Just as with C++, the standards committee maintains a public archive, which includes proposals for additions and defect reports: sc2. (This Rationale is not part of American National Standard X, but is included for .. Programming in C Markup by [email protected], revising the International Standard for the C programming language; and it retains .. not a rationale for the C language as a whole: the C89 Committee was .

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Retrieved 27 April The definition model to be used ratonale objects with external linkage was a major C89 standardization issue. Tentative definitions was created as a way to bridge incompatible models that existed pre-C Peter’s paragraph beginning “Before ” and the next covers my point in slightly different wording; I don’t think there’s a need to edit his answer to cover my point. Obviously the original creators, and then the pre-C99 standardizations, didn’t specify it that way.

c89 – Rationale for pre-C99 C not having initial declarations in for loops? – Stack Overflow

From that history, there is no x99 of any particular decision or rationale to exclude such features from early C – in short, it probably simply wasn’t thought of. This is also effectively ratinale for free as N Retrieved 12 August That discussion was often mostly along the lines of “would anything else in C break if we added this? Non-portable C Although it strove to give programmers the opportunity to write ratoonale portable programs, the C89 Committee did not want to force programmers into writing portably, to preclude the ratioale of C as a “high-level assembler”: Although it strove to give programmers the opportunity to write truly portable programs, the C89 Committee did not want to force programmers into writing portably, to preclude the use of C as a “high-level assembler”: Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.


Before C99, C did not allow you to define variables except at the start rationa,e a block. Why did the original C language not support initial declarations in for loop initializations?

Minimize incompatibilities with C From Wikipedia, the free encyclopedia.

Where I’ve looked I’ve tried finding an answer to this here and through general web-search-fu, with no luck: I wish compiler writers would recognize that Undefined Behavior was meant as an invitation for compiler writers to use judgment with regard to precedents and the needs of programmers which would often vary depending upon target platform and application fieldrather than as an invitation to throw judgment out the window.

Sign up using Email and Password. If not, then the tentative definition acts as an actual definition. Retrieved 9 January Existing code is important, existing implementations are not C code can be portable C code can be non-portable Avoid “quiet changes. The basic problem was to decide which declarations of an object define storage for the object, and which merely reference an existing object. Rrationale introduced several new ratipnale, many of which had already been implemented as extensions in several compilers: This page was last edited on 28 Decemberat C programming language Programming language standards Unix programming tools.


Here is the list.

The potential for efficient code generation is one of the most important strengths of C. You can obtain something very close to the standard for free rrationale they have made working drafts available, the latest is N Pre-C89 implementations exhibit at least four different modelslisted here in order of increasing restrictiveness:.

The Standard

Retrieved from ” http: Work continues on technical reports addressing decimal floating pointadditional mathematical special functionsand additional dynamic memory allocation functions. Either way, unless something better comes along, I will accept this answer in another day or so. M Oct 23 ’15 at 4: Retrieved 31 January Variables defined in the control part of a for loop were not at the start of a block, so there was no expectation that they’d be supported.

As romantic as it may seem to believe the designers Kernighan, Ritchie, etc thought of all the possibilities, and excluded features only after deep and meaningful consideration, the reality is that the early years of designing C like quite a few other programming languages followed a much more humble philosophy something like “Start small, don’t sweat about adding features unless programmers are being PREVENTED from doing something”.

So, even if there was someone begging or campaigning for such a feature which there probably wasn’tit probably went down in the priority order. Post as a guest Name. For other uses, see C99 disambiguation.