runtime(fortran): syntax and documentation updates (#13811)

closes: #13802

Signed-off-by: Ajit-Thakkar <142174202+Ajit-Thakkar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index bc833b11fcdf51c37af0570ff9f3eecfaeb2d24d..e3cac2e2487f35664c6603b6774ff2190d14f3de 100644 (file)
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1677,27 +1677,19 @@ placed prior to the :syntax on command.  Unfortunately, the use of tabs will
 mean that the syntax file will not be able to detect incorrect margins.
 
 Syntax folding of Fortran files ~
-If you wish to use foldmethod=syntax, then you must first set the variable
-fortran_fold with a command such as >
+Vim will fold your file using foldmethod=syntax, if you set the variable
+fortran_fold in your .vimrc with a command such as >
     :let fortran_fold=1
 to instruct the syntax script to define fold regions for program units, that
 is main programs starting with a program statement, subroutines, function
-subprograms, modules, submodules, and block data units. Block, interface,
-associate, critical, type definition, and change team constructs will also be
-folded.  If you also set the variable fortran_fold_conditionals with a command
-such as >
+subprograms, modules, submodules, blocks of comment lines, and block data
+units. Block, interface, associate, critical, type definition, and change team
+constructs will also be folded.  If you also set the variable
+fortran_fold_conditionals with a command such as >
     :let fortran_fold_conditionals=1
 then fold regions will also be defined for do loops, if blocks, select case,
-select type, and select rank constructs.  If you also set the variable
-fortran_fold_multilinecomments with a command such as >
-    :let fortran_fold_multilinecomments=1
-then fold regions will also be defined for three or more consecutive comment
-lines.  Note that defining fold regions can be slow for large files.
-
-If fortran_fold, and possibly fortran_fold_conditionals and/or
-fortran_fold_multilinecomments, have been set, then vim will fold your file.
-Comments or blank lines placed between two program units are not folded
-because they are seen as not belonging to any program unit.
+select type, and select rank constructs.  Note that defining fold regions can
+be slow for large files.
 
 The syntax/fortran.vim script contains embedded comments that tell you how to
 comment and/or uncomment some lines to (a) activate recognition of some

diff --git a/runtime/syntax/fortran.vim b/runtime/syntax/fortran.vim
index 99e11528de878f5ce6d4cfe7294c267bee0efda9..1fb8a1c424b8e529f0039332c4468b01568e0434 100644 (file)
--- a/runtime/syntax/fortran.vim
+++ b/runtime/syntax/fortran.vim
@@ -1,6 +1,6 @@
 " Vim syntax file
 " Language:    Fortran 2023 (and Fortran 2018, 2008, 2003, 95, 90, and 77)
-" Version:     (v109) 2023 December 29
+" Version:     (v110) 2024 January 03
 " Maintainers: Ajit J. Thakkar <ajit@unb.ca>; <https://ajit.ext.unb.ca/>
 "              Joshua Hollett <j.hollett@uwinnipeg.ca>
 " Usage:       For instructions, do :help fortran-syntax from Vim
@@ -68,18 +68,18 @@ if b:fortran_fixed_source == 1
 else
   syn match fortranConstructName       "^\s*\zs\a\w*\ze\s*:"
 endif
-syn match fortranConstructName          "\(\<end\s*do\s\+\)\@11<=\a\w*"
-syn match fortranConstructName          "\(\<end\s*if\s\+\)\@11<=\a\w*"
-syn match fortranConstructName          "\(\<end\s*select\s\+\)\@15<=\a\w*"
-syn match fortranConstructName          "\(\<end\s*where\s\+\)\@14<=\a\w*"
-syn match fortranConstructName          "\(\<end\s*block\s\+\)\@14<=\a\w*"
-syn match fortranConstructName          "\(\<\%(exit\|cycle\)\s\+\)\@11<=\a\w*"
-syn match fortranConstructName          "\(\<end\s*forall\s\+\)\@15<=\a\w*\>"
-syn match fortranConstructName          "\(\<end\s*critical\s\+\)\@17<=\a\w*\>"
-syn match fortranConstructName          "\(\<end\s*associate\s\+\)\@18<=\a\w*\>"
-
-syn match fortranUnitName               "\(\(end\s*\)\?\(subroutine\|function\|module\|program\|submodule\)\s\+\)\@12<=\a\w\+"
-syn match fortranUnitHeader             "\<end\s*$"
+syn match fortranConstructName          "\%(\<end\s*do\s\+\)\@11<=\a\w*"
+syn match fortranConstructName          "\%(\<end\s*if\s\+\)\@11<=\a\w*"
+syn match fortranConstructName          "\%(\<end\s*select\s\+\)\@15<=\a\w*"
+syn match fortranConstructName          "\%(\<end\s*where\s\+\)\@14<=\a\w*"
+syn match fortranConstructName          "\%(\<end\s*block\s\+\)\@14<=\a\w*"
+syn match fortranConstructName          "\%(\<\%(exit\|cycle\)\s\+\)\@11<=\a\w*"
+syn match fortranConstructName          "\%(\<end\s*forall\s\+\)\@15<=\a\w*\>"
+syn match fortranConstructName          "\%(\<end\s*critical\s\+\)\@17<=\a\w*\>"
+syn match fortranConstructName          "\%(\<end\s*associate\s\+\)\@18<=\a\w*\>"
+
+syn match fortranUnitName               "\%(\<\%(end\s*\)\?\%(subroutine\|function\|module\|program\|submodule\)\s\+\)\@12<=\a\w\+"
+syn match fortranUnitHeader             "\<end\>\ze\s*\%(!.*\)\?$"
 
 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 keyword fortranIntrinsicR  achar iachar transfer dble dprod dim lge lgt lle llt mod
@@ -91,7 +91,7 @@ syn keyword fortranIntrinsic    dot_product eoshift exponent floor fraction iand
 syn keyword fortranIntrinsic    modulo mvbits nearest pack precision present radix random_number random_seed range repeat reshape rrspacing scale scan set_exponent shape size spacing
 "syn keyword fortranIntrinsic    count epsilon maxval minval product sum huge tiny
 " intrinsic names often used for variables in older Fortran code
-syn match fortranIntrinsic      '\<\(count\|epsilon\|maxval\|minval\|product\|sum\|huge\|tiny\)\>\ze\s*('
+syn match fortranIntrinsic      '\<\%(count\|epsilon\|maxval\|minval\|product\|sum\|huge\|tiny\)\>\ze\s*('
 syn keyword fortranIntrinsic    spread system_clock transpose trim ubound unpack verify
 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
@@ -116,30 +116,30 @@ syn keyword fortranExtraIntrinsic algama cdabs cdcos cdexp cdlog cdsin cdsqrt cq
 
 syn keyword fortranType         generic final enumerator import
 syn keyword fortranType         c_ptr c_funptr elemental pure impure recursive non_recursive
-syn match fortranTypeOb         "^\s*\(character\s*\)\@15<=\*"
-syn match fortranType           "^\s*\(implicit \)\?\s*\(real\|integer\|logical\|complex\|character\|type\)\>"
-syn match fortranType           "^\s*implicit\s\+none"
-syn match fortranType           "\(class\|type\)\(of\)\?"
-syn match fortranType           "\(end\s*\)\?\<interface\>"
+syn match fortranTypeOb         "^\s*\zs\%(character\s*\)\@15<=\*"
+syn match fortranType           "^\s*\zs\%(implicit\s\+\)\?\%(real\|integer\|logical\|complex\|character\|type\)\>"
+syn match fortranType           "^\s*\zsimplicit\s\+none\>"
+syn match fortranType           "\<\%(class\|type\)\%(of\)\?\>"
+syn match fortranType           "\<\%(end\s*\)\?interface\>"
 syn match fortranType           "\<enum\s*,\s*bind\s*(\s*c\s*)"
-syn match fortranType           "\<end\s*\(enum\|type\)\>"
-syn match fortranType           "\(end\s*\)\?enumeration\s\+type"
-syn match fortranType           "\(end\s*\)\?\(\<module\s\+\)\?procedure\>"
-syn match fortranTypeR         display "double\s*precision"
-syn match fortranTypeR         display "double\s\+complex"
+syn match fortranType           "\<end\s*\%(enum\|type\)\>"
+syn match fortranType           "\<\%(end\s*\)\?enumeration\s\+type"
+syn match fortranType           "\<\%(end\s*\)\?\%(module\s\+\)\?procedure\>"
+syn match fortranTypeR         display "\<double\s*precision\>"
+syn match fortranTypeR         display "\<double\s\+complex\>"
 syn keyword fortranAttribute    value bind deferred contiguous intrinsic non_intrinsic
 syn keyword fortranAttribute    asynchronous nopass non_overridable pass volatile extends
 syn keyword fortranAttribute    abstract external private public protected intent optional
 syn keyword fortranAttribute   pointer target allocatable dimension codimension sequence parameter save
 
 syn keyword fortranUnitHeader  result operator assignment
-syn match fortranUnitHeader     "\<\(end\s*\)\?\(subroutine\|function\|module\|program\|submodule\)\>"
-syn match fortranBlock          "\<\(end\s*\)\?\(block\|critical\|associate\)\>"
-syn match fortranCalled                "\(call\s\+\)\@7<=\a\w*"
+syn match fortranUnitHeader     "\<\%(end\s*\)\?\%(subroutine\|function\|module\|program\|submodule\)\>"
+syn match fortranBlock          "\<\%(end\s*\)\?\%(block\|critical\|associate\)\>"
+syn match fortranCalled                "\<\%(call\s\+\)\@7<=\a\w*"
 syn match fortranRepeat                "\<do\>"
 syn keyword fortranRepeat       concurrent
 syn keyword fortranRepeatR     while
-syn match fortranRepeat         "\<end\s*do"
+syn match fortranRepeat         "\<end\s*do\>"
 syn keyword fortranRepeatOb    forall
 syn match fortranRepeatOb      "\<end\s*forall\>"
 
@@ -150,16 +150,16 @@ syn region fortranParen transparent start="(" end=")" contains=ALLBUT,fortranPar
 syn match  fortranParenError   ")"
 
 syn match fortranOperator      "\.\s*n\=eqv\s*\."
-syn match fortranOperator      "\.\s*\(and\|or\|not\)\s*\."
-syn match fortranOperator      "\(+\|-\|/\|\*\)"
-syn match fortranOperator      "\(\(>\|<\)=\=\|==\|/=\|=\)"
-syn match fortranOperator      "\(%\|?\|=>\)"
-syn match fortranOperator       "\([\|]\)"
+syn match fortranOperator      "\.\s*\%(and\|or\|not\)\s*\."
+syn match fortranOperator      "\%(+\|-\|/\|\*\)"
+syn match fortranOperator      "\%(\%(>\|<\)=\=\|==\|/=\|=\)"
+syn match fortranOperator      "\%(%\|?\|=>\)"
+syn match fortranOperator       "\%([\|]\)"
 syn match fortranOperatorR     "\.\s*[gl][et]\s*\."
-syn match fortranOperatorR     "\.\s*\(eq\|ne\)\s*\."
+syn match fortranOperatorR     "\.\s*\%(eq\|ne\)\s*\."
 
 syn keyword fortranReadWrite   print flush
-syn match fortranReadWrite     '\<\(backspace\|close\|endfile\|inquire\|open\|read\|rewind\|write\)\ze\s*('
+syn match fortranReadWrite     '\<\%(backspace\|close\|endfile\|inquire\|open\|read\|rewind\|write\)\ze\s*('
 
 "If tabs are allowed then the left margin checks do not work
 if exists("fortran_have_tabs")
@@ -170,17 +170,17 @@ endif
 
 "Numbers of various sorts
 " Integers
-syn match fortranNumber        display "\<\d\+\(_\a\w*\)\=\>"
+syn match fortranNumber        display "\<\d\+\%(_\a\w*\)\=\>"
 " floating point number, without a decimal point
-syn match fortranFloatIll      display "\<\d\+[deq][-+]\=\d\+\(_\a\w*\)\=\>"
+syn match fortranFloatIll      display "\<\d\+[deq][-+]\=\d\+\%(_\a\w*\)\=\>"
 " floating point number, starting with a decimal point
-syn match fortranFloatIll      display "\.\d\+\([deq][-+]\=\d\+\)\=\(_\a\w*\)\=\>"
+syn match fortranFloatIll      display "\.\d\+\%([deq][-+]\=\d\+\)\=\%(_\a\w*\)\=\>"
 " floating point number, no digits after decimal
-syn match fortranFloatIll      display "\<\d\+\.\([deq][-+]\=\d\+\)\=\(_\a\w*\)\=\>"
+syn match fortranFloatIll      display "\<\d\+\.\%([deq][-+]\=\d\+\)\=\%(_\a\w*\)\=\>"
 " floating point number, D or Q exponents
-syn match fortranFloatIll      display "\<\d\+\.\d\+\([dq][-+]\=\d\+\)\=\(_\a\w*\)\=\>"
+syn match fortranFloatIll      display "\<\d\+\.\d\+\%([dq][-+]\=\d\+\)\=\%(_\a\w*\)\=\>"
 " floating point number
-syn match fortranFloat display "\<\d\+\.\d\+\(e[-+]\=\d\+\)\=\(_\a\w*\)\=\>"
+syn match fortranFloat display "\<\d\+\.\d\+\%(e[-+]\=\d\+\)\=\%(_\a\w*\)\=\>"
 " binary number
 syn match fortranBinary        display "b["'][01]\+["']"
 " octal number
@@ -189,30 +189,29 @@ syn match fortranOctal    display "o["'][0-7]\+["']"
 syn match fortranHex   display "z["'][0-9A-F]\+["']"
 " 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*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\+"
+" 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
+syn match fortranLabelNumber   display "^\zs\d\{1,5}\ze\s"
+syn match fortranLabelNumber   display "^ \zs\d\{1,4}\ze\s"
+syn match fortranLabelNumber   display "^  \zs\d\{1,3}\ze\s"
+syn match fortranLabelNumber   display "^   \zs\d\d\=\ze\s"
+syn match fortranLabelNumber   display "^    \zs\d\ze\s"
 " Numbers as targets
-syn match fortranTarget        display "\(\<if\s*(.\+)\s*\)\@<=\(\d\+\s*,\s*\)\{2}\d\+\>"
-syn match fortranTarget        display "\(\<do\s\+\)\@11<=\d\+\>"
-syn match fortranTarget        display "\(\<go\s*to\s*(\=\)\@11<=\(\d\+\s*,\s*\)*\d\+\>"
+syn match fortranTarget        display "\%(\<if\s*(.\+)\s*\)\@<=\%(\d\+\s*,\s*\)\{2}\d\+\>"
+syn match fortranTarget        display "\%(\<do\s\+\)\@11<=\d\+\>"
+syn match fortranTarget        display "\%(\<go\s*to\s*(\=\)\@11<=\%(\d\+\s*,\s*\)*\d\+\>"
 
-syn match fortranBoolean       "\.\s*\(true\|false\)\s*\."
+syn match fortranBoolean       "\.\s*\%(true\|false\)\s*\."
 
-syn match fortranKeyword       "call"
+syn keyword fortranKeyword     call
 syn keyword fortranKeyword     use only contains
-syn match fortranKeyword        "fail\s\+image\>"
-syn match fortranKeyword       "\(error\s\+\)\=stop"
-syn match fortranKeyword       "\<continue\>"
-syn match fortranKeyword       "^\s*\d\+\s\+continue\>"
+syn match fortranKeyword        "\<fail\s\+image\>"
+syn match fortranKeyword       "\<\%(error\s\+\)\=stop\>"
+syn keyword fortranKeyword     continue
 syn match fortranKeyword       "\<go\s*to\>"
 syn match fortranKeywordDel    "\<go\s*to\ze\s\+.*,\s*(.*$"
 syn match fortranKeywordOb     "\<go\s*to\ze\s*(\d\+.*$"
@@ -222,40 +221,40 @@ syn keyword fortranKeyword        allocate deallocate nullify return cycle exit
 syn region fortranString       start=+'+ end=+'+       contains=fortranLeftMargin,fortranContinueMark,fortranSerialNumber
 syn region fortranString       start=+"+ end=+"+       contains=fortranLeftMargin,fortranContinueMark,fortranSerialNumber
 
-syn match fortranIO            '\%(\((\|,\|, *&\n\)\s*\)\@<=\(access\|blank\|direct\|exist\|file\|fmt\|form\|formatted\|iostat\|name\|named\|nextrec\|number\|opened\|rec\|recl\|sequential\|status\|unformatted\|unit\)\ze\s*='
+syn match fortranIO            '\%(\%((\|,\|, *&\n\)\s*\)\@<=\%(access\|blank\|direct\|exist\|file\|fmt\|form\|formatted\|iostat\|name\|named\|nextrec\|number\|opened\|rec\|recl\|sequential\|status\|unformatted\|unit\)\ze\s*='
 syn keyword fortranIOR         format namelist
 syn keyword fortranIO          pad position action delim readwrite
 syn keyword fortranIO          eor advance nml
 syn keyword fortranIO           newunit decimal round iomsg
-syn match   fortranIO          contains=fortranOperator "\<e\(nd\|rr\)\s*=\s*\d\+"
+syn match   fortranIO          contains=fortranOperator "\<e\%(nd\|rr\)\s*=\s*\d\+"
 
 syn keyword fortranConditional else then where elsewhere
 syn match fortranConditional    "\<if\>"
-syn match fortranConditional    "\<else\s*if"
-syn match fortranConditional    "\(end\s*\)\?\(if\|where\|select\)"
-syn match fortranConditional    "\<select\s\+\(case\|rank\|type\)"
-syn match fortranConditional    "\(class\|type\)\s\+is\>"
-syn match fortranConditional    "\(case\|rank\)\(\s\+default\)\?"
+syn match fortranConditional    "\<else\s*if\>"
+syn match fortranConditional    "\<\%(end\s*\)\?\%(if\|where\|select\)\>"
+syn match fortranConditional    "\<select\s\+\%(case\|rank\|type\)\>"
+syn match fortranConditional    "\<\%(class\|type\)\s\+is\>"
+syn match fortranConditional    "\<\%(case\|rank\)\%(\s\+default\)\?\>"
 syn match fortranConditionalDel        "\<if\s*(.*)\s*\d\+\s*,\s*\d\+\s*,\s*\d\+\s*$"
 
 syn keyword fortranInclude             include
 
-syn match fortranImageControl   "sync\s\+\(all\|images\|memory\|team\)\>"
-syn match fortranImageControl   "\(change\|form\|end\)\s\+team\>"
-syn match fortranImageControl   "event\s\+\(post\|wait\)"
-syn match fortranImageControl   "\(un\)\?lock\ze\s*("
-syn match fortranImageControl   "notify\s\+wait\ze\s*("
+syn match fortranImageControl   "\<sync\s\+\%(all\|images\|memory\|team\)\>"
+syn match fortranImageControl   "\<\%(change\|form\|end\)\s\+team\>"
+syn match fortranImageControl   "\<event\s\+\%(post\|wait\)"
+syn match fortranImageControl   "\<\%(un\)\?lock\ze\s*("
+syn match fortranImageControl   "\<notify\s\+wait\ze\s*("
 
 syn keyword fortranUnitHeaderOb        entry
-syn match fortranUnitHeaderOb  display "block\s*data"
+syn match fortranUnitHeaderOb  display "\<block\s*data\>"
 
 syn keyword fortranStorageClass                in out
 syn match  fortranStorageClass          "\<in\s*out\>"
 syn match fortranStorageClass           "\<kind\s*="me=s+4
 syn match fortranStorageClass           "\<len\s*="me=s+3
-syn match fortranStorageClass           "^\s*data\>\(\s\+\a\w*\s*/\)\@="
-syn match fortranStorageClassOb         "^\s*common\>"
-syn match fortranStorageClassOb         "^\s*common\>\(\s*/\)\@="
+syn match fortranStorageClass           "^\s*\zsdata\>\%(\s\+\a\w*\s*/\)\@="
+syn match fortranStorageClassOb         "^\s*\zscommon\>"
+syn match fortranStorageClassOb         "^\s*\zscommon\>\%(\s*/\)\@="
 syn keyword fortranStorageClassOb      equivalence
 
 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
@@ -284,10 +283,10 @@ if exists("fortran_CUDA")
   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 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
@@ -325,14 +324,14 @@ else
 endif
 
 syn match fortranComment       excludenl "!.*$" contains=@fortranCommentGroup,@spell
-syn match fortranOpenMP                excludenl               "^\s*!\$\(OMP\)\=&\=\s.*$"
+syn match fortranOpenMP                excludenl               "^\s*\zs!\$\%(OMP\)\=&\=\s.*$"
 syn match fortranEndStatement   display ";"
 
 "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 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 region    cIncluded               contained start=+"[^("]+ skip=+\\\\\|\\"+ end=+"+
 syn match      cIncluded               contained "<[^>]*>"
@@ -353,61 +352,50 @@ if exists("fortran_fold")
     setlocal foldmethod=syntax
   endif
   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
-    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
-    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
-    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
+    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
+    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
+    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
+    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
     syn region fortranBlockData transparent fold keepend start="\<block\>" skip="^\s*[!#].*$" excludenl end="\<end\s*block\>" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortran77Loop,fortranCase,fortran90Loop,fortranIfBlock
-    syn region fortranAssociate transparent fold keepend start="^\s*\<associate\s\+" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*associate" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
-    syn region fortranCritical transparent fold keepend start="^\s*\<critical\s\+" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*critical" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
-    syn region fortranTeam transparent fold keepend start="^\s*\<change\s\+team\>" skip="^\([!c*]\|\s*#\).*$" excludenl end="\<end\s*team\>" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
-    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
+    syn region fortranAssociate transparent fold keepend start="^\s*\<associate\s\+" skip="^\%([!c*]\|\s*#\).*$" excludenl end="\<end\s*associate" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
+    syn region fortranCritical transparent fold keepend start="^\s*\<critical\s\+" skip="^\%([!c*]\|\s*#\).*$" excludenl end="\<end\s*critical" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
+    syn region fortranTeam transparent fold keepend start="^\s*\<change\s\+team\>" skip="^\%([!c*]\|\s*#\).*$" excludenl end="\<end\s*team\>" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
+    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
+    syn region fortranMultiComments fold  start="^\zs[!c*].*\_s*[!c*]" skip="^[!c*]"   end='^\ze\s*[^!c*]'
   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
-    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
-    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
-    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
+    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
+    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
+    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
+    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
     syn region fortranBlockData transparent fold keepend start="\<block\>" skip="^\s*[!#].*$" excludenl end="\<end\s*block\>" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortran77Loop,fortranCase,fortran90Loop,fortranIfBlock
     syn region fortranAssociate transparent fold keepend start="\<associate\>" skip="^\s*[!#].*$" excludenl end="\<end\s*associate\>" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
     syn region fortranCritical transparent fold keepend start="\<critical\>" skip="^\s*[!#].*$" excludenl end="\<end\s*critical\>" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
     syn region fortranTeam transparent fold keepend start="\<change\s\+team\>" skip="^\s*[!#].*$" excludenl end="\<end\s*team\>" contains=ALLBUT,fortranProgram,fortranModule,fortranSubroutine,fortranFunction
-    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
+    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
+    syn region fortranMultiComments fold  start="^\zs\s*!.*\_s*!"      skip="^\s*!"    end='^\ze\s*[^!]'
   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,fortranAttribute,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,fortranAttribute,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,fortranAttribute,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
-      syn region fortranCase transparent fold keepend extend start="\<select\s*\(case\|type\|rank\)\>" skip="^\([!c*]\|\s*#\).*$" end="\<end\s*select\>" contains=ALLBUT,fortranUnitHeader,fortranAttribute,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,fortranAttribute,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,fortranAttribute,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
+      syn region fortranCase transparent fold keepend extend start="\<select\s*\%(case\|type\|rank\)\>" skip="^\%([!c*]\|\s*#\).*$" end="\<end\s*select\>" contains=ALLBUT,fortranUnitHeader,fortranAttribute,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
     else
       syn region fortran77Loop transparent fold keepend start="\<do\s\+\z(\d\+\)" end="^\s*\z1\>" contains=ALLBUT,fortranUnitHeader,fortranAttribute,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,fortranAttribute,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
-      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,fortranAttribute,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
-      syn region fortranCase transparent fold keepend extend start="\<select\s*\(case\|type\|rank\)\>" skip="^\s*[!#].*$" end="\<end\s*select\>" contains=ALLBUT,fortranUnitHeader,fortranAttribute,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,fortranAttribute,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
+      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,fortranAttribute,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
+      syn region fortranCase transparent fold keepend extend start="\<select\s*\%(case\|type\|rank\)\>" skip="^\s*[!#].*$" end="\<end\s*select\>" contains=ALLBUT,fortranUnitHeader,fortranAttribute,fortranStorageClass,fortranType,fortranProgram,fortranModule,fortranSubroutine,fortranFunction,fortranBlockData
     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.
-" 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
@@ -481,6 +469,7 @@ hi def link cPreCondit              PreCondit
 hi def link fortranOpenMP       PreProc
 hi def link fortranParenError  Error
 hi def link fortranComment     Comment
+hi def link fortranMultiComments  Comment
 hi def link fortranSerialNumber        Todo
 hi def link fortranTab         Error