Author:halw

Date:2011-01-08T17:30:59.000000Z


git-svn-id: https://svn.eiffel.com/eiffel-org/trunk@727 abb3cda0-5349-4a8f-a601-0c33ac3a8c38
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halw
2011-01-10 15:59:59 +00:00
parent 4b7db9f3d2
commit 727cd33651
2 changed files with 29 additions and 1 deletions

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@@ -14,7 +14,7 @@ EiffelStudio project settings supports four of these syntax compilation variants
Because the language, and by necessity the compilation technology too, may at times be a moving target, it is difficult to give precise definitions of what these variants mean at any given time. Today's valid identifier is tomorrow's keyword and vice versa.
{{Recommended|It's always a good idea to check the [[EiffelStudio release notes]] and [[Differences between standard ECMA-367 and Eiffel Software implementation]] when you install a new version to see if new language elements are supported or existing ones have been made obsolete. }}
{{Recommended|It's always a good idea to check the [[EiffelStudio release notes]] and [[Differences between standard ECMA-367 and Eiffel Software implementation]] when you install a new version to see if new language elements are supported or existing ones have been made obsolete. <br/><br/>Additionally, you can see more detail on how these variants effect certain words in a particular version by checking the [[Syntax level variant settings by version|syntax level variant settings by version.]]}}
Even so, we can use an example from a particular point in time to show the basic idea. At one time, the word '''indexing''' was a keyword, and the word '''note''' was available for use as a valid identifier. But there came a time that due to a consensus of opinion within the Eiffel standards committee, the role of the keyword <code>indexing</code> was replaced by a new keyword <code>note</code>. This meant two things. First that if you had used the keyword <code>indexing</code> in your classes (and who hadn't?), then at some point you would want to change those occurrences to <code>note</code>. Second, if you had used the word '''note''' as an identifier, then at some point you would have to change your code to use a different identifier it its place.