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V8ScriptEngine.InitScript.js
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V8ScriptEngine.InitScript.js
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
Object
.
defineProperty
(
this
,
'EngineInternal'
,
{
value
:
(
globalObject
=>
{
const
bind
=
value
=>
value
.
bind
(
)
;
function
construct
(
)
{
return
new
this
(
...
arguments
)
;
}
const
isHostObjectKey
=
globalObject
.
isHostObjectKey
;
delete
globalObject
.
isHostObjectKey
;
const
isHostObject
=
value
=>
!
!
value
&&
(
value
[
isHostObjectKey
]
===
true
)
;
const
savedPromise
=
Promise
;
const
savedJSON
=
JSON
;
const
checkpointSymbol
=
Symbol
(
)
;
const
toJson
=
globalObject
.
toJson
;
delete
globalObject
.
toJson
;
return
Object
.
freeze
(
{
commandHolder
:
{
}
,
getCommandResult
:
bind
(
value
=>
{
if
(
(
value
===
null
)
||
(
value
===
undefined
)
)
{
return
value
;
}
if
(
typeof
(
value
.
hasOwnProperty
)
!==
'function'
)
{
if
(
value
[
Symbol
.
toStringTag
]
===
'Module'
)
{
return
'[module]'
;
}
return
'[external]'
;
}
if
(
value
[
isHostObjectKey
]
===
true
)
{
return
value
;
}
if
(
typeof
(
value
.
toString
)
!==
'function'
)
{
return
'['
+
typeof
(
value
)
+
']'
;
}
return
value
.
toString
(
)
;
}
)
,
strictEquals
:
bind
(
(
left
,
right
)
=>
left
===
right
)
,
invokeConstructor
:
bind
(
(
constructor
,
args
)
=>
{
if
(
typeof
(
constructor
)
!==
'function'
)
{
throw
new
Error
(
'Function expected'
)
;
}
return
construct
.
apply
(
constructor
,
Array
.
from
(
args
)
)
;
}
)
,
invokeMethod
:
bind
(
(
target
,
method
,
args
)
=>
{
if
(
typeof
(
method
)
!==
'function'
)
{
throw
new
Error
(
'Function expected'
)
;
}
return
method
.
apply
(
target
,
Array
.
from
(
args
)
)
;
}
)
,
createPromise
:
bind
(
function
(
)
{
return
new
savedPromise
(
...
arguments
)
;
}
)
,
isPromise
:
bind
(
value
=>
value
instanceof
savedPromise
)
,
isHostObject
:
bind
(
isHostObject
)
,
completePromiseWithResult
:
bind
(
(
getResult
,
resolve
,
reject
)
=>
{
try
{
resolve
(
getResult
(
)
)
;
}
catch
(
exception
)
{
reject
(
exception
)
;
}
return
undefined
;
}
)
,
completePromise
:
bind
(
(
wait
,
resolve
,
reject
)
=>
{
try
{
wait
(
)
;
resolve
(
)
;
}
catch
(
exception
)
{
reject
(
exception
)
;
}
return
undefined
;
}
)
,
throwValue
:
bind
(
value
=>
{
throw
value
;
}
)
,
getStackTrace
:
bind
(
(
)
=>
{
try
{
throw
new
Error
(
'[stack trace]'
)
;
}
catch
(
exception
)
{
return
exception
.
stack
;
}
}
)
,
toIterator
:
bind
(
function
*
(
enumerator
)
{
try
{
while
(
enumerator
.
ScriptableMoveNext
(
)
)
{
yield
enumerator
.
ScriptableCurrent
;
}
}
finally
{
enumerator
.
ScriptableDispose
(
)
;
}
}
)
,
toAsyncIterator
:
bind
(
async
function
*
(
asyncEnumerator
)
{
try
{
while
(
await
asyncEnumerator
.
ScriptableMoveNextAsync
(
)
)
{
yield
asyncEnumerator
.
ScriptableCurrent
;
}
}
finally
{
await
asyncEnumerator
.
ScriptableDisposeAsync
(
)
;
}
}
)
,
getIterator
:
bind
(
obj
=>
obj
?.
[
Symbol
.
iterator
]
?.
(
)
)
,
getAsyncIterator
:
bind
(
obj
=>
obj
?.
[
Symbol
.
asyncIterator
]
?.
(
)
)
,
checkpoint
:
bind
(
(
)
=>
{
const
value
=
globalObject
[
checkpointSymbol
]
;
if
(
value
)
{
throw
value
;
}
}
)
,
toJson
:
bind
(
(
key
,
value
)
=>
toJson
?
savedJSON
.
parse
(
toJson
(
key
,
value
)
)
:
value
)
,
parseJson
:
bind
(
json
=>
savedJSON
.
parse
(
json
)
)
,
asyncGenerator
:
(
async
function
*
(
)
{
}
)
(
)
.
constructor
}
)
;
}
)
(
this
)
}
)
;
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