" Vim syntax file
" Language: Smalltalk
" Maintainer: Arndt Hesse <hesse@self.de>
" Last change: 1997 Dec 24

" remove any old syntax stuff hanging around
syn clear

" some Smalltalk keywords and standard methods
syn keyword	stKeyword	super self class true false new not
syn keyword	stKeyword	notNil isNil inspect out nil
syn match	stMethod	"\<do\>:"
syn match	stMethod	"\<whileTrue\>:"
syn match	stMethod	"\<whileFalse\>:"
syn match	stMethod	"\<ifTrue\>:"
syn match	stMethod	"\<ifFalse\>:"
syn match	stMethod	"\<put\>:"
syn match	stMethod	"\<to\>:"
syn match	stMethod	"\<at\>:"
syn match	stMethod	"\<add\>:"
syn match	stMethod	"\<new\>:"
syn match	stMethod	"\<for\>:"
syn match	stMethod	"\<methods\>:"
syn match	stMethod	"\<methodsFor\>:"
syn match	stMethod	"\<instanceVariableNames\>:"
syn match	stMethod	"\<classVariableNames\>:"
syn match	stMethod	"\<poolDictionaries\>:"
syn match	stMethod	"\<subclass\>:"

" the block of local variables of a method
syn region stLocalVariables	start="^[ \t]*|" end="|"

" the Smalltalk comment
syn region stComment	start="\"" end="\""

" the Smalltalk strings and single characters
syn region stString	start='\'' skip="''" end='\''
syn match  stCharacter	"$."

syn case ignore

" the symols prefixed by a '#'
syn match  stSymbol	"\(#\<[a-z_][a-z0-9_]*\>\)"
syn match  stSymbol	"\(#'[^']*'\)"

" the variables in a statement block for loops
syn match  stBlockVariable "\(:[ \t]*\<[a-z_][a-z0-9_]*\>[ \t]*\)\+|" contained

" some representations of numbers
syn match  stNumber	"\<\d\+\(u\=l\=\|lu\|f\)\>"
syn match  stFloat	"\<\d\+\.\d*\(e[-+]\=\d\+\)\=[fl]\=\>"
syn match  stFloat	"\<\d\+e[-+]\=\d\+[fl]\=\>"

syn case match

" a try to higlight paren mismatches
syn region stParen	transparent start='(' end=')' contains=ALLBUT,stParenError
syn match  stParenError	")"
syn region stBlock	transparent start='\[' end='\]' contains=ALLBUT,stBlockError
syn match  stBlockError	"\]"
syn region stSet	transparent start='{' end='}' contains=ALLBUT,stSetError
syn match  stSetError	"}"

hi link stParenError stError
hi link stSetError stError
hi link stBlockError stError

" synchronization for syntax analysis
syn sync minlines=50

if !exists("did_st_syntax_inits")
  let did_st_syntax_inits = 1
  hi link stKeyword		Statement
  hi link stMethod		Statement
  hi link stComment		Comment
  hi link stCharacter		Constant
  hi link stString		Constant
  hi link stSymbol		Special
  hi link stNumber		Type
  hi link stFloat		Type
  hi link stError		Error
  hi link stLocalVariables	Identifier
  hi link stBlockVariable	Identifier
endif

let b:current_syntax = "st"
