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| Allegro CL

| 2 Syntax 2.3 Interpretation of Tokens 2.3.1 Numbers as Tokens 2.3.1.1 Potential Numbers as Tokens ### 2.3.1.1.2 Examples of Potential Numbers As examples, the tokens in the next figure are potential numbers, but they are not actually numbers, and so are reserved tokens; a conforming implementation is permitted, but not required, to define their meaning.
Examples of reserved tokens
`1b5000` | `777777q` | `1.7J` | `-3/4+6.7J` | `12/25/83`
`27^19` | `3^4/5` | `6//7` | `3.1.2.6` | `^-43^`
`3.141_592_653_589_793_238_4` | `-3.7+2.6i-6.17j+19.6k`
The tokens in the next figure are not potential numbers; they are always treated as symbols:
Examples of symbols
`/` | `/5` | `+` | `1+` | `1-`
`foo+` | `ab.cd` | `-` | `^` | `^/-`
The tokens in the next figure are potential numbers if the current input base is `16`, but they are always treated as symbols if the current input base is `10`.
Examples of symbols or potential numbers
`bad-face` | `25-dec-83` | `a/b` | `fad_cafe` | `f^`

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