# JOE syntax highlight file for Rust

=Idle
=Ident
=Comment
=Constant
=Number		+Constant
=Boolean	+Constant
=String		+Constant
=StringEscape	+Escape
=Character	+Constant
=CharacterEscape +Escape

=Keyword
=Operator	+Keyword
=Statement	+Keyword
=Conditional	+Statement
=Loop		+Statement
=StorageClass	+Type +Keyword
=Structure	+Statement

=Bad
=Brace

:pre_idle Idle
	*		NULL		noeat call=.rust()

.subr rust

# #! allowed on first line

:idle Idle
	*		idle
	"{}"		brace		recolor=-1
	"0"		zero		recolor=-1
	"1-9"		decimal		recolor=-1
	"."		decimal_point	recolor=-1
	"\""		string		recolor=-1
	"'"		char		recolor=-1
	"/"		slash		recolor=-1
	"\i"		ident		buffer

:slash Idle
	*		idle		noeat
	"*"		comment		recolor=-2
	"/"		line_comment	recolor=-2

:brace Brace
	*		idle		noeat

:comment Comment comment
	*		comment
	"BFHNTX"	comment		noeat call=comment_todo.comment_todo()
	"*"		maybe_end_comment

:maybe_end_comment Comment comment
	*		comment		noeat
	"/"		idle

:line_comment Comment comment
	*		line_comment
	"BFHNTX"	line_comment	noeat call=comment_todo.comment_todo()
	"\n"		idle

# Numbers

:bad_number Bad
	*		idle	noeat
	"0-9"		bad_number

:zero Number
	*		idle	noeat
	"b"		binary
	"o"		octal
	"x"		hex
	"."		float
	"eE"		epart
	"0-9"		decimal	recolor=-1
	"ui"		int_suffix
	"f"		float_suffix

:decimal_point Number
	*		idle	noeat	recolor=-2
	"0-9"		float

:octal Number
	*		idle	noeat
	"0-7_"		octal
	"89"		bad_number	recolor=-1
	"ui"		int_suffix

:binary Number
	*		idle	noeat
	"01_"		binary
	"2-9"		bad_number	recolor=-1
	"ui"		int_suffix

:hex Number
	*		idle	noeat
	"0-9A-Fa-f_"	hex
	"ui"		int_suffix

:decimal Number
	*		idle	noeat
	"0-9_"		decimal
	"eE"		epart
	"."		float
	"ui"		int_suffix
	"f"		float_suffix

:float Number
	*		idle	noeat
	"eE"		epart
	"0-9_"		float
	"ui"		int_suffix
	"f"		float_suffix

:epart Number
	*		idle	noeat
	"0-9+\-"	enum

:enum Number
	*		idle	noeat
	"0-9_"		enum
	"ui"		int_suffix
	"f"		float_suffix

:float_suffix Number
	*		bad_number	noeat	recolor=-1
	"3"		float_suffix_1
	"6"		float_suffix_2

:float_suffix_1 Number
	*		bad_number	noeat	recolor=-1
	"2"		idle

:float_suffix_2 Number
	*		bad_number	noeat	recolor=-1
	"4"		idle

:int_suffix Number
	*		bad_number	noeat	recolor=-1
	"3"		int_suffix_1
	"6"		int_suffix_2
	"s"		int_suffix_3

:int_suffix_1 Number
	*		bad_number	noeat	recolor=-1
	"2"		idle

:int_suffix_2 Number
	*		bad_number	noeat	recolor=-1
	"4"		idle

:int_suffix_3 Number
	*		bad_number	noeat	recolor=-2
	"i"		int_suffix_4

:int_suffix_4 Number
	*		bad_number	noeat	recolor=-3
	"z"		int_suffix_5

:int_suffix_5 Number
	*		bad_number	noeat	recolor=-4
	"e"		idle

# strings like "hello"

:string	String string
	*		string
	"\""		idle
	"\\"		string_escape	recolor=-1

:string_escape StringEscape string
	*		string
	"x"		string_hex2
	"u"		string_maybe_uni

:string_maybe_uni StringEscape string
	*		string		noeat
	"{"		string_uni

:string_uni StringEscape string
	*		string_uni
	"}"		string

:string_hex2 StringEscape string
	*		string		noeat
	"0-9a-fA-F"	string_hex1

:string_hex1 StringEscape string
	*		string		noeat
	"0-9a-fA-F"	string

# character constants like 'h'

:char	Character string
	*		char_done
	"\\"		char_escape	recolor=-1

:char_done Character string
	*		idle		noeat recolor=-3
	"\'"		idle

:char_escape CharacterEscape string
	*		char_done	noeat
	"x"		char_hex2
	"u"		char_maybe_uni

:char_maybe_uni CharacterEscape string
	*		char_done	noeat
	"{"		char_uni

:char_uni CharacterEscape string
	*		char_uni
	"}"		char_done

:char_hex2 CharacterEscape string
	*		char_done	noeat
	"0-9a-fA-F"	char_hex1

:char_hex1 CharacterEscape string
	*		char_done	noeat
	"0-9a-fA-F"	char

# Raw strings like r"hello" or r##"hello, "world""##
# The number of #'s is technically unbounded, but we'll limit to 4.

:raw_string_pre Ident
	*		ident		noeat
	"\""		raw_string_0	recolor=-2
	"#"		raw_string_pre_1 recolor=-2

:raw_string_pre_1 String string
	*		raw_string_bad	recolor=-3
	"\""		raw_string_1
	"#"		raw_string_pre_2

:raw_string_pre_2 String string
	*		raw_string_bad	recolor=-4
	"\""		raw_string_2
	"#"		raw_string_pre_3

:raw_string_pre_3 String string
	*		raw_string_bad	recolor=-5
	"\""		raw_string_3
	"#"		raw_string_pre_4

:raw_string_pre_4 String string
	*		raw_string_bad	recolor=-6
	"#\""		raw_string_4	# More than 4? too bad.

:raw_string_0 String string
	*		raw_string_0
	"\""		idle

:raw_string_1 String string
	*		raw_string_1
	"\""		raw_string_end_1

:raw_string_2 String string
	*		raw_string_2
	"\""		raw_string_end_2 buffer

:raw_string_3 String string
	*		raw_string_3
	"\""		raw_string_end_3 buffer

:raw_string_4 String string
	*		raw_string_4
	"\""		raw_string_end_4 buffer

:raw_string_end_1 String string
	*		raw_string_1	noeat
	"#"		idle

:raw_string_end_2 String string
	*		raw_string_2	noeat strings
	"\"##"		raw_string_end
done
	"#"		raw_string_end_2

:raw_string_end_3 String string
	*		raw_string_3	noeat strings
	"\"###"		raw_string_end
done
	"#"		raw_string_end_3

:raw_string_end_4 String string
	*		raw_string_4	noeat strings
	"\"####"	raw_string_end
done
	"#"		raw_string_end_4

:raw_string_end String string
	*		idle		noeat

:raw_string_bad Bad
	*		idle		noeat

# Byte string literals b"foo bar"

:byte_string_pre Ident
	*		ident		noeat recolor=-1
	"\""		string		recolor=-2

# Raw byte string literals br"hello world" and br###"Hello, "world""###

:raw_byte_string_pre Ident
	*		ident		noeat
	"\""		raw_string_0	recolor=-3
	"#"		raw_string_pre_1 recolor=-3

# Identifiers

:ident Ident
	*		idle	noeat strings
	"abstract"	storage
	"alignof"	kw
	"as"		operator
	"become"	kw
	"box"		kw
	"break"		loop
	"const"		storage
	"continue"	loop
	"crate"		kw
	"do"		loop
	"else"		cond
	"enum"		struct
	"extern"	storage
	"false"		bool
	"final"		storage
	"fn"		struct
	"for"		loop
	"if"		cond
	"impl"		kw
	"in"		operator
	"let"		kw
	"loop"		loop
	"macro"		kw
	"match"		kw
	"mod"		kw # operator?
	"move"		kw
	"mut"		kw
	"offsetof"	kw
	"override"	storage
	"priv"		storage
	"proc"		kw
	"pub"		storage
	"pure"		storage
	"ref"		kw
	"return"	stmt
	"Self"		kw
	"self"		kw
	"sizeof"	kw # operator?
	"static"	storage
	"struct"	struct
	"super"		kw
	"trait"		kw
	"true"		bool
	"type"		kw
	"typeof"	kw # operator?
	"unsafe"	storage
	"unsized"	kw # storage?
	"use"		kw
	"virtual"	storage
	"where"		kw
	"while"		loop
	"yield"		stmt
	
	# String/byte prefixes
	"r"		raw_string_pre
	"b"		byte_string_pre
	"br"		raw_byte_string_pre
done
	"\c"	ident

:kw Keyword
	*		idle		noeat

:lit Constant
	*		idle		noeat

:bool Boolean
	*		idle		noeat

:operator Operator
	*		idle		noeat

:storage StorageClass
	*		idle		noeat

:cond Conditional
	*		idle		noeat

:loop Loop
	*		idle		noeat

:struct Structure
	*		idle		noeat

.end