mirror of
https://github.com/inkarkat/vim-ingo-library.git
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Ingo Karkat
d9644ec9de
These regexp atoms so far had been left out of the conversion to quasi-literal text.
201 lines
7.5 KiB
VimL
201 lines
7.5 KiB
VimL
" ingo/regexp/parse.vim: Functions around parsing patterns.
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"
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" DEPENDENCIES:
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"
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" Copyright: (C) 2020 Ingo Karkat
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" The VIM LICENSE applies to this script; see ':help copyright'.
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"
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" Maintainer: Ingo Karkat <ingo@karkat.de>
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function! ingo#regexp#parse#MultiExpr()
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches any multi.
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"* ASSUMPTIONS / PRECONDITIONS:
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" None.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return '\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\%(\*\|\\[+=?]\|\\{-\?\d*,\?\d*}\|\\@\%(>\|=\|!\|<=\|<!\)\)'
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endfunction
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function! ingo#regexp#parse#PositionAtomExpr() abort
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches any position atom.
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"* ASSUMPTIONS / PRECONDITIONS:
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" Does not consider "very magic" (/\v)-style syntax. If you may have this,
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" convert via ingo#regexp#magic#Normalize() first.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return '\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\%(\\\%([\^<>]\|_\^\|_\$\|%[\^$V#]\|%[<>]\?''.\|%[<>]\?\d\+[lcv]\)\|[\^$]\)'
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endfunction
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function! ingo#regexp#parse#NumberEscapesExpr() abort
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches any numbered escape; i.e. \%d; cp.
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" |E678|.
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"* ASSUMPTIONS / PRECONDITIONS:
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" Does not consider "very magic" (/\v)-style syntax. If you may have this,
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" convert via ingo#regexp#magic#Normalize() first.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return '\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\\%\%(d\%(\d\+\)\|o\%(\o\+\)\|x\%(\x\{1,2}\)\|u\%(\x\{1,4}\)\|U\%(\x\{1,8}\)\)'
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endfunction
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function! ingo#regexp#parse#CharacterClassesExpr() abort
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches any character class; i.e. \w; cp.
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" |whitespace|.
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"* ASSUMPTIONS / PRECONDITIONS:
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" Does not consider "very magic" (/\v)-style syntax. If you may have this,
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" convert via ingo#regexp#magic#Normalize() first.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return '\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\\_\?\([iIkKfFpPsSdDxXoOwWhHaAlLuU]\)'
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endfunction
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function! ingo#regexp#parse#OptionalSequenceExpr() abort
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches an optional sequence |/\%[|,
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" capturing the atoms inside [...].
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"* ASSUMPTIONS / PRECONDITIONS:
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" Does not consider "very magic" (/\v)-style syntax. If you may have this,
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" convert via ingo#regexp#magic#Normalize() first.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return '\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\\%\[\(\%(\[\[\]\|\[\]\]\|[^][]\|' . ingo#regexp#collection#Expr({'isBarePattern': 1}) . '\)\+\)\]'
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endfunction
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function! ingo#regexp#parse#GroupBranchExpr() abort
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches any grouping or branching element:
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" \%(, \(, \|, \).
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"* ASSUMPTIONS / PRECONDITIONS:
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" Does not consider "very magic" (/\v)-style syntax. If you may have this,
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" convert via ingo#regexp#magic#Normalize() first.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return '\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\\\%(%\?(\|[|)]\)'
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endfunction
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function! ingo#regexp#parse#SingleCharacterExpr() abort
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches any unspecific single character,
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" i.e. . or \_..
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"* ASSUMPTIONS / PRECONDITIONS:
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" Does not consider "very magic" (/\v)-style syntax. If you may have this,
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" convert via ingo#regexp#magic#Normalize() first.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return '\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\%(\.\|\\_\.\)'
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endfunction
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function! ingo#regexp#parse#EscapedCharacterExpr() abort
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches any escaped characters: \e, \n,
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" etc.
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"* ASSUMPTIONS / PRECONDITIONS:
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" Does not consider "very magic" (/\v)-style syntax. If you may have this,
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" convert via ingo#regexp#magic#Normalize() first.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return '\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\\\([etrbn]\)'
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endfunction
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function! ingo#regexp#parse#OtherAtomExpr() abort
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches any non-ordinary (i.e. not a
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" literal or escaped character) atom that isn't already matched by one of the
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" other atom expressions here.
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"* ASSUMPTIONS / PRECONDITIONS:
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" Does not consider "very magic" (/\v)-style syntax. If you may have this,
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" convert via ingo#regexp#magic#Normalize() first.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return '^\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\\%#=[012]\|\%(\%(^\|[^\\]\)\%(\\\\\)*\\\)\@<!\\\%(zs\|ze\|[&123456789cCzmMvV]\)'
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endfunction
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function! ingo#regexp#parse#NonOrdinaryAtomExpr() abort
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"******************************************************************************
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"* PURPOSE:
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" Return a regular expression that matches any non-ordinary (i.e. not a
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" literal character) atom, such as branches, multis, positions, collections,
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" escapes.
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"* ASSUMPTIONS / PRECONDITIONS:
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" Does not consider "very magic" (/\v)-style syntax. If you may have this,
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" convert via ingo#regexp#magic#Normalize() first.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" None.
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"* RETURN VALUES:
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" Regular expression.
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"******************************************************************************
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return join([
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\ ingo#regexp#parse#GroupBranchExpr(),
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\ ingo#regexp#parse#MultiExpr(),
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\ ingo#regexp#parse#EscapedCharacterExpr(),
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\ ingo#regexp#parse#OtherAtomExpr(),
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\ ingo#regexp#parse#PositionAtomExpr(),
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\ ingo#regexp#parse#SingleCharacterExpr(),
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\ ingo#regexp#parse#OptionalSequenceExpr(),
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\ ingo#regexp#collection#Expr(),
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\ ingo#regexp#parse#CharacterClassesExpr(),
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\ ingo#regexp#parse#NumberEscapesExpr()
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\], '\|')
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endfunction
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" vim: set ts=8 sts=4 sw=4 noexpandtab ff=unix fdm=syntax :
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