## vhdl
syntax "vhdl" "\.vhdl?$"

## types
color type (i) "\b(string|integer|natural|positive|(un)?signed|std_u?logic(_vector)?|bit(_vector)?|boolean|u?x01z?|array|range)\b"

## identifiers (component-, library-names etc.)
color identifier (i) "library[ 	]+[a-zA-Z_0-9]+"
color identifier (i) "use[ 	]+[a-zA-Z_0-9\.]+"
color identifier (i) "component[ 	]+[a-zA-Z_0-9]+"
color identifier (i) "(architecture|configuration)[ 	]+[a-zA-Z_0-9]+[ 	]+of[ 	]+[a-zA-Z_0-9]+"
color identifier (i) "(entity|package)[ 	]+[a-zA-Z_0-9]+[ 	]+is"
color identifier (i) "end[ 	]+((architecture|entity|component|process|package|generate)[ 	]+)?[a-zA-Z_0-9]+"

## reserved words
color statement (i) "\b(abs|access|after|alias|all|and|architecture|assert|attribute)\b"
color statement (i) "\b(begin|block|body|buffer|bus|case|component|configuration|constant)\b"
color statement (i) "\b(disconnect|downto|else|elsif|end|entity|exit)\b"
color statement (i) "\b(file|for|function|generate|generic|guarded)\b"
color statement (i) "\b(if|impure|in|inertial|inout|is)\b"
color statement (i) "\b(label|library|linkage|literal|loop|map|mod)\b"
color statement (i) "\b(nand|new|next|nor|not|null|of|on|open|or|others|out)\b"
color statement (i) "\b(package|port|postponed|procedure|process|pure)\b"
color statement (i) "\b(range|record|register|reject|rem|report|return|rol|ror)\b"
color statement (i) "\b(select|severity|shared|signal|sla|sll|sra|srl|subtype)\b"
color statement (i) "\b(then|to|transport|type|unaffected|units|until|use)\b"
color statement (i) "\b(variable|wait|when|while|with|xnor|xor)\b"

## attributes
color statement (i) "'(base|left|right|high|low|pos|val|succ|pred|leftof|rightof|image|(last_)?value)"
color statement (i) "'((reverse_)?range|length|ascending|event|stable)"
color statement (i) "'(simple|path|instance)_name"

## library functions
color statement (i) "\b(std_match|(rising|falling)_edge|is_x)\b"
color statement (i) "\bto_(unsigned|signed|integer|u?x01z?|stdu?logic(vector)?)\b"

## operators
color statement "(\+|-|\*|/|&|<|>|=|\.|:)"

## constants
color constant.number (i) "'([0-1]|u|x|z|w|l|h|-)'" "[box]?"([0-1a-fA-F]|u|x|z|w|l|h|-)+""
color constant.number (i) "\b[0-9\._]+(e[-]?[0-9]+)?( ?[fpnum]?s)?\b"
color constant (i) "\b(true|false)\b"
## severity levels
color constant (i) "\b(note|warning|error|failure)\b"
color constant.string ""[^"]*""

## Comment highlighting
color comment "--.*"