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<div class="title">sigc::signal2< T_return, T_arg1, T_arg2, T_accumulator > Class Template Reference<div class="ingroups"><a class="el" href="group__signal.html">Signals</a></div></div> </div>
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<p>Signal declaration.
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<p><code>#include <sigc++/signal.h></code></p>
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Inheritance diagram for sigc::signal2< T_return, T_arg1, T_arg2, T_accumulator >:</div>
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<div class="center"><img src="classsigc_1_1signal2__inherit__graph.png" border="0" usemap="#sigc_1_1signal2_3_01T__return_00_01T__arg1_00_01T__arg2_00_01T__accumulator_01_4_inherit__map" alt="Inheritance graph"/></div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:ad507bc5ea29adb2305f8fa91acbd30ee"><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="structsigc_1_1slot__list.html#a957838a7111e132824c10c2d5a897a0b">slot_list_type::const_iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#ad507bc5ea29adb2305f8fa91acbd30ee">const_iterator</a></td></tr>
<tr class="separator:ad507bc5ea29adb2305f8fa91acbd30ee"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aacb8fe57ffe01dea5c5fb5af44634287"><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="structsigc_1_1slot__list.html#a8293bfca54539958326f57375e4d8c14">slot_list_type::const_reverse_iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#aacb8fe57ffe01dea5c5fb5af44634287">const_reverse_iterator</a></td></tr>
<tr class="separator:aacb8fe57ffe01dea5c5fb5af44634287"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a01379d580d21de8bc8d0d2d62e6324ea"><td class="memItemLeft" align="right" valign="top">typedef internal::signal_emit2< T_return, T_arg1, T_arg2, T_accumulator > </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a01379d580d21de8bc8d0d2d62e6324ea">emitter_type</a></td></tr>
<tr class="separator:a01379d580d21de8bc8d0d2d62e6324ea"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a658ba1c6468882c9b1d480be2bbaf55e"><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="structsigc_1_1slot__list.html#a9774e07e467d9463e6e7cc7aa2f5c05f">slot_list_type::iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a658ba1c6468882c9b1d480be2bbaf55e">iterator</a></td></tr>
<tr class="separator:a658ba1c6468882c9b1d480be2bbaf55e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a55151695417c33540357ff524bfe2665"><td class="memItemLeft" align="right" valign="top">typedef emitter_type::result_type </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a55151695417c33540357ff524bfe2665">result_type</a></td></tr>
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<tr class="memitem:a6710759bdeb8e626fc09d8c448e6613f"><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="structsigc_1_1slot__list.html#addb44a7590825f917b3fcf0179fadadb">slot_list_type::reverse_iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a6710759bdeb8e626fc09d8c448e6613f">reverse_iterator</a></td></tr>
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<tr class="memitem:af31262f54dfb2a97540de9c4a1fc5726"><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="structsigc_1_1slot__list.html">slot_list</a>< <a class="el" href="classsigc_1_1signal2.html#af7797ae10e76307f8d230588e760f119">slot_type</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#af31262f54dfb2a97540de9c4a1fc5726">slot_list_type</a></td></tr>
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<tr class="memitem:af7797ae10e76307f8d230588e760f119"><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="classsigc_1_1slot.html">slot</a>< T_return(T_arg1, T_arg2)> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#af7797ae10e76307f8d230588e760f119">slot_type</a></td></tr>
<tr class="separator:af7797ae10e76307f8d230588e760f119"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_types_structsigc_1_1signal__base"><td colspan="2" onclick="javascript:toggleInherit('pub_types_structsigc_1_1signal__base')"><img src="closed.png" alt="-"/> Public Types inherited from <a class="el" href="structsigc_1_1signal__base.html">sigc::signal_base</a></td></tr>
<tr class="memitem:aa60e22abd088b6cde2dd50fb3f228aa4 inherit pub_types_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top">typedef std::size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#aa60e22abd088b6cde2dd50fb3f228aa4">size_type</a></td></tr>
<tr class="separator:aa60e22abd088b6cde2dd50fb3f228aa4 inherit pub_types_structsigc_1_1signal__base"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_types_structsigc_1_1trackable"><td colspan="2" onclick="javascript:toggleInherit('pub_types_structsigc_1_1trackable')"><img src="closed.png" alt="-"/> Public Types inherited from <a class="el" href="structsigc_1_1trackable.html">sigc::trackable</a></td></tr>
<tr class="memitem:a3338954d7565534bd945290b798e13ed inherit pub_types_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top">typedef internal::func_destroy_notify </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a3338954d7565534bd945290b798e13ed">func_destroy_notify</a></td></tr>
<tr class="separator:a3338954d7565534bd945290b798e13ed inherit pub_types_structsigc_1_1trackable"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a47aba9b19bc2bef0be7183022567e3ea"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a47aba9b19bc2bef0be7183022567e3ea">signal2</a> ()</td></tr>
<tr class="separator:a47aba9b19bc2bef0be7183022567e3ea"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa634515507f2ea4a35584e12e2dc92e7"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#aa634515507f2ea4a35584e12e2dc92e7">signal2</a> (const <a class="el" href="classsigc_1_1signal2.html">signal2</a>& src)</td></tr>
<tr class="separator:aa634515507f2ea4a35584e12e2dc92e7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a20c59f06175d4c48394c65035d2c3376"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a20c59f06175d4c48394c65035d2c3376">signal2</a> (<a class="el" href="classsigc_1_1signal2.html">signal2</a>&& src)</td></tr>
<tr class="separator:a20c59f06175d4c48394c65035d2c3376"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa686af4f961b098a23d4f7276437c2b0"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classsigc_1_1signal2.html#a658ba1c6468882c9b1d480be2bbaf55e">iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#aa686af4f961b098a23d4f7276437c2b0">connect</a> (const <a class="el" href="classsigc_1_1signal2.html#af7797ae10e76307f8d230588e760f119">slot_type</a>& slot_)</td></tr>
<tr class="memdesc:aa686af4f961b098a23d4f7276437c2b0"><td class="mdescLeft"> </td><td class="mdescRight">Add a slot to the list of slots. <a href="#aa686af4f961b098a23d4f7276437c2b0">More...</a><br /></td></tr>
<tr class="separator:aa686af4f961b098a23d4f7276437c2b0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab89b1876c69ea40954b0af37e75a21b4"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classsigc_1_1signal2.html#a658ba1c6468882c9b1d480be2bbaf55e">iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#ab89b1876c69ea40954b0af37e75a21b4">connect</a> (<a class="el" href="classsigc_1_1signal2.html#af7797ae10e76307f8d230588e760f119">slot_type</a>&& slot_)</td></tr>
<tr class="memdesc:ab89b1876c69ea40954b0af37e75a21b4"><td class="mdescLeft"> </td><td class="mdescRight">Add a slot to the list of slots. <a href="#ab89b1876c69ea40954b0af37e75a21b4">More...</a><br /></td></tr>
<tr class="separator:ab89b1876c69ea40954b0af37e75a21b4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad0bef6ff1542e3b8a6886d6a2245f080"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classsigc_1_1signal2.html#a55151695417c33540357ff524bfe2665">result_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080">emit</a> (<a class="el" href="namespacesigc.html#aa0d56c61023af35c47b79db80b32fd2e">type_trait_take_t</a>< T_arg1 > _A_a1, <a class="el" href="namespacesigc.html#aa0d56c61023af35c47b79db80b32fd2e">type_trait_take_t</a>< T_arg2 > _A_a2) const </td></tr>
<tr class="memdesc:ad0bef6ff1542e3b8a6886d6a2245f080"><td class="mdescLeft"> </td><td class="mdescRight">Triggers the emission of the signal. <a href="#ad0bef6ff1542e3b8a6886d6a2245f080">More...</a><br /></td></tr>
<tr class="separator:ad0bef6ff1542e3b8a6886d6a2245f080"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa7f667dfda17330e0e206923cfa7cc63"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classsigc_1_1signal2.html#a55151695417c33540357ff524bfe2665">result_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#aa7f667dfda17330e0e206923cfa7cc63">emit_reverse</a> (<a class="el" href="namespacesigc.html#aa0d56c61023af35c47b79db80b32fd2e">type_trait_take_t</a>< T_arg1 > _A_a1, <a class="el" href="namespacesigc.html#aa0d56c61023af35c47b79db80b32fd2e">type_trait_take_t</a>< T_arg2 > _A_a2) const </td></tr>
<tr class="memdesc:aa7f667dfda17330e0e206923cfa7cc63"><td class="mdescLeft"> </td><td class="mdescRight">Triggers the emission of the signal in reverse order (see <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a>). <a href="#aa7f667dfda17330e0e206923cfa7cc63">More...</a><br /></td></tr>
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<tr class="memitem:a6100abe9cd679c48fc3fb63ee9d289c5"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classsigc_1_1bound__const__mem__functor2.html">bound_const_mem_functor2</a>< <a class="el" href="classsigc_1_1signal2.html#a55151695417c33540357ff524bfe2665">result_type</a>, <a class="el" href="classsigc_1_1signal2.html">signal2</a>, <a class="el" href="namespacesigc.html#aa0d56c61023af35c47b79db80b32fd2e">type_trait_take_t</a>< T_arg1 >, <a class="el" href="namespacesigc.html#aa0d56c61023af35c47b79db80b32fd2e">type_trait_take_t</a>< T_arg2 > > </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a6100abe9cd679c48fc3fb63ee9d289c5">make_slot</a> () const </td></tr>
<tr class="memdesc:a6100abe9cd679c48fc3fb63ee9d289c5"><td class="mdescLeft"> </td><td class="mdescRight">Creates a functor that calls <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a> on this signal. <a href="#a6100abe9cd679c48fc3fb63ee9d289c5">More...</a><br /></td></tr>
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<tr class="memitem:a97ee99a844f493929b1a114d549f6507"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classsigc_1_1signal2.html#a55151695417c33540357ff524bfe2665">result_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a97ee99a844f493929b1a114d549f6507">operator()</a> (<a class="el" href="namespacesigc.html#aa0d56c61023af35c47b79db80b32fd2e">type_trait_take_t</a>< T_arg1 > _A_a1, <a class="el" href="namespacesigc.html#aa0d56c61023af35c47b79db80b32fd2e">type_trait_take_t</a>< T_arg2 > _A_a2) const </td></tr>
<tr class="memdesc:a97ee99a844f493929b1a114d549f6507"><td class="mdescLeft"> </td><td class="mdescRight">Triggers the emission of the signal (see <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a>). <a href="#a97ee99a844f493929b1a114d549f6507">More...</a><br /></td></tr>
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<tr class="memitem:abeb05d9a2b40882bad753fccad6522be"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classsigc_1_1signal2.html">signal2</a>& </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#abeb05d9a2b40882bad753fccad6522be">operator=</a> (const <a class="el" href="classsigc_1_1signal2.html">signal2</a>& src)</td></tr>
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<tr class="memitem:a5d3f71fb9ee8754c4640fb5bfb954151"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classsigc_1_1signal2.html">signal2</a>& </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a5d3f71fb9ee8754c4640fb5bfb954151">operator=</a> (<a class="el" href="classsigc_1_1signal2.html">signal2</a>&& src)</td></tr>
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<tr class="memitem:ac28b0205aa1e60cc5ce062d4d8545323"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classsigc_1_1signal2.html#af31262f54dfb2a97540de9c4a1fc5726">slot_list_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#ac28b0205aa1e60cc5ce062d4d8545323">slots</a> ()</td></tr>
<tr class="memdesc:ac28b0205aa1e60cc5ce062d4d8545323"><td class="mdescLeft"> </td><td class="mdescRight">Creates an STL-style interface for the signal's list of slots. <a href="#ac28b0205aa1e60cc5ce062d4d8545323">More...</a><br /></td></tr>
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<tr class="memitem:a258c0e2926cc21629989bee8a92ec86a"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classsigc_1_1signal2.html#af31262f54dfb2a97540de9c4a1fc5726">slot_list_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1signal2.html#a258c0e2926cc21629989bee8a92ec86a">slots</a> () const </td></tr>
<tr class="memdesc:a258c0e2926cc21629989bee8a92ec86a"><td class="mdescLeft"> </td><td class="mdescRight">Creates an STL-style interface for the signal's list of slots. <a href="#a258c0e2926cc21629989bee8a92ec86a">More...</a><br /></td></tr>
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<tr class="inherit_header pub_methods_structsigc_1_1signal__base"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_structsigc_1_1signal__base')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="structsigc_1_1signal__base.html">sigc::signal_base</a></td></tr>
<tr class="memitem:aff65198ddcb4fbccb644ff853e663e0e inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#aff65198ddcb4fbccb644ff853e663e0e">signal_base</a> () noexcept</td></tr>
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<tr class="memitem:a761e95b8c7b460664d3338ed3eb39543 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a761e95b8c7b460664d3338ed3eb39543">signal_base</a> (const <a class="el" href="structsigc_1_1signal__base.html">signal_base</a>& src) noexcept</td></tr>
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<tr class="memitem:a9f8570c89cd5c0b35613570a5ea80154 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a9f8570c89cd5c0b35613570a5ea80154">signal_base</a> (<a class="el" href="structsigc_1_1signal__base.html">signal_base</a>&& src)</td></tr>
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<tr class="memitem:afa2e5807537c989b430015e5ae05a357 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#afa2e5807537c989b430015e5ae05a357">~signal_base</a> ()</td></tr>
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<tr class="memitem:a52fda4806ec9dbc02baa95ce70c13fb0 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a52fda4806ec9dbc02baa95ce70c13fb0">block</a> (bool should_block=true) noexcept</td></tr>
<tr class="memdesc:a52fda4806ec9dbc02baa95ce70c13fb0 inherit pub_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Sets the blocking state of all slots in the list. <a href="#a52fda4806ec9dbc02baa95ce70c13fb0">More...</a><br /></td></tr>
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<tr class="memitem:a228da4dd1eac6905dafbc5697086e503 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a228da4dd1eac6905dafbc5697086e503">blocked</a> () const noexcept</td></tr>
<tr class="memdesc:a228da4dd1eac6905dafbc5697086e503 inherit pub_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Returns whether all slots in the list are blocked. <a href="#a228da4dd1eac6905dafbc5697086e503">More...</a><br /></td></tr>
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<tr class="memitem:a17597d66e680d222248c523985f0afd6 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a17597d66e680d222248c523985f0afd6">clear</a> ()</td></tr>
<tr class="memdesc:a17597d66e680d222248c523985f0afd6 inherit pub_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Empties the list of slots. <a href="#a17597d66e680d222248c523985f0afd6">More...</a><br /></td></tr>
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<tr class="memitem:a24e7fc4e07ac19cebafe8e3bd71bfe94 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a24e7fc4e07ac19cebafe8e3bd71bfe94">empty</a> () const noexcept</td></tr>
<tr class="memdesc:a24e7fc4e07ac19cebafe8e3bd71bfe94 inherit pub_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Returns whether the list of slots is empty. <a href="#a24e7fc4e07ac19cebafe8e3bd71bfe94">More...</a><br /></td></tr>
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<tr class="memitem:a90b36a7b33e107ce0af0de895e0df286 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1signal__base.html">signal_base</a>& </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a90b36a7b33e107ce0af0de895e0df286">operator=</a> (const <a class="el" href="structsigc_1_1signal__base.html">signal_base</a>& src)</td></tr>
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<tr class="memitem:a277a34edf44207fb4784807eac5872c6 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1signal__base.html">signal_base</a>& </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a277a34edf44207fb4784807eac5872c6">operator=</a> (<a class="el" href="structsigc_1_1signal__base.html">signal_base</a>&& src)</td></tr>
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<tr class="memitem:a0725416f747d6db3c57fa318a9f887a8 inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1signal__base.html#aa60e22abd088b6cde2dd50fb3f228aa4">size_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a0725416f747d6db3c57fa318a9f887a8">size</a> () const noexcept</td></tr>
<tr class="memdesc:a0725416f747d6db3c57fa318a9f887a8 inherit pub_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Returns the number of slots in the list. <a href="#a0725416f747d6db3c57fa318a9f887a8">More...</a><br /></td></tr>
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<tr class="memitem:aebb7ac69ea745cd60c0505f8d553d27f inherit pub_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#aebb7ac69ea745cd60c0505f8d553d27f">unblock</a> () noexcept</td></tr>
<tr class="memdesc:aebb7ac69ea745cd60c0505f8d553d27f inherit pub_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Unsets the blocking state of all slots in the list. <a href="#aebb7ac69ea745cd60c0505f8d553d27f">More...</a><br /></td></tr>
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<tr class="inherit_header pub_methods_structsigc_1_1trackable"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_structsigc_1_1trackable')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="structsigc_1_1trackable.html">sigc::trackable</a></td></tr>
<tr class="memitem:a7e1348841e762fb41b41c6f2ce9fa073 inherit pub_methods_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a7e1348841e762fb41b41c6f2ce9fa073">trackable</a> () noexcept</td></tr>
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<tr class="memitem:ac8431d9452c9698a012597e6560c72fa inherit pub_methods_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#ac8431d9452c9698a012597e6560c72fa">trackable</a> (const <a class="el" href="structsigc_1_1trackable.html">trackable</a>& src) noexcept</td></tr>
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<tr class="memitem:aba42ed8afb6598106cf68c18a7387f18 inherit pub_methods_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#aba42ed8afb6598106cf68c18a7387f18">trackable</a> (<a class="el" href="structsigc_1_1trackable.html">trackable</a>&& src)</td></tr>
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<tr class="memitem:a75587da09e30031db7a2519843f1f4fb inherit pub_methods_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a75587da09e30031db7a2519843f1f4fb">~trackable</a> ()</td></tr>
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<tr class="memitem:ab14931670837728e49bb5ca88fb16db5 inherit pub_methods_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#ab14931670837728e49bb5ca88fb16db5">add_destroy_notify_callback</a> (void* data, <a class="el" href="structsigc_1_1trackable.html#a3338954d7565534bd945290b798e13ed">func_destroy_notify</a> func) const </td></tr>
<tr class="memdesc:ab14931670837728e49bb5ca88fb16db5 inherit pub_methods_structsigc_1_1trackable"><td class="mdescLeft"> </td><td class="mdescRight">Add a callback that is executed (notified) when the trackable object is detroyed. <a href="#ab14931670837728e49bb5ca88fb16db5">More...</a><br /></td></tr>
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<tr class="memitem:af2e23cfe7adc1ca844a3350bbac557cb inherit pub_methods_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#af2e23cfe7adc1ca844a3350bbac557cb">notify_callbacks</a> ()</td></tr>
<tr class="memdesc:af2e23cfe7adc1ca844a3350bbac557cb inherit pub_methods_structsigc_1_1trackable"><td class="mdescLeft"> </td><td class="mdescRight">Execute and remove all previously installed callbacks. <a href="#af2e23cfe7adc1ca844a3350bbac557cb">More...</a><br /></td></tr>
<tr class="separator:af2e23cfe7adc1ca844a3350bbac557cb inherit pub_methods_structsigc_1_1trackable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7494fbad23a65932ff1457d00d4edaf5 inherit pub_methods_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1trackable.html">trackable</a>& </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a7494fbad23a65932ff1457d00d4edaf5">operator=</a> (const <a class="el" href="structsigc_1_1trackable.html">trackable</a>& src)</td></tr>
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<tr class="memitem:ac3d61cdb452dc46fcdc8a8d42d9c079d inherit pub_methods_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1trackable.html">trackable</a>& </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#ac3d61cdb452dc46fcdc8a8d42d9c079d">operator=</a> (<a class="el" href="structsigc_1_1trackable.html">trackable</a>&& src)</td></tr>
<tr class="separator:ac3d61cdb452dc46fcdc8a8d42d9c079d inherit pub_methods_structsigc_1_1trackable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8b9dffa8a50ff13ba33e6c7f10468e2b inherit pub_methods_structsigc_1_1trackable"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a8b9dffa8a50ff13ba33e6c7f10468e2b">remove_destroy_notify_callback</a> (void* data) const </td></tr>
<tr class="memdesc:a8b9dffa8a50ff13ba33e6c7f10468e2b inherit pub_methods_structsigc_1_1trackable"><td class="mdescLeft"> </td><td class="mdescRight">Remove a callback previously installed with <a class="el" href="structsigc_1_1trackable.html#ab14931670837728e49bb5ca88fb16db5" title="Add a callback that is executed (notified) when the trackable object is detroyed. ...">add_destroy_notify_callback()</a>. <a href="#a8b9dffa8a50ff13ba33e6c7f10468e2b">More...</a><br /></td></tr>
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</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a>
Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pro_types_structsigc_1_1signal__base"><td colspan="2" onclick="javascript:toggleInherit('pro_types_structsigc_1_1signal__base')"><img src="closed.png" alt="-"/> Protected Types inherited from <a class="el" href="structsigc_1_1signal__base.html">sigc::signal_base</a></td></tr>
<tr class="memitem:a328b132e5dfb99dbc3aae1e5c3bb0981 inherit pro_types_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="structsigc_1_1slot__iterator.html">internal::signal_impl::iterator_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a328b132e5dfb99dbc3aae1e5c3bb0981">iterator_type</a></td></tr>
<tr class="separator:a328b132e5dfb99dbc3aae1e5c3bb0981 inherit pro_types_structsigc_1_1signal__base"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pro_methods_structsigc_1_1signal__base"><td colspan="2" onclick="javascript:toggleInherit('pro_methods_structsigc_1_1signal__base')"><img src="closed.png" alt="-"/> Protected Member Functions inherited from <a class="el" href="structsigc_1_1signal__base.html">sigc::signal_base</a></td></tr>
<tr class="memitem:a5c89a76a27d69c512f554b841b1bd08a inherit pro_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1signal__base.html#a328b132e5dfb99dbc3aae1e5c3bb0981">iterator_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a5c89a76a27d69c512f554b841b1bd08a">connect</a> (const <a class="el" href="classsigc_1_1slot__base.html">slot_base</a>& slot_)</td></tr>
<tr class="memdesc:a5c89a76a27d69c512f554b841b1bd08a inherit pro_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Adds a slot at the end of the list of slots. <a href="#a5c89a76a27d69c512f554b841b1bd08a">More...</a><br /></td></tr>
<tr class="separator:a5c89a76a27d69c512f554b841b1bd08a inherit pro_methods_structsigc_1_1signal__base"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a50eab6d37728bbbf3beb21d684a72e6c inherit pro_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1signal__base.html#a328b132e5dfb99dbc3aae1e5c3bb0981">iterator_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a50eab6d37728bbbf3beb21d684a72e6c">connect</a> (<a class="el" href="classsigc_1_1slot__base.html">slot_base</a>&& slot_)</td></tr>
<tr class="memdesc:a50eab6d37728bbbf3beb21d684a72e6c inherit pro_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Adds a slot at the end of the list of slots. <a href="#a50eab6d37728bbbf3beb21d684a72e6c">More...</a><br /></td></tr>
<tr class="separator:a50eab6d37728bbbf3beb21d684a72e6c inherit pro_methods_structsigc_1_1signal__base"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a21efc57eea29c3139855909ad4807984 inherit pro_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1signal__base.html#a328b132e5dfb99dbc3aae1e5c3bb0981">iterator_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a21efc57eea29c3139855909ad4807984">erase</a> (<a class="el" href="structsigc_1_1signal__base.html#a328b132e5dfb99dbc3aae1e5c3bb0981">iterator_type</a> i)</td></tr>
<tr class="memdesc:a21efc57eea29c3139855909ad4807984 inherit pro_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Removes the slot at the given position from the list of slots. <a href="#a21efc57eea29c3139855909ad4807984">More...</a><br /></td></tr>
<tr class="separator:a21efc57eea29c3139855909ad4807984 inherit pro_methods_structsigc_1_1signal__base"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab1b7d9bc2a59c4c67d0123a65a7baab9 inherit pro_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top">internal::signal_impl* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#ab1b7d9bc2a59c4c67d0123a65a7baab9">impl</a> () const </td></tr>
<tr class="memdesc:ab1b7d9bc2a59c4c67d0123a65a7baab9 inherit pro_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Returns the signal_impl object encapsulating the list of slots. <a href="#ab1b7d9bc2a59c4c67d0123a65a7baab9">More...</a><br /></td></tr>
<tr class="separator:ab1b7d9bc2a59c4c67d0123a65a7baab9 inherit pro_methods_structsigc_1_1signal__base"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a87da23ad801faa9e2b6b4be2a747e757 inherit pro_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1signal__base.html#a328b132e5dfb99dbc3aae1e5c3bb0981">iterator_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a87da23ad801faa9e2b6b4be2a747e757">insert</a> (<a class="el" href="structsigc_1_1signal__base.html#a328b132e5dfb99dbc3aae1e5c3bb0981">iterator_type</a> i, const <a class="el" href="classsigc_1_1slot__base.html">slot_base</a>& slot_)</td></tr>
<tr class="memdesc:a87da23ad801faa9e2b6b4be2a747e757 inherit pro_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Adds a slot at the given position into the list of slots. <a href="#a87da23ad801faa9e2b6b4be2a747e757">More...</a><br /></td></tr>
<tr class="separator:a87da23ad801faa9e2b6b4be2a747e757 inherit pro_methods_structsigc_1_1signal__base"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa80c33868910139dd2f511afcc31b687 inherit pro_methods_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1signal__base.html#a328b132e5dfb99dbc3aae1e5c3bb0981">iterator_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#aa80c33868910139dd2f511afcc31b687">insert</a> (<a class="el" href="structsigc_1_1signal__base.html#a328b132e5dfb99dbc3aae1e5c3bb0981">iterator_type</a> i, <a class="el" href="classsigc_1_1slot__base.html">slot_base</a>&& slot_)</td></tr>
<tr class="memdesc:aa80c33868910139dd2f511afcc31b687 inherit pro_methods_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">Adds a slot at the given position into the list of slots. <a href="#aa80c33868910139dd2f511afcc31b687">More...</a><br /></td></tr>
<tr class="separator:aa80c33868910139dd2f511afcc31b687 inherit pro_methods_structsigc_1_1signal__base"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pro_attribs_structsigc_1_1signal__base"><td colspan="2" onclick="javascript:toggleInherit('pro_attribs_structsigc_1_1signal__base')"><img src="closed.png" alt="-"/> Protected Attributes inherited from <a class="el" href="structsigc_1_1signal__base.html">sigc::signal_base</a></td></tr>
<tr class="memitem:a747d448c28fd256ef580d165eb69f17a inherit pro_attribs_structsigc_1_1signal__base"><td class="memItemLeft" align="right" valign="top">internal::signal_impl* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1signal__base.html#a747d448c28fd256ef580d165eb69f17a">impl_</a></td></tr>
<tr class="memdesc:a747d448c28fd256ef580d165eb69f17a inherit pro_attribs_structsigc_1_1signal__base"><td class="mdescLeft"> </td><td class="mdescRight">The signal_impl object encapsulating the slot list. <a href="#a747d448c28fd256ef580d165eb69f17a">More...</a><br /></td></tr>
<tr class="separator:a747d448c28fd256ef580d165eb69f17a inherit pro_attribs_structsigc_1_1signal__base"><td class="memSeparator" colspan="2"> </td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<class T_return, class T_arg1, class T_arg2, class T_accumulator = nil><br />
class sigc::signal2< T_return, T_arg1, T_arg2, T_accumulator ></h3>
<p>Signal declaration. </p>
<p><a class="el" href="classsigc_1_1signal2.html" title="Signal declaration. ">signal2</a> can be used to <a class="el" href="classsigc_1_1signal2.html#aa686af4f961b098a23d4f7276437c2b0" title="Add a slot to the list of slots. ">connect()</a> slots that are invoked during subsequent calls to <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a>. Any functor or slot can be passed into <a class="el" href="classsigc_1_1signal2.html#aa686af4f961b098a23d4f7276437c2b0" title="Add a slot to the list of slots. ">connect()</a>. It is converted into a slot implicitly.</p>
<p>If you want to connect one signal to another, use <a class="el" href="classsigc_1_1signal2.html#a6100abe9cd679c48fc3fb63ee9d289c5" title="Creates a functor that calls emit() on this signal. ">make_slot()</a> to retrieve a functor that emits the signal when invoked.</p>
<p>Be careful if you directly pass one signal into the <a class="el" href="classsigc_1_1signal2.html#aa686af4f961b098a23d4f7276437c2b0" title="Add a slot to the list of slots. ">connect()</a> method of another: a shallow copy of the signal is made and the signal's slots are not disconnected until both the signal and its clone are destroyed, which is probably not what you want.</p>
<p>The following template arguments are used:</p><ul>
<li><em>T_return</em> The desired return type for the <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a> function (may be overridden by the accumulator).</li>
<li><em>T_arg1</em> Argument type used in the definition of <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a>.</li>
<li><em>T_arg2</em> Argument type used in the definition of <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a>.</li>
<li><em>T_accumulator</em> The accumulator type used for emission. The default <code>nil</code> means that no accumulator should be used, for example if signal emission returns the return value of the last slot invoked.</li>
</ul>
<p>You should use the more convenient unnumbered <a class="el" href="classsigc_1_1signal.html" title="Convenience wrapper for the numbered sigc::signal# templates. ">sigc::signal</a> template. </p>
</div><h2 class="groupheader">Member Typedef Documentation</h2>
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template <class T_return, class T_arg1, class T_arg2, class T_accumulator = nil> </div>
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<td class="memname">typedef <a class="el" href="structsigc_1_1slot__list.html#a957838a7111e132824c10c2d5a897a0b">slot_list_type::const_iterator</a> <a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html#ad507bc5ea29adb2305f8fa91acbd30ee">const_iterator</a></td>
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template <class T_return, class T_arg1, class T_arg2, class T_accumulator = nil> </div>
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<td class="memname">typedef <a class="el" href="structsigc_1_1slot__list.html#a8293bfca54539958326f57375e4d8c14">slot_list_type::const_reverse_iterator</a> <a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html#aacb8fe57ffe01dea5c5fb5af44634287">const_reverse_iterator</a></td>
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<td class="memname">typedef internal::signal_emit2<T_return, T_arg1, T_arg2, T_accumulator> <a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html#a01379d580d21de8bc8d0d2d62e6324ea">emitter_type</a></td>
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template <class T_return, class T_arg1, class T_arg2, class T_accumulator = nil> </div>
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<td class="memname">typedef <a class="el" href="structsigc_1_1slot__list.html#a9774e07e467d9463e6e7cc7aa2f5c05f">slot_list_type::iterator</a> <a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html#a658ba1c6468882c9b1d480be2bbaf55e">iterator</a></td>
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template <class T_return, class T_arg1, class T_arg2, class T_accumulator = nil> </div>
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<td class="memname">typedef emitter_type::result_type <a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html#a55151695417c33540357ff524bfe2665">result_type</a></td>
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template <class T_return, class T_arg1, class T_arg2, class T_accumulator = nil> </div>
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<td class="memname">typedef <a class="el" href="structsigc_1_1slot__list.html#addb44a7590825f917b3fcf0179fadadb">slot_list_type::reverse_iterator</a> <a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html#a6710759bdeb8e626fc09d8c448e6613f">reverse_iterator</a></td>
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<td class="memname">typedef <a class="el" href="structsigc_1_1slot__list.html">slot_list</a><<a class="el" href="classsigc_1_1signal2.html#af7797ae10e76307f8d230588e760f119">slot_type</a>> <a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html#af31262f54dfb2a97540de9c4a1fc5726">slot_list_type</a></td>
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<td class="memname">typedef <a class="el" href="classsigc_1_1slot.html">slot</a><T_return(T_arg1, T_arg2)> <a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html#af7797ae10e76307f8d230588e760f119">slot_type</a></td>
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<h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<td class="memname"><a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html">signal2</a> </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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template <class T_return, class T_arg1, class T_arg2, class T_accumulator = nil> </div>
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<td class="memname"><a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html">signal2</a> </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classsigc_1_1signal2.html">signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >& </td>
<td class="paramname"><em>src</em></td><td>)</td>
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<td class="memname"><a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::<a class="el" href="classsigc_1_1signal2.html">signal2</a> </td>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname"><a class="el" href="classsigc_1_1signal2.html#a658ba1c6468882c9b1d480be2bbaf55e">iterator</a> <a class="el" href="classsigc_1_1signal2.html">sigc::signal2</a>< T_return, T_arg1, T_arg2, T_accumulator >::connect </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classsigc_1_1signal2.html#af7797ae10e76307f8d230588e760f119">slot_type</a>& </td>
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<p>Add a slot to the list of slots. </p>
<p>Any functor or slot may be passed into <a class="el" href="classsigc_1_1signal2.html#aa686af4f961b098a23d4f7276437c2b0" title="Add a slot to the list of slots. ">connect()</a>. It will be converted into a slot implicitly. The returned iterator may be stored for disconnection of the slot at some later point. It stays valid until the slot is removed from the list of slots. The iterator can also be implicitly converted into a <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection. ">sigc::connection</a> object that may be used safely beyond the life time of the slot.</p>
<p>std::function<> and C++11 lambda expressions are functors. These are examples of functors that can be connected to a signal.</p>
<p>std::bind() creates a functor, but this functor typically has an operator()() which is a variadic template. Our <a class="el" href="structsigc_1_1functor__trait.html" title="Trait that specifies the return type of any type. ">functor_trait</a> can't deduce the result type of such a functor. If you first assign the return value of std::bind() to a std::function, you can connect the std::function to a signal.</p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">slot_</td><td>The slot to add to the list of slots. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>An iterator pointing to the new slot in the list. </dd></dl>
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<td class="paramtype"><a class="el" href="classsigc_1_1signal2.html#af7797ae10e76307f8d230588e760f119">slot_type</a>&& </td>
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<p>Add a slot to the list of slots. </p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classsigc_1_1signal2.html#aa686af4f961b098a23d4f7276437c2b0" title="Add a slot to the list of slots. ">connect(const slot_type& slot_)</a>.</dd></dl>
<dl class="since_2_8"><dt><b><a class="el" href="since_2_8.html#_since_2_8000007">Since libsigc++ 2.8:</a></b></dt><dd></dd></dl>
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<td class="paramtype"><a class="el" href="namespacesigc.html#aa0d56c61023af35c47b79db80b32fd2e">type_trait_take_t</a>< T_arg1 > </td>
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<p>Triggers the emission of the signal. </p>
<p>During signal emission all slots that have been connected to the signal are invoked unless they are manually set into a blocking state. The parameters are passed on to the slots. If <em>T_accumulated</em> is not <code>nil</code>, an accumulator of this type is used to process the return values of the slot invocations. Otherwise, the return value of the last slot invoked is returned. </p><dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">_A_a1</td><td>Argument to be passed on to the slots. </td></tr>
<tr><td class="paramname">_A_a2</td><td>Argument to be passed on to the slots. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The accumulated return values of the slot invocations. </dd></dl>
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<p>Triggers the emission of the signal in reverse order (see <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a>). </p>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000045">Deprecated:</a></b></dt><dd>This is apparently not useful, but please let us know if you need it. </dd></dl>
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<p>Creates a functor that calls <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a> on this signal. </p>
<div class="fragment"><div class="line"><a class="code" href="group__mem__fun.html#gadf6b6d22c503b439019f0a2e77352419">sigc::mem_fun</a>(mysignal, &<a class="code" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080">sigc::signal2::emit</a>)</div>
</div><!-- fragment --><p> yields the same result. </p><dl class="section return"><dt>Returns</dt><dd>A functor that calls <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a> on this signal. </dd></dl>
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<p>Triggers the emission of the signal (see <a class="el" href="classsigc_1_1signal2.html#ad0bef6ff1542e3b8a6886d6a2245f080" title="Triggers the emission of the signal. ">emit()</a>). </p>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000046">Deprecated:</a></b></dt><dd>This is apparently not useful, but let us know if you need it. </dd></dl>
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<p>Creates an STL-style interface for the signal's list of slots. </p>
<p>This interface supports iteration, insertion and removal of slots. </p><dl class="section return"><dt>Returns</dt><dd>An STL-style interface for the signal's list of slots.</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000047">Deprecated:</a></b></dt><dd>This is apparently not useful, but please let us know if you need it. </dd></dl>
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<p>Creates an STL-style interface for the signal's list of slots. </p>
<p>This interface supports iteration, insertion and removal of slots. </p><dl class="section return"><dt>Returns</dt><dd>An STL-style interface for the signal's list of slots.</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000048">Deprecated:</a></b></dt><dd>This is apparently not useful, but please let us know if you need it. </dd></dl>
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