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Difference between revisions of "Coding Conventions"
→Use of global / static variables
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</syntax> | </syntax> | ||
is ''not'' sufficient. | is ''not'' sufficient. | ||
Therefore, '''use of non-const static globals inside function bodies is strictly forbidden''', as there is no way to reset them from code outside of that function. | |||
In addition, global variables are strongly discouraged; if they are to be used, then they ''must'' be accompanied by a comment that explains why this static variable is necessary, and why it cannot be replaced by something else, like typically a member variable of a suitable class / object. The comment should also indicate where the variable is (re)set when the engine launches. If no such comment is present, a generic comment of the following form shall be added to the variable declaration: | |||
<syntax type="C++"> | |||
// FIXME: non-const global var | |||
</syntax> | |||
As a minor exception, if an existing engine uses many globals (due to not (yet) being objectified), it is permissible to use a single comment to document multiple globals at once. | |||