Preprocessor Overview

Preprocessor is a special compiler that is run each time the application compiles the protocol definition file. It executes before compilation of the source file and prepares a source file for compilation.

Device Monitoring Studio provides a fully C99-compliant preprocessor which supports the following directives:

#include

Performs a physical inclusion of the contents of another source file into the current file.

#pragma once

Prevents a file from being included multiple times.

#define, #undef

Allows defining preprocessing constants and macros.

#if, #ifdef, #ifndef, #else, #elif, #endif, defined() operator.

Provides support for conditional compilation.

#error

Unconditionally stops source file compilation.