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constant |
::= |
integer-literal |
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float-literal |
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char-literal |
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string-literal |
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constr |
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false |
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true |
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[] |
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() |
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`tag-name |
The syntactic class of constants comprises literals from the four
base types (integers, floating-point numbers, characters, character
strings), and constant constructors from both normal and polymorphic
variants, as well as the special constants false, true, [],
and (), which behave like constant constructors.