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Merge pull request #11188 from lf-/jade/kill-int-overflow

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Ban integer overflow in the Nix language
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Robert Hensing 2024-08-11 04:24:16 +02:00 • committed by GitHub
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7
doc/manual/src/language/syntax.md
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@ -15,6 +15,13 @@ See [String literals](string-literals.md).
Numbers, which can be *integers* (like `123`) or *floating point*
(like `123.43` or `.27e13`).
Integers in the Nix language are 64-bit [two's complement] signed integers, with a range of -9223372036854775808 to 9223372036854775807, inclusive.
[two's complement]: https://en.wikipedia.org/wiki/Two%27s_complement
Note that negative numeric literals are actually parsed as unary negation of positive numeric literals.
This means that the minimum integer `-9223372036854775808` cannot be written as-is as a literal, since the positive number `9223372036854775808` is one past the maximum range.
See [arithmetic] and [comparison] operators for semantics.
[arithmetic]: ./operators.md#arithmetic