1 files changed, 105 insertions, 0 deletions
diff --git a/runtime/syntax/elm.vim b/runtime/syntax/elm.vim
new file mode 100644
index 000000000..1277827f5
--- /dev/null
+++ b/runtime/syntax/elm.vim
@@ -0,0 +1,105 @@
+" Vim syntax file
+" Language: Elm
+" Maintainer: Andreas Scharf <as@99n.de>
+" Original Author: Joseph Hager <ajhager@gmail.com>
+" Copyright: Joseph Hager <ajhager@gmail.com>
+" License: BSD3
+" Latest Revision: 2020-05-29
+
+if exists('b:current_syntax')
+  finish
+endif
+
+" Keywords
+syn keyword elmConditional else if of then case
+syn keyword elmAlias alias
+syn keyword elmTypedef contained type port
+syn keyword elmImport exposing as import module where
+
+" Operators
+" elm/core
+syn match elmOperator contained "\(<|\||>\|||\|&&\|==\|/=\|<=\|>=\|++\|::\|+\|-\|*\|/\|//\|^\|<>\|>>\|<<\|<\|>\|%\)"
+" elm/parser
+syn match elmOperator contained "\(|.\||=\)"
+" elm/url
+syn match elmOperator contained "\(</>\|<?>\)"
+
+" Types
+syn match elmType "\<[A-Z][0-9A-Za-z_-]*"
+syn keyword elmNumberType number
+
+" Modules
+syn match elmModule "\<\([A-Z][0-9A-Za-z_'-\.]*\)\+\.[A-Za-z]"me=e-2
+syn match elmModule "^\(module\|import\)\s\+[A-Z][0-9A-Za-z_'-\.]*\(\s\+as\s\+[A-Z][0-9A-Za-z_'-\.]*\)\?\(\s\+exposing\)\?" contains=elmImport
+
+" Delimiters
+syn match elmDelimiter  "[,;]"
+syn match elmBraces  "[()[\]{}]"
+
+" Functions
+syn match elmTupleFunction "\((,\+)\)"
+
+" Comments
+syn keyword elmTodo TODO FIXME XXX contained
+syn match elmLineComment "--.*" contains=elmTodo,@spell
+syn region elmComment matchgroup=elmComment start="{-|\=" end="-}" contains=elmTodo,elmComment,@spell fold
+
+" Strings
+syn match elmStringEscape "\\u[0-9a-fA-F]\{4}" contained
+syn match elmStringEscape "\\[nrfvbt\\\"]" contained
+syn region elmString start="\"" skip="\\\"" end="\"" contains=elmStringEscape,@spell
+syn region elmTripleString start="\"\"\"" skip="\\\"" end="\"\"\"" contains=elmStringEscape,@spell
+syn match elmChar "'[^'\\]'\|'\\.'\|'\\u[0-9a-fA-F]\{4}'"
+
+" Lambda
+syn region elmLambdaFunc start="\\"hs=s+1 end="->"he=e-2
+
+" Debug
+syn match elmDebug "Debug.\(log\|todo\|toString\)"
+
+" Numbers
+syn match elmInt "-\?\<\d\+\>"
+syn match elmFloat "-\?\(\<\d\+\.\d\+\>\)"
+
+" Identifiers
+syn match elmTopLevelDecl "^\s*[a-zA-Z][a-zA-z0-9_]*\('\)*\s\+:\(\r\n\|\r\|\n\|\s\)\+" contains=elmOperator
+syn match elmFuncName /^\l\w*/
+
+" Folding
+syn region elmTopLevelTypedef start="type" end="\n\(\n\n\)\@=" contains=ALL fold
+syn region elmTopLevelFunction start="^[a-zA-Z].\+\n[a-zA-Z].\+=" end="^\(\n\+\)\@=" contains=ALL fold
+syn region elmCaseBlock matchgroup=elmCaseBlockDefinition start="^\z\(\s\+\)\<case\>" end="^\z1\@!\W\@=" end="\(\n\n\z1\@!\)\@=" end="\n\z1\@!\(\n\n\)\@=" contains=ALL fold
+syn region elmCaseItemBlock start="^\z\(\s\+\).\+->$" end="^\z1\@!\W\@=" end="\(\n\n\z1\@!\)\@=" end="\(\n\z1\S\)\@=" contains=ALL fold
+syn region elmLetBlock matchgroup=elmLetBlockDefinition start="\<let\>" end="\<in\>" contains=ALL fold
+
+hi def link elmFuncName Function
+hi def link elmCaseBlockDefinition Conditional
+hi def link elmCaseBlockItemDefinition Conditional
+hi def link elmLetBlockDefinition TypeDef
+hi def link elmTopLevelDecl Function
+hi def link elmTupleFunction Normal
+hi def link elmTodo Todo
+hi def link elmComment Comment
+hi def link elmLineComment Comment
+hi def link elmString String
+hi def link elmTripleString String
+hi def link elmChar String
+hi def link elmStringEscape Special
+hi def link elmInt Number
+hi def link elmFloat Float
+hi def link elmDelimiter Delimiter
+hi def link elmBraces Delimiter
+hi def link elmTypedef TypeDef
+hi def link elmImport Include
+hi def link elmConditional Conditional
+hi def link elmAlias Delimiter
+hi def link elmOperator Operator
+hi def link elmType Type
+hi def link elmNumberType Identifier
+hi def link elmLambdaFunc Function
+hi def link elmDebug Debug
+hi def link elmModule Type
+
+syn sync minlines=500
+
+let b:current_syntax = 'elm'