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386 lines
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</pre><pre class="rust ">
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<span class="comment">// Copyright 2013-2017, The Gtk-rs Project Developers.</span>
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<span class="comment">// See the COPYRIGHT file at the top-level directory of this distribution.</span>
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<span class="comment">// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT></span>
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<span class="comment">// TODO: support marshaller.</span>
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>;
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ptr</span>;
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">slice</span>;
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<span class="kw">use</span> <span class="ident">libc</span>::{<span class="ident">c_uint</span>, <span class="ident">c_void</span>};
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<span class="kw">use</span> <span class="ident">ffi</span> <span class="kw">as</span> <span class="ident">glib_ffi</span>;
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<span class="kw">use</span> <span class="ident">gobject_ffi</span>;
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<span class="kw">use</span> <span class="ident">translate</span>::{<span class="ident">ToGlibPtr</span>, <span class="ident">ToGlibPtrMut</span>, <span class="ident">FromGlibPtrFull</span>, <span class="ident">Uninitialized</span>, <span class="ident">Stash</span>, <span class="ident">from_glib_none</span>};
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<span class="kw">use</span> <span class="ident">types</span>::<span class="ident">Type</span>;
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<span class="kw">use</span> <span class="ident">Value</span>;
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<span class="kw">use</span> <span class="ident">ToValue</span>;
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<span class="macro">glib_wrapper</span><span class="macro">!</span> {
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Closure</span>(<span class="ident">Shared</span><span class="op"><</span><span class="ident">gobject_ffi</span>::<span class="ident">GClosure</span><span class="op">></span>);
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<span class="kw">match</span> <span class="kw">fn</span> {
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<span class="kw-2">ref</span> <span class="op">=></span> <span class="op">|</span><span class="ident">ptr</span><span class="op">|</span> {
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<span class="ident">gobject_ffi</span>::<span class="ident">g_closure_ref</span>(<span class="ident">ptr</span>);
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<span class="ident">gobject_ffi</span>::<span class="ident">g_closure_sink</span>(<span class="ident">ptr</span>);
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},
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<span class="ident">unref</span> <span class="op">=></span> <span class="op">|</span><span class="ident">ptr</span><span class="op">|</span> <span class="ident">gobject_ffi</span>::<span class="ident">g_closure_unref</span>(<span class="ident">ptr</span>),
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<span class="ident">get_type</span> <span class="op">=></span> <span class="op">||</span> <span class="ident">gobject_ffi</span>::<span class="ident">g_closure_get_type</span>(),
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}
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}
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<span class="kw">impl</span> <span class="ident">Closure</span> {
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<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span><span class="op"><</span><span class="ident">F</span>: <span class="ident">Fn</span>(<span class="kw-2">&</span>[<span class="ident">Value</span>]) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Value</span><span class="op">></span> <span class="op">+</span> <span class="ident">Send</span> <span class="op">+</span> <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'static</span><span class="op">></span>(<span class="ident">callback</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="self">Self</span> {
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<span class="kw">unsafe</span> <span class="kw">extern</span> <span class="string">"C"</span> <span class="kw">fn</span> <span class="ident">marshal</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="ident">_closure</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">gobject_ffi</span>::<span class="ident">GClosure</span>, <span class="ident">return_value</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">gobject_ffi</span>::<span class="ident">GValue</span>,
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<span class="ident">n_param_values</span>: <span class="ident">c_uint</span>, <span class="ident">param_values</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">gobject_ffi</span>::<span class="ident">GValue</span>, <span class="ident">_invocation_hint</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">c_void</span>,
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<span class="ident">marshal_data</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">c_void</span>)
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||
<span class="kw">where</span> <span class="ident">F</span>: <span class="ident">Fn</span>(<span class="kw-2">&</span>[<span class="ident">Value</span>]) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Value</span><span class="op">></span> <span class="op">+</span> <span class="ident">Send</span> <span class="op">+</span> <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'static</span>
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{
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<span class="kw">let</span> <span class="ident">values</span> <span class="op">=</span> <span class="ident">slice</span>::<span class="ident">from_raw_parts</span>(<span class="ident">param_values</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _, <span class="ident">n_param_values</span> <span class="kw">as</span> <span class="ident">usize</span>);
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<span class="kw">let</span> <span class="ident">callback</span>: <span class="ident">Box</span><span class="op"><</span><span class="ident">F</span><span class="op">></span> <span class="op">=</span> <span class="ident">Box</span>::<span class="ident">from_raw</span>(<span class="ident">marshal_data</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _);
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<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">callback</span>(<span class="ident">values</span>);
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<span class="kw">if</span> <span class="op">!</span><span class="ident">return_value</span>.<span class="ident">is_null</span>() {
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<span class="kw">match</span> <span class="ident">result</span> {
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||
<span class="prelude-val">Some</span>(<span class="ident">result</span>) <span class="op">=></span> <span class="kw-2">*</span><span class="ident">return_value</span> <span class="op">=</span> <span class="ident">result</span>.<span class="ident">into_raw</span>(),
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<span class="prelude-val">None</span> <span class="op">=></span> {
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<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">Value</span>::<span class="ident">uninitialized</span>();
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<span class="kw-2">*</span><span class="ident">return_value</span> <span class="op">=</span> <span class="ident">result</span>.<span class="ident">into_raw</span>();
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},
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}
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}
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<span class="ident">mem</span>::<span class="ident">forget</span>(<span class="ident">callback</span>);
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}
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<span class="kw">unsafe</span> <span class="kw">extern</span> <span class="string">"C"</span> <span class="kw">fn</span> <span class="ident">finalize</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="ident">notify_data</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">c_void</span>, <span class="ident">_closure</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">gobject_ffi</span>::<span class="ident">GClosure</span>)
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<span class="kw">where</span> <span class="ident">F</span>: <span class="ident">Fn</span>(<span class="kw-2">&</span>[<span class="ident">Value</span>]) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Value</span><span class="op">></span> <span class="op">+</span> <span class="ident">Send</span> <span class="op">+</span> <span class="ident">Sync</span> <span class="op">+</span> <span class="lifetime">'static</span>
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{
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<span class="kw">let</span> <span class="ident">_callback</span>: <span class="ident">Box</span><span class="op"><</span><span class="ident">F</span><span class="op">></span> <span class="op">=</span> <span class="ident">Box</span>::<span class="ident">from_raw</span>(<span class="ident">notify_data</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _);
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<span class="comment">// callback is dropped here.</span>
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}
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||
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<span class="kw">unsafe</span> {
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<span class="kw">let</span> <span class="ident">size</span> <span class="op">=</span> <span class="number">4</span> <span class="op">+</span> <span class="number">4</span> <span class="op">+</span> <span class="number">3</span> <span class="op">*</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">c_void</span><span class="op">></span>() <span class="kw">as</span> <span class="ident">u32</span>;
|
||
<span class="kw">let</span> <span class="ident">closure</span> <span class="op">=</span> <span class="ident">gobject_ffi</span>::<span class="ident">g_closure_new_simple</span>(<span class="ident">size</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>());
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||
<span class="macro">assert_ne</span><span class="macro">!</span>(<span class="ident">closure</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>());
|
||
<span class="kw">let</span> <span class="ident">callback</span> <span class="op">=</span> <span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">callback</span>);
|
||
<span class="kw">let</span> <span class="ident">ptr</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">F</span> <span class="op">=</span> <span class="ident">Box</span>::<span class="ident">into_raw</span>(<span class="ident">callback</span>);
|
||
<span class="kw">let</span> <span class="ident">ptr</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">c_void</span> <span class="op">=</span> <span class="ident">ptr</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _;
|
||
<span class="ident">gobject_ffi</span>::<span class="ident">g_closure_set_meta_marshal</span>(<span class="ident">closure</span>, <span class="ident">ptr</span>, <span class="prelude-val">Some</span>(<span class="ident">marshal</span>::<span class="op"><</span><span class="ident">F</span><span class="op">></span>));
|
||
<span class="ident">gobject_ffi</span>::<span class="ident">g_closure_add_finalize_notifier</span>(<span class="ident">closure</span>, <span class="ident">ptr</span>, <span class="prelude-val">Some</span>(<span class="ident">finalize</span>::<span class="op"><</span><span class="ident">F</span><span class="op">></span>));
|
||
<span class="ident">from_glib_none</span>(<span class="ident">closure</span>)
|
||
}
|
||
}
|
||
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">invoke</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">values</span>: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">ToValue</span>]) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Value</span><span class="op">></span> {
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">Value</span>::<span class="ident">uninitialized</span>() };
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">values</span>: <span class="ident">Vec</span><span class="op"><</span>_<span class="op">></span> <span class="op">=</span> <span class="ident">values</span>.<span class="ident">iter</span>()
|
||
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="ident">v</span>.<span class="ident">to_value</span>())
|
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.<span class="ident">collect</span>();
|
||
<span class="kw">let</span> <span class="ident">gvalues</span> <span class="op">=</span> <span class="ident">values</span>.<span class="ident">as_mut_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _;
|
||
<span class="kw">unsafe</span> {
|
||
<span class="ident">gobject_ffi</span>::<span class="ident">g_closure_invoke</span>(<span class="self">self</span>.<span class="ident">to_glib_none</span>().<span class="number">0</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _, <span class="ident">result</span>.<span class="ident">to_glib_none_mut</span>().<span class="number">0</span>,
|
||
<span class="ident">values</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">u32</span>, <span class="ident">gvalues</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>());
|
||
}
|
||
<span class="kw">if</span> <span class="ident">result</span>.<span class="ident">type_</span>() <span class="op">==</span> <span class="ident">Type</span>::<span class="ident">Invalid</span> {
|
||
<span class="prelude-val">None</span>
|
||
} <span class="kw">else</span> {
|
||
<span class="prelude-val">Some</span>(<span class="ident">result</span>)
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
|
||
<span class="kw">mod</span> <span class="ident">tests</span> {
|
||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">Arc</span>;
|
||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::{<span class="ident">AtomicUsize</span>, <span class="ident">Ordering</span>};
|
||
|
||
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">Closure</span>;
|
||
<span class="kw">use</span> <span class="ident">ToValue</span>;
|
||
<span class="kw">use</span> <span class="ident">Value</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">closure_fn</span>(<span class="ident">values</span>: <span class="kw-2">&</span>[<span class="ident">Value</span>]) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Value</span><span class="op">></span> {
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">values</span>.<span class="ident">len</span>(), <span class="number">2</span>);
|
||
<span class="kw">let</span> <span class="ident">string</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> <span class="op">=</span> <span class="ident">values</span>[<span class="number">0</span>].<span class="ident">get</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">string</span>, <span class="prelude-val">Some</span>(<span class="string">"test"</span>.<span class="ident">to_string</span>()));
|
||
<span class="kw">let</span> <span class="ident">int</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="ident">values</span>[<span class="number">1</span>].<span class="ident">get</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">int</span>, <span class="prelude-val">Some</span>(<span class="number">42</span>));
|
||
<span class="prelude-val">Some</span>(<span class="number">24</span>.<span class="ident">to_value</span>())
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">test_closure</span>() {
|
||
<span class="kw">let</span> <span class="ident">call_count</span> <span class="op">=</span> <span class="ident">Arc</span>::<span class="ident">new</span>(<span class="ident">AtomicUsize</span>::<span class="ident">new</span>(<span class="number">0</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">count</span> <span class="op">=</span> <span class="ident">call_count</span>.<span class="ident">clone</span>();
|
||
<span class="kw">let</span> <span class="ident">closure</span> <span class="op">=</span> <span class="ident">Closure</span>::<span class="ident">new</span>(<span class="kw">move</span> <span class="op">|</span><span class="ident">values</span><span class="op">|</span> {
|
||
<span class="ident">count</span>.<span class="ident">fetch_add</span>(<span class="number">1</span>, <span class="ident">Ordering</span>::<span class="ident">Relaxed</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">values</span>.<span class="ident">len</span>(), <span class="number">2</span>);
|
||
<span class="kw">let</span> <span class="ident">string</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> <span class="op">=</span> <span class="ident">values</span>[<span class="number">0</span>].<span class="ident">get</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">string</span>, <span class="prelude-val">Some</span>(<span class="string">"test"</span>.<span class="ident">to_string</span>()));
|
||
<span class="kw">let</span> <span class="ident">int</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="ident">values</span>[<span class="number">1</span>].<span class="ident">get</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">int</span>, <span class="prelude-val">Some</span>(<span class="number">42</span>));
|
||
<span class="prelude-val">None</span>
|
||
});
|
||
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">closure</span>.<span class="ident">invoke</span>(<span class="kw-2">&</span>[<span class="kw-2">&</span><span class="string">"test"</span>.<span class="ident">to_string</span>(), <span class="kw-2">&</span><span class="number">42</span>]);
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">result</span>.<span class="ident">is_none</span>());
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">call_count</span>.<span class="ident">load</span>(<span class="ident">Ordering</span>::<span class="ident">Relaxed</span>), <span class="number">1</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">closure</span>.<span class="ident">invoke</span>(<span class="kw-2">&</span>[<span class="kw-2">&</span><span class="string">"test"</span>.<span class="ident">to_string</span>(), <span class="kw-2">&</span><span class="number">42</span>]);
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">result</span>.<span class="ident">is_none</span>());
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">call_count</span>.<span class="ident">load</span>(<span class="ident">Ordering</span>::<span class="ident">Relaxed</span>), <span class="number">2</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">closure</span> <span class="op">=</span> <span class="ident">Closure</span>::<span class="ident">new</span>(<span class="ident">closure_fn</span>);
|
||
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">closure</span>.<span class="ident">invoke</span>(<span class="kw-2">&</span>[<span class="kw-2">&</span><span class="string">"test"</span>.<span class="ident">to_string</span>(), <span class="kw-2">&</span><span class="number">42</span>]);
|
||
<span class="kw">let</span> <span class="ident">int</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="ident">result</span>.<span class="ident">and_then</span>(<span class="op">|</span><span class="ident">result</span><span class="op">|</span> <span class="ident">result</span>.<span class="ident">get</span>());
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">int</span>, <span class="prelude-val">Some</span>(<span class="number">24</span>));
|
||
}
|
||
}
|
||
</pre>
|
||
</section>
|
||
<section id='search' class="content hidden"></section>
|
||
|
||
<section class="footer"></section>
|
||
|
||
<aside id="help" class="hidden">
|
||
<div>
|
||
<h1 class="hidden">Help</h1>
|
||
|
||
<div class="shortcuts">
|
||
<h2>Keyboard Shortcuts</h2>
|
||
|
||
<dl>
|
||
<dt>?</dt>
|
||
<dd>Show this help dialog</dd>
|
||
<dt>S</dt>
|
||
<dd>Focus the search field</dd>
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||
<dt>↑</dt>
|
||
<dd>Move up in search results</dd>
|
||
<dt>↓</dt>
|
||
<dd>Move down in search results</dd>
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||
<dt>↹</dt>
|
||
<dd>Switch tab</dd>
|
||
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|
||
<dd>Go to active search result</dd>
|
||
<dt style="width:31px;">+ / -</dt>
|
||
<dd>Collapse/expand all sections</dd>
|
||
</dl>
|
||
</div>
|
||
|
||
<div class="infos">
|
||
<h2>Search Tricks</h2>
|
||
|
||
<p>
|
||
Prefix searches with a type followed by a colon (e.g.
|
||
<code>fn:</code>) to restrict the search to a given type.
|
||
</p>
|
||
|
||
<p>
|
||
Accepted types are: <code>fn</code>, <code>mod</code>,
|
||
<code>struct</code>, <code>enum</code>,
|
||
<code>trait</code>, <code>type</code>, <code>macro</code>,
|
||
and <code>const</code>.
|
||
</p>
|
||
|
||
<p>
|
||
Search functions by type signature (e.g.
|
||
<code>vec -> usize</code> or <code>* -> vec</code>)
|
||
</p>
|
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</div>
|
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</div>
|
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</aside>
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