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- Forward_declaration abstract "In computer programming, a forward declaration is a declaration of an identifier (denoting an entity such as a type, a variable, a constant, or a function) for which the programmer has not yet given a complete definition.It is required for a compiler to know certain properties of an identifier (size for memory allocation, data type for type checking, such as type signature of functions), but not other details, like the particular value it holds (in case of variables or constants) or definition (in the case of functions). This is particularly useful for one-pass compilers and separate compilation.Forward declaration is used in languages that require declaration before use; it is necessary for mutual recursion in such languages, as it is impossible to define such functions (or data structures) without a forward reference in one definition: one of the functions (respectively, data structures) must be defined first. It is also useful to allow flexible code organization, for example if one wishes to place the main body at the top, and called functions below it.In other languages forward declarations are not necessary, which generally requires instead a multi-pass compiler and for some compilation to be deferred to link time. In these cases identifiers must be defined (variables initialized, functions defined) before they are used in execution, but do not need to be defined before they are used in source code for compilation or interpretation: identifiers do not need to be immediately resolved to an existing entity.".
- Forward_declaration wikiPageID "2959937".
- Forward_declaration wikiPageLength "8044".
- Forward_declaration wikiPageOutDegree "29".
- Forward_declaration wikiPageRevisionID "689063462".
- Forward_declaration wikiPageWikiLink C++.
- Forward_declaration wikiPageWikiLink C_(programming_language).
- Forward_declaration wikiPageWikiLink Category:Articles_with_example_C_code.
- Forward_declaration wikiPageWikiLink Category:Programming_constructs.
- Forward_declaration wikiPageWikiLink Compiler.
- Forward_declaration wikiPageWikiLink Computer_programming.
- Forward_declaration wikiPageWikiLink Data_type.
- Forward_declaration wikiPageWikiLink Declaration_(computer_programming).
- Forward_declaration wikiPageWikiLink Definition.
- Forward_declaration wikiPageWikiLink Function_prototype.
- Forward_declaration wikiPageWikiLink Identifier.
- Forward_declaration wikiPageWikiLink Link_time.
- Forward_declaration wikiPageWikiLink Memory_management.
- Forward_declaration wikiPageWikiLink Multi-pass_compiler.
- Forward_declaration wikiPageWikiLink Mutual_recursion.
- Forward_declaration wikiPageWikiLink Niklaus_Wirth.
- Forward_declaration wikiPageWikiLink Objective-C.
- Forward_declaration wikiPageWikiLink One-pass_compiler.
- Forward_declaration wikiPageWikiLink Pascal_(programming_language).
- Forward_declaration wikiPageWikiLink Separate_compilation.
- Forward_declaration wikiPageWikiLink Subroutine.
- Forward_declaration wikiPageWikiLink Synonym.
- Forward_declaration wikiPageWikiLink Type_signature.
- Forward_declaration wikiPageWikiLinkText "Forward declaration".
- Forward_declaration wikiPageWikiLinkText "Forward declaration#Forward_reference".
- Forward_declaration wikiPageWikiLinkText "forward declaration".
- Forward_declaration subject Category:Articles_with_example_C_code.
- Forward_declaration subject Category:Programming_constructs.
- Forward_declaration hypernym Declaration.
- Forward_declaration type Concept.
- Forward_declaration comment "In computer programming, a forward declaration is a declaration of an identifier (denoting an entity such as a type, a variable, a constant, or a function) for which the programmer has not yet given a complete definition.It is required for a compiler to know certain properties of an identifier (size for memory allocation, data type for type checking, such as type signature of functions), but not other details, like the particular value it holds (in case of variables or constants) or definition (in the case of functions). ".
- Forward_declaration label "Forward declaration".
- Forward_declaration sameAs Q782471.
- Forward_declaration sameAs Déclaration_avancée.
- Forward_declaration sameAs 前方宣言.
- Forward_declaration sameAs m.08g6dw.
- Forward_declaration sameAs Предварительное_объявление.
- Forward_declaration sameAs Q782471.
- Forward_declaration sameAs 前向声明.
- Forward_declaration wasDerivedFrom Forward_declaration?oldid=689063462.
- Forward_declaration isPrimaryTopicOf Forward_declaration.