| 78 | } |
| 79 | |
| 80 | func (l *Lexer) scanNumber() bool { |
| 81 | digits := "0123456789_" |
| 82 | // Is it hex? |
| 83 | if l.accept("0") { |
| 84 | // Note: Leading 0 does not mean octal in floats. |
| 85 | if l.accept("xX") { |
| 86 | digits = "0123456789abcdefABCDEF_" |
| 87 | } else if l.accept("oO") { |
| 88 | digits = "01234567_" |
| 89 | } else if l.accept("bB") { |
| 90 | digits = "01_" |
| 91 | } |
| 92 | } |
| 93 | l.acceptRun(digits) |
| 94 | end := l.end |
| 95 | if l.accept(".") { |
| 96 | // Lookup for .. operator: if after dot there is another dot (1..2), it maybe a range operator. |
| 97 | if l.peek() == '.' { |
| 98 | // We can't backup() here, as it would require two backups, |
| 99 | // and backup() func supports only one for now. So, save and |
| 100 | // restore it here. |
| 101 | l.end = end |
| 102 | return true |
| 103 | } |
| 104 | l.acceptRun(digits) |
| 105 | } |
| 106 | if l.accept("eE") { |
| 107 | l.accept("+-") |
| 108 | l.acceptRun(digits) |
| 109 | } |
| 110 | // Next thing mustn't be alphanumeric. |
| 111 | if utils.IsAlphaNumeric(l.peek()) { |
| 112 | l.next() |
| 113 | return false |
| 114 | } |
| 115 | return true |
| 116 | } |
| 117 | |
| 118 | func dot(l *Lexer) stateFn { |
| 119 | l.next() |