42 lines
1.3 KiB
Markdown
42 lines
1.3 KiB
Markdown
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# Example: C++ exception handling
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(See the README.md file in the upper level 'examples' directory for more information about examples.)
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This example demonstrates usage of C++ exceptions in ESP-IDF.
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By default, C++ exceptions support is disabled in ESP-IDF. It can be enabled using `CONFIG_CXX_EXCEPTIONS` configuration option.
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In this example, `sdkconfig.defaults` file sets `CONFIG_CXX_EXCEPTIONS` option. This enables both compile time support (`-fexceptions` compiler flag) and run-time support for C++ exception handling.
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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.
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## How to use example
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### Configure the project
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Run `make menuconfig` and set serial port under Serial Flasher Options.
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### Build and Flash
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Build the project and flash it to the board, then run monitor tool to view serial output:
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```
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make -j4 flash monitor
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```
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
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## Example Output
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```
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app_main starting
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In constructor, arg=42
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In constructor, arg=0
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In destructor, m_arg=42
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Exception caught: Exception in constructor
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app_main done
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```
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