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POSIX.1-2017 12.2 Utility Syntax Guidelines, Guideline 5 says: > One or more options without option-arguments, followed by at most one option that takes an option-argument, should be accepted when grouped behind one '-' delimiter. i.e. -abc represents -a -b -c. The grouped short options are very common. Many utilities extend the syntax by allowing (an option with an argument) following a sequence of short options. This patch adds the support to OptTable, similar to cl::Group for CommandLine (D58711). llvm-symbolizer will use the feature (D83530). CommandLine is exotic in some aspects. OptTable is preferred if the user wants to get rid of the behaviors. * `cl::opt<bool> i(...)` can be disabled via -i=false or -i=0, which is different from conventional --no-i. * Handling --foo & --no-foo requires a comparison of argument positions, which is a bit clumsy in user code. OptTable::parseOneArg (non-const reference InputArgList) is added along with ParseOneArg (const ArgList &). The duplicate does not look great at first glance. However, The implementation can be simpler if ArgList is mutable. (ParseOneArg is used by clang-cl (FlagsToInclude/FlagsToExclude) and lld COFF (case-insensitive). Adding grouped short options can make the function even more complex.) The implementation allows a long option following a group of short options. We probably should refine the code to disallow this in the future. Allowing this seems benign for now. Reviewed By: grimar, jhenderson Differential Revision: https://reviews.llvm.org/D83639
47 lines
2.1 KiB
TableGen
47 lines
2.1 KiB
TableGen
include "llvm/Option/OptParser.td"
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def OptFlag1 : OptionFlag;
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def OptFlag2 : OptionFlag;
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def OptFlag3 : OptionFlag;
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def A : Flag<["-"], "A">, HelpText<"The A option">, Flags<[OptFlag1]>;
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def AB : Flag<["-"], "AB">;
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def B : Joined<["-"], "B">, HelpText<"The B option">, MetaVarName<"B">, Flags<[OptFlag2]>;
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def C : Separate<["-"], "C">, HelpText<"The C option">, MetaVarName<"C">, Flags<[OptFlag1]>;
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def SLASH_C : Separate<["/", "-"], "C">, HelpText<"The C option">, MetaVarName<"C">, Flags<[OptFlag3]>;
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def D : CommaJoined<["-"], "D">, HelpText<"The D option">, MetaVarName<"D">;
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def E : MultiArg<["-"], "E", 2>, Flags<[OptFlag1, OptFlag2]>;
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def F : JoinedOrSeparate<["-"], "F">, HelpText<"The F option">, MetaVarName<"F">;
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def G : JoinedAndSeparate<["-"], "G">, HelpText<"The G option">, MetaVarName<"G">;
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def Ceq : Joined<["-", "--"], "C=">, Alias<C>, Flags<[OptFlag1]>;
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def H : Flag<["-"], "H">, Flags<[HelpHidden]>;
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def my_group : OptionGroup<"my group">;
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def I : Flag<["-"], "I">, Alias<H>, Group<my_group>;
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def J : Flag<["-"], "J">, Alias<B>, AliasArgs<["foo"]>;
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def Joo : Flag<["-"], "Joo">, Alias<B>, AliasArgs<["bar"]>;
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def K : Flag<["-"], "K">, Alias<B>;
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def Slurp : Option<["-"], "slurp", KIND_REMAINING_ARGS>;
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def SlurpJoined : Option<["-"], "slurpjoined", KIND_REMAINING_ARGS_JOINED>;
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def Blorp : Flag<["-", "--"], "blorp">, HelpText<"The blorp option">, Flags<[OptFlag1]>;
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def Blarn : Flag<["--", "-"], "blarn">, HelpText<"The blarn option">, Flags<[OptFlag1]>;
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def Cramb : Joined<["/"], "cramb:">, HelpText<"The cramb option">, MetaVarName<"CRAMB">, Flags<[OptFlag1]>;
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def Doopf1 : Flag<["-"], "doopf1">, HelpText<"The doopf1 option">, Flags<[OptFlag1]>;
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def Doopf2 : Flag<["-"], "doopf2">, HelpText<"The doopf2 option">, Flags<[OptFlag2]>;
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def Ermgh : Joined<["--"], "ermgh">, HelpText<"The ermgh option">, MetaVarName<"ERMGH">, Flags<[OptFlag1]>;
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def Fjormp : Flag<["--"], "fjormp">, HelpText<"The fjormp option">, Flags<[OptFlag1]>;
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def Glorrmp_eq : Flag<["--"], "glorrmp=">;
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def Blurmpq : Flag<["--"], "blurmp">;
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def Blurmpq_eq : Flag<["--"], "blurmp=">;
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def DashDash : Option<["--"], "", KIND_REMAINING_ARGS>;
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