proposal-enum/enum.grammar at main · tc39/proposal-enum · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
// A.2 - Expressions

EnumExpression[Yield, Await] :
  DecoratorList[?Yield, ?Await]? `enum` BindingIdentifier[?Yield, ?Await]? EnumTail[?Yield, ?Await]

PrimaryExpression[Yield, Await] :
  <ins>EnumExpression[?Yield, ?Await]</ins>


// A.3 - Statements

EnumDeclaration[Yield, Await, Default, Decorators] :
  `enum` BindingIdentifier[?Yield, ?Await] EnumTail[?Yield, ?Await]
  [+Default] `enum` EnumTail[?Yield, ?Await]
  [+Decorators] DecoratorList[?Yield, ?Await] `enum` BindingIdentifier[?Yield, ?Await] EnumTail[?Yield, ?Await]

EnumTail[Yield, Await] :
  EnumOfClause[?Yield, ?Await]? `{` EnumBody[?Yield, ?Await] `}`

EnumOfClause[Yield, Await] :
  `of` LeftHandSideExpression[?Yield, ?Await]

EnumBody[Yield, Await] :
  EnumElementList[?Yield, ?Await]
  EnumElementList[?Yield, ?Await] `,`

EnumElementList[Yield, Await] :
  EnumElement[?Yield, ?Await]
  EnumElementList[?Yield, ?Await] `,` EnumElement[?Yield, ?Await]

EnumElement[Yield, Await] :
  DecoratorList[?Yield, ?Await]? PropertyName[?Yield, ?Await] Initializer[+In, ?Yield, ?Await]?

Declaration[Yield, Await, Decorators] :
  <ins>EnumDeclaration[?Yield, ?Await, ?Decorators]</ins>


// A.5 - Scripts and Modules

ExportDeclaration :
  <ins>DecoratorList[~Yield, ~Await] `export` EnumDeclaration[~Yield, ~Await, +Default, ~Decorators]</ins>
  <ins>DecoratorList[~Yield, ~Await]? `export` `default` EnumDeclaration[~Yield, ~Await, +Default, ~Decorators]</ins>
  `export` `default` [lookahead ∉ { `function`, `async` [no LineTerminator here] `function`, `class`, `@`, <ins>`enum`</ins> }] AssignmentExpression[+In, ~Yield, ~Await] `;`