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" Vim indent file
" Language: Julia
" Maintainer: Carlo Baldassi <carlobaldassi@gmail.com>
" Homepage: https://github.com/JuliaEditorSupport/julia-vim
" Last Change: 2022 Jun 14
" 2023 Aug 28 by Vim Project (undo_indent)
" Notes: originally based on Bram Moolenaar's indent file for vim
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal autoindent
setlocal indentexpr=GetJuliaIndent()
setlocal indentkeys+==end,=else,=catch,=finally,),],}
setlocal indentkeys-=0#
setlocal indentkeys-=:
setlocal indentkeys-=0{
setlocal indentkeys-=0}
setlocal nosmartindent
let b:undo_indent = "setl ai< inde< indk< si<"
" Only define the function once.
if exists("*GetJuliaIndent")
finish
endif
let s:skipPatternsBasic = '\<julia\%(Comment\%([LM]\|Delim\)\)\>'
let s:skipPatterns = '\<julia\%(Comprehension\%(For\|If\)\|RangeKeyword\|Comment\%([LM]\|Delim\)\|\%([bs]\|Shell\|Printf\|Doc\)\?String\|StringPrefixed\|DocStringM\(Raw\)\?\|RegEx\|SymbolS\?\|Macro\|Dotted\)\>'
function JuliaMatch(lnum, str, regex, st, ...)
let s = a:st
let e = a:0 > 0 ? a:1 : -1
let basic_skip = a:0 > 1 ? a:2 : 'all'
let skip = basic_skip ==# 'basic' ? s:skipPatternsBasic : s:skipPatterns
while 1
let f = match(a:str, '\C' . a:regex, s)
if e >= 0 && f >= e
return -1
endif
if f >= 0
let attr = synIDattr(synID(a:lnum,f+1,1),"name")
let attrT = synIDattr(synID(a:lnum,f+1,0),"name")
if attr =~# skip || attrT =~# skip
let s = f+1
continue
endif
endif
break
endwhile
return f
endfunction
function GetJuliaNestingStruct(lnum, ...)
" Auxiliary function to inspect the block structure of a line
let line = getline(a:lnum)
let s = a:0 > 0 ? a:1 : 0
let e = a:0 > 1 ? a:2 : -1
let blocks_stack = []
let num_closed_blocks = 0
while 1
let fb = JuliaMatch(a:lnum, line, '\<\%(if\|else\%(if\)\?\|while\|for\|try\|catch\|finally\|\%(staged\)\?function\|macro\|begin\|mutable\s\+struct\|\%(mutable\s\+\)\@<!struct\|\%(abstract\|primitive\)\s\+type\|let\|\%(bare\)\?module\|quote\|do\)\>', s, e)
let fe = JuliaMatch(a:lnum, line, '\<end\>', s, e)
if fb < 0 && fe < 0
" No blocks found
break
end
if fb >= 0 && (fb < fe || fe < 0)
" The first occurrence is an opening block keyword
" Note: some keywords (elseif,else,catch,finally) are both
" closing blocks and opening new ones
let i = JuliaMatch(a:lnum, line, '\<if\>', s)
if i >= 0 && i == fb
let s = i+1
call add(blocks_stack, 'if')
continue
endif
let i = JuliaMatch(a:lnum, line, '\<elseif\>', s)
if i >= 0 && i == fb
let s = i+1
if len(blocks_stack) > 0 && blocks_stack[-1] == 'if'
let blocks_stack[-1] = 'elseif'
elseif (len(blocks_stack) > 0 && blocks_stack[-1] != 'elseif') || len(blocks_stack) == 0
call add(blocks_stack, 'elseif')
let num_closed_blocks += 1
endif
continue
endif
let i = JuliaMatch(a:lnum, line, '\<else\>', s)
if i >= 0 && i == fb
let s = i+1
if len(blocks_stack) > 0 && blocks_stack[-1] =~# '\<\%(else\)\=if\>'
let blocks_stack[-1] = 'else'
else
call add(blocks_stack, 'else')
let num_closed_blocks += 1
endif
continue
endif
let i = JuliaMatch(a:lnum, line, '\<try\>', s)
if i >= 0 && i == fb
let s = i+1
call add(blocks_stack, 'try')
continue
endif
let i = JuliaMatch(a:lnum, line, '\<catch\>', s)
if i >= 0 && i == fb
let s = i+1
if len(blocks_stack) > 0 && blocks_stack[-1] == 'try'
let blocks_stack[-1] = 'catch'
else
call add(blocks_stack, 'catch')
let num_closed_blocks += 1
endif
continue
endif
let i = JuliaMatch(a:lnum, line, '\<finally\>', s)
if i >= 0 && i == fb
let s = i+1
if len(blocks_stack) > 0 && (blocks_stack[-1] == 'try' || blocks_stack[-1] == 'catch')
let blocks_stack[-1] = 'finally'
else
call add(blocks_stack, 'finally')
let num_closed_blocks += 1
endif
continue
endif
let i = JuliaMatch(a:lnum, line, '\<\%(bare\)\?module\>', s)
if i >= 0 && i == fb
let s = i+1
if i == 0
call add(blocks_stack, 'col1module')
else
call add(blocks_stack, 'other')
endif
continue
endif
let i = JuliaMatch(a:lnum, line, '\<\%(while\|for\|function\|macro\|begin\|\%(mutable\s\+\)\?struct\|\%(abstract\|primitive\)\s\+type\|let\|quote\|do\)\>', s)
if i >= 0 && i == fb
if match(line, '\C\<\%(mutable\|abstract\|primitive\)', i) != -1
let s = i+11
else
let s = i+1
endif
call add(blocks_stack, 'other')
continue
endif
" Note: it should be impossible to get here
break
else
" The first occurrence is an 'end'
let s = fe+1
if len(blocks_stack) == 0
let num_closed_blocks += 1
else
call remove(blocks_stack, -1)
endif
continue
endif
" Note: it should be impossible to get here
break
endwhile
let num_open_blocks = len(blocks_stack) - count(blocks_stack, 'col1module')
return [num_open_blocks, num_closed_blocks]
endfunction
function GetJuliaNestingBrackets(lnum, c)
" Auxiliary function to inspect the brackets structure of a line
let line = getline(a:lnum)[0 : (a:c - 1)]
let s = 0
let brackets_stack = []
let last_closed_bracket = -1
while 1
let fb = JuliaMatch(a:lnum, line, '[([{]', s)
let fe = JuliaMatch(a:lnum, line, '[])}]', s)
if fb < 0 && fe < 0
" No brackets found
break
end
if fb >= 0 && (fb < fe || fe < 0)
" The first occurrence is an opening bracket
let i = JuliaMatch(a:lnum, line, '(', s)
if i >= 0 && i == fb
let s = i+1
call add(brackets_stack, ['par',i])
continue
endif
let i = JuliaMatch(a:lnum, line, '\[', s)
if i >= 0 && i == fb
let s = i+1
call add(brackets_stack, ['sqbra',i])
continue
endif
let i = JuliaMatch(a:lnum, line, '{', s)
if i >= 0 && i == fb
let s = i+1
call add(brackets_stack, ['curbra',i])
continue
endif
" Note: it should be impossible to get here
break
else
" The first occurrence is a closing bracket
let i = JuliaMatch(a:lnum, line, ')', s)
if i >= 0 && i == fe
let s = i+1
if len(brackets_stack) > 0 && brackets_stack[-1][0] == 'par'
call remove(brackets_stack, -1)
else
let last_closed_bracket = i + 1
endif
continue
endif
let i = JuliaMatch(a:lnum, line, ']', s)
if i >= 0 && i == fe
let s = i+1
if len(brackets_stack) > 0 && brackets_stack[-1][0] == 'sqbra'
call remove(brackets_stack, -1)
else
let last_closed_bracket = i + 1
endif
continue
endif
let i = JuliaMatch(a:lnum, line, '}', s)
if i >= 0 && i == fe
let s = i+1
if len(brackets_stack) > 0 && brackets_stack[-1][0] == 'curbra'
call remove(brackets_stack, -1)
else
let last_closed_bracket = i + 1
endif
continue
endif
" Note: it should be impossible to get here
break
endif
" Note: it should be impossible to get here
break
endwhile
let first_open_bracket = -1
let last_open_bracket = -1
let infuncargs = 0
if len(brackets_stack) > 0
let first_open_bracket = brackets_stack[0][1]
let last_open_bracket = brackets_stack[-1][1]
if brackets_stack[-1][0] == 'par' && IsFunctionArgPar(a:lnum, last_open_bracket+1)
let infuncargs = 1
endif
endif
return [first_open_bracket, last_open_bracket, last_closed_bracket, infuncargs]
endfunction
let s:bracketBlocks = '\<julia\%(\%(\%(Printf\)\?Par\|SqBra\%(Idx\)\?\|CurBra\)Block\|ParBlockInRange\|StringVars\%(Par\|SqBra\|CurBra\)\|Dollar\%(Par\|SqBra\)\|QuotedParBlockS\?\)\>'
function IsInBrackets(lnum, c)
let stack = map(synstack(a:lnum, a:c), 'synIDattr(v:val, "name")')
call filter(stack, 'v:val =~# s:bracketBlocks')
return len(stack) > 0
endfunction
function IsInDocString(lnum)
let stack = map(synstack(a:lnum, 1), 'synIDattr(v:val, "name")')
call filter(stack, 'v:val =~# "\\<juliaDocString\\(Delim\\|M\\\(Raw\\)\\?\\)\\?\\>"')
return len(stack) > 0
endfunction
function IsInContinuationImportLine(lnum)
let stack = map(synstack(a:lnum, 1), 'synIDattr(v:val, "name")')
call filter(stack, 'v:val =~# "\\<juliaImportLine\\>"')
if len(stack) == 0
return 0
endif
return JuliaMatch(a:lnum, getline(a:lnum), '\<\%(import\|using\|export\)\>', indent(a:lnum)) == -1
endfunction
function IsFunctionArgPar(lnum, c)
if a:c == 0
return 0
endif
let stack = map(synstack(a:lnum, a:c-1), 'synIDattr(v:val, "name")')
return len(stack) >= 2 && stack[-2] ==# 'juliaFunctionDef'
endfunction
function JumpToMatch(lnum, last_closed_bracket)
" we use the % command to skip back (tries to use matchit if possible,
" otherwise resorts to vim's default, which is buggy but better than
" nothing)
call cursor(a:lnum, a:last_closed_bracket)
let percmap = maparg("%", "n")
if exists("g:loaded_matchit") && percmap =~# 'Match\%(it\|_wrapper\)'
normal %
else
normal! %
end
endfunction
" Auxiliary function to find a line which does not start in the middle of a
" multiline bracketed expression, to be used as reference for block
" indentation.
function LastBlockIndent(lnum)
let lnum = a:lnum
let ind = 0
while lnum > 0
let ind = indent(lnum)
if ind == 0
return [lnum, 0]
endif
if !IsInBrackets(lnum, 1)
break
endif
let lnum = prevnonblank(lnum - 1)
endwhile
return [max([lnum,1]), ind]
endfunction
function GetJuliaIndent()
" Do not alter doctrings indentation
if IsInDocString(v:lnum)
return -1
endif
" Find a non-blank line above the current line.
let lnum = prevnonblank(v:lnum - 1)
" At the start of the file use zero indent.
if lnum == 0
return 0
endif
let ind = -1
let st = -1
let lim = -1
" Multiline bracketed expressions take precedence
let align_brackets = get(g:, "julia_indent_align_brackets", 1)
let align_funcargs = get(g:, "julia_indent_align_funcargs", 0)
let c = len(getline(lnum)) + 1
while IsInBrackets(lnum, c)
let [first_open_bracket, last_open_bracket, last_closed_bracket, infuncargs] = GetJuliaNestingBrackets(lnum, c)
" First scenario: the previous line has a hanging open bracket:
" set the indentation to match the opening bracket (plus an extra space)
" unless we're in a function arguments list or alignment is disabled, in
" which case we just add an extra indent
if last_open_bracket != -1
if (!infuncargs && align_brackets) || (infuncargs && align_funcargs)
let st = last_open_bracket
let ind = virtcol([lnum, st + 1])
else
let ind = indent(lnum) + shiftwidth()
endif
" Second scenario: some multiline bracketed expression was closed in the
" previous line. But since we know we are still in a bracketed expression,
" we need to find the line where the bracket was opened
elseif last_closed_bracket != -1
call JumpToMatch(lnum, last_closed_bracket)
if line(".") == lnum
" something wrong here, give up
let ind = indent(lnum)
else
let lnum = line(".")
let c = col(".") - 1
if c == 0
" uhm, give up
let ind = 0
else
" we skipped a bracket set, keep searching for an opening bracket
let lim = c
continue
endif
endif
" Third scenario: nothing special: keep the indentation
else
let ind = indent(lnum)
endif
" Does the current line start with a closing bracket? Then depending on
" the situation we align it with the opening one, or we let the rest of
" the code figure it out (the case in which we're closing a function
" argument list is special-cased)
if JuliaMatch(v:lnum, getline(v:lnum), '[])}]', indent(v:lnum)) == indent(v:lnum) && ind > 0
if !align_brackets && !align_funcargs
call JumpToMatch(v:lnum, indent(v:lnum))
return indent(line("."))
elseif (align_brackets && getline(v:lnum)[indent(v:lnum)] != ')') || align_funcargs
return ind - 1
else " must be a ')' and align_brackets==1 and align_funcargs==0
call JumpToMatch(v:lnum, indent(v:lnum))
if IsFunctionArgPar(line("."), col("."))
let ind = -1
else
return ind - 1
endif
endif
endif
break
endwhile
if ind == -1
" We are not in a multiline bracketed expression. Thus we look for a
" previous line to use as a reference
let [lnum,ind] = LastBlockIndent(lnum)
let c = len(getline(lnum)) + 1
if IsInBrackets(lnum, c)
let [first_open_bracket, last_open_bracket, last_closed_bracket, infuncargs] = GetJuliaNestingBrackets(lnum, c)
let lim = first_open_bracket
endif
end
" Analyse the reference line
let [num_open_blocks, num_closed_blocks] = GetJuliaNestingStruct(lnum, st, lim)
" Increase indentation for each newly opened block in the reference line
let ind += shiftwidth() * num_open_blocks
" Analyse the current line
let [num_open_blocks, num_closed_blocks] = GetJuliaNestingStruct(v:lnum)
" Decrease indentation for each closed block in the current line
let ind -= shiftwidth() * num_closed_blocks
" Additional special case: multiline import/using/export statements
let prevline = getline(lnum)
" Are we in a multiline import/using/export statement, right below the
" opening line?
if IsInContinuationImportLine(v:lnum) && !IsInContinuationImportLine(lnum)
if get(g:, 'julia_indent_align_import', 1)
" if the opening line has a colon followed by non-comments, use it as
" reference point
let cind = JuliaMatch(lnum, prevline, ':', indent(lnum), lim)
if cind >= 0
let nonwhiteind = JuliaMatch(lnum, prevline, '\S', cind+1, -1, 'basic')
if nonwhiteind >= 0
" return match(prevline, '\S', cind+1) " a bit overkill...
return cind + 2
endif
else
" if the opening line is not a naked import/using/export statement, use
" it as reference
let iind = JuliaMatch(lnum, prevline, '\<import\|using\|export\>', indent(lnum), lim)
if iind >= 0
" assuming whitespace after using... so no `using(XYZ)` please!
let nonwhiteind = JuliaMatch(lnum, prevline, '\S', iind+6, -1, 'basic')
if nonwhiteind >= 0
return match(prevline, '\S', iind+6)
endif
endif
endif
endif
let ind += shiftwidth()
" Or did we just close a multiline import/using/export statement?
elseif !IsInContinuationImportLine(v:lnum) && IsInContinuationImportLine(lnum)
" find the starting line of the statement
let ilnum = 0
for iln in range(lnum-1, 1, -1)
if !IsInContinuationImportLine(iln)
let ilnum = iln
break
endif
endfor
if ilnum == 0
" something went horribly wrong, give up
let ind = indent(lnum)
endif
let ind = indent(ilnum)
endif
return ind
endfunction