highlight operators in size & constraint properties

Author: zaid

syntax/rec.vim

@@ -7,29 +7,35 @@ if exists("b:current_syntax")
     finish
 endif
 
-syntax keyword recKeyword %allowed %auto %confidential %constraint %doc %key
-syntax keyword recKeyword %mandatory %prohibit %rec %size %sort %unique
+syntax keyword recKeyword %allowed %auto %confidential %doc %key
+syntax keyword recKeyword %mandatory %prohibit %rec %sort %unique
 syntax keyword recKeyword %unique
 
 syntax match recComment "\v^#.*$"
 syntax match recField "\v^[a-zA-Z0-9_]*\:"
+syntax match recComparisonOperator "\v\>?\<?\!?\=?" contained
 
 syntax keyword recType int bool range real size line regexp date contained containedin=recTypeAssociation,recTypeDeclaration
 syntax keyword recType enum field email uuid rec contained containedin=recTypeAssociation,recTypeDeclaration
 syntax region recTypeComment start="\v\(" end="\v\)" contained containedin=recTypeAssociation,recTypeDeclaration
 syntax match recTypeAssociation "\v^[%]type\: .*"hs=s,he=s+5 contains=recType
 syntax match recTypeDeclaration "\v^[%]typedef\: .*"hs=s,he=s+8 contains=recType
 syntax keyword recTypeLimit MIN MAX contained containedin=recTypeAssociation,recTypeDeclaration
+syntax match recConstraintDeclaration "\v^[%]constraint\: .*"hs=s,he=s+11 contains=recComparisonOperator
+syntax match recSizeDeclaration "\v^[%]size\: .*"hs=s,he=s+5 contains=recComparisonOperator
 
 syntax match recNumber "\v\-?\d+"
 syntax match recNumber "\v\-?\d+\.\d+"
 syntax match recNumber "\v\-?0[0-7]+"
 syntax match recNumber "\v\-?0[xX][0-9a-fA-F]+"
 
 highlight default link recComment Comment
+highlight default link recComparisonOperator Operator
+highlight default link recConstraintDeclaration Keyword
 highlight default link recField Identifier
 highlight default link recKeyword Keyword
 highlight default link recNumber Number
+highlight default link recSizeDeclaration Keyword
 highlight default link recType Type
 highlight default link recTypeAssociation Keyword
 highlight default link recTypeComment Comment