lang

const (
	Dot         = `.`
	Quote       = `'`
	Splice      = `,@`
	SyntaxQuote = "`"
	Unquote     = `,`
	Space       = ` `

	BlockCommentStart = `#|`
	BlockCommentEnd   = `|#`

	ListEnd     = `)`
	ListStart   = `(`
	ObjectEnd   = `}`
	ObjectStart = `{`
	VectorEnd   = `]`
	VectorStart = `[`
	BytesStart  = ReaderPrefix + `b` + VectorStart
	BytesEnd    = VectorEnd

	TrueLiteral  = ReaderPrefix + `t`
	FalseLiteral = ReaderPrefix + `f`

	KwdPrefix    = `:`
	Keyword      = KwdPrefix + notStruct + `+`
	ReaderPrefix = `#`
	Preprocessor = ReaderPrefix + notStruct + `*`
	Identifier   = notStructPfx + notStruct + `*`

	// DomainSeparator is the character used to separate a domain from the
	// local component of a qualified symbol
	DomainSeparator = `/`

	Local     = `(` + DomainSeparator + `|(` + localStart + localCont + `))`
	Qualified = `(` + localStart + localCont + DomainSeparator + Local + `)`

	Comment    = `;[^\n]*([\n]|$)`
	NewLine    = `(\r\n|[\n\r])`
	Whitespace = `[\t\f ]+`

	StringQuote = `"`
	String      = `(")(?P<s>(\\\\|\\"|\\[^\\"]|[^"\\])*)("?)`

	Float = `[+-]?((0|[1-9]\d*)\.\d+([eE][+-]?\d+)?|` +
		`(0|[1-9]\d*)(\.\d+)?[eE][+-]?\d+)` + numTail

	Integer = `[+-]?(0[bB]\d+|0[xX][\dA-Fa-f]+|0\d*|[1-9]\d*)` + numTail

	Ratio = `[+-]?(0|[1-9]\d*)/[1-9]\d*` + numTail
)