Add purescript support, closes #110

5 files changed, 204 insertions, 0 deletions

diff --git a/README.md b/README.md
index 9af59f39..edc14bc1 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,7 @@ Optionally download one of the [releases](https://github.com/sheerun/vim-polyglo
 - [powershell](https://github.com/Persistent13/vim-ps1) (syntax, indent, ftplugin, ftdetect)
 - [protobuf](https://github.com/uarun/vim-protobuf) (syntax, ftdetect)
 - [puppet](https://github.com/voxpupuli/vim-puppet) (syntax, indent, ftplugin, ftdetect)
+- [purescript](https://github.com/raichoo/purescript-vim) (syntax, indent, ftdetect)
 - [python](https://github.com/mitsuhiko/vim-python-combined) (syntax, indent)
 - [qml](https://github.com/peterhoeg/vim-qml) (syntax, indent, ftplugin, ftdetect)
 - [r-lang](https://github.com/vim-scripts/R.vim) (syntax, ftplugin)
diff --git a/build b/build
index 99716c45..92923deb 100755
--- a/build
+++ b/build
@@ -153,6 +153,7 @@ PACKS="
   powershell:Persistent13/vim-ps1
   protobuf:uarun/vim-protobuf
   puppet:voxpupuli/vim-puppet
+  purescript:raichoo/purescript-vim
   python:mitsuhiko/vim-python-combined
   qml:peterhoeg/vim-qml
   r-lang:vim-scripts/R.vim
diff --git a/ftdetect/polyglot.vim b/ftdetect/polyglot.vim
index afe8ce44..799b7c64 100644
--- a/ftdetect/polyglot.vim
+++ b/ftdetect/polyglot.vim
@@ -383,6 +383,11 @@ if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'puppet') == -1
 au! BufRead,BufNewFile *.pp setfiletype puppet
 au! BufRead,BufNewFile Puppetfile setfiletype ruby
 endif
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'purescript') == -1
+  
+au BufNewFile,BufRead *.purs setf purescript
+au FileType purescript let &l:commentstring='{--%s--}'
+endif
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'qml') == -1
   
 autocmd BufRead,BufNewFile *.qml setfiletype qml
diff --git a/indent/purescript.vim b/indent/purescript.vim
new file mode 100644
index 00000000..c456c608
--- /dev/null
+++ b/indent/purescript.vim
@@ -0,0 +1,141 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'purescript') == -1
+  
+" indentation for purescript
+"
+" Based on idris indentation
+"
+" author: raichoo (raichoo@googlemail.com)
+"
+" Modify g:purescript_indent_if and g:purescript_indent_case to
+" change indentation for `if'(default 3) and `case'(default 5).
+" Example (in .vimrc):
+" > let g:purescript_indent_if = 2
+
+if exists('b:did_indent')
+  finish
+endif
+
+let b:did_indent = 1
+
+if !exists('g:purescript_indent_if')
+  " if bool
+  " >>>then ...
+  " >>>else ...
+  let g:purescript_indent_if = 3
+endif
+
+if !exists('g:purescript_indent_case')
+  " case xs of
+  " >>>>>[]     -> ...
+  " >>>>>(y:ys) -> ...
+  let g:purescript_indent_case = 5
+endif
+
+if !exists('g:purescript_indent_let')
+  " let x = 0 in
+  " >>>>x
+  let g:purescript_indent_let = 4
+endif
+
+if !exists('g:purescript_indent_where')
+  " where f :: Int -> Int
+  " >>>>>>f x = x
+  let g:purescript_indent_where = 6
+endif
+
+if !exists('g:purescript_indent_do')
+  " do x <- a
+  " >>>y <- b
+  let g:purescript_indent_do = 3
+endif
+
+setlocal indentexpr=GetPurescriptIndent()
+setlocal indentkeys=!^F,o,O,},=where,=in
+
+function! GetPurescriptIndent()
+  let prevline = getline(v:lnum - 1)
+  let line = getline(v:lnum)
+
+  if line =~ '^\s*\<where\>'
+    let s = match(prevline, '\S')
+    return s + 2
+  endif
+
+  if line =~ '^\s*\<in\>'
+    let n = v:lnum
+    let s = 0
+
+    while s <= 0 && n > 0
+      let n = n - 1
+      let s = match(getline(n),'\<let\>')
+    endwhile
+
+    return s + 1
+  endif
+
+  if prevline =~ '[!#$%&*+./<>?@\\^|~-]\s*$'
+    let s = match(prevline, '=')
+    if s > 0
+      return s + 2
+    endif
+
+    let s = match(prevline, ':')
+    if s > 0
+      return s + 3
+    else
+      return match(prevline, '\S')
+    endif
+  endif
+
+  if prevline =~ '[{([][^})\]]\+$'
+    return match(prevline, '[{([]')
+  endif
+
+  if prevline =~ '\<let\>\s\+.\+\(\<in\>\)\?\s*$'
+    return match(prevline, '\<let\>') + g:purescript_indent_let
+  endif
+
+  if prevline !~ '\<else\>'
+    let s = match(prevline, '\<if\>.*\&.*\zs\<then\>')
+    if s > 0
+      return s
+    endif
+
+    let s = match(prevline, '\<if\>')
+    if s > 0
+      return s + g:purescript_indent_if
+    endif
+  endif
+
+  if prevline =~ '\(\<where\>\|\<do\>\|=\|[{([]\)\s*$'
+    return match(prevline, '\S') + &shiftwidth
+  endif
+
+  if prevline =~ '\<where\>\s\+\S\+.*$'
+    return match(prevline, '\<where\>') + g:purescript_indent_where
+  endif
+
+  if prevline =~ '\<do\>\s\+\S\+.*$'
+    return match(prevline, '\<do\>') + g:purescript_indent_do
+  endif
+
+  if prevline =~ '^\s*\<data\>\s\+[^=]\+\s\+=\s\+\S\+.*$'
+    return match(prevline, '=')
+  endif
+
+  if prevline =~ '\<case\>\s\+.\+\<of\>\s*$'
+    return match(prevline, '\<case\>') + g:purescript_indent_case
+  endif
+
+  if prevline =~ '^\s*\<\data\>\s\+\S\+\s*$'
+    return match(prevline, '\<data\>') + &shiftwidth
+  endif
+
+  if (line =~ '^\s*}\s*' && prevline !~ '^\s*;')
+    return match(prevline, '\S') - &shiftwidth
+  endif
+
+  return match(prevline, '\S')
+endfunction
+
+endif
diff --git a/syntax/purescript.vim b/syntax/purescript.vim
new file mode 100644
index 00000000..298a3008
--- /dev/null
+++ b/syntax/purescript.vim
@@ -0,0 +1,56 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'purescript') == -1
+  
+" syntax highlighting for purescript
+"
+" Heavily modified version of the purescript syntax
+" highlighter to support purescript.
+"
+" author: raichoo (raichoo@googlemail.com)
+
+if exists("b:current_syntax")
+  finish
+endif
+
+syn keyword purescriptModule module
+syn keyword purescriptImport foreign import hiding
+syn region purescriptQualifiedImport start="\<qualified\>" contains=purescriptType,purescriptDot end="\<as\>"
+syn keyword purescriptStructure data newtype type class instance derive where
+syn keyword purescriptStatement forall do case of let in
+syn keyword purescriptConditional if then else
+syn match purescriptNumber "\<[0-9]\+\>\|\<0[xX][0-9a-fA-F]\+\>\|\<0[oO][0-7]\+\>"
+syn match purescriptFloat "\<[0-9]\+\.[0-9]\+\([eE][-+]\=[0-9]\+\)\=\>"
+syn match purescriptDelimiter  "[(),;[\]{}]"
+syn keyword purescriptInfix infix infixl infixr
+syn match purescriptOperators "\([-!#$%&\*\+/<=>\?@\\^|~:]\|\<_\>\)"
+syn match purescriptDot "\."
+syn match purescriptType "\<\([A-Z][a-zA-Z0-9_]*\|_|_\)\>"
+syn match purescriptLineComment "---*\([^-!#$%&\*\+./<=>\?@\\^|~].*\)\?$"
+syn match purescriptChar "'[^'\\]'\|'\\.'\|'\\u[0-9a-fA-F]\{4}'"
+syn match purescriptBacktick "`[A-Za-z][A-Za-z0-9_]*`"
+syn region purescriptString start=+"+ skip=+\\\\\|\\"+ end=+"+
+syn region purescriptMultilineString start=+"""+ end=+"""+
+syn region purescriptBlockComment start="{-" end="-}" contains=purescriptBlockComment
+
+highlight def link purescriptImport Structure
+highlight def link purescriptQualifiedImport Structure
+highlight def link purescriptModule Structure
+highlight def link purescriptStructure Structure
+highlight def link purescriptStatement Statement
+highlight def link purescriptConditional Conditional
+highlight def link purescriptNumber Number
+highlight def link purescriptFloat Float
+highlight def link purescriptDelimiter Delimiter
+highlight def link purescriptInfix PreProc
+highlight def link purescriptOperators Operator
+highlight def link purescriptDot Operator
+highlight def link purescriptType Include
+highlight def link purescriptLineComment Comment
+highlight def link purescriptBlockComment Comment
+highlight def link purescriptString String
+highlight def link purescriptMultilineString String
+highlight def link purescriptChar String
+highlight def link purescriptBacktick Operator
+
+let b:current_syntax = "purescript"
+
+endif