syntax(sh): Improve the recognition of bracket expressions
Commit:
https://github.com/vim/vim/commit/48fa3198b7118023fea4b15015a97c920887eb07
Author: Aliaksei Budavei <0x000...@gmail.com>
Date: Mon Dec 30 10:23:50 2024 +0100
syntax(sh): Improve the recognition of bracket expressions
- Define a general non-"contained" "shBracketExpr" group,
and replace with it the "contained" bracket variant of
"shOperator", adjusting the patterns for the competing
conditional commands "[" and "[[".
- Accommodate some unbalanced brackets (e.g. "[!][!]").
- Make the leading "!" (or "^") stand out in NON-matching
bracket expressions.
- Support literal newlines in parametric patterns (along
with pathname globbings and "case" patterns).
- Also match bracket expressions in:
* parametric patterns (e.g. "${1#[ab]_}");
* pathname globbings (e.g. "[ab]*.txt");
* arguments for the "[[", "echo", and "print" commands.
- Recognise collating symbols (e.g. "[.a.]") and equivalence
classes (e.g. "[=a=]").
- Recognise end patterns for a pattern substitution form of
parameter expansion and match bracket expressions in such
patterns (e.g. "${1/%[.!]/;}").
fixes #15799
closes: #15941
References:
https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/V1_chap09.html#tag_09_03_05
https://pubs.opengroup.org/onlinepubs/9799919799/utilities/V3_chap02.html#tag_19_14
https://git.savannah.gnu.org/gitweb/?p=bash.git;a=blob_plain;f=doc/bash.html;hb=37b7e91d64ad10b1a1815d12128c9475636df670
http://www.mirbsd.org/htman/i386/man1/mksh.htm
Signed-off-by: Aliaksei Budavei <0x000...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>
diff --git a/runtime/syntax/sh.vim b/runtime/syntax/sh.vim
index 97e74d205..0a8fb47b7 100644
--- a/runtime/syntax/sh.vim
+++ b/runtime/syntax/sh.vim
@@ -4,6 +4,7 @@
" Previous Maintainers: Charles E. Campbell
" Lennart Schultz <lennart.schu...@ecmwf.int>
" Last Change: 2024 Mar 04 by Vim Project
+" 2024 Nov 03 by Aliaksei Budavei <0x000c70 AT gmail DOT com>
(improved bracket expressions, #15941)
" Version: 208
" Former URL: http://www.drchip.org/astronaut/vim/index.html#SYNTAX_SH
" For options and settings, please use: :help ft-sh-syntax
@@ -127,6 +128,50 @@ else
com! -nargs=* ShFoldIfDoFor <args>
endif
+" Generate bracket expression items {{{1
+" =================================
+" Note that the following function can be invoked as many times as necessary
+" provided that these constraints hold for the passed dictionary argument:
+" - every time a unique group-name value is assigned to the "itemGroup" key;
+" - only ONCE either the "extraArgs" key is not entered or it is entered and
+" its value does not have "contained" among other optional arguments (":help
+" :syn-arguments").
+fun! s:GenerateBracketExpressionItems(dict) abort
+ let itemGroup = a:dict.itemGroup
+ let bracketGroup = a:dict.bracketGroup
+ let invGroup = itemGroup . 'Inv'
+ let skipLeftBracketGroup = itemGroup . 'SkipLeftBracket'
+ let skipRightBracketGroup = itemGroup . 'SkipRightBracket'
+ let extraArgs = has_key(a:dict, 'extraArgs') ? a:dict.extraArgs : ''
+
+ " Make the leading "[!^]" stand out in a NON-matching expression.
+ exec 'syn match ' . invGroup . ' contained "\[\@<=[!^]"'
+
+ " Set up indirections for unbalanced-bracket highlighting.
+ exec 'syn region ' . skipRightBracketGroup . ' contained matchgroup=' .
bracketGroup . ' start="\[\%([!^]\=\\=\]\)\@=" matchgroup=shCollSymb
end="\[\.[^]]\{-}\][^]]\{-}\.\]" matchgroup=' . itemGroup . ' end="\]"
contains=@shBracketExprList,shDoubleQuote,' . invGroup
+ exec 'syn region ' . skipLeftBracketGroup . ' contained matchgroup=' .
bracketGroup . ' start="\[\%([!^]\=\\=\]\)\@="
skip="[!^]\=\\=\]\%(\[[^]]\+\]\|[^]]\)\{-}\%(\[[:.=]\@!\)\@=" matchgroup=' .
itemGroup . ' end="\[[:.=]\@!" contains=@shBracketExprList,shDoubleQuote,' .
invGroup
+
+ " Look for a general matching expression.
+ exec 'syn region ' . itemGroup . ' matchgroup=' . bracketGroup . '
start="\[\S\@=" end="\]" contains=@shBracketExprList,shDoubleQuote ' . extraArgs
+ " Look for a general NON-matching expression.
+ exec 'syn region ' . itemGroup . ' matchgroup=' . bracketGroup . '
start="\[[!^]\@=" end="\]" contains=@shBracketExprList,shDoubleQuote,' .
invGroup . ' ' . extraArgs
+
+ " Accommodate unbalanced brackets in bracket expressions. The supported
+ " syntax for a plain "]" can be: "[]ws]" and "[^]ws]"; or, "[ws[.xs]ys.]zs]"
+ " and "[^ws[.xs]ys.]zs]"; see ยง9.3.5 RE Bracket Expression (in XBD).
+ exec 'syn region ' . itemGroup . ' matchgroup=NONE start="\[[!^]\=\\=\]"
matchgroup=' . bracketGroup . ' end="\]"
contains=@shBracketExprList,shDoubleQuote,' . skipRightBracketGroup . ' ' .
extraArgs
+ " Strive to handle "[]...[]" etc.
+ exec 'syn region ' . itemGroup . ' matchgroup=NONE
start="\[[!^]\=\\=\]\%(\[[^]]\+\]\|[^]]\)\{-}\[[:.=]\@!" matchgroup=' .
bracketGroup . ' end="\]" contains=@shBracketExprList,shDoubleQuote,' .
skipLeftBracketGroup . ' ' . extraArgs
+
+ if !exists("g:skip_sh_syntax_inits")
+ exec 'hi def link ' . skipLeftBracketGroup . ' ' . itemGroup
+ exec 'hi def link ' . skipRightBracketGroup . ' ' . itemGroup
+ exec 'hi def link ' . invGroup . ' Underlined'
+ endif
+endfun
+
+call s:GenerateBracketExpressionItems({'itemGroup': 'shBracketExpr',
'bracketGroup': 'shBracketExprDelim'})
+
" sh syntax is case sensitive {{{1
syn case match
@@ -136,23 +181,24 @@ syn cluster shErrorList
contains=shDoError,shIfError,shInError,shCaseError,shEsa
if exists("b:is_kornshell") || exists("b:is_bash")
syn cluster ErrorList add=shDTestError
endif
-syn cluster shArithParenList
contains=shArithmetic,shArithParen,shCaseEsac,shComment,shDeref,shDo,shDerefSimple,shEcho,shEscape,shNumber,shOperator,shPosnParm,shExSingleQuote,shExDoubleQuote,shHereString,shRedir,shSingleQuote,shDoubleQuote,shStatement,shVariable,shAlias,shTest,shCtrlSeq,shSpecial,shParen,bashSpecialVariables,bashStatement,shIf,shFor,shFunctionKey,shFunctionOne,shFunctionTwo
+syn cluster shArithParenList
contains=shArithmetic,shArithParen,shCaseEsac,shComment,shDeref,shDerefVarArray,shDo,shDerefSimple,shEcho,shEscape,shExpr,shNumber,shOperator,shPosnParm,shExSingleQuote,shExDoubleQuote,shHereString,shRedir,shSingleQuote,shDoubleQuote,shStatement,shVariable,shAlias,shTest,shCtrlSeq,shSpecial,shParen,bashSpecialVariables,bashStatement,shIf,shFor,shFunctionKey,shFunctionOne,shFunctionTwo
syn cluster shArithList contains=@shArithParenList,shParenError
+syn cluster shBracketExprList
contains=shCharClassOther,shCharClass,shCollSymb,shEqClass
syn cluster shCaseEsacList
contains=shCaseStart,shCaseLabel,shCase,shCaseBar,shCaseIn,shComment,shDeref,shDerefSimple,shCaseCommandSub,shCaseExSingleQuote,shCaseSingleQuote,shCaseDoubleQuote,shCtrlSeq,@shErrorList,shStringSpecial,shCaseRange
syn cluster shCaseList
contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shComment,shDblBrace,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq
if exists("b:is_kornshell") || exists("b:is_bash")
syn cluster shCaseList add=shForPP,shDblParen
endif
-syn cluster shCommandSubList
contains=shAlias,shArithmetic,shCmdParenRegion,shCommandSub,shComment,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
+syn cluster shCommandSubList
contains=shAlias,shArithmetic,shBracketExpr,shCmdParenRegion,shCommandSub,shComment,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
syn cluster shCurlyList
contains=shNumber,shComma,shDeref,shDerefSimple,shDerefSpecial
" COMBAK: removing shEscape from shDblQuoteList fails ksh04:43 -- Jun 09,
2022: I don't see the problem with ksh04, so am reinstating shEscape
syn cluster shDblQuoteList
contains=shArithmetic,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shDeref,shDerefSimple,shEscape,shPosnParm,shCtrlSeq,shSpecial,shSpecialDQ
syn cluster shDerefList
contains=shDeref,shDerefSimple,shDerefVar,shDerefSpecial,shDerefWordError,shDerefPSR,shDerefPPS
syn cluster shDerefVarList
contains=shDerefOffset,shDerefOp,shDerefVarArray,shDerefOpError
-syn cluster shEchoList
contains=shArithmetic,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shDeref,shDerefSimple,shEscape,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shCtrlSeq,shEchoQuote
-syn cluster shExprList1
contains=shCharClass,shNumber,shOperator,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shDblBrace,shDeref,shDerefSimple,shCtrlSeq
+syn cluster shEchoList
contains=shArithmetic,shBracketExpr,shCommandSub,shCommandSubBQ,shDerefVarArray,shSubshare,shValsub,shDeref,shDerefSimple,shEscape,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shCtrlSeq,shEchoQuote
+syn cluster shExprList1
contains=shBracketExpr,shNumber,shOperator,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shDblBrace,shDeref,shDerefSimple,shCtrlSeq
syn cluster shExprList2 contains=@shExprList1,@shCaseList,shTest
-syn cluster shFunctionList
contains=@shCommandSubList,shCaseEsac,shColon,shComment,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shOption,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shOperator,shCtrlSeq
+syn cluster shFunctionList
contains=shBracketExpr,@shCommandSubList,shCaseEsac,shColon,shComment,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shOption,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shOperator,shCtrlSeq
if exists("b:is_kornshell") || exists("b:is_bash")
syn cluster shFunctionList add=shRepeat,shDblBrace,shDblParen,shForPP
syn cluster shDerefList add=shCommandSubList,shEchoDeref
@@ -160,16 +206,16 @@ endif
syn cluster shHereBeginList contains=@shCommandSubList
syn cluster shHereList contains=shBeginHere,shHerePayload
syn cluster shHereListDQ
contains=shBeginHere,@shDblQuoteList,shHerePayload
-syn cluster shIdList
contains=shArithmetic,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shWrapLineOperator,shSetOption,shComment,shDeref,shDerefSimple,shHereString,shNumber,shOperator,shRedir,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shCtrlSeq,shStringSpecial,shAtExpr
+syn cluster shIdList
contains=shArithmetic,shCommandSub,shCommandSubBQ,shDerefVarArray,shSubshare,shValsub,shWrapLineOperator,shSetOption,shComment,shDeref,shDerefSimple,shHereString,shNumber,shOperator,shRedir,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shCtrlSeq,shStringSpecial,shAtExpr
syn cluster shIfList
contains=@shLoopList,shDblBrace,shDblParen,shFunctionKey,shFunctionOne,shFunctionTwo
syn cluster shLoopList
contains=@shCaseList,@shErrorList,shCaseEsac,shConditional,shDblBrace,shExpr,shFor,shIf,shOption,shSet,shTest,shTestOpr,shTouch
if exists("b:is_kornshell") || exists("b:is_bash")
syn cluster shLoopList add=shForPP,shDblParen
endif
-syn cluster shPPSLeftList
contains=shAlias,shArithmetic,shCmdParenRegion,shCommandSub,shSubshare,shValsub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
+syn cluster shPPSLeftList
contains=shAlias,shArithmetic,shBracketExpr,shCmdParenRegion,shCommandSub,shSubshare,shValsub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
syn cluster shPPSRightList
contains=shDeref,shDerefSimple,shEscape,shPosnParm
-syn cluster shSubShList
contains=@shCommandSubList,shCommandSubBQ,shSubshare,shValsub,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq,shOperator
-syn cluster shTestList
contains=shArithmetic,shCharClass,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shSpecialDQ,shExDoubleQuote,shExpr,shExSingleQuote,shNumber,shOperator,shSingleQuote,shTest,shTestOpr
+syn cluster shSubShList
contains=shBracketExpr,@shCommandSubList,shCommandSubBQ,shSubshare,shValsub,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq,shOperator
+syn cluster shTestList
contains=shArithmetic,shBracketExpr,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shSpecialDQ,shExDoubleQuote,shExpr,shExSingleQuote,shNumber,shOperator,shSingleQuote,shTest,shTestOpr
syn cluster shNoZSList contains=shSpecialNoZS
syn cluster shForList
contains=shTestOpr,shNumber,shDerefSimple,shDeref,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shArithmetic
@@ -190,7 +236,7 @@ endif
syn match shEchoQuote contained '\%(\\\)*\["`'()]'
" This must be after the strings, so that ... \" will be correct
-syn region shEmbeddedEcho contained matchgroup=shStatement start="\<print\>"
skip="\$" matchgroup=shEchoDelim end="$" matchgroup=NONE end="[<>;&|`)]"me=e-1
end="\d[<>]"me=e-2 end="\s#"me=e-2
contains=shNumber,shExSingleQuote,shSingleQuote,shDeref,shDerefSimple,shSpecialVar,shOperator,shExDoubleQuote,shDoubleQuote,shCharClass,shCtrlSeq
+syn region shEmbeddedEcho contained matchgroup=shStatement start="\<print\>"
skip="\$" matchgroup=shEchoDelim end="$" matchgroup=NONE end="[<>;&|`)]"me=e-1
end="\d[<>]"me=e-2 end="\s#"me=e-2
contains=shBracketExpr,shNumber,shExSingleQuote,shSingleQuote,shDeref,shDerefSimple,shSpecialVar,shOperator,shExDoubleQuote,shDoubleQuote,shCtrlSeq
" Alias: {{{1
" =====
@@ -240,7 +286,6 @@ syn match shRedir "\d<<-\="
" ==========
syn match shOperator "<<\|>>" contained
syn match shOperator "[!&;|]" contained
-syn match shOperator "\[[[^:]\|\]]" contained
syn match shOperator "[-=/*+%]\==" skipwhite nextgroup=shPattern
syn match shPattern "\<\S\+\())\)\@=" contained
contains=shExSingleQuote,shSingleQuote,shExDoubleQuote,shDoubleQuote,shDeref
@@ -251,9 +296,9 @@ syn region shSubSh transparent matchgroup=shSubShRegion
start="[^(]\zs(" end=")"
" Tests: {{{1
"=======
-syn region shExpr matchgroup=shRange start="\[" skip=+\\\|\$\|\[+
end="\]" contains=@shTestList,shSpecial
+syn region shExpr matchgroup=shRange start="\[\s\@=" skip=+\\\|\$\|\[+
end="\]" contains=@shTestList,shSpecial
syn region shTest transparent matchgroup=shStatement start="\<test\s"
skip=+\\\|\$+ matchgroup=NONE end="[;&|]"me=e-1 end="$" contains=@shExprList1
-syn region shNoQuote start='\S' skip='\%(\\\)*\.' end='\ze\s'
end="\ze['"]" contained contains=shDerefSimple,shDeref
+syn region shNoQuote start='\S' skip='\%(\\\)*\.' end='\ze\s'
end="\ze['"]" contained contains=shBracketExpr,shDerefSimple,shDeref
syn match shAstQuote contained '\*\ze"' nextgroup=shString
syn match shTestOpr contained '[^-+/%]\zs=' skipwhite
nextgroup=shTestDoubleQuote,shTestSingleQuote,shTestPattern
syn match shTestOpr contained
"<=\|>=\|!=\|==\|=\~\|-.\>\|-\(nt\|ot\|ef\|eq\|ne\|lt\|le\|gt\|ge\)\>\|[!<>]"
@@ -262,13 +307,16 @@ syn region shTestDoubleQuote contained
start='\%(\%(\\\)*\\)\@<!"' skip=+\\
syn match shTestSingleQuote contained '\.'
nextgroup=shTestSingleQuote
syn match shTestSingleQuote contained "'[^']*'"
if exists("b:is_kornshell") || exists("b:is_bash")
- syn region shDblBrace matchgroup=Delimiter start="\[\["
skip=+\%(\\\)*\$+ end="\]\]"
contains=@shTestList,shAstQuote,shNoQuote,shComment
+ syn region shDblBrace matchgroup=Delimiter start="\[\[\s\@="
skip=+\%(\\\)*\$+ end="\]\]"
contains=@shTestList,shAstQuote,shNoQuote,shComment
syn region shDblParen matchgroup=Delimiter start="(("
skip=+\%(\\\)*\$+ end="))" contains=@shTestList,shComment
endif
" Character Class In Range: {{{1
" =========================
+syn match shCharClassOther contained "\[:\w\{-}:\]"
syn match shCharClass contained
"\[:\(backspace\|escape\|return\|xdigit\|alnum\|alpha\|blank\|cntrl\|digit\|graph\|lower\|print\|punct\|space\|upper\|tab\):\]"
+syn match shCollSymb contained "\[\..\{-}\.\]"
+syn match shEqClass contained "\[=.\{-}=\]"
" Loops: do, if, while, until {{{1
" ======
@@ -298,7 +346,7 @@ syn match shComma contained ","
" ====
syn match shCaseBar contained skipwhite "\(^\|[^\]\)\(\\\)*\zs|"
nextgroup=shCase,shCaseStart,shCaseBar,shComment,shCaseExSingleQuote,shCaseSingleQuote,shCaseDoubleQuote
syn match shCaseStart contained skipwhite skipnl "("
nextgroup=shCase,shCaseBar
-syn match shCaseLabel contained skipwhite "\%(\.\|[-a-zA-Z0-9_*.]\)\+"
contains=shCharClass
+syn match shCaseLabel contained skipwhite "\%(\.\|[-a-zA-Z0-9_*.]\)\+"
contains=shBracketExpr
if exists("b:is_bash")
ShFoldIfDoFor syn region shCase contained skipwhite skipnl
matchgroup=shSnglCase start="\%(\.\|[^#$()'" ]\)\{-}\zs)" end=";;"
end=";&" end=";;&" end="esac"me=s-1 contains=@shCaseList
nextgroup=shCaseStart,shCase,shComment
elseif exists("b:is_kornshell")
@@ -317,11 +365,9 @@ endif
syn region shCaseSingleQuote matchgroup=shQuote start=+'+ end=+'+
contains=shStringSpecial skipwhite skipnl nextgroup=shCaseBar
contained
syn region shCaseDoubleQuote matchgroup=shQuote start=+"+ skip=+\\\|\.+
end=+"+ contains=@shDblQuoteList,shStringSpecial skipwhite skipnl
nextgroup=shCaseBar contained
syn region shCaseCommandSub start=+`+ skip=+\\\|\.+ end=+`+
contains=@shCommandSubList skipwhite skipnl nextgroup=shCaseBar
contained
+call s:GenerateBracketExpressionItems({'itemGroup': 'shCaseRange',
'bracketGroup': 'shBracketExprDelim', 'extraArgs': 'skip=+\\+ contained'})
if exists("b:is_bash")
- syn region shCaseRange matchgroup=Delimiter start=+\[+ skip=+\\+
end=+\]+ contained contains=shCharClass
syn match shCharClass
'\[:\%(alnum\|alpha\|ascii\|blank\|cntrl\|digit\|graph\|lower\|print\|punct\|space\|upper\|word\|or\|xdigit\):\]'
contained
-else
- syn region shCaseRange matchgroup=Delimiter start=+\[+ skip=+\\+
end=+\]+ contained
endif
" Misc: {{{1
"======
@@ -453,7 +499,18 @@ endif
"=============
syn match shSetOption "\s\zs[-+][a-zA-Z0-9]\+\>" contained
syn match shVariable "\<\h\w*\ze=" nextgroup=shVarAssign
-syn match shVarAssign "=" contained
nextgroup=shCmdParenRegion,shPattern,shDeref,shDerefSimple,shDoubleQuote,shExDoubleQuote,shSingleQuote,shExSingleQuote,shVar
+if exists("b:is_bash")
+ " The subscript form for array values, e.g. "foo=([2]=10 [4]=100)".
+ syn region shArrayValue contained start="\[\%(..\{-}\]=\)\@="
end="\]=\@=" contains=@shArrayValueList nextgroup=shVarAssign
+ syn cluster shArrayValueList
contains=shArithmetic,shArithParen,shCommandSub,shDeref,shDerefSimple,shExpr,shNumber,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shSpecial,shParen,bashSpecialVariables,shParenError
+endif
+if exists("b:is_bash") || exists("b:is_kornshell")
+ syn match shVariable
"\<\h\w*\%(\[..\{-}\]\)\=\ze\%([|^&*/%+-]\|[<^]<\|[>^]>\)\=="
contains=shDerefVarArray nextgroup=shVarAssign
+ syn match shVarAssign contained "\%([|^&*/%+-]\|[<^]<\|[>^]>\)\=="
nextgroup=shArrayRegion,shPattern,shDeref,shDerefSimple,shDoubleQuote,shExDoubleQuote,shSingleQuote,shExSingleQuote,shVar
+ syn region shArrayRegion contained matchgroup=shShellVariables start="("
skip='\\\|\.' end=")" contains=@shArrayValueList,shArrayValue,shComment
+else
+ syn match shVarAssign contained "="
nextgroup=shPattern,shDeref,shDerefSimple,shDoubleQuote,shExDoubleQuote,shSingleQuote,shExSingleQuote,shVar
+endif
syn match shVar contained "\h\w*"
syn region shAtExpr contained start="@(" end=")" contains=@shIdList
if exists("b:is_bash")
@@ -571,8 +628,11 @@ syn match shDerefOp contained ":\=+"
nextgroup=@shDerefPatternList
if exists("b:is_bash") || exists("b:is_kornshell") || exists("b:is_posix")
syn match shDerefOp contained "#\{1,2}"
nextgroup=@shDerefPatternList
syn match shDerefOp contained "%\{1,2}"
nextgroup=@shDerefPatternList
- syn match shDerefPattern contained "[^{}]\+"
contains=shDeref,shDerefSimple,shDerefPattern,shDerefString,shCommandSub,shDerefEscape
nextgroup=shDerefPattern
+ syn match shDerefPattern contained "[^{}]\+"
contains=shDeref,shDerefSimple,shDerefPattern,shDerefString,shCommandSub,shDerefEscape
nextgroup=shDerefPattern skipnl
syn region shDerefPattern contained start="{" end="}"
contains=shDeref,shDerefSimple,shDerefString,shCommandSub
nextgroup=shDerefPattern
+ " Match parametric bracket expressions with a leading whitespace character.
+ syn region shDerefPattern contained matchgroup=shBracketExprDelim
start="\[" end="\]" contains=@shBracketExprList,shDoubleQuote
nextgroup=shDerefPattern
+ call s:GenerateBracketExpressionItems({'itemGroup': 'shDerefPattern',
'bracketGroup': 'shBracketExprDelim', 'extraArgs': 'contained
nextgroup=shDerefPattern'})
syn match shDerefEscape contained '\%(\\\)*\.'
endif
if exists("b:is_bash")
@@ -592,15 +652,16 @@ if exists("b:is_bash") || exists("b:is_kornshell") ||
exists("b:is_posix")
endif
if exists("b:is_bash")
+ " bash : ${parameter/pattern/string}
" bash : ${parameter//pattern/string}
- " bash : ${parameter//pattern}
syn match shDerefPPS contained '/\{1,2}' nextgroup=shDerefPPSleft
syn region shDerefPPSleft contained start='.'
skip=@\%(\\\)*\/@ matchgroup=shDerefOp end='/' end='\ze}' end='"'
nextgroup=shDerefPPSright contains=@shPPSLeftList
syn region shDerefPPSright contained start='.'
skip=@\%(\\\)\+@ end='\ze}'
contains=@shPPSRightList
- " bash : ${parameter/#substring/replacement}
- syn match shDerefPSR contained '/#'
nextgroup=shDerefPSRleft,shDoubleQuote,shSingleQuote
- syn region shDerefPSRleft contained start='[^"']'
skip=@\%(\\\)*\/@ matchgroup=shDerefOp end='/' end='\ze}'
nextgroup=shDerefPSRright
+ " bash : ${parameter/#pattern/string}
+ " bash : ${parameter/%pattern/string}
+ syn match shDerefPSR contained '/[#%]'
nextgroup=shDerefPSRleft,shDoubleQuote,shSingleQuote
+ syn region shDerefPSRleft contained start='[^"']'
skip=@\%(\\\)*\/@ matchgroup=shDerefOp end='/' end='\ze}'
nextgroup=shDerefPSRright contains=shBracketExpr
syn region shDerefPSRright contained start='.'
skip=@\%(\\\)\+@ end='\ze}'
endif
@@ -670,6 +731,7 @@ syn sync match shWhileSync grouphere shRepeat
"\<while\>"
" =====================
if !exists("skip_sh_syntax_inits")
hi def link shArithRegion shShellVariables
+ hi def link shArrayValue shDeref
hi def link shAstQuote shDoubleQuote
hi def link shAtExpr shSetList
hi def link shBkslshSnglQuote shSingleQuote
@@ -764,7 +826,10 @@ if !exists("skip_sh_syntax_inits")
endif
hi def link shArithmetic Special
+ hi def link shBracketExprDelim Delimiter
hi def link shCharClass Identifier
+ hi def link shCollSymb shCharClass
+ hi def link shEqClass shCharClass
hi def link shSnglCase Statement
hi def link shCommandSub Special
hi def link shCommandSubBQ shCommandSub
@@ -814,6 +879,10 @@ delc ShFoldFunctions
delc ShFoldHereDoc
delc ShFoldIfDoFor
+" Delete the bracket expression function {{{1
+" ======================================
+delfun s:GenerateBracketExpressionItems
+
" Set Current Syntax: {{{1
" ===================
if exists("b:is_bash")
diff --git a/runtime/syntax/testdir/dumps/sh_04_01.dump
b/runtime/syntax/testdir/dumps/sh_04_01.dump
index 5a0ebe8f8..c536106c3 100644
--- a/runtime/syntax/testdir/dumps/sh_04_01.dump
+++ b/runtime/syntax/testdir/dumps/sh_04_01.dump
@@ -7,14 +7,14 @@
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+0#0000000&@39
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diff --git a/runtime/syntax/testdir/dumps/sh_12_00.dump
b/runtime/syntax/testdir/dumps/sh_12_00.dump
new file mode 100644
index 000000000..d2d99280e
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_00.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/sh_12_01.dump
b/runtime/syntax/testdir/dumps/sh_12_01.dump
new file mode 100644
index 000000000..fbc00826d
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_01.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/sh_12_02.dump
b/runtime/syntax/testdir/dumps/sh_12_02.dump
new file mode 100644
index 000000000..a2cfb6cb7
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_02.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_03.dump
b/runtime/syntax/testdir/dumps/sh_12_03.dump
new file mode 100644
index 000000000..e1e9af709
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_03.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_04.dump
b/runtime/syntax/testdir/dumps/sh_12_04.dump
new file mode 100644
index 000000000..535ca23d2
--- /dev/null
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diff --git a/runtime/syntax/testdir/dumps/sh_12_05.dump
b/runtime/syntax/testdir/dumps/sh_12_05.dump
new file mode 100644
index 000000000..9df4ef7b5
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_05.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_06.dump
b/runtime/syntax/testdir/dumps/sh_12_06.dump
new file mode 100644
index 000000000..ab66951a9
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_06.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_07.dump
b/runtime/syntax/testdir/dumps/sh_12_07.dump
new file mode 100644
index 000000000..d265221e8
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_07.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_08.dump
b/runtime/syntax/testdir/dumps/sh_12_08.dump
new file mode 100644
index 000000000..ddbabda70
--- /dev/null
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diff --git a/runtime/syntax/testdir/dumps/sh_12_09.dump
b/runtime/syntax/testdir/dumps/sh_12_09.dump
new file mode 100644
index 000000000..35ba1f8e1
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_09.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_10.dump
b/runtime/syntax/testdir/dumps/sh_12_10.dump
new file mode 100644
index 000000000..f6d8ca0a3
--- /dev/null
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+|:|
|[+0#00e0003&|!+8#e000e06&|[+0#0000000&|$|'|\|x|2|0|'|]+0#00e0003&|;+0#0000000&|
|:| |[+0#00e0003&|^+8#e000e06&|[+0#0000000&|"+0#af5f00255&|
+0#e000002&|"+0#af5f00255&|]+0#00e0003&|;+0#0000000&| |:|
|[+0#00e0003&|!+8#e000e06&|[+0#0000000&|'| |'|]+0#00e0003&|;+0#0000000&| |:|
|[+0#00e0003&|^+8#e000e06&|[+0#0000000&|\| |]+0#00e0003&|;+0#0000000&| |:|
|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|[+0#00e0003&|!+8#e000e06&|
+0#0000000&@8|]+0#00e0003&|}+0#e000e06&|"+0#af5f00255&| +0#0000000&@6
+@75
+@57|1|8|1|,|1| @8|9|3|%|
diff --git a/runtime/syntax/testdir/dumps/sh_12_11.dump
b/runtime/syntax/testdir/dumps/sh_12_11.dump
new file mode 100644
index 000000000..21edbc825
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_11.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@74
+|n+0#00e0e07&|l|=+0#0000000&|'+0#af5f00255&| +0#0000000&@70
+|'+0#af5f00255&| +0#0000000&@73
+|e+0#af5f00255&|c|h|o|
+0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|"+0#af5f00255&|$+0#e000e06&|{|n|l|}|"+0#af5f00255&|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&|;+0#0000000&|
|e+0#af5f00255&|c|h|o|
+0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|'+0#0000000&|$|{|n|l|}|'|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&|
+0#0000000&@14
+|e+0#af5f00255&|c|h|o|
+0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|\+0#0000000&|"|$|{|n|l|}|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&|;+0#0000000&|
|e+0#af5f00255&|c|h|o|
+0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|\+0#0000000&|'|$|{|n|l|}|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&|
+0#0000000&@14
+>e+0#af5f00255&|c|h|o|
+0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|$+0#0000000&|{|n|l|}|\|"|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&|;+0#0000000&|
|e+0#af5f00255&|c|h|o|
+0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|$+0#0000000&|{|n|l|}|\|'|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&|
+0#0000000&@14
+@75
+|b+0#00e0e07&|i|n|s|=+0#0000000&|(+0#e000e06&|)|;+0#0000000&|
|b+0#00e0e07&|i|n|s|=+0#0000000&|(+0#e000e06&|0+0#e000002&|
+0#0000000&|1+0#e000002&|)+0#e000e06&|;+0#0000000&| |e+0#af5f00255&|v|a|l|
+0#0000000&|b+0#00e0e07&|i|n|s|++0#0000000&|=|(+0#e000e06&|{|0+0#e000002&|.+0#0000000&@1|1+0#e000002&|}+0#e000e06&|)|
+0#0000000&@34
+|b+0#00e0e07&|i|n|s|[+0#e000e06&|0+0#e000002&|]+0#e000e06&|=+0#0000000&|0+0#e000002&|;+0#0000000&|
|b+0#00e0e07&|i|n|s|[+0#e000e06&|1+0#e000002&|]+0#e000e06&|=+0#0000000&|1+0#e000002&|;+0#0000000&|
|e+0#af5f00255&|v|a|l|
+0#0000000&|b+0#00e0e07&|i|n|s|++0#0000000&|=|(+0#e000e06&|\+0#0000000&|$+0#e000e06&|{|b|i|n|s|[|{|1+0#e000002&|.+0#0000000&@1|0+0#e000002&|}+0#e000e06&|]|}|)|;+0#0000000&|
|u+0#af5f00255&|n|s|e|t|
+0#00e0e07&|b|i|n|s|[+0#e000e06&|3+0#e000002&|]+0#e000e06&|
+0#00e0e07&|b|i|n|s|[+0#e000e06&|2+0#e000002&|]+0#e000e06&| +0#0000000&
+|b+0#00e0e07&|i|n|s|=+0#0000000&|(+0#e000e06&|[+0#00e0e07&|8+0#e000002&|#|0|]+0#00e0e07&|=+0#0000000&|$+0#e000e06&|(@1|2+0#e000002&|#|1|0@1|)+0#e000e06&@1|
+0#0000000&|[+0#00e0e07&|$+0#e000e06&|(@1|8+0#e000002&|#|1|)+0#e000e06&@1|]+0#00e0e07&|=+0#0000000&|$+0#e000e06&|(@1|2+0#e000002&|#|1|0|)+0#e000e06&@1|
+0#0000000&|[+0#00e0e07&|3+0#e000002&|]+0#00e0e07&|=+0#0000000&|$+0#e000e06&|{|b|i|n|s|[|2+0#e000002&|#|1|]+0#e000e06&|}|
+0#0000000&|$+0#e000e06&|{|b|i|n|s|[|0+0#e000002&|]+0#e000e06&|}|)|
+0#0000000&@2
+|(+0#e000e06&|e+0#af5f00255&|c|h|o|
+0#e000002&|s|u|m|[+0#e000e06&|$|(@1|b|i|n|s|[|1+0#e000002&|6|#|3|]+0#e000e06&|
|+| |b|i|n|s|[|8+0#e000002&|#|2|]+0#e000e06&| |+|
|b|i|n|s|[|2+0#e000002&|#|1|]+0#e000e06&| |+|
|b|i|n|s|[|0+0#e000002&|]+0#e000e06&|)@1|]|)| +0#0000000&@13
+|e+0#af5f00255&|v|a|l| +0#0000000&|u+0#af5f00255&|n|s|e|t|
+0#00e0e07&|b|i|n|s|[+0#e000e06&|{|0+0#e000002&|.+0#0000000&@1|$+0#e000e06&|(@1|$|{|#|b|i|n|s|[|*+0#0000000&|]+0#e000e06&|}|
|-| |1+0#e000002&|)+0#e000e06&@1|}|]| +0#0000000&@32
+|:| @73
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|1|9@1|,|1| @8|B|o|t|
diff --git a/runtime/syntax/testdir/input/sh_04.sh
b/runtime/syntax/testdir/input/sh_04.sh
index e9ec5fedb..150379060 100644
--- a/runtime/syntax/testdir/input/sh_04.sh
+++ b/runtime/syntax/testdir/input/sh_04.sh
@@ -20,8 +20,3 @@ Variable="${VariableB:=${VariableC:={Var3:=${Var4:-eng}}}}"
# This is OK
: ${VariableB:-${VariableC:-eng}}
: "${VariableB:-${VariableC:-eng}}"
-
-# First line is OK except its missing a closing "}",
-# so second line should have some error highlighting
-Variable=${VariableB:=${VariableC:={Var3:=${Var4:-eng}}}
-Variable=${VariableB:-${VariableC:-{Var3:=eng}}
diff --git a/runtime/syntax/testdir/input/sh_12.sh
b/runtime/syntax/testdir/input/sh_12.sh
new file mode 100644
index 000000000..dcfa55354
--- /dev/null
+++ b/runtime/syntax/testdir/input/sh_12.sh
@@ -0,0 +1,206 @@
+#!/bin/bash
+# VIM_TEST_SETUP highlight link shArrayValue Identifier
+# VIM_TEST_SETUP highlight link shBracketExprDelim Structure
+# VIM_TEST_SETUP highlight link shCharClass Todo
+# VIM_TEST_SETUP highlight link shRange CursorLine
+
+
+
+
+[[ ( "$1" == ?(-)+([0-9]) && "$1" =~ ^-?[[:digit:]]+$ &&
+'^?(-)+([[:digit:]])$' == "$2" && ! "^-?[0-9]+$" =~ "$2" ) ]] || :
+
+[ \( "$1" != "?(-)+([0-9])" -a "$1" != '?(-)+([[:digit:]])' \) ] &&
+[ \( "?(-)+([[:digit:]])" != "$2" -a '?(-)+([0-9])' != "$2" \) ] || :
+
+# Match "\[0\]\[0\]", "{0}{0}", etc.
+: [[{][0-9]*[]}][[{][[:digit:]]*[]}]
+: [\
+[{][0-9]*[]}][[{][[:digit:]]*[]}]
+: [[\
+{][0-9]*[]}][[{][[:digit:]]*[]}]
+: [[{\
+][0-9]*[]}][[{][[:digit:]]*[]}]
+: [[{]\
+[0-9]*[]}][[{][[:digit:]]*[]}]
+: [[{][\
+0-9]*[]}][[{][[:digit:]]*[]}]
+: [[{][0-9\
+]*[]}][[{][[:digit:]]*[]}]
+: [[{][0-9]\
+*[]}][[{][[:digit:]]*[]}]
+: [[{][0-9]*\
+[]}][[{][[:digit:]]*[]}]
+: [[{][0-9]*[]\
+}][[{][[:digit:]]*[]}]
+: [[{][0-9]*[]}\
+][[{][[:digit:]]*[]}]
+: [[{][0-9]*[]}]\
+[[{][[:digit:]]*[]}]
+: [[{][0-9]*[]}][\
+[{][[:digit:]]*[]}]
+: [[{][0-9]*[]}][[\
+{][[:digit:]]*[]}]
+: [[{][0-9]*[]}][[{\
+][[:digit:]]*[]}]
+: [[{][0-9]*[]}][[{]\
+[[:digit:]]*[]}]
+: [[{][0-9]*[]}][[{][\
+[:digit:]]*[]}]
+: [[{][0-9]*[]}][[{][[:digit:]\
+]*[]}]
+: [[{][0-9]*[]}][[{][[:digit:]]\
+*[]}]
+: [[{][0-9]*[]}][[{][[:digit:]]*\
+[]}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[]\
+}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[]}\
+]
+: [[{][0-9]*[]}][[{][[:digit:]]*[[.].]}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[\
+[.].]}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[[.].]\
+}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[[.].]}\
+]
+
+# Match "\[0\]\[0\]", "{0}{0}", etc.
+case "$1" in
+[[{][0-9]*[]}][[{][[:digit:]]*[]}]*) : [0-9]; : [!0-9]; : [^0-9];;
+[\
+[{][0-9]*[]}][[{][[:digit:]]*[]}]*) : [0123]; : [!0123]; : [^0123];;
+[[\
+{][0-9]*[]}][[{][[:digit:]]*[]}]*) : [1[.0.]]; : [![.0.]]; : [^[.0.]^];;
+[[{\
+][0-9]*[]}][[{][[:digit:]]*[]}]*) : [1[=0=]]; : [![=0=]!]; : [^[=0=]];;
+[[{]\
+[0-9]*[]}][[{][[:digit:]]*[]}]*) ;;
+[[{][\
+0-9]*[]}][[{][[:digit:]]*[]}]*) ;;
+[[{][0-9\
+]*[]}][[{][[:digit:]]*[]}]*) : ?[[:foo:]]?; : [![:foo:]]?; : ?[^[:foo:]];;
+[[{][0-9]\
+*[]}][[{][[:digit:]]*[]}]*) : [[:digit:]]; : [![:digit:]]; : [^[:digit:]];;
+[[{][0-9]*\
+[]}][[{][[:digit:]]*[]}]*) : "${1^[[:lower:]]}"; : "${1^^[a-z]}";;
+[[{][0-9]*[]\
+}][[{][[:digit:]]*[]}]*) : "${1,[[:upper:]]}"; : "${1,,[A-Z]}";;
+[[{][0-9]*[]}\
+][[{][[:digit:]]*[]}]*) ;;
+[[{][0-9]*[]}]\
+[[{][[:digit:]]*[]}]*) ;;
+[[{][0-9]*[]}][\
+[{][[:digit:]]*[]}]*) : "${1#[[:digit:]]}"; : "${1##[0-9]}";;
+[[{][0-9]*[]}][[\
+{][[:digit:]]*[]}]*) : "${1%[[:digit:]]}"; : "${1%%[0-9]}";;
+[[{][0-9]*[]}][[{\
+][[:digit:]]*[]}]*) : "${1/[][:digit:][]/[0-9]}"; : "${1//[]0-9[]/[0-9]}";;
+[[{][0-9]*[]}][[{]\
+[[:digit:]]*[]}]*) : "${1/#[][:digit:][]/[0-9]}"; : "${1/%[]0-9[]/[0-9]}";;
+[[{][0-9]*[]}][[{][\
+[:digit:]]*[]}]*) ;;
+[[{][0-9]*[]}][[{][[:digit:]\
+]*[]}]*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]\
+*[]}]*) : "${1#*[[.[.][.].]]}"; : "${1%[[.].][.[.]]*}"; : "${1#*" "[][]}";;
+[[{][0-9]*[]}][[{][[:digit:]]*\
+[]}]*) : "${1#*[[=[=][=]=]]}"; : "${1%[[=]=][=[=]]*}"; : "${1#*\ [!][]}";;
+[[{][0-9]*[]}][[{][[:digit:]]*[]\
+}]*) : "${1#*[!]]}"; : "${1#*[^]]}"; : "${1%[![]*}"; : "${1%[^[]*}";;
+[[{][0-9]*[]}][[{][[:digit:]]*[]}\
+]*) : "${1#*[!\]]}"; : "${1#*[^\]]}"; : "${1%[!\[]*}"; : "${1%[^\[]*}";;
+[[{][0-9]*[]}][[{][[:digit:]]*[]}]\
+*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]*[[.].]}]\
+*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]*[\
+[.].]}]*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]*[[.].]\
+}]*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]*[[.].]}\
+]*) ;;
+[!][:digit:][:xdigit:]\ [^[:lower:]![:upper:]]*) ;;
+[^][:digit:]0-9a-fA-F\ [![:lower:]^[:upper:]]*) ;;
+[!!] | [!![] | [!]!] | [!^] | [!^[] | [!]^]) ;;
+[^!] | [^![] | [^]!] | [^^] | [^^[] | [^]^]) ;;
+esac
+
+# Match "\[0\]\[0\]", "{0}{0}", etc.
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*\
+[[{][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[\
+[{][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[\
+{][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{\
+][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{]\
+[0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][\
+0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9\
+]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]\
+*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*\
+[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]\
+}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}\
+][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}]\
+[[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][\
+[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[\
+{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{\
+][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{]\
+[[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][\
+[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]\
+]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]\
+*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*\
+[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[]\
+}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[]}\
+]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[]}]\
+}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[[.].]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[\
+[.].]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[[.].]\
+}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[[.].]}]\
+}"
+
+: *[x[=[=][=]=]]; : [x[=]=][=[=]]*; : *[x[.[.][.].]]; : [x[.].][.[.]]*
+: *[[=[=]x[=]=]]; : [[=]=]x[=[=]]*; : *[[.[.]x[.].]]; : [[.].]x[.[.]]*
+: *[[=[=][=]=]x]; : [[=]=][=[=]x]*; : *[[.[.][.].]x]; : [[.].][.[.]x]*
+: [!]]; : [^]]; : [![]; : [^[]; : [!\]]; : [^\]]; : [!\[]; : [^\[]
+: [$'\x5b']; : [$'\x5d']; : []]; : [[]; : [\]]; : [\[]
+: [$'\x20'[]; : [" "[]; : [' '[]; : [\ []; : [\ \[]; : "${1#[ ]}"
+: [[$'\x20']; : [[" "]; : [[' ']; : [[\ ]; : [\[\ ]; : "${1#[ ]}"
+: [^$'\x20'[]; : [!" "[]; : [^' '[]; : [!\ []; : "${1#[^ ]}"
+: [![$'\x20']; : [^[" "]; : [![' ']; : [^[\ ]; : "${1#[! ]}"
+
+nl='
+'
+echo "${1#${1%%[!"${nl}"]*}}"; echo "${1#${1%%[!'${nl}']*}}"
+echo "${1#${1%%[!\"${nl}]*}}"; echo "${1#${1%%[!\'${nl}]*}}"
+echo "${1#${1%%[!${nl}\"]*}}"; echo "${1#${1%%[!${nl}\']*}}"
+
+bins=(); bins=(0 1); eval bins+=({0..1})
+bins[0]=0; bins[1]=1; eval bins+=(\${bins[{1..0}]}); unset bins[3] bins[2]
+bins=([8#0]=$((2#100)) [$((8#1))]=$((2#10)) [3]=${bins[2#1]} ${bins[0]})
+(echo sum[$((bins[16#3] + bins[8#2] + bins[2#1] + bins[0]))])
+eval unset bins[{0..$((${#bins[*]} - 1))}]
+:
--
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