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<p class='location'>Struct ConstantProjector</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new">new</a><a href="#method.project_without_rows">project_without_rows</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Projector">Projector</a></div></div><p class='location'><a href='index.html'>mentat_query_projector</a></p><script>window.sidebarCurrent = {name: 'ConstantProjector', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Struct <a href='index.html'>mentat_query_projector</a>::<wbr><a class="struct" href=''>ConstantProjector</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../src/mentat_query_projector/projectors/constant.rs.html#33-36' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct ConstantProjector { /* fields omitted */ }</pre><div class='docblock'><p>A projector that produces a <code>QueryResult</code> containing fixed data.
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Takes a boxed function that should return an empty result set of the desired type.</p>
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Methods<a href='#methods' class='anchor'></a>
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<h3 id='impl' class='impl'><span class='in-band'><code>impl <a class="struct" href="../mentat_query_projector/struct.ConstantProjector.html" title="struct mentat_query_projector::ConstantProjector">ConstantProjector</a></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_projector/projectors/constant.rs.html#38-54' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><code>pub fn <a href='#method.new' class='fnname'>new</a>(<br> spec: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html" title="struct alloc::rc::Rc">Rc</a><<a class="enum" href="../edn/query/enum.FindSpec.html" title="enum edn::query::FindSpec">FindSpec</a>>, <br> results_factory: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><<a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>() -> <a class="enum" href="../mentat_query_projector/enum.QueryResults.html" title="enum mentat_query_projector::QueryResults">QueryResults</a>><br>) -> <a class="struct" href="../mentat_query_projector/struct.ConstantProjector.html" title="struct mentat_query_projector::ConstantProjector">ConstantProjector</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_projector/projectors/constant.rs.html#39-44' title='goto source code'>[src]</a></span></h4>
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<h4 id='method.project_without_rows' class="method"><span id='project_without_rows.v' class='invisible'><code>pub fn <a href='#method.project_without_rows' class='fnname'>project_without_rows</a><'stmt>(&self) -> <a class="type" href="../query_projector_traits/errors/type.Result.html" title="type query_projector_traits::errors::Result">Result</a><<a class="struct" href="../mentat_query_projector/struct.QueryOutput.html" title="struct mentat_query_projector::QueryOutput">QueryOutput</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_projector/projectors/constant.rs.html#46-53' title='goto source code'>[src]</a></span></h4>
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Trait Implementations<a href='#implementations' class='anchor'></a>
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<h3 id='impl-Projector' class='impl'><span class='in-band'><code>impl <a class="trait" href="../mentat_query_projector/trait.Projector.html" title="trait mentat_query_projector::Projector">Projector</a> for <a class="struct" href="../mentat_query_projector/struct.ConstantProjector.html" title="struct mentat_query_projector::ConstantProjector">ConstantProjector</a></code><a href='#impl-Projector' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_projector/projectors/constant.rs.html#58-66' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.project' class="method"><span id='project.v' class='invisible'><code>fn <a href='../mentat_query_projector/trait.Projector.html#tymethod.project' class='fnname'>project</a><'stmt, 's>(<br> &self, <br> _schema: &<a class="struct" href="../mentat_core/struct.Schema.html" title="struct mentat_core::Schema">Schema</a>, <br> _sqlite: &'s <a class="struct" href="../rusqlite/struct.Connection.html" title="struct rusqlite::Connection">Connection</a>, <br> _rows: <a class="struct" href="../rusqlite/row/struct.Rows.html" title="struct rusqlite::row::Rows">Rows</a><'stmt><br>) -> <a class="type" href="../query_projector_traits/errors/type.Result.html" title="type query_projector_traits::errors::Result">Result</a><<a class="struct" href="../mentat_query_projector/struct.QueryOutput.html" title="struct mentat_query_projector::QueryOutput">QueryOutput</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_projector/projectors/constant.rs.html#59-61' title='goto source code'>[src]</a></span></h4>
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<h4 id='method.columns' class="method"><span id='columns.v' class='invisible'><code>fn <a href='../mentat_query_projector/trait.Projector.html#tymethod.columns' class='fnname'>columns</a><'s>(&'s self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><<a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a><Item = &<a class="enum" href="../edn/query/enum.Element.html" title="enum edn::query::Element">Element</a>> + 's></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_projector/projectors/constant.rs.html#63-65' title='goto source code'>[src]</a></span></h4>
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