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ES2015+ (CompletionRecord, NormalCompletion), ES2018+ (Thro…
…wCompletion): add new AOs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| 'use strict'; | ||
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| var GetIntrinsic = require('get-intrinsic'); | ||
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| var $SyntaxError = GetIntrinsic('%SyntaxError%'); | ||
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| var SLOT = require('internal-slot'); | ||
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| // https://262.ecma-international.org/6.0/#sec-completion-record-specification-type | ||
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| var CompletionRecord = function CompletionRecord(type, value) { | ||
| if (!(this instanceof CompletionRecord)) { | ||
| return new CompletionRecord(type, value); | ||
| } | ||
| if (type !== 'normal' && type !== 'break' && type !== 'continue' && type !== 'return' && type !== 'throw') { | ||
| throw new $SyntaxError('Assertion failed: `type` must be one of "normal", "break", "continue", "return", or "throw"'); | ||
| } | ||
| SLOT.set(this, '[[type]]', type); | ||
| SLOT.set(this, '[[value]]', value); | ||
| // [[target]] slot? | ||
| }; | ||
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| CompletionRecord.prototype.type = function type() { | ||
| return SLOT.get(this, '[[type]]'); | ||
| }; | ||
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| CompletionRecord.prototype.value = function value() { | ||
| return SLOT.get(this, '[[value]]'); | ||
| }; | ||
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| CompletionRecord.prototype['?'] = function ReturnIfAbrupt() { | ||
| var type = SLOT.get(this, '[[type]]'); | ||
| var value = SLOT.get(this, '[[value]]'); | ||
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| if (type === 'normal') { | ||
| return value; | ||
| } | ||
| if (type === 'throw') { | ||
| throw value; | ||
| } | ||
| throw new $SyntaxError('Completion Record is not of type "normal" or "throw": other types not supported'); | ||
| }; | ||
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| CompletionRecord.prototype['!'] = function assert() { | ||
| var type = SLOT.get(this, '[[type]]'); | ||
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| if (type !== 'normal') { | ||
| throw new $SyntaxError('Assertion failed: Completion Record is not of type "normal"'); | ||
| } | ||
| return SLOT.get(this, '[[value]]'); | ||
| }; | ||
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| module.exports = CompletionRecord; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| 'use strict'; | ||
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| var CompletionRecord = require('./CompletionRecord'); | ||
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| // https://262.ecma-international.org/6.0/#sec-normalcompletion | ||
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| module.exports = function NormalCompletion(value) { | ||
| return new CompletionRecord('normal', value); | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| 'use strict'; | ||
|
|
||
| var GetIntrinsic = require('get-intrinsic'); | ||
|
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| var $SyntaxError = GetIntrinsic('%SyntaxError%'); | ||
|
|
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| var SLOT = require('internal-slot'); | ||
|
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| // https://262.ecma-international.org/7.0/#sec-completion-record-specification-type | ||
|
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| var CompletionRecord = function CompletionRecord(type, value) { | ||
| if (!(this instanceof CompletionRecord)) { | ||
| return new CompletionRecord(type, value); | ||
| } | ||
| if (type !== 'normal' && type !== 'break' && type !== 'continue' && type !== 'return' && type !== 'throw') { | ||
| throw new $SyntaxError('Assertion failed: `type` must be one of "normal", "break", "continue", "return", or "throw"'); | ||
| } | ||
| SLOT.set(this, '[[Type]]', type); | ||
| SLOT.set(this, '[[Value]]', value); | ||
| // [[Target]] slot? | ||
| }; | ||
|
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| CompletionRecord.prototype.type = function Type() { | ||
| return SLOT.get(this, '[[Type]]'); | ||
| }; | ||
|
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| CompletionRecord.prototype.value = function Value() { | ||
| return SLOT.get(this, '[[Value]]'); | ||
| }; | ||
|
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| CompletionRecord.prototype['?'] = function ReturnIfAbrupt() { | ||
| var type = SLOT.get(this, '[[Type]]'); | ||
| var value = SLOT.get(this, '[[Value]]'); | ||
|
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| if (type === 'normal') { | ||
| return value; | ||
| } | ||
| if (type === 'throw') { | ||
| throw value; | ||
| } | ||
| throw new $SyntaxError('Completion Record is not of type "normal" or "throw": other types not supported'); | ||
| }; | ||
|
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||
| CompletionRecord.prototype['!'] = function assert() { | ||
| var type = SLOT.get(this, '[[Type]]'); | ||
|
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| if (type !== 'normal') { | ||
| throw new $SyntaxError('Assertion failed: Completion Record is not of type "normal"'); | ||
| } | ||
| return SLOT.get(this, '[[Value]]'); | ||
| }; | ||
|
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| module.exports = CompletionRecord; |
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