mirror of https://github.com/jkjoy/sunpeiwen.git
227 lines
7.4 KiB
Markdown
227 lines
7.4 KiB
Markdown
## Errors
|
|
|
|
NAN includes helpers for creating, throwing and catching Errors as much of this functionality varies across the supported versions of V8 and must be abstracted.
|
|
|
|
Note that an Error object is simply a specialized form of `v8::Value`.
|
|
|
|
Also consult the V8 Embedders Guide section on [Exceptions](https://v8.dev/docs/embed#exceptions) for more information.
|
|
|
|
- <a href="#api_nan_error"><b><code>Nan::Error()</code></b></a>
|
|
- <a href="#api_nan_range_error"><b><code>Nan::RangeError()</code></b></a>
|
|
- <a href="#api_nan_reference_error"><b><code>Nan::ReferenceError()</code></b></a>
|
|
- <a href="#api_nan_syntax_error"><b><code>Nan::SyntaxError()</code></b></a>
|
|
- <a href="#api_nan_type_error"><b><code>Nan::TypeError()</code></b></a>
|
|
- <a href="#api_nan_throw_error"><b><code>Nan::ThrowError()</code></b></a>
|
|
- <a href="#api_nan_throw_range_error"><b><code>Nan::ThrowRangeError()</code></b></a>
|
|
- <a href="#api_nan_throw_reference_error"><b><code>Nan::ThrowReferenceError()</code></b></a>
|
|
- <a href="#api_nan_throw_syntax_error"><b><code>Nan::ThrowSyntaxError()</code></b></a>
|
|
- <a href="#api_nan_throw_type_error"><b><code>Nan::ThrowTypeError()</code></b></a>
|
|
- <a href="#api_nan_fatal_exception"><b><code>Nan::FatalException()</code></b></a>
|
|
- <a href="#api_nan_errno_exception"><b><code>Nan::ErrnoException()</code></b></a>
|
|
- <a href="#api_nan_try_catch"><b><code>Nan::TryCatch</code></b></a>
|
|
|
|
|
|
<a name="api_nan_error"></a>
|
|
### Nan::Error()
|
|
|
|
Create a new Error object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
|
|
|
|
Note that an Error object is simply a specialized form of `v8::Value`.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
v8::Local<v8::Value> Nan::Error(const char *msg);
|
|
v8::Local<v8::Value> Nan::Error(v8::Local<v8::String> msg);
|
|
```
|
|
|
|
|
|
<a name="api_nan_range_error"></a>
|
|
### Nan::RangeError()
|
|
|
|
Create a new RangeError object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
|
|
|
|
Note that an RangeError object is simply a specialized form of `v8::Value`.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
v8::Local<v8::Value> Nan::RangeError(const char *msg);
|
|
v8::Local<v8::Value> Nan::RangeError(v8::Local<v8::String> msg);
|
|
```
|
|
|
|
|
|
<a name="api_nan_reference_error"></a>
|
|
### Nan::ReferenceError()
|
|
|
|
Create a new ReferenceError object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
|
|
|
|
Note that an ReferenceError object is simply a specialized form of `v8::Value`.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
v8::Local<v8::Value> Nan::ReferenceError(const char *msg);
|
|
v8::Local<v8::Value> Nan::ReferenceError(v8::Local<v8::String> msg);
|
|
```
|
|
|
|
|
|
<a name="api_nan_syntax_error"></a>
|
|
### Nan::SyntaxError()
|
|
|
|
Create a new SyntaxError object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
|
|
|
|
Note that an SyntaxError object is simply a specialized form of `v8::Value`.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
v8::Local<v8::Value> Nan::SyntaxError(const char *msg);
|
|
v8::Local<v8::Value> Nan::SyntaxError(v8::Local<v8::String> msg);
|
|
```
|
|
|
|
|
|
<a name="api_nan_type_error"></a>
|
|
### Nan::TypeError()
|
|
|
|
Create a new TypeError object using the [v8::Exception](https://v8docs.nodesource.com/node-8.16/da/d6a/classv8_1_1_exception.html) class in a way that is compatible across the supported versions of V8.
|
|
|
|
Note that an TypeError object is simply a specialized form of `v8::Value`.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
v8::Local<v8::Value> Nan::TypeError(const char *msg);
|
|
v8::Local<v8::Value> Nan::TypeError(v8::Local<v8::String> msg);
|
|
```
|
|
|
|
|
|
<a name="api_nan_throw_error"></a>
|
|
### Nan::ThrowError()
|
|
|
|
Throw an Error object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new Error object will be created.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
void Nan::ThrowError(const char *msg);
|
|
void Nan::ThrowError(v8::Local<v8::String> msg);
|
|
void Nan::ThrowError(v8::Local<v8::Value> error);
|
|
```
|
|
|
|
|
|
<a name="api_nan_throw_range_error"></a>
|
|
### Nan::ThrowRangeError()
|
|
|
|
Throw an RangeError object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new RangeError object will be created.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
void Nan::ThrowRangeError(const char *msg);
|
|
void Nan::ThrowRangeError(v8::Local<v8::String> msg);
|
|
void Nan::ThrowRangeError(v8::Local<v8::Value> error);
|
|
```
|
|
|
|
|
|
<a name="api_nan_throw_reference_error"></a>
|
|
### Nan::ThrowReferenceError()
|
|
|
|
Throw an ReferenceError object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new ReferenceError object will be created.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
void Nan::ThrowReferenceError(const char *msg);
|
|
void Nan::ThrowReferenceError(v8::Local<v8::String> msg);
|
|
void Nan::ThrowReferenceError(v8::Local<v8::Value> error);
|
|
```
|
|
|
|
|
|
<a name="api_nan_throw_syntax_error"></a>
|
|
### Nan::ThrowSyntaxError()
|
|
|
|
Throw an SyntaxError object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new SyntaxError object will be created.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
void Nan::ThrowSyntaxError(const char *msg);
|
|
void Nan::ThrowSyntaxError(v8::Local<v8::String> msg);
|
|
void Nan::ThrowSyntaxError(v8::Local<v8::Value> error);
|
|
```
|
|
|
|
|
|
<a name="api_nan_throw_type_error"></a>
|
|
### Nan::ThrowTypeError()
|
|
|
|
Throw an TypeError object (a specialized `v8::Value` as above) in the current context. If a `msg` is provided, a new TypeError object will be created.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
void Nan::ThrowTypeError(const char *msg);
|
|
void Nan::ThrowTypeError(v8::Local<v8::String> msg);
|
|
void Nan::ThrowTypeError(v8::Local<v8::Value> error);
|
|
```
|
|
|
|
<a name="api_nan_fatal_exception"></a>
|
|
### Nan::FatalException()
|
|
|
|
Replaces `node::FatalException()` which has a different API across supported versions of Node. For use with [`Nan::TryCatch`](#api_nan_try_catch).
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
void Nan::FatalException(const Nan::TryCatch& try_catch);
|
|
```
|
|
|
|
<a name="api_nan_errno_exception"></a>
|
|
### Nan::ErrnoException()
|
|
|
|
Replaces `node::ErrnoException()` which has a different API across supported versions of Node.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
v8::Local<v8::Value> Nan::ErrnoException(int errorno,
|
|
const char* syscall = NULL,
|
|
const char* message = NULL,
|
|
const char* path = NULL);
|
|
```
|
|
|
|
|
|
<a name="api_nan_try_catch"></a>
|
|
### Nan::TryCatch
|
|
|
|
A simple wrapper around [`v8::TryCatch`](https://v8docs.nodesource.com/node-8.16/d4/dc6/classv8_1_1_try_catch.html) compatible with all supported versions of V8. Can be used as a direct replacement in most cases. See also [`Nan::FatalException()`](#api_nan_fatal_exception) for an internal use compatible with `node::FatalException`.
|
|
|
|
Signature:
|
|
|
|
```c++
|
|
class Nan::TryCatch {
|
|
public:
|
|
Nan::TryCatch();
|
|
|
|
bool HasCaught() const;
|
|
|
|
bool CanContinue() const;
|
|
|
|
v8::Local<v8::Value> ReThrow();
|
|
|
|
v8::Local<v8::Value> Exception() const;
|
|
|
|
// Nan::MaybeLocal for older versions of V8
|
|
v8::MaybeLocal<v8::Value> StackTrace() const;
|
|
|
|
v8::Local<v8::Message> Message() const;
|
|
|
|
void Reset();
|
|
|
|
void SetVerbose(bool value);
|
|
|
|
void SetCaptureMessage(bool value);
|
|
};
|
|
```
|
|
|