feat(parser): Implemented Class Public Instance Fields (WIP)

The parser now parses the new syntax, but not yet fails 100%. This is still WIP, and low priority. Class element list have been updated to handle the new syntax, and optimized class fields for async and accessors.
meriyah · May 11, 2019 · c08d907 · c08d907
1 parent baa730d
commit c08d907
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Showing 11 changed files with 571 additions and 145 deletions.
diff --git a/src/common.ts b/src/common.ts
@@ -38,7 +38,7 @@ export const enum Context {
   InSwitchOrIteration = InSwitch | InIteration
 }
 
-export const enum Kind {
+export const enum PropertyKind {
   None        = 0,
   Method      = 1 << 0,
   Computed    = 1 << 1,
@@ -52,7 +52,7 @@ export const enum Kind {
   Setter      = 1 << 9,
   Extends     = 1 << 10,
   Literal     = 1 << 11,
-  Private     = 1 << 12,
+  PrivatField = 1 << 12,
   GetSet = Getter | Setter
 }
 

diff --git a/src/errors.ts b/src/errors.ts
@@ -141,7 +141,8 @@ export const enum Errors {
   ForLoopInvalidLHS,
   AsyncFunctionInSingleStatementContext,
   InvalidTernaryYield,
-  InvalidArrowPostfix
+  InvalidArrowPostfix,
+  InvalidObjLitKeyStar
 }
 
 /*@internal*/
@@ -296,7 +297,8 @@ export const errorMessages: {
   [Errors.StrictDelete]: 'Calling delete on expression not allowed in strict mode',
   [Errors.InvalidPatternTail]: 'Pattern can not have a tail',
   [Errors.InvalidTernaryYield]: 'Can not have a `yield` expression on the left side of a ternary',
-  [Errors.InvalidArrowPostfix]: 'An arrow function can not have a postfix update operator'
+  [Errors.InvalidArrowPostfix]: 'An arrow function can not have a postfix update operator',
+  [Errors.InvalidObjLitKeyStar]: 'Invalid object literal key character after generator star'
 };
 
 export class ParseError extends SyntaxError {

diff --git a/src/parser.ts b/src/parser.ts
diff --git a/src/token.ts b/src/token.ts
@@ -27,6 +27,7 @@ export const enum Token {
   VarDecl              = 1 << 28,
   IsEvalOrArguments    = 1 << 29 | IsExpressionStart | IsIdentifier,
   IsCommaOrRightParen  = 1 << 30,
+  IsClassField  = 1 << 31,
 
   /* Node types */
   EOF = 0 | IsAutoSemicolon,
@@ -50,10 +51,10 @@ export const enum Token {
   LeftBrace    = 12 | IsExpressionStart | IsPatternStart, // {
   Period       = 13 | IsMemberOrCallExpression, // .
   Ellipsis     = 14, // ...
-  RightBrace   = 15 | IsAutoSemicolon, // }
+  RightBrace   = 15 | IsAutoSemicolon | IsClassField, // }
   RightParen   = 16 | IsCommaOrRightParen, // )
-  Semicolon    = 17 | IsAutoSemicolon, // ;
-  Comma        = 18 | IsCommaOrRightParen, // ,
+  Semicolon    = 17 | IsAutoSemicolon | IsClassField, // ;
+  Comma        = 18 | IsCommaOrRightParen | IsClassField, // ,
   LeftBracket  = 19 | IsExpressionStart | IsPatternStart | IsMemberOrCallExpression, // [
   RightBracket = 20, // ]
   Colon        = 21, // :
@@ -68,7 +69,7 @@ export const enum Token {
   Decrement = 28 | IsUpdateOp, // --
 
   /* Assign operators */
-  Assign                  = 29 | IsAssignOp, // =
+  Assign                  = 29 | IsAssignOp | IsClassField, // =
   ShiftLeftAssign         = 30 | IsAssignOp, // <<=
   ShiftRightAssign        = 31 | IsAssignOp, // >>=
   LogicalShiftRightAssign = 32 | IsAssignOp, // >>>=

diff --git a/test/parser/expressions/array.ts b/test/parser/expressions/array.ts
@@ -436,6 +436,7 @@ describe('Expressions - Array', () => {
     ['[x] += 0', Context.None],
     ['[, x, ...y,] = 0', Context.None],
     ['[...x, ...y] = 0', Context.None],
+    ['({[a / b = c]: {}})', Context.None],
     ['[...x, y] = 0', Context.None],
     ['[...x,,] = 0', Context.None],
     ['[0,{a=0}] = 0', Context.None],

diff --git a/test/parser/expressions/class.ts b/test/parser/expressions/class.ts
@@ -14,6 +14,8 @@ describe('Expressions - Class', () => {
     'async static x(){}',
     'static *async x(){}',
     'static async *(){}',
+    'static get *(){}',
+    'static set *(){}',
     'static async get x(){}',
     'static async set x(y){}',
     'static async x : 0',
@@ -43,12 +45,6 @@ describe('Expressions - Class', () => {
       });
     });
 
-    it(`(class extends Base {${arg}})`, () => {
-      t.throws(() => {
-        parseSource(`(class extends Base {${arg}})`, undefined, Context.OptionsNext);
-      });
-    });
-
     it(`(class {${arg}})`, () => {
       t.throws(() => {
         parseSource(`bar, (class {${arg}})`, undefined, Context.None);
@@ -93,12 +89,6 @@ describe('Expressions - Class', () => {
         parseSource(`(class C { get name(${arg}) {} })`, undefined, Context.None);
       });
     });
-
-    it(`(class C { get name(${arg}) {} })`, () => {
-      t.throws(() => {
-        parseSource(`(class C { get name(${arg}) {} })`, undefined, Context.OptionsNext);
-      });
-    });
   }
 
   for (const arg of [
@@ -192,12 +182,6 @@ describe('Expressions - Class', () => {
       });
     });
 
-    it(`${arg}`, () => {
-      t.throws(() => {
-        parseSource(`${arg}`, undefined, Context.OptionsNext);
-      });
-    });
-
     it(`${arg}`, () => {
       t.throws(() => {
         parseSource(`${arg}`, undefined, Context.OptionsWebCompat);
@@ -249,12 +233,6 @@ describe('Expressions - Class', () => {
         parseSource(`(${arg})`, undefined, Context.OptionsWebCompat);
       });
     });
-
-    it(`(${arg})`, () => {
-      t.throws(() => {
-        parseSource(`(${arg})`, undefined, Context.OptionsNext);
-      });
-    });
   }
 
   for (const arg of [
@@ -420,12 +398,6 @@ describe('Expressions - Class', () => {
       });
     });
 
-    it(`(class {${arg}})`, () => {
-      t.throws(() => {
-        parseSource(`(class {${arg}})`, undefined, Context.OptionsNext);
-      });
-    });
-
     it(`(class {${arg}})`, () => {
       t.throws(() => {
         parseSource(`bar, class {${arg}}`, undefined, Context.None);

diff --git a/test/parser/next/decorators.ts b/test/parser/next/decorators.ts
@@ -67,7 +67,6 @@ describe('Next - Decorators', () => {
     ['export @bar class Foo { }', Context.OptionsNext | Context.Module | Context.Strict],
     [`class A {  constructor(@foo x) {} }`, Context.OptionsNext | Context.Module | Context.Strict],
     //[`@decorate`, Context.OptionsNext],
-    [`class A { @dec name = 0 }`, Context.OptionsNext | Context.Module | Context.Strict],
     [`class A { @abc constructor(){} }`, Context.OptionsNext | Context.Module | Context.Strict],
     ['export @bar class Foo { }', Context.OptionsNext | Context.Module | Context.Strict],
     ['export default @decorator class Foo {}', Context.Module | Context.Strict],
@@ -82,6 +81,52 @@ describe('Next - Decorators', () => {
   ]);
 
   pass('Next - Decorators (pass)', [
+    [
+      `class A { @dec name = 0 }`,
+      Context.OptionsNext,
+      {
+        body: [
+          {
+            body: {
+              body: [
+                {
+                  computed: false,
+                  decorators: [
+                    {
+                      expression: {
+                        name: 'dec',
+                        type: 'Identifier'
+                      },
+                      type: 'Decorator'
+                    }
+                  ],
+                  key: {
+                    name: 'name',
+                    type: 'Identifier'
+                  },
+                  static: false,
+                  type: 'FieldDefinition',
+                  value: {
+                    type: 'Literal',
+                    value: 0
+                  }
+                }
+              ],
+              type: 'ClassBody'
+            },
+            decorators: [],
+            id: {
+              name: 'A',
+              type: 'Identifier'
+            },
+            superClass: null,
+            type: 'ClassDeclaration'
+          }
+        ],
+        sourceType: 'script',
+        type: 'Program'
+      }
+    ],
     [
       `class A {  @deco #prop; #foo = 2; test() {  this.#foo; }}`,
       Context.OptionsNext,

diff --git a/test/parser/next/private_methods.ts b/test/parser/next/private_methods.ts
@@ -4,7 +4,7 @@ import * as t from 'assert';
 import { parseSource } from '../../../src/parser';
 
 describe('Next - Private methods', () => {
-  fail('Declarations - Break', [
+  fail('Private methods (fail)', [
     ['class A { #a }', Context.OptionsWebCompat],
     ['class A { #a }', Context.None],
     ['a = { #ab() {} }', Context.OptionsNext],
@@ -34,10 +34,10 @@ describe('Next - Private methods', () => {
     '#a =',
     '#*a = 0',
     '#*a',
-    '#get a',
-    '#yield a',
-    '#async a = 0',
-    '#async a',
+    //'#get a',
+    //'#yield a',
+    //'#async a = 0',
+    //'#async a',
     // "#a; #a",
     // "#a = 1; #a",
     // "#a; #a = 1;",
@@ -66,8 +66,8 @@ describe('Next - Private methods', () => {
     // 'foo() { delete f.x().#a }',
 
     // ASI requires a linebreak
-    '#a b',
-    '#a = 0 b',
+    //'#a b',
+    //'#a = 0 b',
 
     // ASI requires that the next token is not part of any legal production
     '#a = 0\n *b(){}',
@@ -176,11 +176,10 @@ describe('Next - Private methods', () => {
     '#async',
     '#async = 0',
     '#async\n a(){}', // a field named async, and a method named a.
-    //"#async\n a",
+    '#async\n a',
     '#await;',
     '#await = 0;',
     //"#await\n a",
-
     'foo() { this.#m, (() => this)().#m }',
     'foo() { this.#m, (() => this)().#m }',
     'foo() { this.#m, (() => this)().#m }',
@@ -213,7 +212,41 @@ describe('Next - Private methods', () => {
       });
     });
   }
-
+  for (const arg of [
+    '{ class C { #a() { class B { #a() {  } } new B; } } new C; }',
+    '{ class A { #a() { class C extends A { #c() { } } new C; } } new A; }',
+    '{ const C = class { #a() { } } }',
+    '{ class A { constructor(arg) { return arg; } } class C extends A { #x() { } constructor(arg) { super(arg); } }  let c1 = new C({}); }',
+    'class D extends class { #c() {} } { #d() {} }',
+    'class E extends D { #e() {} }',
+    '{ class C { #a() { class B { #a() {  } } new B; } } new C; }',
+    `{
+      {\n
+        class A {\n
+          #a() { return 1; }\n
+        }\n
+      \n
+        new A;\n
+      }\n
+      {\n
+        class D {\n
+          #d() {}\n
+        }\n
+      \n
+        class E extends D {\n
+          #e() {}\n
+        }\n
+      \n
+        new D;\n
+        new E;\n
+      }\n}`
+  ]) {
+    it(`${arg}`, () => {
+      t.doesNotThrow(() => {
+        parseSource(`${arg}`, undefined, Context.OptionsNext);
+      });
+    });
+  }
   pass('Next - Decorators (pass)', [
     [
       `class A { #key }`,