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" Vim syntax file
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" Language:	Fortran 2008 (and older: Fortran 2003, 95, 90, and 77)
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" Version:	100
" Last Change:	2016 Oct. 29
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" Maintainer:	Ajit J. Thakkar <ajit@unb.ca>; <http://www2.unb.ca/~ajit/>
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" Usage:	For instructions, do :help fortran-syntax from Vim
" Credits:
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"  Version 0.1 (April 2000) for Fortran 95 was based on the Fortran 77 syntax file by
"  Mario Eusebio and Preben Guldberg. Since then, useful suggestions and contributions
"  have been made, in chronological order, by:
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"  Andrej Panjkov, Bram Moolenaar, Thomas Olsen, Michael Sternberg, Christian Reile,
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"  Walter Dieudonn, Alexander Wagner, Roman Bertle, Charles Rendleman,
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"  Andrew Griffiths, Joe Krahn, Hendrik Merx, Matt Thompson, Jan Hermann,
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"  Stefano Zaghi, Vishnu V. Krishnan and Judical Grasset
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if exists("b:current_syntax")
  finish
endif

let s:cpo_save = &cpo
set cpo&vim

" Choose fortran_dialect using the priority:
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" source file directive > buffer-local value > global value > file extension
" first try using directive in first three lines of file
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let b:fortran_retype = getline(1)." ".getline(2)." ".getline(3)
if b:fortran_retype =~? '\<fortran_dialect\s*=\s*F\>'
  let b:fortran_dialect = "F"
elseif b:fortran_retype =~? '\<fortran_dialect\s*=\s*f08\>'
  let b:fortran_dialect = "f08"
elseif !exists("b:fortran_dialect")
  if exists("g:fortran_dialect") && g:fortran_dialect =~# '\<F\|f08\>'
    " try global variable
    let b:fortran_dialect = g:fortran_dialect
  else         " nothing found, so use default
    let b:fortran_dialect = "f08"
  endif
endif
unlet! b:fortran_retype
" make sure buffer-local value is not invalid
if b:fortran_dialect !~# '\<F\|f08\>'
  let b:fortran_dialect = "f08"
endif

" Choose between fixed and free source form if this hasn't been done yet
if !exists("b:fortran_fixed_source")
  if b:fortran_dialect == "F"
    " F requires free source form
    let b:fortran_fixed_source = 0
  elseif exists("fortran_free_source")
    " User guarantees free source form for all fortran files
    let b:fortran_fixed_source = 0
  elseif exists("fortran_fixed_source")
    " User guarantees fixed source form for all fortran files
    let b:fortran_fixed_source = 1
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  elseif expand("%:e") ==? "f\<90\|95\|03\|08\>"
    " Free-form file extension defaults as in Intel ifort, gcc(gfortran), NAG, Pathscale, and Cray compilers
    let b:fortran_fixed_source = 0
  elseif expand("%:e") ==? "f\|f77\|for"
    " Fixed-form file extension defaults
    let b:fortran_fixed_source = 1
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  else
    " Modern fortran still allows both free and fixed source form.
    " Assume fixed source form unless signs of free source form
    " are detected in the first five columns of the first s:lmax lines.
    " Detection becomes more accurate and time-consuming if more lines
    " are checked. Increase the limit below if you keep lots of comments at
    " the very top of each file and you have a fast computer.
    let s:lmax = 500
    if ( s:lmax > line("$") )
      let s:lmax = line("$")
    endif
    let b:fortran_fixed_source = 1
    let s:ln=1
    while s:ln <= s:lmax
      let s:test = strpart(getline(s:ln),0,5)
      if s:test !~ '^[Cc*]' && s:test !~ '^ *[!#]' && s:test =~ '[^ 0-9\t]' && s:test !~ '^[ 0-9]*\t'
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        let b:fortran_fixed_source = 0
        break
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      endif
      let s:ln = s:ln + 1
    endwhile
    unlet! s:lmax s:ln s:test
  endif
endif

syn case ignore

if b:fortran_fixed_source == 1
  syn match fortranConstructName	"^\s\{6,}\zs\a\w*\ze\s*:"
else
  syn match fortranConstructName	"^\s*\zs\a\w*\ze\s*:"
endif
if exists("fortran_more_precise")
  syn match fortranConstructName "\(\<end\s*do\s\+\)\@<=\a\w*"
  syn match fortranConstructName "\(\<end\s*if\s\+\)\@<=\a\w*"
  syn match fortranConstructName "\(\<end\s*select\s\+\)\@<=\a\w*"
endif

syn match fortranUnitHeader	"\<end\>"
syn match fortranType		"\<character\>"
syn match fortranType		"\<complex\>"
syn match fortranType		"\<integer\>"
syn keyword fortranType		intrinsic
syn match fortranType		"\<implicit\>"
syn keyword fortranStructure	dimension
syn keyword fortranStorageClass	parameter save
syn match fortranUnitHeader	"\<subroutine\>"
syn keyword fortranCall		call
syn match fortranUnitHeader	"\<function\>"
syn match fortranUnitHeader	"\<program\>"
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syn match fortranUnitHeader	"\<block\>"
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syn keyword fortranKeyword	return stop
syn keyword fortranConditional	else then
syn match fortranConditional	"\<if\>"
syn match fortranConditionalOb	"\<if\s*(.*)\s*\d\+\s*,\s*\d\+\s*,\s*\d\+\s*$"
syn match fortranRepeat		"\<do\>"

syn keyword fortranTodo		contained todo fixme

"Catch errors caused by too many right parentheses
syn region fortranParen transparent start="(" end=")" contains=ALLBUT,fortranParenError,@fortranCommentGroup,cIncluded,@spell
syn match  fortranParenError   ")"

syn match fortranOperator	"\.\s*n\=eqv\s*\."
syn match fortranOperator	"\.\s*\(and\|or\|not\)\s*\."
syn match fortranOperator	"\(+\|-\|/\|\*\)"
syn match fortranTypeOb		"\<character\s*\*"

syn match fortranBoolean	"\.\s*\(true\|false\)\s*\."

syn keyword fortranReadWrite	backspace close endfile inquire open print read rewind write

"If tabs are allowed then the left margin checks do not work
if exists("fortran_have_tabs")
  syn match fortranTab		"\t"  transparent
else
  syn match fortranTab		"\t"
endif

syn keyword fortranIO		access blank direct exist file fmt form formatted iostat name named nextrec number opened rec recl sequential status unformatted unit

syn keyword fortranIntrinsicR		alog alog10 amax0 amax1 amin0 amin1 amod cabs ccos cexp clog csin csqrt dabs dacos dasin datan datan2 dcos dcosh ddim dexp dint dlog dlog10 dmax1 dmin1 dmod dnint dsign dsin dsinh dsqrt dtan dtanh float iabs idim idint idnint ifix isign max0 max1 min0 min1 sngl

" Intrinsics provided by some vendors
syn keyword fortranExtraIntrinsic	algama cdabs cdcos cdexp cdlog cdsin cdsqrt cqabs cqcos cqexp cqlog cqsin cqsqrt dcmplx dconjg derf derfc dfloat dgamma dimag dlgama iqint qabs qacos qasin qatan qatan2 qcmplx qconjg qcos qcosh qdim qerf qerfc qexp qgamma qimag qlgama qlog qlog10 qmax1 qmin1 qmod qnint qsign qsin qsinh qsqrt qtan qtanh

syn keyword fortranIntrinsic	abs acos aimag aint anint asin atan atan2 char cmplx conjg cos cosh exp ichar index int log log10 max min nint sign sin sinh sqrt tan tanh
syn match fortranIntrinsic	"\<len\s*[(,]"me=s+3
syn match fortranIntrinsic	"\<real\s*("me=s+4
syn match fortranType		"\<implicit\s\+real"
syn match fortranType		"^\s*real\>"
syn match fortranIntrinsic	"\<logical\s*("me=s+7
syn match fortranType		"\<implicit\s\+logical"
syn match fortranType		"^\s*logical\>"

"Numbers of various sorts
" Integers
syn match fortranNumber	display "\<\d\+\(_\a\w*\)\=\>"
" floating point number, without a decimal point
syn match fortranFloatIll	display	"\<\d\+[deq][-+]\=\d\+\(_\a\w*\)\=\>"
" floating point number, starting with a decimal point
syn match fortranFloatIll	display	"\.\d\+\([deq][-+]\=\d\+\)\=\(_\a\w*\)\=\>"
" floating point number, no digits after decimal
syn match fortranFloatIll	display	"\<\d\+\.\([deq][-+]\=\d\+\)\=\(_\a\w*\)\=\>"
" floating point number, D or Q exponents
syn match fortranFloatIll	display	"\<\d\+\.\d\+\([dq][-+]\=\d\+\)\=\(_\a\w*\)\=\>"
" floating point number
syn match fortranFloat	display	"\<\d\+\.\d\+\(e[-+]\=\d\+\)\=\(_\a\w*\)\=\>"
" Numbers in formats
syn match fortranFormatSpec	display	"\d*f\d\+\.\d\+"
syn match fortranFormatSpec	display	"\d*e[sn]\=\d\+\.\d\+\(e\d+\>\)\="
syn match fortranFormatSpec	display	"\d*\(d\|q\|g\)\d\+\.\d\+\(e\d+\)\="
syn match fortranFormatSpec	display	"\d\+x\>"
" The next match cannot be used because it would pick up identifiers as well
" syn match fortranFormatSpec	display	"\<\(a\|i\)\d\+"

" Numbers as labels
syn match fortranLabelNumber	display	"^\d\{1,5}\s"me=e-1
syn match fortranLabelNumber	display	"^ \d\{1,4}\s"ms=s+1,me=e-1
syn match fortranLabelNumber	display	"^  \d\{1,3}\s"ms=s+2,me=e-1
syn match fortranLabelNumber	display	"^   \d\d\=\s"ms=s+3,me=e-1
syn match fortranLabelNumber	display	"^    \d\s"ms=s+4,me=e-1

if exists("fortran_more_precise")
  " Numbers as targets
  syn match fortranTarget	display	"\(\<if\s*(.\+)\s*\)\@<=\(\d\+\s*,\s*\)\{2}\d\+\>"
  syn match fortranTarget	display	"\(\<do\s\+\)\@<=\d\+\>"
  syn match fortranTarget	display	"\(\<go\s*to\s*(\=\)\@<=\(\d\+\s*,\s*\)*\d\+\>"
endif

syn keyword fortranTypeR	external
syn keyword fortranIOR		format
syn match fortranKeywordR	"\<continue\>"
syn match fortranKeyword	"^\s*\d\+\s\+continue\>"
syn match fortranKeyword  	"\<go\s*to\>"
syn match fortranKeywordDel  	"\<go\s*to\ze\s\+.*,\s*(.*$"
syn match fortranKeywordOb  	"\<go\s*to\ze\s*(\d\+.*$"
syn region fortranStringR	start=+'+ end=+'+ contains=fortranContinueMark,fortranLeftMargin,fortranSerialNumber
syn keyword fortranIntrinsicR	dim lge lgt lle llt mod
syn keyword fortranKeywordDel	assign pause

syn match fortranType           "\<type\>"
syn keyword fortranType	        none

syn keyword fortranStructure	private public intent optional
syn keyword fortranStructure	pointer target allocatable
syn keyword fortranStorageClass	in out
syn match fortranStorageClass	"\<kind\s*="me=s+4
syn match fortranStorageClass	"\<len\s*="me=s+3

syn match fortranUnitHeader	"\<module\>"
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syn match fortranUnitHeader	"\<submodule\>"
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syn keyword fortranUnitHeader	use only contains
syn keyword fortranUnitHeader	result operator assignment
syn match fortranUnitHeader	"\<interface\>"
syn match fortranUnitHeader	"\<recursive\>"
syn keyword fortranKeyword	allocate deallocate nullify cycle exit
syn match fortranConditional	"\<select\>"
syn keyword fortranConditional	case default where elsewhere

syn match fortranOperator	"\(\(>\|<\)=\=\|==\|/=\|=\)"
syn match fortranOperator	"=>"

syn region fortranString	start=+"+ end=+"+	contains=fortranLeftMargin,fortranContinueMark,fortranSerialNumber
syn keyword fortranIO		pad position action delim readwrite
syn keyword fortranIO		eor advance nml

syn keyword fortranIntrinsic	adjustl adjustr all allocated any associated bit_size btest ceiling count cshift date_and_time digits dot_product eoshift epsilon exponent floor fraction huge iand ibclr ibits ibset ieor ior ishft ishftc lbound len_trim matmul maxexponent maxloc maxval merge minexponent minloc minval modulo mvbits nearest pack precision present product radix random_number random_seed range repeat reshape rrspacing
syn keyword fortranIntrinsic	scale scan selected_int_kind selected_real_kind set_exponent shape size spacing spread sum system_clock tiny transpose trim ubound unpack verify
syn match fortranIntrinsic		"\<not\>\(\s*\.\)\@!"me=s+3
syn match fortranIntrinsic	"\<kind\>\s*[(,]"me=s+4

syn match  fortranUnitHeader	"\<end\s*function"
syn match  fortranUnitHeader	"\<end\s*interface"
syn match  fortranUnitHeader	"\<end\s*module"
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syn match  fortranUnitHeader	"\<end\s*submodule"
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syn match  fortranUnitHeader	"\<end\s*program"
syn match  fortranUnitHeader	"\<end\s*subroutine"
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syn match  fortranUnitHeader	"\<end\s*block"
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syn match  fortranRepeat	"\<end\s*do"
syn match  fortranConditional	"\<end\s*where"
syn match  fortranConditional	"\<select\s*case"
syn match  fortranConditional	"\<end\s*select"
syn match  fortranType	"\<end\s*type"
syn match  fortranType	"\<in\s*out"

syn keyword fortranType	        procedure
syn match  fortranType	        "\<module\ze\s\+procedure\>"
syn keyword fortranIOR		namelist
syn keyword fortranConditionalR	while
syn keyword fortranIntrinsicR	achar iachar transfer

syn keyword fortranInclude		include
syn keyword fortranStorageClassR	sequence

syn match   fortranConditional	"\<end\s*if"
syn match   fortranIO		contains=fortranOperator "\<e\(nd\|rr\)\s*=\s*\d\+"
syn match   fortranConditional	"\<else\s*if"

syn keyword fortranUnitHeaderOb	entry
syn match fortranTypeR		display "double\s\+precision"
syn match fortranTypeR		display "double\s\+complex"
syn match fortranUnitHeaderR	display "block\s\+data"
syn keyword fortranStorageClassR	common equivalence data
syn keyword fortranIntrinsicR	dble dprod
syn match   fortranOperatorR	"\.\s*[gl][et]\s*\."
syn match   fortranOperatorR	"\.\s*\(eq\|ne\)\s*\."

syn keyword fortranRepeat		forall
syn match fortranRepeat		"\<end\s*forall"
syn keyword fortranIntrinsic	null cpu_time
syn match fortranType			"\<elemental\>"
syn match fortranType			"\<pure\>"
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syn match fortranType			"\<impure\>"
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if exists("fortran_more_precise")
  syn match fortranConstructName "\(\<end\s*forall\s\+\)\@<=\a\w*\>"
endif

if b:fortran_dialect == "f08"
  " F2003
  syn keyword fortranIntrinsic        command_argument_count get_command get_command_argument get_environment_variable is_iostat_end is_iostat_eor move_alloc new_line selected_char_kind same_type_as extends_type_of
  " ISO_C_binding
  syn keyword fortranConstant         c_null_char c_alert c_backspace c_form_feed c_new_line c_carriage_return c_horizontal_tab c_vertical_tab
  syn keyword fortranConstant         c_int c_short c_long c_long_long c_signed_char c_size_t c_int8_t c_int16_t c_int32_t c_int64_t c_int_least8_t c_int_least16_t c_int_least32_t c_int_least64_t c_int_fast8_t c_int_fast16_t c_int_fast32_t c_int_fast64_t c_intmax_t C_intptr_t c_float c_double c_long_double c_float_complex c_double_complex c_long_double_complex c_bool c_char c_null_ptr c_null_funptr
  syn keyword fortranIntrinsic        iso_c_binding c_loc c_funloc c_associated  c_f_pointer c_f_procpointer
  syn keyword fortranType             c_ptr c_funptr
  " ISO_Fortran_env
  syn keyword fortranConstant         iso_fortran_env character_storage_size error_unit file_storage_size input_unit iostat_end iostat_eor numeric_storage_size output_unit
  " IEEE_arithmetic
  syn keyword fortranIntrinsic        ieee_arithmetic ieee_support_underflow_control ieee_get_underflow_mode ieee_set_underflow_mode

  syn keyword fortranReadWrite	flush wait
  syn keyword fortranIO 	      decimal round iomsg
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  syn keyword fortranType             asynchronous nopass non_overridable pass protected volatile extends import
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  syn keyword fortranType             non_intrinsic value bind deferred generic final enumerator
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  syn match fortranType               "\<abstract\>"
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  syn match fortranType               "\<class\>"
  syn match fortranType               "\<associate\>"
  syn match fortranType               "\<end\s*associate"
  syn match fortranType               "\<enum\s*,\s*bind\s*(\s*c\s*)"
  syn match fortranType               "\<end\s*enum"
  syn match fortranConditional	"\<select\s*type"
  syn match fortranConditional        "\<type\s*is\>"
  syn match fortranConditional        "\<class\s*is\>"
  syn match fortranUnitHeader         "\<abstract\s*interface\>"
  syn match fortranOperator           "\([\|]\)"

  " F2008
  syn keyword fortranIntrinsic        acosh asinh atanh bessel_j0 bessel_j1 bessel_jn bessel_y0 bessel_y1 bessel_yn erf erfc erfc_scaled gamma log_gamma hypot norm2
  syn keyword fortranIntrinsic        atomic_define atomic_ref execute_command_line leadz trailz storage_size merge_bits
  syn keyword fortranIntrinsic        bge bgt ble blt dshiftl dshiftr findloc iall iany iparity image_index lcobound ucobound maskl maskr num_images parity popcnt poppar shifta shiftl shiftr this_image
  syn keyword fortranIO               newunit
  syn keyword fortranType             contiguous
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  syn keyword fortranRepeat           concurrent
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" CUDA fortran
  syn match fortranTypeCUDA           "\<attributes\>"
  syn keyword fortranTypeCUDA         host global device value
  syn keyword fortranTypeCUDA         shared constant pinned texture
  syn keyword fortranTypeCUDA         dim1 dim2 dim3 dim4
  syn keyword fortranTypeCUDA         cudadeviceprop cuda_count_kind cuda_stream_kind
  syn keyword fortranTypeCUDA         cudaEvent cudaFuncAttributes cudaArrayPtr
  syn keyword fortranTypeCUDA         cudaSymbol cudaChannelFormatDesc cudaPitchedPtr
  syn keyword fortranTypeCUDA         cudaExtent cudaMemcpy3DParms
  syn keyword fortranTypeCUDA         cudaFuncCachePreferNone cudaFuncCachePreferShared
  syn keyword fortranTypeCUDA         cudaFuncCachePreferL1 cudaLimitStackSize
  syn keyword fortranTypeCUDA         cudaLimitPrintfSize cudaLimitMallocHeapSize
  syn keyword fortranTypeCUDA         cudaSharedMemBankSizeDefault cudaSharedMemBankSizeFourByte cudaSharedMemBankSizeEightByte
  syn keyword fortranTypeCUDA         cudaEventDefault cudaEventBlockingSync cudaEventDisableTiming
  syn keyword fortranTypeCUDA         cudaMemcpyHostToDevice cudaMemcpyDeviceToHost
  syn keyword fortranTypeCUDA         cudaMemcpyDeviceToDevice
  syn keyword fortranTypeCUDA         cudaErrorNotReady cudaSuccess cudaErrorInvalidValue
  syn keyword fortranTypeCUDA         c_devptr

  syn match fortranStringCUDA         "blockidx%[xyz]"
  syn match fortranStringCUDA         "blockdim%[xyz]"
  syn match fortranStringCUDA         "griddim%[xyz]"
  syn match fortranStringCUDA         "threadidx%[xyz]"

  syn keyword fortranIntrinsicCUDA    warpsize syncthreads syncthreads_and syncthreads_count syncthreads_or threadfence threadfence_block threadfence_system gpu_time allthreads anythread ballot
  syn keyword fortranIntrinsicCUDA    atomicadd atomicsub atomicmax atomicmin atomicand atomicor atomicxor atomicexch atomicinc atomicdec atomiccas sizeof __shfl __shfl_up __shfl_down __shfl_xor
  syn keyword fortranIntrinsicCUDA    cudaChooseDevice cudaDeviceGetCacheConfig cudaDeviceGetLimit cudaDeviceGetSharedMemConfig cudaDeviceReset cudaDeviceSetCacheConfig cudaDeviceSetLimit cudaDeviceSetSharedMemConfig cudaDeviceSynchronize cudaGetDevice cudaGetDeviceCount cudaGetDeviceProperties cudaSetDevice cudaSetDeviceFlags cudaSetValidDevices
  syn keyword fortranIntrinsicCUDA    cudaThreadExit cudaThreadSynchronize cudaGetLastError cudaGetErrorString cudaPeekAtLastError cudaStreamCreate cudaStreamDestroy cudaStreamQuery cudaStreamSynchronize cudaStreamWaitEvent cudaEventCreate cudaEventCreateWithFlags cudaEventDestroy cudaEventElapsedTime cudaEventQuery cudaEventRecord cudaEventSynchronize
  syn keyword fortranIntrinsicCUDA    cudaFuncGetAttributes cudaFuncSetCacheConfig cudaFuncSetSharedMemConfig cudaSetDoubleForDevice cudaSetDoubleForHost cudaFree cudaFreeArray cudaFreeHost cudaGetSymbolAddress cudaGetSymbolSize
  syn keyword fortranIntrinsicCUDA    cudaHostAlloc cudaHostGetDevicePointer cudaHostGetFlags cudaHostRegister cudaHostUnregister cudaMalloc cudaMallocArray cudaMallocHost cudaMallocPitch cudaMalloc3D cudaMalloc3DArray
  syn keyword fortranIntrinsicCUDA    cudaMemcpy cudaMemcpyArraytoArray cudaMemcpyAsync cudaMemcpyFromArray cudaMemcpyFromSymbol cudaMemcpyFromSymbolAsync cudaMemcpyPeer cudaMemcpyPeerAsync cudaMemcpyToArray cudaMemcpyToSymbol cudaMemcpyToSymbolAsync cudaMemcpy2D cudaMemcpy2DArrayToArray cudaMemcpy2DAsync cudaMemcpy2DFromArray cudaMemcpy2DToArray cudaMemcpy3D cudaMemcpy3DAsync
  syn keyword fortranIntrinsicCUDA    cudaMemGetInfo cudaMemset cudaMemset2D cudaMemset3D cudaDeviceCanAccessPeer cudaDeviceDisablePeerAccess cudaDeviceEnablePeerAccess cudaPointerGetAttributes cudaDriverGetVersion cudaRuntimeGetVersion

  syn region none matchgroup=fortranType start="<<<" end=">>>" contains=ALLBUT,none
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endif

syn cluster fortranCommentGroup contains=fortranTodo

if (b:fortran_fixed_source == 1)
  if !exists("fortran_have_tabs")
    "Flag items beyond column 72
    syn match fortranSerialNumber	excludenl "^.\{73,}$"lc=72
    "Flag left margin errors
    syn match fortranLabelError	"^.\{-,4}[^0-9 ]" contains=fortranTab
    syn match fortranLabelError	"^.\{4}\d\S"
  endif
  syn match fortranComment		excludenl "^[!c*].*$" contains=@fortranCommentGroup,@spell
  syn match fortranLeftMargin		transparent "^ \{5}"
  syn match fortranContinueMark		display "^.\{5}\S"lc=5
else
  syn match fortranContinueMark		display "&"
endif

syn match fortranComment	excludenl "!.*$" contains=@fortranCommentGroup,@spell
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syn match fortranOpenMP		excludenl 		"^\s*!\$\(OMP\)\=&\=\s.*$"
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"cpp is often used with Fortran
syn match	cPreProc		"^\s*#\s*\(define\|ifdef\)\>.*"
syn match	cPreProc		"^\s*#\s*\(elif\|if\)\>.*"
syn match	cPreProc		"^\s*#\s*\(ifndef\|undef\)\>.*"
syn match	cPreCondit		"^\s*#\s*\(else\|endif\)\>.*"
syn region	cIncluded	contained start=+"[^(]+ skip=+\\\\\|\\"+ end=+"+ contains=fortranLeftMargin,fortranContinueMark,fortranSerialNumber
syn match	cIncluded		contained "<[^>]*>"
syn match	cInclude		"^\s*#\s*include\>\s*["<]" contains=cIncluded

"Synchronising limits assume that comment and continuation lines are not mixed
if exists("fortran_fold") || exists("fortran_more_precise")
  syn sync fromstart
elseif (b:fortran_fixed_source == 0)
  syn sync linecont "&" minlines=30
else
  syn sync minlines=30
endif

if exists("fortran_fold")

  if (b:fortran_fixed_source == 1)
    syn region fortranProgram transparent fold keepend start="^\s*program\s\+\z(\a\w*\)" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*\(program\(\s\+\z1\>\)\=\|$\)" contains=ALLBUT,fortranModule
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    syn region fortranModule transparent fold keepend start="^\s*submodule\s\+(\a\w*\s*\(:\a\w*\s*\)*)\s*\z\(\a\w*\)" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*\(submodule\(\s\+\z1\>\)\=\|$\)" contains=ALLBUT,fortranProgram,fortranModule
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    syn region fortranModule transparent fold keepend start="^\s*module\s\+\(procedure\)\@!\z(\a\w*\)" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*\(module\(\s\+\z1\>\)\=\|$\)" contains=ALLBUT,fortranProgram
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    syn region fortranFunction transparent fold keepend extend start="^\s*\(elemental \|pure \|impure \|module \|recursive \)\=\s*\(\(\(real \|integer \|logical \|complex \|double \s*precision \)\s*\((\(\s*kind\s*=\)\=\s*\w\+\s*)\)\=\)\|type\s\+(\s*\w\+\s*) \|character \((\(\s*len\s*=\)\=\s*\d\+\s*)\|(\(\s*kind\s*=\)\=\s*\w\+\s*)\)\=\)\=\s*function\s\+\z(\a\w*\)" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*\($\|function\(\s\+\z1\>\)\=\)" contains=ALLBUT,fortranProgram,fortranModule
    syn region fortranSubroutine transparent fold keepend extend start="^\s*\(elemental \|pure \|impure \|module \|recursive \)\=\s*subroutine\s\+\z(\a\w*\)" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*\($\|subroutine\(\s\+\z1\>\)\=\)" contains=ALLBUT,fortranProgram,fortranModule
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    syn region fortranBlockData transparent fold keepend start="\<block\s*data\(\s\+\z(\a\w*\)\)\=" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*\($\|block\s*data\(\s\+\z1\>\)\=\)" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortran77Loop,fortranCase,fortran90Loop,fortranIfBlock
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    syn region fortranAssociate transparent fold keepend start="^\s*\<associate\s\+" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*associate" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
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    syn region fortranInterface transparent fold keepend extend start="^\s*\(abstract \)\=\s*interface\>" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*interface\>" contains=ALLBUT,fortranProgram,fortranModule,fortran77Loop,fortranCase,fortran90Loop,fortranIfBlock
    syn region fortranTypeDef transparent fold keepend extend start="^\s*type\s*\(,\s*\(public\|private\|abstract\)\)\=\s*::" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*type\>" contains=ALLBUT,fortranProgram,fortranModule,fortran77Loop,fortranCase,fortran90Loop,fortranIfBlock,fortranInterface
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  else
    syn region fortranProgram transparent fold keepend start="^\s*program\s\+\z(\a\w*\)" skip="^\s*[!#].*$" excludenl end="\<end\s*\(program\(\s\+\z1\>\)\=\|$\)" contains=ALLBUT,fortranModule
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    syn region fortranModule transparent fold keepend start="^\s*submodule\s\+(\a\w*\s*\(:\a\w*\s*\)*)\s*\z\(\a\w*\)" skip="^\s*[!#].*$" excludenl end="\<end\s*\(submodule\(\s\+\z1\>\)\=\|$\)" contains=ALLBUT,fortranProgram,fortranModule
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    syn region fortranModule transparent fold keepend start="^\s*module\s\+\(procedure\)\@!\z(\a\w*\)" skip="^\s*[!#].*$" excludenl end="\<end\s*\(module\(\s\+\z1\>\)\=\|$\)" contains=ALLBUT,fortranProgram
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    syn region fortranFunction transparent fold keepend extend start="^\s*\(elemental \|pure \|impure \|module \|recursive \)\=\s*\(\(\(real \|integer \|logical \|complex \|double \s*precision \)\s*\((\(\s*kind\s*=\)\=\s*\w\+\s*)\)\=\)\|type\s\+(\s*\w\+\s*) \|character \((\(\s*len\s*=\)\=\s*\d\+\s*)\|(\(\s*kind\s*=\)\=\s*\w\+\s*)\)\=\)\=\s*function\s\+\z(\a\w*\)" skip="^\s*[!#].*$" excludenl end="\<end\s*\($\|function\(\s\+\z1\>\)\=\)" contains=ALLBUT,fortranProgram,fortranModule
    syn region fortranSubroutine transparent fold keepend extend start="^\s*\(elemental \|pure \|impure \|module \|recursive \)\=\s*subroutine\s\+\z(\a\w*\)" skip="^\s*[!#].*$" excludenl end="\<end\s*\($\|subroutine\(\s\+\z1\>\)\=\)" contains=ALLBUT,fortranProgram,fortranModule
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    syn region fortranBlockData transparent fold keepend start="\<block\s*data\(\s\+\z(\a\w*\)\)\=" skip="^\s*[!#].*$" excludenl end="\<end\s*\($\|block\s*data\(\s\+\z1\>\)\=\)" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortran77Loop,fortranCase,fortran90Loop,fortranIfBlock
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    syn region fortranAssociate transparent fold keepend start="^\s*\<associate\s\+" skip="^\s*[!#].*$" excludenl end="\<end\s*associate" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
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    syn region fortranInterface transparent fold keepend extend start="^\s*\(abstract \)\=\s*interface\>" skip="^\s*[!#].*$" excludenl end="\<end\s*interface\>" contains=ALLBUT,fortranProgram,fortranModule,fortran77Loop,fortranCase,fortran90Loop,fortranIfBlock
    syn region fortranTypeDef transparent fold keepend extend start="^\s*type\s*\(,\s*\(public\|private\|abstract\)\)\=\s*::" skip="^\s*[!#].*$" excludenl end="\<end\s*type\>" contains=ALLBUT,fortranProgram,fortranModule,fortran77Loop,fortranCase,fortran90Loop,fortranIfBlock,fortranInterface
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  endif

  if exists("fortran_fold_conditionals")
    if (b:fortran_fixed_source == 1)
      syn region fortran77Loop transparent fold keepend start="\<do\s\+\z(\d\+\)" end="^\s*\z1\>" contains=ALLBUT,fortranUnitHeader,fortranStructure,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
      syn region fortran90Loop transparent fold keepend extend start="\(\<end\s\+\)\@<!\<do\(\s\+\a\|\s*$\)" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*do\>" contains=ALLBUT,fortranUnitHeader,fortranStructure,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
      syn region fortranIfBlock transparent fold keepend extend start="\(\<e\(nd\|lse\)\s\+\)\@<!\<if\s*(.\+)\s*then\>" skip="^\([!c*]\|\s*#\).*$" end="\<end\s*if\>" contains=ALLBUT,fortranUnitHeader,fortranStructure,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
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      syn region fortranCase transparent fold keepend extend start="\<select\s*\(case\|type\)\>" skip="^\([!c*]\|\s*#\).*$" end="\<end\s*select\>" contains=ALLBUT,fortranUnitHeader,fortranStructure,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
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    else
      syn region fortran77Loop transparent fold keepend start="\<do\s\+\z(\d\+\)" end="^\s*\z1\>" contains=ALLBUT,fortranUnitHeader,fortranStructure,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
      syn region fortran90Loop transparent fold keepend extend start="\(\<end\s\+\)\@<!\<do\(\s\+\a\|\s*$\)" skip="^\s*[!#].*$" excludenl end="\<end\s*do\>" contains=ALLBUT,fortranUnitHeader,fortranStructure,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
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      syn region fortranIfBlock transparent fold keepend extend start="\(\<e\(nd\|lse\)\s\+\)\@<!\<if\s*(\(.\|&\s*\n\)\+)\(\s\|&\s*\n\)*then\>" skip="^\s*[!#].*$" end="\<end\s*if\>" contains=ALLBUT,fortranUnitHeader,fortranStructure,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
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      syn region fortranCase transparent fold keepend extend start="\<select\s*\(case\|type\)\>" skip="^\s*[!#].*$" end="\<end\s*select\>" contains=ALLBUT,fortranUnitHeader,fortranStructure,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
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    endif
  endif

  if exists("fortran_fold_multilinecomments")
    if (b:fortran_fixed_source == 1)
      syn match fortranMultiLineComments transparent fold "\(^[!c*].*\(\n\|\%$\)\)\{4,}" contains=ALLBUT,fortranMultiCommentLines
    else
      syn match fortranMultiLineComments transparent fold "\(^\s*!.*\(\n\|\%$\)\)\{4,}" contains=ALLBUT,fortranMultiCommentLines
    endif
  endif
endif

" Define the default highlighting.
" The default highlighting differs for each dialect.
" Transparent groups:
" fortranParen, fortranLeftMargin
" fortranProgram, fortranModule, fortranSubroutine, fortranFunction,
" fortranBlockData
" fortran77Loop, fortran90Loop, fortranIfBlock, fortranCase
" fortranMultiCommentLines
hi def link fortranKeyword 	Keyword
hi def link fortranConstructName	Identifier
hi def link fortranConditional	Conditional
hi def link fortranRepeat	Repeat
hi def link fortranTodo		Todo
hi def link fortranContinueMark	Special
hi def link fortranString	String
hi def link fortranNumber	Number
hi def link fortranOperator	Operator
hi def link fortranBoolean	Boolean
hi def link fortranLabelError	Error
hi def link fortranObsolete	Todo
hi def link fortranType		Type
hi def link fortranStructure	Type
hi def link fortranStorageClass	StorageClass
hi def link fortranCall		Function
hi def link fortranUnitHeader	fortranPreCondit
hi def link fortranReadWrite	Keyword
hi def link fortranIO		Keyword
hi def link fortranIntrinsic	Function
hi def link fortranConstant	Constant

" To stop deleted & obsolescent features being highlighted as Todo items,
" comment out the next 5 lines and uncomment the 5 lines after that
hi def link fortranUnitHeaderOb    fortranObsolete
hi def link fortranKeywordOb       fortranObsolete
hi def link fortranConditionalOb   fortranObsolete
hi def link fortranTypeOb          fortranObsolete
hi def link fortranKeywordDel      fortranObsolete
"hi def link fortranUnitHeaderOb    fortranUnitHeader
"hi def link fortranKeywordOb       fortranKeyword
"hi def link fortranConditionalOb   fortranConditional
"hi def link fortranTypeOb          fortranType
"hi def link fortranKeywordDel      fortranKeyword

if b:fortran_dialect == "F"
  hi! def link fortranIntrinsicR	fortranObsolete
  hi! def link fortranUnitHeaderR	fortranObsolete
  hi! def link fortranTypeR		fortranObsolete
  hi! def link fortranStorageClassR	fortranObsolete
  hi! def link fortranOperatorR 	fortranObsolete
  hi! def link fortranInclude   	fortranObsolete
  hi! def link fortranLabelNumber	fortranObsolete
  hi! def link fortranTarget	        fortranObsolete
  hi! def link fortranFloatIll	        fortranObsolete
  hi! def link fortranIOR		fortranObsolete
  hi! def link fortranKeywordR	        fortranObsolete
  hi! def link fortranStringR	        fortranObsolete
  hi! def link fortranConditionalR	fortranObsolete
else
  hi! def link fortranIntrinsicR	fortranIntrinsic
  hi! def link fortranUnitHeaderR	fortranPreCondit
  hi! def link fortranTypeR		fortranType
  hi! def link fortranStorageClassR	fortranStorageClass
  hi! def link fortranOperatorR	        fortranOperator
  hi! def link fortranInclude	        Include
  hi! def link fortranLabelNumber	Special
  hi! def link fortranTarget	        Special
  hi! def link fortranFloatIll	        fortranFloat
  hi! def link fortranIOR		fortranIO
  hi! def link fortranKeywordR	        fortranKeyword
  hi! def link fortranStringR	        fortranString
  hi! def link fortranConditionalR	fortranConditional
endif

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" CUDA
hi def link fortranIntrinsicCUDA        fortranIntrinsic
hi def link fortranTypeCUDA             fortranType
hi def link fortranStringCUDA           fortranString

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hi def link fortranFormatSpec	Identifier
hi def link fortranFloat	Float
hi def link fortranPreCondit	PreCondit
hi def link cIncluded		fortranString
hi def link cInclude		Include
hi def link cPreProc		PreProc
hi def link cPreCondit		PreCondit
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hi def link fortranOpenMP       PreProc
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hi def link fortranParenError	Error
hi def link fortranComment	Comment
hi def link fortranSerialNumber	Todo
hi def link fortranTab		Error

" Uncomment the next line if you use extra intrinsics provided by vendors
"hi def link fortranExtraIntrinsic	Function

let b:current_syntax = "fortran"

let &cpo = s:cpo_save
unlet s:cpo_save
" vim: ts=8 tw=132