/usr/share/nano/fortran.nanorc is in nano 2.7.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | ## Here is an example for Fortran 90/95.
syntax "fortran" "\.(f|f90|f95)$"
comment "!"
color red "\<[0-9]+\>"
icolor green "\<(action|advance|all|allocatable|allocated|any|apostrophe)\>"
icolor green "\<(append|asis|assign|assignment|associated|character|common)\>"
icolor green "\<(complex|data|default|delim|dimension|double precision)\>"
icolor green "\<(elemental|epsilon|external|file|fmt|form|format|huge)\>"
icolor green "\<(implicit|include|index|inquire|integer|intent|interface)\>"
icolor green "\<(intrinsic|iostat|kind|logical|module|none|null|only)>"
icolor green "\<(operator|optional|pack|parameter|pointer|position|private)\>"
icolor green "\<(program|public|real|recl|recursive|selected_int_kind)\>"
icolor green "\<(selected_real_kind|subroutine|status)\>"
icolor cyan "\<(abs|achar|adjustl|adjustr|allocate|bit_size|call|char)\>"
icolor cyan "\<(close|contains|count|cpu_time|cshift|date_and_time)\>"
icolor cyan "\<(deallocate|digits|dot_product|eor|eoshift|function|iachar)\>"
icolor cyan "\<(iand|ibclr|ibits|ibset|ichar|ieor|iolength|ior|ishft|ishftc)\>"
icolor cyan "\<(lbound|len|len_trim|matmul|maxexponent|maxloc|maxval|merge)\>"
icolor cyan "\<(minexponent|minloc|minval|mvbits|namelist|nearest|nullify)\>"
icolor cyan "\<(open|pad|present|print|product|pure|quote|radix)\>"
icolor cyan "\<(random_number|random_seed|range|read|readwrite|replace)\>"
icolor cyan "\<(reshape|rewind|save|scan|sequence|shape|sign|size|spacing)\>"
icolor cyan "\<(spread|sum|system_clock|target|transfer|transpose|trim)\>"
icolor cyan "\<(ubound|unpack|verify|write|tiny|type|use|yes)\>"
icolor yellow "\<(.and.|case|do|else|else?if|else?where|end|end?do|end?if)\>"
icolor yellow "\<(end?select|.eqv.|forall|if|lge|lgt|lle|llt|.neqv.|.not.)\>"
icolor yellow "\<(.or.|repeat|select case|then|where|while)\>"
icolor magenta "\<(continue|cycle|exit|go?to|result|return)\>"
# Strings.
icolor yellow "<[^= ]*>" ""(\\.|[^"])*""
# Comments.
icolor blue "!.*"
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