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token.go
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/
token.go
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package wavefront
type Token int
const (
// Special tokens
ILLEGAL Token = iota
EOF
WS
// Literals
literal_beg
LETTER // metric name, source/point tags
NUMBER
MINUS_SIGN
UNDERSCORE
DOT
SLASH
BACKSLASH
COMMA
DELTA
literal_end
// Misc characters
QUOTES
EQUALS
NEWLINE
)
func isWhitespace(ch rune) bool {
return ch == ' ' || ch == '\t' || ch == '\n'
}
func isLetter(ch rune) bool {
return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')
}
func isNumber(ch rune) bool {
return ch >= '0' && ch <= '9'
}
func isDelta(ch rune) bool {
return ch == '\u2206' || ch == '\u0394'
}
var eof = rune(0)