| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="DBIterator is an iterator over the contents of a database."><meta name="keywords" content="rust, rustlang, rust-lang, DBIterator"><title>DBIterator in rusty_leveldb - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" 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class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../rusty_leveldb/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">DBIterator</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block"><li><a href="#method.new">new</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-LdbIterator-for-DBIterator">LdbIterator</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-DBIterator">!RefUnwindSafe</a></li><li><a href="#impl-Send-for-DBIterator">!Send</a></li><li><a href="#impl-Sync-for-DBIterator">!Sync</a></li><li><a href="#impl-Unpin-for-DBIterator">Unpin</a></li><li><a href="#impl-UnwindSafe-for-DBIterator">!UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-DBIterator">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-DBIterator">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-DBIterator">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-DBIterator">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-DBIterator">Into<U></a></li><li><a href="#impl-TryFrom%3CU%3E-for-DBIterator">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-DBIterator">TryInto<U></a></li><li><a href="#impl-VZip%3CV%3E-for-DBIterator">VZip<V></a></li></ul></section><h2><a href="index.html">In rusty_leveldb</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Struct <a href="index.html">rusty_leveldb</a>::<wbr><a class="struct" href="#">DBIterator</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../src/rusty_leveldb/db_iter.rs.html#17-35">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct DBIterator { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>DBIterator is an iterator over the contents of a database.</p> |
| </div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-DBIterator" class="impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#37-163">source</a><a href="#impl-DBIterator" class="anchor"></a><h3 class="code-header">impl <a class="struct" href="struct.DBIterator.html" title="struct rusty_leveldb::DBIterator">DBIterator</a></h3></section></summary><div class="impl-items"><section id="method.new" class="method has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#38-58">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fnname">new</a>(<br> cmp: Rc<Box<dyn <a class="trait" href="trait.Cmp.html" title="trait rusty_leveldb::Cmp">Cmp</a>>>,<br> vset: Rc<RefCell<VersionSet>>,<br> iter: MergingIter,<br> ss: Snapshot<br>) -> <a class="struct" href="struct.DBIterator.html" title="struct rusty_leveldb::DBIterator">DBIterator</a></h4></section></div></details></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-LdbIterator-for-DBIterator" class="impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#165-281">source</a><a href="#impl-LdbIterator-for-DBIterator" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="trait.LdbIterator.html" title="trait rusty_leveldb::LdbIterator">LdbIterator</a> for <a class="struct" href="struct.DBIterator.html" title="struct rusty_leveldb::DBIterator">DBIterator</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.advance" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#166-193">source</a><a href="#method.advance" class="anchor"></a><h4 class="code-header">fn <a href="trait.LdbIterator.html#tymethod.advance" class="fnname">advance</a>(&mut self) -> bool</h4></section></summary><div class='docblock'>Advances the position of the iterator by one element (which can be retrieved using |
| current(). If no more elements are available, advance() returns false, and the iterator |
| becomes invalid (i.e. as if reset() had been called). <a href="trait.LdbIterator.html#tymethod.advance">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.current" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#194-210">source</a><a href="#method.current" class="anchor"></a><h4 class="code-header">fn <a href="trait.LdbIterator.html#tymethod.current" class="fnname">current</a>(&self, key: &mut Vec<u8>, val: &mut Vec<u8>) -> bool</h4></section></summary><div class='docblock'>Return the current item (i.e. the item most recently returned by <code>next()</code>).</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.prev" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#211-241">source</a><a href="#method.prev" class="anchor"></a><h4 class="code-header">fn <a href="trait.LdbIterator.html#tymethod.prev" class="fnname">prev</a>(&mut self) -> bool</h4></section></summary><div class='docblock'>Go to the previous item; if the iterator is moved beyond the first element, <code>prev()</code> |
| returns false and it will be <code>!valid()</code>. This is inefficient for most iterator |
| implementations. <a href="trait.LdbIterator.html#tymethod.prev">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.valid" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#242-244">source</a><a href="#method.valid" class="anchor"></a><h4 class="code-header">fn <a href="trait.LdbIterator.html#tymethod.valid" class="fnname">valid</a>(&self) -> bool</h4></section></summary><div class='docblock'>Returns true if the iterator is not positioned before the first or after the last element, |
| i.e. if <code>current()</code> would succeed. <a href="trait.LdbIterator.html#tymethod.valid">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.seek" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#245-260">source</a><a href="#method.seek" class="anchor"></a><h4 class="code-header">fn <a href="trait.LdbIterator.html#tymethod.seek" class="fnname">seek</a>(&mut self, to: &[u8])</h4></section></summary><div class='docblock'>Seek the iterator to <code>key</code> or the next bigger key. If the seek is invalid (past last |
| element, or before first element), the iterator is <code>reset()</code> and not valid. <a href="trait.LdbIterator.html#tymethod.seek">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.seek_to_first" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#261-273">source</a><a href="#method.seek_to_first" class="anchor"></a><h4 class="code-header">fn <a href="trait.LdbIterator.html#method.seek_to_first" class="fnname">seek_to_first</a>(&mut self)</h4></section></summary><div class='docblock'>seek_to_first seeks to the first element.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.reset" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/db_iter.rs.html#274-280">source</a><a href="#method.reset" class="anchor"></a><h4 class="code-header">fn <a href="trait.LdbIterator.html#tymethod.reset" class="fnname">reset</a>(&mut self)</h4></section></summary><div class='docblock'>Resets the iterator to be <code>!valid()</code>, i.e. positioned before the first element.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.next" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/rusty_leveldb/types.rs.html#70-80">source</a><a href="#method.next" class="anchor"></a><h4 class="code-header">fn <a href="trait.LdbIterator.html#method.next" class="fnname">next</a>(&mut self) -> Option<(Vec<u8>, Vec<u8>)></h4></section></summary><div class='docblock'>next is like Iterator::next(). It’s implemented here because Rust disallows implementing a |
| foreign trait for any type, thus we can’t do <code>impl<T: LdbIterator> Iterator<Item=Vec<u8>> for T {}</code>. <a href="trait.LdbIterator.html#method.next">Read more</a></div></details></div></details></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-DBIterator" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-DBIterator" class="anchor"></a><h3 class="code-header">impl !RefUnwindSafe for <a class="struct" href="struct.DBIterator.html" title="struct rusty_leveldb::DBIterator">DBIterator</a></h3></section><section id="impl-Send-for-DBIterator" class="impl has-srclink"><a href="#impl-Send-for-DBIterator" class="anchor"></a><h3 class="code-header">impl !Send for <a class="struct" href="struct.DBIterator.html" title="struct rusty_leveldb::DBIterator">DBIterator</a></h3></section><section id="impl-Sync-for-DBIterator" class="impl has-srclink"><a href="#impl-Sync-for-DBIterator" class="anchor"></a><h3 class="code-header">impl !Sync for <a class="struct" href="struct.DBIterator.html" title="struct rusty_leveldb::DBIterator">DBIterator</a></h3></section><section id="impl-Unpin-for-DBIterator" class="impl has-srclink"><a href="#impl-Unpin-for-DBIterator" class="anchor"></a><h3 class="code-header">impl Unpin for <a class="struct" href="struct.DBIterator.html" title="struct rusty_leveldb::DBIterator">DBIterator</a></h3></section><section id="impl-UnwindSafe-for-DBIterator" class="impl has-srclink"><a href="#impl-UnwindSafe-for-DBIterator" class="anchor"></a><h3 class="code-header">impl !UnwindSafe for <a class="struct" href="struct.DBIterator.html" title="struct rusty_leveldb::DBIterator">DBIterator</a></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-DBIterator" class="impl has-srclink"><a href="#impl-Any-for-DBIterator" class="anchor"></a><h3 class="code-header">impl<T> Any for T<span class="where fmt-newline">where<br> T: 'static + ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a class="fnname">type_id</a>(&self) -> TypeId</h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-DBIterator" class="impl has-srclink"><a href="#impl-Borrow%3CT%3E-for-DBIterator" class="anchor"></a><h3 class="code-header">impl<T> Borrow<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow</a>(&self) -> &T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-DBIterator" class="impl has-srclink"><a href="#impl-BorrowMut%3CT%3E-for-DBIterator" class="anchor"></a><h3 class="code-header">impl<T> BorrowMut<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow_mut</a>(&mut self) -> &mut T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-DBIterator" class="impl has-srclink"><a href="#impl-From%3CT%3E-for-DBIterator" class="anchor"></a><h3 class="code-header">impl<T> From<T> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-DBIterator" class="impl has-srclink"><a href="#impl-Into%3CU%3E-for-DBIterator" class="anchor"></a><h3 class="code-header">impl<T, U> Into<U> for T<span class="where fmt-newline">where<br> U: From<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p> |
| <p>That is, this conversion is whatever the implementation of |
| <code>[From]<T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-DBIterator" class="impl has-srclink"><a href="#impl-TryFrom%3CU%3E-for-DBIterator" class="anchor"></a><h3 class="code-header">impl<T, U> TryFrom<U> for T<span class="where fmt-newline">where<br> U: Into<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = Infallible</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_from</a>(value: U) -> Result<T, <T as TryFrom<U>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-DBIterator" class="impl has-srclink"><a href="#impl-TryInto%3CU%3E-for-DBIterator" class="anchor"></a><h3 class="code-header">impl<T, U> TryInto<U> for T<span class="where fmt-newline">where<br> U: TryFrom<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = <U as TryFrom<T>>::Error</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_into</a>(self) -> Result<U, <U as TryFrom<T>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-VZip%3CV%3E-for-DBIterator" class="impl has-srclink"><a class="srclink rightside" href="../src/ppv_lite86/types.rs.html#221">source</a><a href="#impl-VZip%3CV%3E-for-DBIterator" class="anchor"></a><h3 class="code-header">impl<V, T> <a class="trait" href="../ppv_lite86/types/trait.VZip.html" title="trait ppv_lite86::types::VZip">VZip</a><V> for T<span class="where fmt-newline">where<br> V: <a class="trait" href="../ppv_lite86/types/trait.MultiLane.html" title="trait ppv_lite86::types::MultiLane">MultiLane</a><T>,</span></h3></section></summary><div class="impl-items"><section id="method.vzip" class="method trait-impl has-srclink"><a class="srclink rightside" href="../src/ppv_lite86/types.rs.html#226">source</a><a href="#method.vzip" class="anchor"></a><h4 class="code-header">fn <a href="../ppv_lite86/types/trait.VZip.html#tymethod.vzip" class="fnname">vzip</a>(self) -> V</h4></section></div></details></div></section></div></main><div id="rustdoc-vars" data-root-path="../" data-current-crate="rusty_leveldb" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
