[xyzzy:02122] Re: defconstant

[Tetsuya Kamei <kamei@xxxxxxxxxxxx>]

山本さん、こんにちは。

    Fri, 12 Mar 1999 14:51:53 +0900 の
   “[xyzzy:02118] Re: defconstant”
    への返事です.

| そういうものなのでしょうか？

私がコンパイル時に評価しているのは、CLtL2 の 25.1.3. Compilation 
Environment にそうしてもいいと書いてあるからです。別にこれが絶
対というわけではありませんけどね。

> defconstant 
> 
> The compiler must recognize that the symbol names a constant. 
> An implementation may choose to evaluate the value-form at 
> compile time, load time, or both. Therefore the user must ensure 
> that the value-form is evaluable at compile time (regardless 
> of whether or not references to the constant appear in the file) 
> and that it always evaluates to the same value. (There has been 
> considerable variance among implementations on this point. The 
> effect of this specification is to legitimize all of the 
> implementation variants by requiring care of the user.) 

--
亀井哲弥(Tetsuya Kamei)
kamei@xxxxxxxxxxxx/JCA00343@xxxxxxxxxxx