if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'elixir') == -1
  
if exists("b:current_syntax")
  finish
endif

let s:cpo_save = &cpo
set cpo&vim

" syncing starts 2000 lines before top line so docstrings don't screw things up
syn sync minlines=2000

syn cluster elixirNotTop contains=@elixirRegexSpecial,@elixirStringContained,@elixirDeclaration,elixirTodo,elixirArguments,elixirBlockDefinition,elixirUnusedVariable,elixirStructDelimiter
syn cluster elixirRegexSpecial contains=elixirRegexEscape,elixirRegexCharClass,elixirRegexQuantifier,elixirRegexEscapePunctuation
syn cluster elixirStringContained contains=elixirInterpolation,elixirRegexEscape,elixirRegexCharClass
syn cluster elixirDeclaration contains=elixirFunctionDeclaration,elixirModuleDeclaration,elixirProtocolDeclaration,elixirImplDeclaration,elixirRecordDeclaration,elixirMacroDeclaration,elixirDelegateDeclaration,elixirOverridableDeclaration,elixirExceptionDeclaration,elixirCallbackDeclaration,elixirStructDeclaration

syn match elixirComment '#.*' contains=elixirTodo,@Spell
syn keyword elixirTodo FIXME NOTE TODO OPTIMIZE XXX HACK contained

syn match elixirId '\<[_a-zA-Z]\w*[!?]\?\>' contains=elixirUnusedVariable,elixirKernelFunction

syn match elixirKeyword '\(\.\)\@<!\<\(for\|case\|when\|with\|cond\|if\|unless\|try\|receive\|send\)\>'
syn match elixirKeyword '\(\.\)\@<!\<\(exit\|raise\|throw\|after\|rescue\|catch\|else\)\>'
syn match elixirKeyword '\(\.\)\@<!\<\(quote\|unquote\|super\|spawn\|spawn_link\|spawn_monitor\)\>'

" Kernel functions
syn keyword elixirKernelFunction contained is_atom is_binary is_bitstring is_boolean is_float
syn keyword elixirKernelFunction contained is_function is_integer is_list is_map is_nil
syn keyword elixirKernelFunction contained is_number is_pid is_port is_reference is_tuple
syn keyword elixirKernelFunction contained abs binary_part bit_size byte_size div elem hd length
syn keyword elixirKernelFunction contained map_size node rem round tl trunc tuple_size

syn keyword elixirInclude import require alias use

syn keyword elixirSelf self

" This unfortunately also matches function names in function calls
syn match elixirUnusedVariable contained '\v%(^|[^.])@<=<_\w*>'

syn match   elixirOperator '\v\.@<!<%(and|or|in|not)>'
syn match   elixirOperator '!==\|!=\|!'
syn match   elixirOperator '=\~\|===\|==\|='
syn match   elixirOperator '<<<\|<<\|<=\|<-\|<'
syn match   elixirOperator '>>>\|>>\|>=\|>'
syn match   elixirOperator '->\|--\|-'
syn match   elixirOperator '++\|+'
syn match   elixirOperator '&&&\|&&\|&'
syn match   elixirOperator '|||\|||\||>\||'
syn match   elixirOperator '\.\.\|\.'
syn match   elixirOperator "\^\^\^\|\^"
syn match   elixirOperator '\\\\\|::\|\*\|/\|\~\~\~\|@'

syn match   elixirAtom '\(:\)\@<!:\%([a-zA-Z_]\w*\%([?!]\|=[>=]\@!\)\?\|<>\|===\?\|>=\?\|<=\?\)'
syn match   elixirAtom '\(:\)\@<!:\%(<=>\|&&\?\|%\(()\|\[\]\|{}\)\|++\?\|--\?\|||\?\|!\|//\|[%&`/|]\)'
syn match   elixirAtom "\%([a-zA-Z_]\w*[?!]\?\):\(:\)\@!"

syn match   elixirAlias '\([a-z]\)\@<![A-Z]\w*'

syn keyword elixirBoolean true false nil

syn match elixirVariable '@[a-z]\w*'
syn match elixirVariable '&\d\+'

syn keyword elixirPseudoVariable __FILE__ __DIR__ __MODULE__ __ENV__ __CALLER__

syn match elixirNumber '\<\d\(_\?\d\)*\(\.[^[:space:][:digit:]]\@!\(_\?\d\)*\)\?\([eE][-+]\?\d\(_\?\d\)*\)\?\>'
syn match elixirNumber '\<0[xX][0-9A-Fa-f]\+\>'
syn match elixirNumber '\<0[bB][01]\+\>'

syn match elixirRegexEscape            "\\\\\|\\[aAbBcdDefGhHnrsStvVwW]\|\\\d\{3}\|\\x[0-9a-fA-F]\{2}" contained
syn match elixirRegexEscapePunctuation "?\|\\.\|*\|\\\[\|\\\]\|+\|\\^\|\\\$\|\\|\|\\(\|\\)\|\\{\|\\}" contained
syn match elixirRegexQuantifier        "[*?+][?+]\=" contained display
syn match elixirRegexQuantifier        "{\d\+\%(,\d*\)\=}?\=" contained display
syn match elixirRegexCharClass         "\[:\(alnum\|alpha\|ascii\|blank\|cntrl\|digit\|graph\|lower\|print\|punct\|space\|upper\|word\|xdigit\):\]" contained display

syn region elixirRegex matchgroup=elixirRegexDelimiter start="%r/" end="/[uiomxfr]*" skip="\\\\" contains=@elixirRegexSpecial

syn region elixirTuple matchgroup=elixirTupleDelimiter start="\(\w\|#\)\@<!{" end="}" contains=ALLBUT,@elixirNotTop

syn match elixirStructDelimiter '{' contained containedin=elixirStruct
syn region elixirStruct matchgroup=elixirStructDelimiter start="%\(\w\+{\)\@=" end="}" contains=ALLBUT,@elixirNotTop

syn region elixirMap matchgroup=elixirMapDelimiter start="%{" end="}" contains=ALLBUT,@elixirNotTop

syn region elixirString  matchgroup=elixirStringDelimiter start=+\z('\)+   end=+\z1+ skip=+\\\\\|\\\z1+  contains=@Spell,@elixirStringContained
syn region elixirString  matchgroup=elixirStringDelimiter start=+\z("\)+   end=+\z1+ skip=+\\\\\|\\\z1+  contains=@Spell,@elixirStringContained
syn region elixirString  matchgroup=elixirStringDelimiter start=+\z('''\)+ end=+^\s*\z1+ contains=@Spell,@elixirStringContained
syn region elixirString  matchgroup=elixirStringDelimiter start=+\z("""\)+ end=+^\s*\z1+ contains=@Spell,@elixirStringContained
syn region elixirInterpolation matchgroup=elixirInterpolationDelimiter start="#{" end="}" contained contains=ALLBUT,elixirKernelFunction,elixirComment,@elixirNotTop

syn match elixirAtomInterpolated   ':\("\)\@=' contains=elixirString
syn match elixirString             "\(\w\)\@<!?\%(\\\(x\d{1,2}\|\h{1,2}\h\@!\>\|0[0-7]{0,2}[0-7]\@!\>\|[^x0MC]\)\|(\\[MC]-)+\w\|[^\s\\]\)"

syn region elixirBlock              matchgroup=elixirBlockDefinition start="\<do\>:\@!" end="\<end\>" contains=ALLBUT,elixirKernelFunction,@elixirNotTop fold
syn region elixirElseBlock          matchgroup=elixirBlockDefinition start="\<else\>:\@!" end="\<end\>" contains=ALLBUT,elixirKernelFunction,@elixirNotTop fold
syn region elixirAnonymousFunction  matchgroup=elixirBlockDefinition start="\<fn\>"     end="\<end\>" contains=ALLBUT,elixirKernelFunction,@elixirNotTop fold

syn region elixirArguments start="(" end=")" contained contains=elixirOperator,elixirAtom,elixirPseudoVariable,elixirAlias,elixirBoolean,elixirVariable,elixirUnusedVariable,elixirNumber,elixirDocString,elixirAtomInterpolated,elixirRegex,elixirString,elixirStringDelimiter,elixirRegexDelimiter,elixirInterpolationDelimiter,elixirSigil,elixirAnonymousFunction

syn match elixirDelimEscape "\\[(<{\[)>}\]/\"'|]" transparent display contained contains=NONE

syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\u\z(/\|\"\|'\||\)" end="\z1" skip="\\\\\|\\\z1" contains=elixirDelimEscape fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\u{"                end="}"   skip="\\\\\|\\}"   contains=elixirDelimEscape fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\u<"                end=">"   skip="\\\\\|\\>"   contains=elixirDelimEscape fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\u\["               end="\]"  skip="\\\\\|\\\]"  contains=elixirDelimEscape fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\u("                end=")"   skip="\\\\\|\\)"   contains=elixirDelimEscape fold

syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l\z(/\|\"\|'\||\)" end="\z1" skip="\\\\\|\\\z1"                                                              fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l{"                end="}"   skip="\\\\\|\\}"   contains=@elixirStringContained,elixirRegexEscapePunctuation fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l<"                end=">"   skip="\\\\\|\\>"   contains=@elixirStringContained,elixirRegexEscapePunctuation fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l\["               end="\]"  skip="\\\\\|\\\]"  contains=@elixirStringContained,elixirRegexEscapePunctuation fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l("                end=")"   skip="\\\\\|\\)"   contains=@elixirStringContained,elixirRegexEscapePunctuation fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start="\~\l\/"               end="\/"  skip="\\\\\|\\\/"  contains=@elixirStringContained,elixirRegexEscapePunctuation fold

" Sigils surrounded with heredoc
syn region elixirSigil matchgroup=elixirSigilDelimiter start=+\~\a\z("""\)+ end=+^\s*\zs\z1\s*$+ skip=+\\"+ fold
syn region elixirSigil matchgroup=elixirSigilDelimiter start=+\~\a\z('''\)+ end=+^\s*\zs\z1\s*$+ skip=+\\'+ fold

" Documentation
if exists('g:elixir_use_markdown_for_docs') && g:elixir_use_markdown_for_docs
  syn include @markdown syntax/markdown.vim
  syn cluster elixirDocStringContained contains=@markdown,@Spell,elixirInterpolation
else
  let g:elixir_use_markdown_for_docs = 0
  syn cluster elixirDocStringContained contains=elixirDocTest,elixirTodo,@Spell,elixirInterpolation

  " doctests
  syn region elixirDocTest start="^\s*\%(iex\|\.\.\.\)\%((\d*)\)\?>\s" end="^\s*$" contained
endif

syn region elixirDocString matchgroup=elixirSigilDelimiter  start="\%(@\w*doc\s\+\)\@<=\~[Ss]\z(/\|\"\|'\||\)" end="\z1" skip="\\\\\|\\\z1" contains=@elixirDocStringContained fold keepend
syn region elixirDocString matchgroup=elixirSigilDelimiter  start="\%(@\w*doc\s\+\)\@<=\~[Ss]{"                   end="}"   skip="\\\\\|\\}"   contains=@elixirDocStringContained fold keepend
syn region elixirDocString matchgroup=elixirSigilDelimiter  start="\%(@\w*doc\s\+\)\@<=\~[Ss]<"                   end=">"   skip="\\\\\|\\>"   contains=@elixirDocStringContained fold keepend
syn region elixirDocString matchgroup=elixirSigilDelimiter  start="\%(@\w*doc\s\+\)\@<=\~[Ss]\["                  end="\]"  skip="\\\\\|\\\]"  contains=@elixirDocStringContained fold keepend
syn region elixirDocString matchgroup=elixirSigilDelimiter  start="\%(@\w*doc\s\+\)\@<=\~[Ss]("                   end=")"   skip="\\\\\|\\)"   contains=@elixirDocStringContained fold keepend
syn region elixirDocString matchgroup=elixirStringDelimiter start=+\%(@\w*doc\s\+\)\@<=\z("\)+                 end=+\z1+ skip=+\\\\\|\\\z1+  contains=@elixirDocStringContained keepend
syn region elixirDocString matchgroup=elixirStringDelimiter start=+\%(@\w*doc\s\+\)\@<=\z("""\)+               end=+\z1+ contains=@elixirDocStringContained fold keepend
syn region elixirDocString matchgroup=elixirSigilDelimiter  start=+\%(@\w*doc\s\+\)\@<=\~[Ss]\z('''\)+ end=+\z1+ skip=+\\'+ contains=@elixirDocStringContained fold keepend
syn region elixirDocString matchgroup=elixirSigilDelimiter  start=+\%(@\w*doc\s\+\)\@<=\~[Ss]\z("""\)+ end=+\z1+ skip=+\\"+ contains=@elixirDocStringContained fold keepend

" Defines
syn match elixirDefine              '\<def\>\(:\)\@!'             nextgroup=elixirFunctionDeclaration    skipwhite skipnl
syn match elixirPrivateDefine       '\<defp\>\(:\)\@!'            nextgroup=elixirFunctionDeclaration    skipwhite skipnl
syn match elixirModuleDefine        '\<defmodule\>\(:\)\@!'       nextgroup=elixirModuleDeclaration      skipwhite skipnl
syn match elixirProtocolDefine      '\<defprotocol\>\(:\)\@!'     nextgroup=elixirProtocolDeclaration    skipwhite skipnl
syn match elixirImplDefine          '\<defimpl\>\(:\)\@!'         nextgroup=elixirImplDeclaration        skipwhite skipnl
syn match elixirRecordDefine        '\<defrecord\>\(:\)\@!'       nextgroup=elixirRecordDeclaration      skipwhite skipnl
syn match elixirPrivateRecordDefine '\<defrecordp\>\(:\)\@!'      nextgroup=elixirRecordDeclaration      skipwhite skipnl
syn match elixirMacroDefine         '\<defmacro\>\(:\)\@!'        nextgroup=elixirMacroDeclaration       skipwhite skipnl
syn match elixirPrivateMacroDefine  '\<defmacrop\>\(:\)\@!'       nextgroup=elixirMacroDeclaration       skipwhite skipnl
syn match elixirDelegateDefine      '\<defdelegate\>\(:\)\@!'     nextgroup=elixirDelegateDeclaration    skipwhite skipnl
syn match elixirOverridableDefine   '\<defoverridable\>\(:\)\@!'  nextgroup=elixirOverridableDeclaration skipwhite skipnl
syn match elixirExceptionDefine     '\<defexception\>\(:\)\@!'    nextgroup=elixirExceptionDeclaration   skipwhite skipnl
syn match elixirCallbackDefine      '\<defcallback\>\(:\)\@!'     nextgroup=elixirCallbackDeclaration    skipwhite skipnl
syn match elixirStructDefine        '\<defstruct\>\(:\)\@!'       skipwhite skipnl

" Declarations
syn match  elixirModuleDeclaration      "[^[:space:];#<]\+"        contained                      nextgroup=elixirBlock     skipwhite skipnl
syn match  elixirFunctionDeclaration    "[^[:space:];#<,()\[\]]\+" contained                      nextgroup=elixirArguments skipwhite skipnl
syn match  elixirProtocolDeclaration    "[^[:space:];#<]\+"        contained contains=elixirAlias                           skipwhite skipnl
syn match  elixirImplDeclaration        "[^[:space:];#<]\+"        contained contains=elixirAlias                           skipwhite skipnl
syn match  elixirRecordDeclaration      "[^[:space:];#<]\+"        contained contains=elixirAlias,elixirAtom                skipwhite skipnl
syn match  elixirMacroDeclaration       "[^[:space:];#<,()\[\]]\+" contained                      nextgroup=elixirArguments skipwhite skipnl
syn match  elixirDelegateDeclaration    "[^[:space:];#<,()\[\]]\+" contained contains=elixirFunctionDeclaration             skipwhite skipnl
syn region elixirDelegateDeclaration    start='\['     end='\]'    contained contains=elixirFunctionDeclaration             skipwhite skipnl
syn match  elixirOverridableDeclaration "[^[:space:];#<]\+"        contained contains=elixirAlias                           skipwhite skipnl
syn match  elixirExceptionDeclaration   "[^[:space:];#<]\+"        contained contains=elixirAlias                           skipwhite skipnl
syn match  elixirCallbackDeclaration    "[^[:space:];#<,()\[\]]\+" contained contains=elixirFunctionDeclaration             skipwhite skipnl

" ExUnit
syn match  elixirExUnitMacro "\(^\s*\)\@<=\<\(test\|describe\|setup\|setup_all\|on_exit\|doctest\)\>"
syn match  elixirExUnitAssert "\(^\s*\)\@<=\<\(assert\|assert_in_delta\|assert_raise\|assert_receive\|assert_received\|catch_error\)\>"
syn match  elixirExUnitAssert "\(^\s*\)\@<=\<\(catch_exit\|catch_throw\|flunk\|refute\|refute_in_delta\|refute_receive\|refute_received\)\>"

hi def link elixirBlockDefinition        Keyword
hi def link elixirDefine                 Define
hi def link elixirPrivateDefine          Define
hi def link elixirModuleDefine           Define
hi def link elixirProtocolDefine         Define
hi def link elixirImplDefine             Define
hi def link elixirRecordDefine           Define
hi def link elixirPrivateRecordDefine    Define
hi def link elixirMacroDefine            Define
hi def link elixirPrivateMacroDefine     Define
hi def link elixirDelegateDefine         Define
hi def link elixirOverridableDefine      Define
hi def link elixirExceptionDefine        Define
hi def link elixirCallbackDefine         Define
hi def link elixirStructDefine           Define
hi def link elixirExUnitMacro            Define
hi def link elixirModuleDeclaration      Type
hi def link elixirFunctionDeclaration    Function
hi def link elixirMacroDeclaration       Macro
hi def link elixirInclude                Include
hi def link elixirComment                Comment
hi def link elixirTodo                   Todo
hi def link elixirKeyword                Keyword
hi def link elixirExUnitAssert           Keyword
hi def link elixirKernelFunction         Keyword
hi def link elixirOperator               Operator
hi def link elixirAtom                   Constant
hi def link elixirPseudoVariable         Constant
hi def link elixirAlias                  Type
hi def link elixirBoolean                Boolean
hi def link elixirVariable               Identifier
hi def link elixirSelf                   Identifier
hi def link elixirUnusedVariable         Comment
hi def link elixirNumber                 Number
hi def link elixirDocString              Comment
hi def link elixirDocTest                elixirKeyword
hi def link elixirAtomInterpolated       elixirAtom
hi def link elixirRegex                  elixirString
hi def link elixirRegexEscape            elixirSpecial
hi def link elixirRegexEscapePunctuation elixirSpecial
hi def link elixirRegexCharClass         elixirSpecial
hi def link elixirRegexQuantifier        elixirSpecial
hi def link elixirSpecial                Special
hi def link elixirString                 String
hi def link elixirSigil                  String
hi def link elixirStringDelimiter        Delimiter
hi def link elixirRegexDelimiter         Delimiter
hi def link elixirInterpolationDelimiter Delimiter
hi def link elixirSigilDelimiter         Delimiter

let b:current_syntax = "elixir"

let &cpo = s:cpo_save
unlet s:cpo_save

endif