为什么预处理器在#include指令中然后在[Files]部分的Inno Setup脚本中表现不同 [英] Why preprocessor behaves differently in #include directive then in [Files] section Inno Setup script

问题描述

试图理解使用宏搜索和查找文件时在Inno Setup脚本中包含另一个脚本文件和源文件的语法之间的区别.

Was trying to understand the difference between a syntax that would include another script file and a source file in Inno Setup script while using macros to search and find files.

我尝试使用在Inno Setup中使用通配符查找目录的方法FindFolder :

#define FindFolder(Path) \
    Local[0] = FindFirst(Path, faDirectory), \
    Local[0] ? AddBackslash(ExtractFileDir(Path)) + FindGetFileName(Local[0]) : Path

赞:

#include "{#FindFolder('..\..\..\packages\ScriptPreRequisites*')}\DotNetDependencies.iss"

推荐答案

在#中，您位于 Inno Setup预处理器.

有两种进入预处理器领域的方法.

There are two ways to enter preprocessor realm.

• 全行语法:

• Full line syntax:

#directive args

和内联语法:

And inline syntax:

{#directive args}

内联语法几乎专门用于 emit指令-{#emit <expression>}.因此，有一种简写格式，省略了emit:{#<expression>}.

The inline syntax is almost exclusively used for emit directive - {#emit <expression>}. And for this reason there's a shorthand format, with the emit omitted: {#<expression>}.

当您要在预处理器领域之外使用预处理器表达式时，内联语法很有用.就像在普通的Inno Setup部分(或Pascal脚本代码)中一样:

The inline syntax is useful when you want to use preprocessor expression outside of preprocessor realm. Like in normal Inno Setup sections (or in Pascal Script code):

[Files]
Source: "{#FindFolder("..\packages\PackagesA*")}\*.*"; DestDir: "{app}"; \
    flags: recursesubdirs  

---

尽管在 #include预处理程序指令中，您已经在预处理器领域.在那里，{#xxx}语法无效(理论上它甚至可能具有不同的[valid]含义，但实际上大括号在预处理器中没有用).

---

Though in #include preprocessor directive, you are already in the preprocessor realm. And there, the {#xxx} syntax is invalid (it might even have a different [valid] meaning theoretically, but actually curly brackets have no use in preprocessor).

#include指令的语法为:

#include <expression>

预处理器使用类似C的表达式语法.因此，在这种情况下，您的表情是:

The preprocessor uses C-like expression syntax. So your expression in this case is:

FindFolder('..\..\..\packages\ScriptPreRequisites*') + '\DotNetDependencies.iss'

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