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Vastly simplify TryFrom docs.

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Simon Heath 2019-02-27 09:54:37 -05:00 committed by Simon Sapin
parent 60cf413a20
commit 5dce719520
1 changed files with 8 additions and 28 deletions
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36
src/libcore/num/mod.rs
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@ -4545,13 +4545,8 @@ macro_rules! try_from_unbounded {
type Error = TryFromIntError;
/// Try to create the target number type from a source
/// number type. If the source type has a larger range
/// than the target, or their ranges are disjoint (such
/// as converting a signed to unsigned number or vice
/// versa), this will return `None` if the source value
/// doesn't fit into the range of the destination value.
/// If the conversion can never fail, this is still
/// implemented for completeness's sake.
/// number type. This returns an error if the source value
/// is outside of the range of the target type.
#[inline]
fn try_from(value: $source) -> Result<Self, Self::Error> {
Ok(value as $target)
@ -4568,13 +4563,8 @@ macro_rules! try_from_lower_bounded {
type Error = TryFromIntError;
/// Try to create the target number type from a source
/// number type. If the source type has a larger range
/// than the target, or their ranges are disjoint (such
/// as converting a signed to unsigned number or vice
/// versa), this will return `None` if the source value
/// doesn't fit into the range of the destination value.
/// If the conversion can never fail, this is still
/// implemented for completeness's sake.
/// number type. This returns an error if the source value
/// is outside of the range of the target type.
#[inline]
fn try_from(u: $source) -> Result<$target, TryFromIntError> {
if u >= 0 {
@ -4595,13 +4585,8 @@ macro_rules! try_from_upper_bounded {
type Error = TryFromIntError;
/// Try to create the target number type from a source
/// number type. If the source type has a larger range
/// than the target, or their ranges are disjoint (such
/// as converting a signed to unsigned number or vice
/// versa), this will return `None` if the source value
/// doesn't fit into the range of the destination value.
/// If the conversion can never fail, this is still
/// implemented for completeness's sake.
/// number type. This returns an error if the source value
/// is outside of the range of the target type.
#[inline]
fn try_from(u: $source) -> Result<$target, TryFromIntError> {
if u > (<$target>::max_value() as $source) {
@ -4622,13 +4607,8 @@ macro_rules! try_from_both_bounded {
type Error = TryFromIntError;
/// Try to create the target number type from a source
/// number type. If the source type has a larger range
/// than the target, or their ranges are disjoint (such
/// as converting a signed to unsigned number or vice
/// versa), this will return `None` if the source value
/// doesn't fit into the range of the destination value.
/// If the conversion can never fail, this is still
/// implemented for completeness's sake.
/// number type. This returns an error if the source value
/// is outside of the range of the target type.
#[inline]
fn try_from(u: $source) -> Result<$target, TryFromIntError> {
let min = <$target>::min_value() as $source;