Struct core::ops::RangeFrom1.0.0 [] [src]

pub struct RangeFrom<Idx> {
    pub start: Idx,
}

A range only bounded inclusively below (start..).

The RangeFrom start.. contains all values with x >= start.

Note: Currently, no overflow checking is done for the Iterator implementation; if you use an integer range and the integer overflows, it might panic in debug mode or create an endless loop in release mode. This overflow behavior might change in the future.

Examples

assert_eq!((2..), std::ops::RangeFrom { start: 2 });
assert_eq!(2 + 3 + 4, (2..).take(3).sum());

let arr = [0, 1, 2, 3];
assert_eq!(arr[ .. ], [0,1,2,3]);
assert_eq!(arr[ ..3], [0,1,2  ]);
assert_eq!(arr[1.. ], [  1,2,3]);  // RangeFrom
assert_eq!(arr[1..3], [  1,2  ]);Run

Fields

The lower bound of the range (inclusive).

Methods

impl<Idx: PartialOrd<Idx>> RangeFrom<Idx>
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🔬 This is a nightly-only experimental API. (range_contains #32311)

recently added as per RFC

Returns true if item is contained in the range.

Examples

#![feature(range_contains)]

assert!(!(3..).contains(2));
assert!( (3..).contains(3));
assert!( (3..).contains(1_000_000_000));Run

Trait Implementations

impl<Idx: Clone> Clone for RangeFrom<Idx>
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Returns a copy of the value. Read more

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Performs copy-assignment from source. Read more

impl<Idx: PartialEq> PartialEq for RangeFrom<Idx>
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This method tests for self and other values to be equal, and is used by ==. Read more

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This method tests for !=.

impl<Idx: Eq> Eq for RangeFrom<Idx>
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impl<Idx: Hash> Hash for RangeFrom<Idx>
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Feeds this value into the given [Hasher]. Read more

1.3.0
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Feeds a slice of this type into the given [Hasher]. Read more

impl<Idx: Debug> Debug for RangeFrom<Idx>
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Formats the value using the given formatter.

impl<A: Step> Iterator for RangeFrom<A>
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The type of the elements being iterated over.

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Advances the iterator and returns the next value. Read more

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Returns the bounds on the remaining length of the iterator. Read more

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Returns the nth element of the iterator. Read more

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Consumes the iterator, counting the number of iterations and returning it. Read more

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Consumes the iterator, returning the last element. Read more

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🔬 This is a nightly-only experimental API. (iterator_step_by #27741)

unstable replacement of Range::step_by

Creates an iterator starting at the same point, but stepping by the given amount at each iteration. Read more

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Takes two iterators and creates a new iterator over both in sequence. Read more

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'Zips up' two iterators into a single iterator of pairs. Read more

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Takes a closure and creates an iterator which calls that closure on each element. Read more

1.21.0
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Calls a closure on each element of an iterator. Read more

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Creates an iterator which uses a closure to determine if an element should be yielded. Read more

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Creates an iterator that both filters and maps. Read more

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Creates an iterator which gives the current iteration count as well as the next value. Read more

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Creates an iterator which can use peek to look at the next element of the iterator without consuming it. Read more

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Creates an iterator that [skip]s elements based on a predicate. Read more

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Creates an iterator that yields elements based on a predicate. Read more

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Creates an iterator that skips the first n elements. Read more

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Creates an iterator that yields its first n elements. Read more

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An iterator adaptor similar to [fold] that holds internal state and produces a new iterator. Read more

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Creates an iterator that works like map, but flattens nested structure. Read more

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Creates an iterator which ends after the first [None]. Read more

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Do something with each element of an iterator, passing the value on. Read more

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Borrows an iterator, rather than consuming it. Read more

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Transforms an iterator into a collection. Read more

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Consumes an iterator, creating two collections from it. Read more

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An iterator method that applies a function, producing a single, final value. Read more

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Tests if every element of the iterator matches a predicate. Read more

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Tests if any element of the iterator matches a predicate. Read more

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Searches for an element of an iterator that satisfies a predicate. Read more

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Searches for an element in an iterator, returning its index. Read more

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Searches for an element in an iterator from the right, returning its index. Read more

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Returns the maximum element of an iterator. Read more

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Returns the minimum element of an iterator. Read more

1.6.0
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Returns the element that gives the maximum value from the specified function. Read more

1.15.0
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Returns the element that gives the maximum value with respect to the specified comparison function. Read more

1.6.0
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Returns the element that gives the minimum value from the specified function. Read more

1.15.0
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Returns the element that gives the minimum value with respect to the specified comparison function. Read more

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Reverses an iterator's direction. Read more

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Converts an iterator of pairs into a pair of containers. Read more

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Creates an iterator which [clone]s all of its elements. Read more

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Repeats an iterator endlessly. Read more

1.11.0
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Sums the elements of an iterator. Read more

1.11.0
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Iterates over the entire iterator, multiplying all the elements Read more

1.5.0
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Lexicographically compares the elements of this Iterator with those of another. Read more

1.5.0
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Lexicographically compares the elements of this Iterator with those of another. Read more

1.5.0
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Determines if the elements of this Iterator are equal to those of another. Read more

1.5.0
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Determines if the elements of this Iterator are unequal to those of another. Read more

1.5.0
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Determines if the elements of this Iterator are lexicographically less than those of another. Read more

1.5.0
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Determines if the elements of this Iterator are lexicographically less or equal to those of another. Read more

1.5.0
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Determines if the elements of this Iterator are lexicographically greater than those of another. Read more

1.5.0
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Determines if the elements of this Iterator are lexicographically greater than or equal to those of another. Read more

impl<A: Step> FusedIterator for RangeFrom<A>
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impl<T> SliceIndex<[T]> for RangeFrom<usize>
1.15.0
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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

The output type returned by methods.

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, if in bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, if in bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, without performing any bounds checking. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, without performing any bounds checking. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, panicking if out of bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, panicking if out of bounds. Read more

impl Index<RangeFrom<usize>> for str
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Implements substring slicing with syntax &self[begin ..].

Returns a slice of the string from byte offset begin to the end of the string.

Equivalent to &self[begin .. len].

The returned type after indexing.

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Performs the indexing (container[index]) operation.

impl IndexMut<RangeFrom<usize>> for str
1.3.0
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Implements mutable substring slicing with syntax &mut self[begin ..].

Returns a mutable slice of the string from byte offset begin to the end of the string.

Equivalent to &mut self[begin .. len].

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Performs the mutable indexing (container[index]) operation.

impl SliceIndex<str> for RangeFrom<usize>
1.20.0
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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

The output type returned by methods.

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, if in bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, if in bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, without performing any bounds checking. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, without performing any bounds checking. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, panicking if out of bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, panicking if out of bounds. Read more