37 lines
1.2 KiB
Markdown
37 lines
1.2 KiB
Markdown
# Example: C++ exception handling
|
|
|
|
(See the README.md file in the upper level 'examples' directory for more information about examples.)
|
|
|
|
This example demonstrates usage of C++ exceptions in ESP-IDF.
|
|
|
|
By default, C++ exceptions support is disabled in ESP-IDF. It can be enabled using `CONFIG_COMPILER_CXX_EXCEPTIONS` configuration option.
|
|
|
|
In this example, `sdkconfig.defaults` file sets `CONFIG_COMPILER_CXX_EXCEPTIONS` option. This enables both compile time support (`-fexceptions` compiler flag) and run-time support for C++ exception handling.
|
|
|
|
Example source code declares a class which can throw exception from the constructor, depending on the argument. It illustrates that exceptions can be thrown and caught using standard C++ facilities.
|
|
|
|
## How to use example
|
|
|
|
### Build and Flash
|
|
|
|
```
|
|
idf.py -p PORT flash monitor
|
|
```
|
|
|
|
(Replace PORT with the name of the serial port.)
|
|
|
|
(To exit the serial monitor, type ``Ctrl-]``.)
|
|
|
|
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
|
|
|
|
## Example Output
|
|
|
|
```
|
|
app_main starting
|
|
In constructor, arg=42
|
|
In constructor, arg=0
|
|
In destructor, m_arg=42
|
|
Exception caught: Exception in constructor
|
|
app_main done
|
|
```
|
|
|