropertyList `;` NamespaceProperty
 
 NamespaceProperty :
-    DecoratorList? Identifier `(` ModelPropertyList? `)` `:` Expression
+    DecoratorList? `op` Identifier `(` ModelPropertyList? `)` `:` Expression
 
 Expression :
     UnionExpressionOrHigher

packages/adl/language.md

@@ -22,6 +22,7 @@
 &emsp;&emsp;&emsp;<a name="Keyword-0330acf5"></a>`` import ``  
 &emsp;&emsp;&emsp;<a name="Keyword-fa60d604"></a>`` model ``  
 &emsp;&emsp;&emsp;<a name="Keyword-94f12ff9"></a>`` namespace ``  
+&emsp;&emsp;&emsp;<a name="Keyword-c93383ad"></a>`` op ``  
   
 &emsp;&emsp;<a name="Identifier"></a>*Identifier* **:**  
 &emsp;&emsp;&emsp;<a name="Identifier-11758399"></a>*[IdentifierName](#IdentifierName)* **but not** *[Keyword](#Keyword)*  
@@ -209,7 +210,7 @@
 &emsp;&emsp;&emsp;<a name="NamespacePropertyList-89234f4f"></a>*[NamespacePropertyList](#NamespacePropertyList)*&emsp;`` ; ``&emsp;*[NamespaceProperty](#NamespaceProperty)*  
   
 &emsp;&emsp;<a name="NamespaceProperty"></a>*NamespaceProperty* **:**  
-&emsp;&emsp;&emsp;<a name="NamespaceProperty-6e1a4442"></a>*[DecoratorList](#DecoratorList)*<sub>opt</sub>&emsp;*[Identifier](#Identifier)*&emsp;`` ( ``&emsp;*[ModelPropertyList](#ModelPropertyList)*<sub>opt</sub>&emsp;`` ) ``&emsp;`` : ``&emsp;*[Expression](#Expression)*  
+&emsp;&emsp;&emsp;<a name="NamespaceProperty-bdb0dff6"></a>*[DecoratorList](#DecoratorList)*<sub>opt</sub>&emsp;`` op ``&emsp;*[Identifier](#Identifier)*&emsp;`` ( ``&emsp;*[ModelPropertyList](#ModelPropertyList)*<sub>opt</sub>&emsp;`` ) ``&emsp;`` : ``&emsp;*[Expression](#Expression)*  
   
 &emsp;&emsp;<a name="Expression"></a>*Expression* **:**  
 &emsp;&emsp;&emsp;<a name="Expression-3936659b"></a>*[UnionExpressionOrHigher](#UnionExpressionOrHigher)*