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The C preprocessor (CPP) is a text file processor that is used with C, C++ and other programming tools. The preprocessor provides for file inclusion (often header files), macro expansion, conditional compilation, and line control. Although named in association with C and used with C, the preprocessor capabilities are not inherently tied to the ...
The most common example of this is the C preprocessor, which takes lines beginning with '#' as directives. The C preprocessor does not expect its input to use the syntax of the C language. Some languages take a different approach and use built-in language features to achieve similar things. For example:
Note that the preprocessor is in principle language agnostic, and is a lexical preprocessor, working at the lexical analysis level – it does not do parsing, and thus is unable to do any processing specific to C syntax. The input to the compiler is the translation unit, and thus it does not see any preprocessor directives, which have all been ...
The C language statements and expressions typically map well on to sequences of instructions for the target processor, and consequently there is a low run-time demand on system resources – it is fast to execute. With its rich set of operators, the C language can use many of the features of target CPUs.
Preprocessor, a program that processes its input data to produce output that is used as input to another program like a compiler; Data pre-processing, used in machine learning and data mining to make input data easier to work with
C. C alternative tokens; C preprocessor; The C Programming Language; C standard library; C syntax; C Traps and Pitfalls; C data types; C, The Complete Reference; C11 (C standard revision) C17 (C standard revision) C23 (C standard revision) C99; CERT Coding Standards; CFLAGS; Comma operator; Comp.lang.c; Compatibility of C and C++
A general-purpose macro processor or general purpose preprocessor is a macro processor that is not tied to or integrated with a particular language or piece of software.. A macro processor is a program that copies a stream of text from one place to another, making a systematic set of replacements as it does so.
In computing, blue paint refers to the mark given to preprocessing tokens by the C preprocessor that temporarily disables expansion of those tokens. A token is said to be painted blue when it has been disabled in this way.