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Current File : /usr/share/vim/vim74/syntax/vhdl.vim
" Vim syntax file
" Language:	VHDL
" Maintainer:	Czo <Olivier.Sirol@lip6.fr>
" Credits:	Stephan Hegel <stephan.hegel@snc.siemens.com.cn>
" Last Change:	2012 Jun 01
" 		(Dominique Pelle added @Spell)

" VHSIC Hardware Description Language
" Very High Scale Integrated Circuit

" For version 5.x: Clear all syntax items
" For version 6.x: Quit when a syntax file was already loaded
if version < 600
  syntax clear
elseif exists("b:current_syntax")
  finish
endif

let s:cpo_save = &cpo
set cpo&vim

" This is not VHDL. I use the C-Preprocessor cpp to generate different binaries
" from one VHDL source file. Unfortunately there is no preprocessor for VHDL
" available. If you don't like this, please remove the following lines.
syn match cDefine "^#ifdef[ ]\+[A-Za-z_]\+"
syn match cDefine "^#endif"

" case is not significant
syn case ignore

" VHDL keywords
syn keyword vhdlStatement access after alias all assert
syn keyword vhdlStatement architecture array attribute
syn keyword vhdlStatement begin block body buffer bus
syn keyword vhdlStatement case component configuration constant
syn keyword vhdlStatement disconnect downto
syn keyword vhdlStatement elsif end entity exit
syn keyword vhdlStatement file for function
syn keyword vhdlStatement generate generic group guarded
syn keyword vhdlStatement impure in inertial inout is
syn keyword vhdlStatement label library linkage literal loop
syn keyword vhdlStatement map
syn keyword vhdlStatement new next null
syn keyword vhdlStatement of on open others out
syn keyword vhdlStatement package port postponed procedure process pure
syn keyword vhdlStatement range record register reject report return
syn keyword vhdlStatement select severity signal shared
syn keyword vhdlStatement subtype
syn keyword vhdlStatement then to transport type
syn keyword vhdlStatement unaffected units until use
syn keyword vhdlStatement variable wait when while with
syn keyword vhdlStatement note warning error failure

" Special match for "if" and "else" since "else if" shouldn't be highlighted.
" The right keyword is "elsif"
syn match   vhdlStatement "\<\(if\|else\)\>"
syn match   vhdlNone      "\<else\s\+if\>$"
syn match   vhdlNone      "\<else\s\+if\>\s"

" Predefined VHDL types
syn keyword vhdlType bit bit_vector
syn keyword vhdlType character boolean integer real time
syn keyword vhdlType string severity_level
" Predefined standard ieee VHDL types
syn keyword vhdlType positive natural signed unsigned
syn keyword vhdlType line text
syn keyword vhdlType std_logic std_logic_vector
syn keyword vhdlType std_ulogic std_ulogic_vector
" Predefined non standard VHDL types for Mentor Graphics Sys1076/QuickHDL
syn keyword vhdlType qsim_state qsim_state_vector
syn keyword vhdlType qsim_12state qsim_12state_vector
syn keyword vhdlType qsim_strength
" Predefined non standard VHDL types for Alliance VLSI CAD
syn keyword vhdlType mux_bit mux_vector reg_bit reg_vector wor_bit wor_vector

" array attributes
syn match vhdlAttribute "\'high"
syn match vhdlAttribute "\'left"
syn match vhdlAttribute "\'length"
syn match vhdlAttribute "\'low"
syn match vhdlAttribute "\'range"
syn match vhdlAttribute "\'reverse_range"
syn match vhdlAttribute "\'right"
syn match vhdlAttribute "\'ascending"
" block attributes
syn match vhdlAttribute "\'behaviour"
syn match vhdlAttribute "\'structure"
syn match vhdlAttribute "\'simple_name"
syn match vhdlAttribute "\'instance_name"
syn match vhdlAttribute "\'path_name"
syn match vhdlAttribute "\'foreign"
" signal attribute
syn match vhdlAttribute "\'active"
syn match vhdlAttribute "\'delayed"
syn match vhdlAttribute "\'event"
syn match vhdlAttribute "\'last_active"
syn match vhdlAttribute "\'last_event"
syn match vhdlAttribute "\'last_value"
syn match vhdlAttribute "\'quiet"
syn match vhdlAttribute "\'stable"
syn match vhdlAttribute "\'transaction"
syn match vhdlAttribute "\'driving"
syn match vhdlAttribute "\'driving_value"
" type attributes
syn match vhdlAttribute "\'base"
syn match vhdlAttribute "\'high"
syn match vhdlAttribute "\'left"
syn match vhdlAttribute "\'leftof"
syn match vhdlAttribute "\'low"
syn match vhdlAttribute "\'pos"
syn match vhdlAttribute "\'pred"
syn match vhdlAttribute "\'rightof"
syn match vhdlAttribute "\'succ"
syn match vhdlAttribute "\'val"
syn match vhdlAttribute "\'image"
syn match vhdlAttribute "\'value"

syn keyword vhdlBoolean true false

" for this vector values case is significant
syn case match
" Values for standard VHDL types
syn match vhdlVector "\'[0L1HXWZU\-\?]\'"
" Values for non standard VHDL types qsim_12state for Mentor Graphics Sys1076/QuickHDL
syn keyword vhdlVector S0S S1S SXS S0R S1R SXR S0Z S1Z SXZ S0I S1I SXI
syn case ignore

syn match  vhdlVector "B\"[01_]\+\""
syn match  vhdlVector "O\"[0-7_]\+\""
syn match  vhdlVector "X\"[0-9a-f_]\+\""
syn match  vhdlCharacter "'.'"
syn region vhdlString start=+"+  end=+"+ contains=@Spell

" floating numbers
syn match vhdlNumber "-\=\<\d\+\.\d\+\(E[+\-]\=\d\+\)\>"
syn match vhdlNumber "-\=\<\d\+\.\d\+\>"
syn match vhdlNumber "0*2#[01_]\+\.[01_]\+#\(E[+\-]\=\d\+\)\="
syn match vhdlNumber "0*16#[0-9a-f_]\+\.[0-9a-f_]\+#\(E[+\-]\=\d\+\)\="
" integer numbers
syn match vhdlNumber "-\=\<\d\+\(E[+\-]\=\d\+\)\>"
syn match vhdlNumber "-\=\<\d\+\>"
syn match vhdlNumber "0*2#[01_]\+#\(E[+\-]\=\d\+\)\="
syn match vhdlNumber "0*16#[0-9a-f_]\+#\(E[+\-]\=\d\+\)\="
" operators
syn keyword vhdlOperator and nand or nor xor xnor
syn keyword vhdlOperator rol ror sla sll sra srl
syn keyword vhdlOperator mod rem abs not
syn match   vhdlOperator "[&><=:+\-*\/|]"
syn match   vhdlSpecial  "[().,;]"
" time
syn match vhdlTime "\<\d\+\s\+\(\([fpnum]s\)\|\(sec\)\|\(min\)\|\(hr\)\)\>"
syn match vhdlTime "\<\d\+\.\d\+\s\+\(\([fpnum]s\)\|\(sec\)\|\(min\)\|\(hr\)\)\>"

syn match vhdlComment "--.*$" contains=@Spell
" syn match vhdlGlobal "[\'$#~!%@?\^\[\]{}\\]"

" Define the default highlighting.
" For version 5.7 and earlier: only when not done already
" For version 5.8 and later: only when an item doesn't have highlighting yet
if version >= 508 || !exists("did_vhdl_syntax_inits")
  if version < 508
    let did_vhdl_syntax_inits = 1
    command -nargs=+ HiLink hi link <args>
  else
    command -nargs=+ HiLink hi def link <args>
  endif

  HiLink cDefine       PreProc
  HiLink vhdlSpecial   Special
  HiLink vhdlStatement Statement
  HiLink vhdlCharacter String
  HiLink vhdlString    String
  HiLink vhdlVector    String
  HiLink vhdlBoolean   String
  HiLink vhdlComment   Comment
  HiLink vhdlNumber    String
  HiLink vhdlTime      String
  HiLink vhdlType      Type
  HiLink vhdlOperator  Type
  HiLink vhdlGlobal    Error
  HiLink vhdlAttribute Type

  delcommand HiLink
endif

let b:current_syntax = "vhdl"

let &cpo = s:cpo_save
unlet s:cpo_save
" vim: ts=8
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