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Relax str::get_unchecked precondition to permit empty slicing #69385

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Feb 24, 2020
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Relax str::get_unchecked precondition to permit empty slicing #69385

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8 changes: 4 additions & 4 deletions src/libcore/str/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2486,7 +2486,7 @@ impl str {
/// Callers of this function are responsible that these preconditions are
/// satisfied:
///
/// * The starting index must come before the ending index;
/// * The starting index must not exceed the ending index;
/// * Indexes must be within bounds of the original slice;
/// * Indexes must lie on UTF-8 sequence boundaries.
///
Expand Down Expand Up @@ -2518,7 +2518,7 @@ impl str {
/// Callers of this function are responsible that these preconditions are
/// satisfied:
///
/// * The starting index must come before the ending index;
/// * The starting index must not exceed the ending index;
/// * Indexes must be within bounds of the original slice;
/// * Indexes must lie on UTF-8 sequence boundaries.
///
Expand Down Expand Up @@ -2563,7 +2563,7 @@ impl str {
/// Callers of this function are responsible that three preconditions are
/// satisfied:
///
/// * `begin` must come before `end`.
/// * `begin` must not exceed `end`.
/// * `begin` and `end` must be byte positions within the string slice.
/// * `begin` and `end` must lie on UTF-8 sequence boundaries.
///
Expand Down Expand Up @@ -2612,7 +2612,7 @@ impl str {
/// Callers of this function are responsible that three preconditions are
/// satisfied:
///
/// * `begin` must come before `end`.
/// * `begin` must not exceed `end`.
/// * `begin` and `end` must be byte positions within the string slice.
/// * `begin` and `end` must lie on UTF-8 sequence boundaries.
#[stable(feature = "str_slice_mut", since = "1.5.0")]
Expand Down