From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- .../c/language%2Fattributes%2Freproducible.html | 22 ---------------------- 1 file changed, 22 deletions(-) delete mode 100644 devdocs/c/language%2Fattributes%2Freproducible.html (limited to 'devdocs/c/language%2Fattributes%2Freproducible.html') diff --git a/devdocs/c/language%2Fattributes%2Freproducible.html b/devdocs/c/language%2Fattributes%2Freproducible.html deleted file mode 100644 index fa0bc584..00000000 --- a/devdocs/c/language%2Fattributes%2Freproducible.html +++ /dev/null @@ -1,22 +0,0 @@ -

C attribute: unsequenced, reproducible (since C23) -

Provides the compiler with information about the access of objects by a function such that certain properties of function calls can be deduced.

-

Syntax

- - -
[[ unsequenced ]]
[[ __unsequenced__ ]]
(1)
[[ reproducible ]]
[[ __reproducible__ ]]
(2)
-1) Indicates that a function is effectless, idempotent, stateless, and independent
-2) Indicates that a function is effectless and idempotent

Explanation

These attributes apply to a function declarator or to a type specifier that has a function type. The corresponding attribute is a property of the function type.

-

Effectless

An evaluation of a function call is effectless if any store operation that is sequenced during the call is the modification of an object that synchronizes with the call; if additionally the operation is observable, all access to the object must be based on a unique pointer parameter of the function.

-

Idempotent

An evaluation E is idempotent if a second evaluation of E can be sequenced immediately after the original one without changing the resulting value, if any, or the observable state of the execution.

-

Stateless

A function F is stateless if any definition of an object of static or thread storage duration in F or in a function that is called by F is const but not volatile qualified.

-

Independent

A function F is independent if for any object X that is observed by a call to F through an lvalue that is not based on a parameter of the call, all accesses to X in all calls to F during the same program execution observe the same value; otherwise if the access is based on a pointer parameter, there shall be a unique such pointer parameter P such that any access to X shall be to an lvalue that is based on P.

-

An object X is observed by a function call if both synchronize, if X is not local to the call, if X has a lifetime that starts before the function call, and if an access of X is sequenced during the call; the last value of X, if any, that is stored before the call is said to be the value of X that is observed by the call.

-

Notes

These attributes exist for the purpose of compiler optimization.

-

If a function is reproducible, multiple subsequent calls can be treated as a single call.

-

If a function is unsequenced, multiple subsequent calls can be treated as a single call, and the calls can be parallelized and reordered arbitrarily.

-
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/language/attributes/reproducible -

-
-- cgit v1.2.3