# C/C++ Definitions

(c_defines)=

This is a list of all the C/C++ preprocessor definitions provided by SPL Core. These are used to control the behavior of the code at compile time.

## SPLE_UNIT_TESTING

This definition is defined for any C/C++ code being compiled for unit testing in build kit `test`.

```c
#define SPLE_UNIT_TESTING
```

It can be used to conditionally compile code for unit testing.

## SPLE_TESTABLE_STATIC

This definition is defined for any C/C++ code being compiled using SPL Core.

For build kit `test`, this definition is defined to nothing to enable the testing and mocking of static functions and variables.

```c
#define SPLE_TESTABLE_STATIC=
```

For build kit `prod`, this definition is defined to `static`.

```c
#define SPLE_TESTABLE_STATIC=static
```

## SPLE_TESTABLE_INLINE

This definition is defined for any C/C++ code being compiled using SPL Core.

For build kit `test`, this definition is defined to nothing to enable the testing and mocking of inline functions.

```c
#define SPLE_TESTABLE_INLINE=
```

For build kit `prod`, this definition is defined to `inline`.

```c
#define SPLE_TESTABLE_INLINE=inline
```