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authorBob Duff <duff@adacore.com>2022-06-21 09:50:06 -0400
committerPierre-Marie de Rodat <derodat@adacore.com>2022-07-12 12:24:11 +0000
commit2148f2996ae76a7773eb7d8e30c02bd036ec7b3c (patch)
tree7aaa816d7c8d7e80b59386ddc2efda9f4ad8e39a /gcc/ada/fe.h
parentfe6f256d5ba85a588493a489af1bdbe8087e368a (diff)
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[Ada] Clean up scanner
This patch removes some obsolete code in the scanner and related files, and corrects some comments. Tok_Special is used only by the preprocessor, and uses only the two characters '#' and '$'. It might be simpler to have a single flag indicating we're scanning for preprocessing, instead of the Special_Characters array and the End_Of_Line_Is_Token flag, but that's for another day. gcc/ada/ * scans.ads: Fix obsolete comments about Tok_Special, and give Special_Character a predicate assuring it is one of the two characters used in preprocessing. * scng.ads: Clean up comments. * scng.adb: Clean up handling of Tok_Special. Remove comment about '@' (target_name), which doesn't seem very helpful. Set_Special_Character will now blow up if given anything other than '#' and '$', because of the predicate on Special_Character; it's not clear why it used to say "when others => null;". Remove Comment_Is_Token, which is not used. * scn.ads: Remove commented-out use clause. Remove redundant comment. * ali-util.adb: Use "is null" for do-nothing procedures. * gprep.adb (Post_Scan): Use "is null".
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