46 lines
1.4 KiB
Markdown
46 lines
1.4 KiB
Markdown
|
# basic_json::meta
|
||
|
|
|
||
|
|
```cpp
|
||
|
|
static basic_json meta();
|
||
|
|
```
|
||
|
|
|
||
|
|
This function returns a JSON object with information about the library,
|
||
|
|
including the version number and information on the platform and compiler.
|
||
|
|
|
||
|
|
## Return value
|
||
|
|
|
||
|
|
JSON object holding version information
|
||
|
|
|
||
|
|
key | description
|
||
|
|
----------- | ---------------
|
||
|
|
`compiler` | Information on the used compiler. It is an object with the following keys: `c++` (the used C++ standard), `family` (the compiler family; possible values are `clang`, `icc`, `gcc`, `ilecpp`, `msvc`, `pgcpp`, `sunpro`, and `unknown`), and `version` (the compiler version).
|
||
|
|
`copyright` | The copyright line for the library as string.
|
||
|
|
`name` | The name of the library as string.
|
||
|
|
`platform` | The used platform as string. Possible values are `win32`, `linux`, `apple`, `unix`, and `unknown`.
|
||
|
|
`url` | The URL of the project as string.
|
||
|
|
`version` | The version of the library. It is an object with the following keys: `major`, `minor`, and `patch` as defined by [Semantic Versioning](http://semver.org), and `string` (the version string).
|
||
|
|
|
||
|
|
## Exception safety
|
||
|
|
|
||
|
|
Strong guarantee: if an exception is thrown, there are no
|
||
|
|
changes to any JSON value.
|
||
|
|
|
||
|
|
## Complexity
|
||
|
|
|
||
|
|
Constant.
|
||
|
|
|
||
|
|
## Example
|
||
|
|
|
||
|
|
The following code shows an example output of the `meta()`
|
||
|
|
function.
|
||
|
|
|
||
|
|
```cpp
|
||
|
|
--8<-- "examples/meta.cpp"
|
||
|
|
```
|
||
|
|
|
||
|
|
Output:
|
||
|
|
|
||
|
|
```json
|
||
|
|
--8<-- "examples/meta.output"
|
||
|
|
```
|