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Text processor used with C and C++ and other programming tools
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
C_preprocessor
Program that processes input for another program
In computer science, a preprocessor (or precompiler) is a program that processes its input data to produce output that is used as input in another program
Preprocessor
Language construct that specifies how a compiler should process its input
term command. In C and C++, the language supports a simple macro preprocessor. Source lines that should be handled by the preprocessor, such as #define
Directive_(programming)
C/C++ directive to block repeated header inclusions
In the C and C++ programming languages, #pragma once is a non-standard but widely supported preprocessor directive designed to cause the current header
Pragma_once
General-purpose programming language
memory allocation through standard library functions. It includes the C preprocessor for macro definition, source-file inclusion, and conditional compilation
C_(programming_language)
Contest to produce obscure computer code
Winning entries are awarded with a category, such as "Worst Abuse of the C preprocessor" or "Most Erratic Behavior", and then announced on the official IOCCC
International Obfuscated C Code Contest
International_Obfuscated_C_Code_Contest
Macro taking a varying number of arguments
is a feature of some computer programming languages, especially the C preprocessor, whereby a macro may be declared to accept a varying number of arguments
Variadic_macro
Set of rules defining correctly structured C++ program
Traditionally (prior to C++20), code inclusion in C++ followed the ways of C, in which code was imported into another file using the preprocessor directive #include
C++_syntax
C-like programming language
the C-- language, forming the Cmm dialect which uses the C preprocessor for ergonomics. GHC backends are responsible for further transforming C-- into
C--
Modular translation unit in C++
during the linking phase. This is because modules are not handled by the C preprocessor during the preprocessing step, but rather directly by the compiler during
Modules_(C++)
Macro guard in C/C++ to block multiple inclusions
problem of double inclusion when dealing with the include directive. The C preprocessor processes inclusion directives like #include "Foo.h" to textually include
Include_guard
Extension of the C programming language
languages that proposed parallel extensions to ISO C 99: AC, Split-C, and Parallel C preprocessor (PCP). UPC is not a superset of these three languages
Unified_Parallel_C
Set of rules defining correctly structured programs for the C# programming language
when where with yield Although C# does not have a separate preprocessor, unlike C and C++ which use the C preprocessor, these 13 directives are processed
C_Sharp_syntax
Text file processor instruction to include the content of one file into another
combined file. Different processors may use different syntax. The C preprocessor (used with C, C++ and in other contexts) defines an include directive as a line
Include_directive
Form of text that defines C code
syntax of succeeding languages, including C++, Java, and C#. C code consists of preprocessor directives, and core-language types, variables and functions
C_syntax
Rule for substituting a set input with a set output
such as C and some assembly languages have rudimentary macro systems, implemented as preprocessors to the compiler or assembler. C preprocessor macros
Macro_(computer_science)
C programming language standard draft planned for release in 2029
syntax is the same as in Java. Add __COUNTER__ macro. Each time used, the preprocessor expands it into a unique sequential integer literal, starting from 0
C29_(C_standard_revision)
High-level shading language
can have own independent return type. GLSL defines a subset of the C preprocessor (CPP), combined with its own special directives for specifying versions
OpenGL_Shading_Language
Topics referred to by the same term
conferred by ASIS International C preprocessor, a program that processes the C programming language before it is compiled C++ (file extension: .cpp), a programming
CPP
Typographical mark (\)
Archived from the original on 2013-12-03. Retrieved 2009-10-11. "The C Preprocessor". GNU.org. Archived from the original on 2021-08-03. Retrieved 2021-01-04
Backslash
American computer programmer (born 1959)
blogger for Dr. Dobb's Journal. Around 2014, Bright wrote Warp, a fast C/C++ preprocessor written in D, for Facebook. Bengel, Erick (2016-06-30). "Museum of
Walter_Bright
Input to a C or C++ compiler from which an object file is generated
source code, includes directives for the C preprocessor. A translation unit is the output of the C preprocessor – a source file after it has been preprocessed
Translation unit (programming)
Translation_unit_(programming)
Software development tool for querying library dependency information
"libpng" and version "1.2.8". The Cflags entry defines an option that the C preprocessor uses to locate the library's header files – in /usr/local/include/libpng12
Pkg-config
Set of rules for naming entities in source code and documentation
Underscores with uppercase, as in UPPER_CASE, are commonly used for C preprocessor macros, hence known as MACRO_CASE, and for environment variables in
Naming convention (programming)
Naming_convention_(programming)
Integrated development environment product
C++ 2017. For example, generic selections via the _Generic keyword are not supported by the compiler and result in a syntax error. The preprocessor was
Microsoft_Visual_C++
C programming language standard, current revision
checked by preprocessor directives. Add __has_c_attribute allowing the availability of an attribute to be checked by preprocessor directives. (see "C++ compatibility"
C23_(C_standard_revision)
Part of a computer program where a given name binding is valid
Internal linkage in C is visibility at the translation unit level, namely a source file after being processed by the C preprocessor, notably including
Scope_(computer_programming)
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
Painted_blue
Windows software trace preprocessor (WPP; the preprocessor and related support tools are known as WPP Software Tracing) is a preprocessor that simplifies the
Windows software trace preprocessor
Windows_software_trace_preprocessor
Computer programming language
setf expansions and compiler-macros, result in a custom compile-time C preprocessor. "ECL 26.3.27 release". Weitz, Edmund (2016-01-01). Common Lisp Recipes:
Embeddable_Common_Lisp
the C preprocessor and make. The first version was written by Todd Brunhoff at Tektronix. imake generates makefiles from a template, a set of C preprocessor
Imake
C/C++ programming idiom
%d\n", #name, name); LIST_OF_VARIABLES #undef X } When run through the C preprocessor, the following code is generated. Line breaks and indentation have been
X_macro
Programming language family
languages such as the one defined by the C preprocessor (the macro preprocessor for the C, Objective-C and C++ programming languages), a macro returns
Lisp_(programming_language)
Typographic symbol (#)
scripting languages. In the C preprocessor (used by C and many other languages), # at the start of a line starts a preprocessor directive. Inside macros
Number_sign
the C preprocessor that inserts code before compilation. Consider: #define min(A,B) ((A)<(B)?(A):(B)) int shorter_magnitude(int a, int b, int c, int
Redundant_code
The ISO C specification makes allowance for these keywords as preprocessor macros in the header file iso646.h. For compatibility with C, C++ also provides
Operators_in_C_and_C++
Compiler option for C and C++ software development
Similarly, a variable CPPFLAGS exists with switches to be passed to the C or C++ preprocessor. Similarly, FFLAGS enables the addition of switches for a Fortran
CFLAGS
Two or three characters, treated as one
trigraphs in C and C++, there are no single-character equivalents to these in J. The C preprocessor (used for C and with slight differences in C++; see below)
Digraphs and trigraphs (programming)
Digraphs_and_trigraphs_(programming)
General-purpose programming language
attributes duplicate the functionality of GCC's and VisualC++'s platform-dependent preprocessor directives.[citation needed] System.Reflection.Emit namespace
C Sharp (programming language)
C_Sharp_(programming_language)
Identifier for a file type
libavcodec/raw.c Source File". ffmpeg.org. Retrieved June 9, 2019. "The C Preprocessor: Implementation-defined behavior". gcc.gnu.org. "ACPI ID Registry".
FourCC
System in web publishing
template system or application framework, and may be used also as a preprocessor or filter. With the model typically held in a relational database, the
Web_template_system
Scripting language created in 1994
Home Page, but it now stands for the recursive backronym PHP: Hypertext Preprocessor. PHP code is usually processed on a web server by a PHP interpreter implemented
PHP
Series of characters with a special meaning
Instead, it can be thought of as meaning "Disregard the newline": the C preprocessor joins the line with the subsequent line. When an escape character is
Escape_sequence
areas of file organization, code structure, code style, the use of the C preprocessor, and data organization. The aggregate results indicated that they scored
Comparison of open-source and closed-source software
Comparison_of_open-source_and_closed-source_software
Computer program or file valid in multiple programming languages or file formats
which is identical to the C printf except for its omission of brackets (which the C preprocessor adds if this is compiled with a C compiler). The final three
Polyglot_(computing)
Revision of the C++ programming language released in 2026
__has_embed allowing the availability of a resource to be checked by preprocessor directives Unevaluated strings Adding @, $, and ` to the basic character
C++26
The PL/I preprocessor is the preprocessor for the PL/I computer programming language. The preprocessor interprets a subset of the full PL/I language to
PL/I_preprocessor
System call in a Unix-like operating system kernel
__NR_write. This header may also be included by assembler code using the C preprocessor. fwrite getchar fprintf read (system call) sync (Unix) http://www.unix
Write_(system_call)
Metadata tag prefixed with #
around 1973, '#' was introduced in the C programming language to indicate special keywords that the C preprocessor had to process first. The pound sign
Hashtag
Macros whose expansion is guaranteed not to cause the capture of identifiers
%d, b is now %d\n", a, b); return 0; } Running the above through the C preprocessor produces: int main(void) { int a = 4, b = 8; { int a = 0; ++a; }; {
Hygienic_macro
General-purpose macro processor
General Public License. AWK – text processing programming language C preprocessor Macro (computer science) Make Template processor Web template system
M4_(computer_language)
List of programming languages types and the languages that meet its description
specially labeled code regions (pre-fixed with a # in the case of the C preprocessor). Alternatively, they may not, but in this case it is still often undesirable
List of programming languages by type
List_of_programming_languages_by_type
Optimized type of file in computer programming
automatically included in another source file by the C preprocessor by the use of a preprocessor directive in the source file. Header files can sometimes
Precompiled_header
Comparison of two programming languages
a preprocessor. There were programmers using a preprocessor also with Pascal (sometimes the same one used with C), certainly not as common as with C. Although
Comparison_of_Pascal_and_C
General-purpose programming language
have integrated subsets of the C preprocessor into their systems. SIMSCRIPT is an application specific Fortran preprocessor for modeling and simulating large
Fortran
Programming language
events, and value types directly in J#. Like C# and unlike Java, J# is able to use the C preprocessor directives. In January 2007, Microsoft announced:
Visual_J_Sharp
Specially annotated symbol in an object file
is not replaced with kernel module symbol when the module is loaded. C preprocessor (CPP) conditional constructs can also be used to switch between different
Weak_symbol
General-purpose, object-oriented programming language
Objective-C directive should not be confused with the C++ keyword import, which is used to import C++ modules (since C++20), and is not a preprocessor directive
Objective-C
Macro processor that is not tied to a particular language or piece of software
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
General-purpose macro processor
General-purpose_macro_processor
Low-level programming language family
of macro processing appeared, and appears, in the C programming language, which supports "preprocessor instructions" to set variables, and make conditional
Assembly_language
Including one data set inside another automatically
Stallman, Richard M.; Weinberg, Zachary. "Header Files" (PDF). The C Preprocessor: For gcc version 6.3.0 (GCC). pp. 10–11. Alternatives to Wrapper #ifndef :
Transclusion
Subset of a programming language
commonly used in C. The new compiler optimized code by default and allowed preprocessor directives for conditional compilation. Added features include boolean
Small-C
Header file for C programs
in the C standard library. It defines the C preprocessor macro assert and implements runtime assertion in C. <assert.h> is defined in ANSI C as part
Assert.h
Type of computer programming
supported COBOL inserts and overrides. A macro processor, such as the C preprocessor, which replaces patterns in source code according to relatively simple
Automatic_programming
Standards for the C programming language
ANSI C, ISO C, and Standard C are successive standards for the C programming language published by the American National Standards Institute (ANSI) and
ANSI_C
2011 edition of the C++ programming language standard
C, and most C++ compilers supported it as an extension already. C++03 provides two methods to test assertions: the macro assert and the preprocessor directive
C++11
Coding guidelines by Gerald J. Holzmann
the validity of all parameters provided by the caller. The use of the preprocessor must be limited to the inclusion of header files and simple macros definitions
The Power of 10: Rules for Developing Safety-Critical Code
The_Power_of_10:_Rules_for_Developing_Safety-Critical_Code
American activist and programmer (born 1953)
GCC in two parts, one part under GPL and the other part, an Objective-C preprocessor under a proprietary license. Stallman initially thought this would be
Richard_Stallman
2023 edition of the C++ programming language standard
and static lambdas simplifying implicit move auto(x) and auto{x} new preprocessor directives: #elifdef and #elifndef #warning extending the lifetime of
C++23
When a compiler produces a program which can change based on given parameters
conditional comments within JScript, known as conditional compilation. C# provides preprocessor directives for conditional compilation. #if DEBUG Console.WriteLine("Debug
Conditional_compilation
Multi-system emulator
Individual systems are specified by drivers which take the form of C preprocessor macros. These drivers specify the individual components to be emulated
MAME
Procedural, imperative computer programming language
time preprocessor was unusual (outside the Lisp world) in using its target language's syntax and semantics (e.g. as compared to the C preprocessor's "#"
PL/I
C++ IDE
Borland Turbo Incremental Linker, Borland Resource Compiler / Binder, C++ Win32 Preprocessor, ANSI/OEM character set file conversion utility, Import Definitions
Borland_C++
Programming language
File input/output Functions Header files Memory management Operators Preprocessor directives Recursion Standard streams Static variables String handling
Outline of the C programming language
Outline_of_the_C_programming_language
Standard library for the C programming language
that use of C compatibility headers will cause an especially strict C++98–20 preprocessor to raise a diagnostic of some sort. However, C++23 (unusually)
C_standard_library
Delimited series of characters that represent a string in code
overloaded for string literals in C++. This is particularly important when used in combination with the C preprocessor, to allow strings to be computed
String_literal
distributed revision control system GNU cflow – generates C flow graphs GNU cppi – indents C preprocessor directives in files to reflect their nesting GNU Fontutils
List_of_GNU_packages
Attempts to formalize the concept of algorithms
unrestricted (Turing complete), but the C preprocessor macro language is not, so any algorithm expressed in C preprocessor is a "simple algorithm". See also
Algorithm_characterizations
Shading language
structures with C, like if/else, while, and for. It also has a similar way of defining functions.[examples needed] Cg implements many C preprocessor directives
High-Level_Shader_Language
feature models. GenVoca features were originally implemented using C preprocessor (#ifdef feature ... #endif) techniques. A more advanced technique, called
Feature-oriented_programming
Software compilation technique for C/C++
Precompiled header Modules (C++) C preprocessor Whole program optimization Developer, Unicorn (2017-12-25). "Speeding up the Build of C and C++ Projects". Medium
Single_compilation_unit
Named set of data type values
use of the C preprocessor. Enumerated types in the C# programming language preserve most of the "small integer" semantics of C's enums. In C#, all enums
Enumerated_type
included in XML output and Doxygen-style tagfile (-D flag in 8.7). Partial C preprocessor support with -p flag. Support for #if/#ifdef control over documentation
Comparison of documentation generators
Comparison_of_documentation_generators
Fortran 2008 Backslash bash and other Unix shells C preprocessor macros; used in conjunction with C, C++ and many other programming contexts Crystal Mathematica
Comparison of programming languages (syntax)
Comparison_of_programming_languages_(syntax)
shipping Music-X audio software for the Amiga, and Lattice released its C++ preprocessor for the Amiga. Cygnus Editor ubiquitous text editor, one of the most
Amiga_software
General-purpose programming language
declaration and Unicode support. The language makes no use of macros or preprocessor instructions. Features adopted from modern languages include the addition
Zig_(programming_language)
Storage size operator in C and C++
cannot be used in C preprocessor expressions, such as #if, because it is an element of the programming language, not of the preprocessor syntax or its macros
Sizeof
Free and open-source compiler for various programming languages
as an intermediate language, and Paul Rubin for writing most of the preprocessor. Described as the "first free software hit" by Peter H. Salus, the GNU
GNU_Compiler_Collection
The Kinetic PreProcessor (KPP) is an open-source software tool used in atmospheric chemistry. Taking a set of chemical reactions and their rate coefficients
Kinetic_PreProcessor
Topics referred to by the same term
filename extension that may apply to: Files containing C Preprocessor directives Files containing C++ code This disambiguation page lists articles associated
.cpp
Digital identifier derived from the data by an algorithm
concatenation (as in archive files) or symbolic inclusion (as with the C preprocessor's #include directive). Some fingerprinting algorithms allow the fingerprint
Fingerprint_(computing)
Dynamic memory management in the C programming language
functions. In the source code the function can easily be replaced by using preprocessor macros, such as #define malloc custom_malloc #define realloc custom_realloc
C_dynamic_memory_allocation
Graphics programming language
common interface. For example, Cg/HLSL, GLSL, and MSL all implement C preprocessor macros, so it is possible to wrap all the different operations into
Shading_language
Programming language derived from Perl
source-code due to the widespread use of the C preprocessor. However, high-level languages such as Lisp pre-dated C in their use of macros that were far more
Raku_(programming_language)
Templates in computer programming
function Variadic macro in the C preprocessor Douglas Gregor & Jaakko Järvi (February 2008). "Variadic Templates for C++0x". Journal of Object Technology
Variadic_template
Multi-paradigm system programming language
GitHub. Retrieved 29 April 2020. "Under the Hood: warp, a fast C and C++ preprocessor". 28 March 2014. Retrieved 4 January 2018. "Faster Command Line
D_(programming_language)
Root-finding algorithm
less error. The following C code is the fast inverse square root implementation from Quake III Arena, stripped of C preprocessor directives, but including
Fast_inverse_square_root
Windows Runtime extension for C++ compilers
of the C++ Standard Library and WinRT. You can detect if C++/CX extension is turned on by testing existence of __cplusplus_winrt preprocessor symbol.
C++/CX
2017 edition of the C++ programming language standard
__has_include, allowing the availability of a header to be checked by preprocessor directives Value of __cplusplus changed to 201703L Exception specifications
C++17
In C#, source code files and logical units separation are not tightly related. Unlike Java, C# implements conditional compilation using preprocessor directives
Comparison of C Sharp and Java
Comparison_of_C_Sharp_and_Java
C PREPROCESSOR
C PREPROCESSOR
Girl/Female
American, British, English, Gaelic, Irish
A Combination of Initials K and C; Alert; Watchful; Vigorous
Male
Czechoslovakian
, fiery.
Male
Irish
Old Irish name MAEDÓC means "my dear Ãedh."
Boy/Male
American, British, English
Attractive; From the Initials J C
Girl/Female
American, British, English
Initials J and C Combined; Based on the Initials J C or an Abbreviation of Jacinda
Male
Vietnamese
Vietnamese name ̇ȬC means "desire."
Girl/Female
American, Australian, British, English
Initials J and C Combined; Based on the Initials J C or an Abbreviation of Jacinda
Girl/Female
American, British, English
A Combination of Initials K and C; Alert; Vigorous
Male
Czechoslovakian
, good-worker.
Male
English
Anglicized form of Old Irish Mael-Maedóc, MARMADUKE means "devotee of Maedóc."
Male
Irish
Old Irish Gaelic name MAEL-MAEDÓC means "devotee of Maedóc."
Girl/Female
American, Australian, Greek
Hyacinth Flower; Healer; Beautiful; Initials J and C Combined
Surname or Lastname
English
English : from the Old English personal name Beadurīc, composed of the elements beadu ‘battle’ + rīc ‘power’.
Surname or Lastname
English
English : unexplained.Thomas Broadnax (c.1586–c.1658) came from Godmersham, Kent, England, to VA in the early 17th century.
Male
Hungarian
Czech and Hungarian form of Latin Ignatius, possibly IGNÃC means "unknowing."
Surname or Lastname
English
English : from Old English Cynerīc ‘family ruler’.
Boy/Male
American, Australian
From the Initials J C
Girl/Female
American, Australian, British, English
Initials J and C Combined; Jaybird; Based on the Initials J C or an Abbreviation of Jacinda; A Blue; Crested Bird
Girl/Female
American, British, English, Gaelic, Irish
A Combination of Initials K and C; Alert; Vigorous; Watchful
Boy/Male
Shakespearean
King Henry IV, Part 1' Earl of March. Scroop.
C PREPROCESSOR
C PREPROCESSOR
Boy/Male
Egyptian
Name of a pharaoh.
Girl/Female
Muslim
Marble
Boy/Male
Indian
Pure
Girl/Female
Indian
Zilay: shadow, Share Urooj
Surname or Lastname
English
English : variant spelling of Dansie.
Boy/Male
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Tamil, Telugu
Victorious
Boy/Male
Indian, Punjabi, Sikh
Full of Love
Female
English
Variant spelling of English Marni, MARNIE means "of the sea."
Girl/Female
Teutonic Norse Swedish
Thunder.
Male
Arthurian
, le Noire; a knight of the Round Table.
C PREPROCESSOR
C PREPROCESSOR
C PREPROCESSOR
C PREPROCESSOR
C PREPROCESSOR
n.
Bill of an anchor. See Peak, 3 (c).
n.
Other species of Cabus, as C. fatuellus (the brown or horned capucine.), C. albifrons (the cararara), and C. apella.
superl.
Raised a semitone in pitch; as, C sharp (C/), which is a half step, or semitone, higher than C.
n.
Any species of the genus Cornus, as C. florida, the flowering cornel; C. stolonifera, the osier cornel; C. Canadensis, the dwarf cornel, or bunchberry.
a.
Major; in the major mode; as, C dur, that is, C major.
n.
A climbing species of Clematis (C. Vitalba).
n.
See Jack, 8 (c).
n.
An A-B-C book; a primer.
n.
A species of bindweed or Convolvulus (C. Scammonia).
n.
A trivalent hydrocarbon radical, CH3.C.
v.
and derivatives. See Behoove, &c.
n.
A small South American deer, of several species (Coassus superciliaris, C. rufus, and C. auritus).
a.
Having a barklike c/nenchyms.
n.
The jack. See 2d Jack, 8. (c).