Struct lexer

query/lex.go:64–72

lexer holds the state of the scanner.

// lexer holds the state of the scanner.
type lexer struct {
	name  string    // used only for error reports.
	input string    // the string being scanned.
	start int       // start position of this item.
	pos   int       // current position in the input.
	width int       // width of last rune read from input.
	items chan item // channel of scanned items.
	last  item
}

func lex(name, input string) (*lexer, chan item) {
	l := &lexer{