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+" Vim syntax file
+" Language: grads (GrADS scripts)
+" Maintainer: Stefan Fronzek (sfronzek at gmx dot net)
+" Last change: 13 Feb 2004
+
+" Grid Analysis and Display System (GrADS); http://grads.iges.org/grads
+" This syntax file defines highlighting for only very few features of
+" the GrADS scripting language.
+
+" 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
+
+" GrADS is entirely case-insensitive.
+syn case ignore
+
+" The keywords
+
+syn keyword gradsStatement if else endif break exit return
+syn keyword gradsStatement while endwhile say prompt pull function
+syn keyword gradsStatement subwrd sublin substr read write close
+" String
+
+syn region gradsString start=+'+ end=+'+
+
+" Integer number
+syn match gradsNumber "[+-]\=\<[0-9]\+\>"
+
+" Operator
+
+"syn keyword gradsOperator | ! % & != >=
+"syn match gradsOperator "[^\.]not[^a-zA-Z]"
+
+" Variables
+
+syn keyword gradsFixVariables lat lon lev result rec rc
+syn match gradsglobalVariables "_[a-zA-Z][a-zA-Z0-9]*"
+syn match gradsVariables "[a-zA-Z][a-zA-Z0-9]*"
+syn match gradsConst "#[A-Z][A-Z_]+"
+
+" Comments
+
+syn match gradsComment "\*.*"
+
+" Typical Typos
+
+" for C programmers:
+" syn match gradsTypos "=="
+" syn match gradsTypos "!="
+
+" 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 hgs highlighting+yet
+if version >= 508 || !exists("did_gs_syn_inits")
+ if version < 508
+ let did_gs_syn_inits = 1
+ command -nargs=+ HiLink hi link <args>
+ else
+ command -nargs=+ HiLink hi def link <args>
+ endif
+
+ HiLink gradsStatement Statement
+
+ HiLink gradsString String
+ HiLink gradsNumber Number
+
+ HiLink gradsFixVariables Special
+ HiLink gradsVariables Identifier
+ HiLink gradsglobalVariables Special
+ HiLink gradsConst Special
+
+ HiLink gradsClassMethods Function
+
+ HiLink gradsOperator Operator
+ HiLink gradsComment Comment
+
+ HiLink gradsTypos Error
+
+ delcommand HiLink
+endif
+
+let b:current_syntax = "grads"