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-
-" Vim Compiler File
-" Compiler: GHC
-" Maintainer: Claus Reinke <claus.reinke@talk21.com>
-" Last Change: 22/06/2010
-"
-" part of haskell plugins: http://projects.haskell.org/haskellmode-vim
-
-" ------------------------------ paths & quickfix settings first
-"
-
-if exists("current_compiler") && current_compiler == "ghc"
- finish
-endif
-let current_compiler = "ghc"
-
-let s:scriptname = "ghc.vim"
-
-if !haskellmode#GHC() | finish | endif
-if (!exists("b:ghc_staticoptions"))
- let b:ghc_staticoptions = ''
-endif
-
-" set makeprg (for quickfix mode)
-execute 'setlocal makeprg=' . g:ghc . '\ ' . escape(b:ghc_staticoptions,' ') .'\ -e\ :q\ %'
-"execute 'setlocal makeprg=' . g:ghc .'\ -e\ :q\ %'
-"execute 'setlocal makeprg=' . g:ghc .'\ --make\ %'
-
-" quickfix mode:
-" fetch file/line-info from error message
-" TODO: how to distinguish multiline errors from warnings?
-" (both have the same header, and errors have no common id-tag)
-" how to get rid of first empty message in result list?
-setlocal errorformat=
- \%-Z\ %#,
- \%W%f:%l:%c:\ Warning:\ %m,
- \%E%f:%l:%c:\ %m,
- \%E%>%f:%l:%c:,
- \%+C\ \ %#%m,
- \%W%>%f:%l:%c:,
- \%+C\ \ %#%tarning:\ %m,
-
-" oh, wouldn't you guess it - ghc reports (partially) to stderr..
-setlocal shellpipe=2>
-
-" ------------------------- but ghc can do a lot more for us..
-"
-
-" allow map leader override
-if !exists("maplocalleader")
- let maplocalleader='_'
-endif
-
-" initialize map of identifiers to their types
-" associate type map updates to changedtick
-if !exists("b:ghc_types")
- let b:ghc_types = {}
- let b:my_changedtick = b:changedtick
-endif
-
-if exists("g:haskell_functions")
- finish
-endif
-let g:haskell_functions = "ghc"
-
-" avoid hit-enter prompts
-set cmdheight=3
-
-" edit static GHC options
-" TODO: add completion for options/packages?
-command! GHCStaticOptions call GHC_StaticOptions()
-function! GHC_StaticOptions()
- let b:ghc_staticoptions = input('GHC static options: ',b:ghc_staticoptions)
- execute 'setlocal makeprg=' . g:ghc . '\ ' . escape(b:ghc_staticoptions,' ') .'\ -e\ :q\ %'
- let b:my_changedtick -=1
-endfunction
-
-map <LocalLeader>T :call GHC_ShowType(1)<cr>
-map <LocalLeader>t :call GHC_ShowType(0)<cr>
-function! GHC_ShowType(addTypeDecl)
- let namsym = haskellmode#GetNameSymbol(getline('.'),col('.'),0)
- if namsym==[]
- redraw
- echo 'no name/symbol under cursor!'
- return 0
- endif
- let [_,symb,qual,unqual] = namsym
- let name = qual=='' ? unqual : qual.'.'.unqual
- let pname = ( symb ? '('.name.')' : name )
- call GHC_HaveTypes()
- if !has_key(b:ghc_types,name)
- redraw
- echo pname "type not known"
- else
- redraw
- for type in split(b:ghc_types[name],' -- ')
- echo pname "::" type
- if a:addTypeDecl
- call append( line(".")-1, pname . " :: " . type )
- endif
- endfor
- endif
-endfunction
-
-" show type of identifier under mouse pointer in balloon
-" TODO: it isn't a good idea to tie potentially time-consuming tasks
-" (querying GHCi for the types) to cursor movements (#14). Currently,
-" we ask the user to call :GHCReload explicitly. Should there be an
-" option to reenable the old implicit querying?
-if has("balloon_eval")
- set ballooneval
- set balloondelay=600
- set balloonexpr=GHC_TypeBalloon()
- function! GHC_TypeBalloon()
- if exists("b:current_compiler") && b:current_compiler=="ghc"
- let [line] = getbufline(v:beval_bufnr,v:beval_lnum)
- let namsym = haskellmode#GetNameSymbol(line,v:beval_col,0)
- if namsym==[]
- return ''
- endif
- let [start,symb,qual,unqual] = namsym
- let name = qual=='' ? unqual : qual.'.'.unqual
- let pname = name " ( symb ? '('.name.')' : name )
- if b:ghc_types == {}
- redraw
- echo "no type information (try :GHGReload)"
- elseif (b:my_changedtick != b:changedtick)
- redraw
- echo "type information may be out of date (try :GHGReload)"
- endif
- " silent call GHC_HaveTypes()
- if b:ghc_types!={}
- if has("balloon_multiline")
- return (has_key(b:ghc_types,pname) ? split(b:ghc_types[pname],' -- ') : '')
- else
- return (has_key(b:ghc_types,pname) ? b:ghc_types[pname] : '')
- endif
- else
- return ''
- endif
- else
- return ''
- endif
- endfunction
-endif
-
-map <LocalLeader>si :call GHC_ShowInfo()<cr>
-function! GHC_ShowInfo()
- let namsym = haskellmode#GetNameSymbol(getline('.'),col('.'),0)
- if namsym==[]
- redraw
- echo 'no name/symbol under cursor!'
- return 0
- endif
- let [_,symb,qual,unqual] = namsym
- let name = qual=='' ? unqual : (qual.'.'.unqual)
- let output = GHC_Info(name)
- pclose | new
- setlocal previewwindow
- setlocal buftype=nofile
- setlocal noswapfile
- put =output
- wincmd w
- "redraw
- "echo output
-endfunction
-
-" fill the type map, unless nothing has changed since the last attempt
-function! GHC_HaveTypes()
- if b:ghc_types == {} && (b:my_changedtick != b:changedtick)
- let b:my_changedtick = b:changedtick
- return GHC_BrowseAll()
- endif
-endfunction
-
-" update b:ghc_types after successful make
-au QuickFixCmdPost make if GHC_CountErrors()==0 | silent call GHC_BrowseAll() | endif
-
-" count only error entries in quickfix list, ignoring warnings
-function! GHC_CountErrors()
- let c=0
- for e in getqflist() | if e.type=='E' && e.text !~ "^[ \n]*Warning:" | let c+=1 | endif | endfor
- return c
-endfunction
-
-command! GHCReload call GHC_BrowseAll()
-function! GHC_BrowseAll()
- " let imports = haskellmode#GatherImports()
- " let modules = keys(imports[0]) + keys(imports[1])
- let b:my_changedtick = b:changedtick
- let imports = {} " no need for them at the moment
- let current = GHC_NameCurrent()
- let module = current==[] ? 'Main' : current[0]
- if haskellmode#GHC_VersionGE([6,8,1])
- return GHC_BrowseBangStar(module)
- else
- return GHC_BrowseMultiple(imports,['*'.module])
- endif
-endfunction
-
-function! GHC_NameCurrent()
- let last = line("$")
- let l = 1
- while l<last
- let ml = matchlist( getline(l), '^module\s*\([^ (]*\)')
- if ml != []
- let [_,module;x] = ml
- return [module]
- endif
- let l += 1
- endwhile
- redraw
- echo "cannot find module header for file " . expand("%")
- return []
-endfunction
-
-function! GHC_BrowseBangStar(module)
- redraw
- echo "browsing module " a:module
- let command = ":browse! *" . a:module
- let orig_shellredir = &shellredir
- let &shellredir = ">" " ignore error/warning messages, only output or lack of it
- let output = system(g:ghc . ' ' . b:ghc_staticoptions . ' -v0 --interactive ' . expand("%") , command )
- let &shellredir = orig_shellredir
- return GHC_ProcessBang(a:module,output)
-endfunction
-
-function! GHC_BrowseMultiple(imports,modules)
- redraw
- echo "browsing modules " a:modules
- let command = ":browse " . join( a:modules, " \n :browse ")
- let command = substitute(command,'\(:browse \(\S*\)\)','putStrLn "-- \2" \n \1','g')
- let output = system(g:ghc . ' ' . b:ghc_staticoptions . ' -v0 --interactive ' . expand("%") , command )
- return GHC_Process(a:imports,output)
-endfunction
-
-function! GHC_Info(what)
- " call GHC_HaveTypes()
- let output = system(g:ghc . ' ' . b:ghc_staticoptions . ' -v0 --interactive ' . expand("%"), ":info ". a:what)
- return output
-endfunction
-
-function! GHC_ProcessBang(module,output)
- let module = a:module
- let b = a:output
- let linePat = '^\(.\{-}\)\n\(.*\)'
- let contPat = '\s\+\(.\{-}\)\n\(.*\)'
- let typePat = '^\(\)\(\S*\)\s*::\(.*\)'
- let commentPat = '^-- \(\S*\)'
- let definedPat = '^-- defined locally'
- let importedPat = '^-- imported via \(.*\)'
- if !(b=~commentPat)
- echo s:scriptname.": GHCi reports errors (try :make?)"
- return 0
- endif
- let b:ghc_types = {}
- let ml = matchlist( b , linePat )
- while ml != []
- let [_,l,rest;x] = ml
- let mlDecl = matchlist( l, typePat )
- if mlDecl != []
- let [_,indent,id,type;x] = mlDecl
- let ml2 = matchlist( rest , '^'.indent.contPat )
- while ml2 != []
- let [_,c,rest;x] = ml2
- let type .= c
- let ml2 = matchlist( rest , '^'.indent.contPat )
- endwhile
- let id = substitute( id, '^(\(.*\))$', '\1', '')
- let type = substitute( type, '\s\+', " ", "g" )
- " using :browse! *<current>, we get both unqualified and qualified ids
- let qualified = (id =~ '\.') && (id =~ '[A-Z]')
- let b:ghc_types[id] = type
- if !qualified
- for qual in qualifiers
- let b:ghc_types[qual.'.'.id] = type
- endfor
- endif
- else
- let mlImported = matchlist( l, importedPat )
- let mlDefined = matchlist( l, definedPat )
- if mlImported != []
- let [_,modules;x] = mlImported
- let qualifiers = split( modules, ', ' )
- elseif mlDefined != []
- let qualifiers = [module]
- endif
- endif
- let ml = matchlist( rest , linePat )
- endwhile
- return 1
-endfunction
-
-function! GHC_Process(imports,output)
- let b = a:output
- let imports = a:imports
- let linePat = '^\(.\{-}\)\n\(.*\)'
- let contPat = '\s\+\(.\{-}\)\n\(.*\)'
- let typePat = '^\(\s*\)\(\S*\)\s*::\(.*\)'
- let modPat = '^-- \(\S*\)'
- " add '-- defined locally' and '-- imported via ..'
- if !(b=~modPat)
- echo s:scriptname.": GHCi reports errors (try :make?)"
- return 0
- endif
- let b:ghc_types = {}
- let ml = matchlist( b , linePat )
- while ml != []
- let [_,l,rest;x] = ml
- let mlDecl = matchlist( l, typePat )
- if mlDecl != []
- let [_,indent,id,type;x] = mlDecl
- let ml2 = matchlist( rest , '^'.indent.contPat )
- while ml2 != []
- let [_,c,rest;x] = ml2
- let type .= c
- let ml2 = matchlist( rest , '^'.indent.contPat )
- endwhile
- let id = substitute(id, '^(\(.*\))$', '\1', '')
- let type = substitute( type, '\s\+', " ", "g" )
- " using :browse *<current>, we get both unqualified and qualified ids
- if current_module " || has_key(imports[0],module)
- if has_key(b:ghc_types,id) && !(matchstr(b:ghc_types[id],escape(type,'[].'))==type)
- let b:ghc_types[id] .= ' -- '.type
- else
- let b:ghc_types[id] = type
- endif
- endif
- if 0 " has_key(imports[1],module)
- let qualid = module.'.'.id
- let b:ghc_types[qualid] = type
- endif
- else
- let mlMod = matchlist( l, modPat )
- if mlMod != []
- let [_,module;x] = mlMod
- let current_module = module[0]=='*'
- let module = current_module ? module[1:] : module
- endif
- endif
- let ml = matchlist( rest , linePat )
- endwhile
- return 1
-endfunction
-
-let s:ghc_templates = ["module _ () where","class _ where","class _ => _ where","instance _ where","instance _ => _ where","type family _","type instance _ = ","data _ = ","newtype _ = ","type _ = "]
-
-" use ghci :browse index for insert mode omnicompletion (CTRL-X CTRL-O)
-function! GHC_CompleteImports(findstart, base)
- if a:findstart
- let namsym = haskellmode#GetNameSymbol(getline('.'),col('.'),-1) " insert-mode: we're 1 beyond the text
- if namsym==[]
- redraw
- echo 'no name/symbol under cursor!'
- return -1
- endif
- let [start,symb,qual,unqual] = namsym
- return (start-1)
- else " find keys matching with "a:base"
- let res = []
- let l = len(a:base)-1
- call GHC_HaveTypes()
- for key in keys(b:ghc_types)
- if key[0 : l]==a:base
- let res += [{"word":key,"menu":":: ".b:ghc_types[key],"dup":1}]
- endif
- endfor
- return res
- endif
-endfunction
-set omnifunc=GHC_CompleteImports
-"
-" Vim's default completeopt is menu,preview
-" you probably want at least menu, or you won't see alternatives listed
-" setlocal completeopt+=menu
-
-" menuone is useful, but other haskellmode menus will try to follow your choice here in future
-" setlocal completeopt+=menuone
-
-" longest sounds useful, but doesn't seem to do what it says, and interferes with CTRL-E
-" setlocal completeopt-=longest
-
-map <LocalLeader>ct :call GHC_CreateTagfile()<cr>
-function! GHC_CreateTagfile()
- redraw
- echo "creating tags file"
- let output = system(g:ghc . ' ' . b:ghc_staticoptions . ' -e ":ctags" ' . expand("%"))
- " for ghcs older than 6.6, you would need to call another program
- " here, such as hasktags
- echo output
-endfunction
-
-command! -nargs=1 GHCi redraw | echo system(g:ghc. ' ' . b:ghc_staticoptions .' '.expand("%").' -e "'.escape(<f-args>,'"').'"')
-
-" use :make 'not in scope' errors to explicitly list imported ids
-" cursor needs to be on import line, in correctly loadable module
-map <LocalLeader>ie :call GHC_MkImportsExplicit()<cr>
-function! GHC_MkImportsExplicit()
- let save_cursor = getpos(".")
- let line = getline('.')
- let lineno = line('.')
- let ml = matchlist(line,'^import\(\s*qualified\)\?\s*\([^( ]\+\)')
- if ml!=[]
- let [_,q,mod;x] = ml
- silent make
- if getqflist()==[]
- if line=~"import[^(]*Prelude"
- call setline(lineno,substitute(line,"(.*","","").'()')
- else
- call setline(lineno,'-- '.line)
- endif
- silent write
- silent make
- let qflist = getqflist()
- call setline(lineno,line)
- silent write
- let ids = {}
- for d in qflist
- let ml = matchlist(d.text,'Not in scope: \([^`]*\)`\([^'']*\)''')
- if ml!=[]
- let [_,what,qid;x] = ml
- let id = ( qid =~ "^[A-Z]" ? substitute(qid,'.*\.\([^.]*\)$','\1','') : qid )
- let pid = ( id =~ "[a-zA-Z0-9_']\\+" ? id : '('.id.')' )
- if what =~ "data"
- call GHC_HaveTypes()
- if has_key(b:ghc_types,id)
- let pid = substitute(b:ghc_types[id],'^.*->\s*\(\S*\).*$','\1','').'('.pid.')'
- else
- let pid = '???('.pid.')'
- endif
- endif
- let ids[pid] = 1
- endif
- endfor
- call setline(lineno,'import'.q.' '.mod.'('.join(keys(ids),',').')')
- else
- copen
- endif
- endif
- call setpos('.', save_cursor)
-endfunction
-
-" no need to ask GHC about its supported languages and
-" options with every editing session. cache the info in
-" ~/.vim/haskellmode.config
-" TODO: should we store more info (see haskell_doc.vim)?
-" move to autoload?
-" should we keep a history of GHC versions encountered?
-function! GHC_SaveConfig()
- let vimdir = expand('~').'/'.'.vim'
- let config = vimdir.'/haskellmode.config'
- if !isdirectory(vimdir)
- call mkdir(vimdir)
- endif
- let entries = ['-- '.g:ghc_version]
- for l in s:ghc_supported_languages
- let entries += [l]
- endfor
- let entries += ['--']
- for l in s:opts
- let entries += [l]
- endfor
- call writefile(entries,config)
-endfunction
-
-" reuse cached GHC configuration info, if using the same
-" GHC version.
-function! GHC_LoadConfig()
- let vimdir = expand('~').'/'.'.vim'
- let config = vimdir.'/haskellmode.config'
- if filereadable(config)
- let lines = readfile(config)
- if lines[0]=='-- '.g:ghc_version
- let i=1
- let s:ghc_supported_languages = []
- while i<len(lines) && lines[i]!='--'
- let s:ghc_supported_languages += [lines[i]]
- let i+=1
- endwhile
- let i+=1
- let s:opts = []
- while i<len(lines)
- let s:opts += [lines[i]]
- let i+=1
- endwhile
- return 1
- else
- return 0
- endif
- else
- return 0
- endif
-endfunction
-
-let s:GHC_CachedConfig = haskellmode#GHC_VersionGE([6,8]) && GHC_LoadConfig()
-
-if haskellmode#GHC_VersionGE([6,8,2])
- if !s:GHC_CachedConfig
- let s:opts = filter(split(substitute(system(g:ghc . ' -v0 --interactive', ':set'), ' ', '','g'), '\n'), 'v:val =~ "-f"')
- endif
-else
- let s:opts = ["-fglasgow-exts","-fallow-undecidable-instances","-fallow-overlapping-instances","-fno-monomorphism-restriction","-fno-mono-pat-binds","-fno-cse","-fbang-patterns","-funbox-strict-fields"]
-endif
-let s:opts = sort(s:opts)
-
-amenu ]OPTIONS_GHC.- :echo '-'<cr>
-aunmenu ]OPTIONS_GHC
-for o in s:opts
- exe 'amenu ]OPTIONS_GHC.'.o.' :call append(0,"{-# OPTIONS_GHC '.o.' #-}")<cr>'
-endfor
-if has("gui_running")
- map <LocalLeader>opt :popup ]OPTIONS_GHC<cr>
-else
- map <LocalLeader>opt :emenu ]OPTIONS_GHC.
-endif
-
-amenu ]LANGUAGES_GHC.- :echo '-'<cr>
-aunmenu ]LANGUAGES_GHC
-if haskellmode#GHC_VersionGE([6,8])
- if !s:GHC_CachedConfig
- let s:ghc_supported_languages = sort(split(system(g:ghc . ' --supported-languages'),'\n'))
- endif
- for l in s:ghc_supported_languages
- exe 'amenu ]LANGUAGES_GHC.'.l.' :call append(0,"{-# LANGUAGE '.l.' #-}")<cr>'
- endfor
- if has("gui_running")
- map <LocalLeader>lang :popup ]LANGUAGES_GHC<cr>
- else
- map <LocalLeader>lang :emenu ]LANGUAGES_GHC.
- endif
-endif
-
-if !s:GHC_CachedConfig
- call GHC_SaveConfig()
-endif
-