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rollup merge of #23947: aturon/revise-num
Recent numerics stabilization removed the inherent `min_value` and `max_value` methods from integer types, assuming that the module-level constants would suffice. However, that failed to account for the use case in FFI code when dealing with integer type aliases. This commit reintroduces the methods as `#[stable]`, since this is essential functionality for 1.0. It's unfortunate to freeze these as methods, but when we can provide inherent associated constants these methods can be deprecated. r? @sfackler cc @alexcrichton
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fb4029f8ea
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@ -819,6 +819,18 @@ macro_rules! int_impl {
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$add_with_overflow:path,
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$sub_with_overflow:path,
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$mul_with_overflow:path) => {
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/// Returns the smallest value that can be represented by this integer type.
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn min_value() -> $T {
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(-1 as $T) << ($BITS - 1)
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}
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/// Returns the largest value that can be represented by this integer type.
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn max_value() -> $T {
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let min: $T = Int::min_value(); !min
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}
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/// Convert a string slice in a given base to an integer.
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///
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/// Leading and trailing whitespace represent an error.
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@ -1329,6 +1341,14 @@ macro_rules! uint_impl {
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$add_with_overflow:path,
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$sub_with_overflow:path,
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$mul_with_overflow:path) => {
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/// Returns the smallest value that can be represented by this integer type.
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn min_value() -> $T { 0 }
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/// Returns the largest value that can be represented by this integer type.
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn max_value() -> $T { -1 }
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/// Convert a string slice in a given base to an integer.
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///
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/// Leading and trailing whitespace represent an error.
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