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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Clingo C API: ast.c</title>
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<div id="projectname">Clingo C API
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<div id="projectbrief">C API for clingo providing high level functions to control grounding and solving.</div>
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<p>The example shows how to rewrite a non-ground logic program.</p><h2>Output</h2>
<div class="fragment"><div class="line">./ast 0</div><div class="line">Solving with enable = <span class="keyword">false</span>...</div><div class="line">Model:</div><div class="line">Solving with enable = <span class="keyword">true</span>...</div><div class="line">Model: enable a</div><div class="line">Model: enable b</div><div class="line">Solving with enable = <span class="keyword">false</span>...</div><div class="line">Model:</div></div><!-- fragment --><h2>Code</h2>
<div class="fragment"><div class="line"><span class="preprocessor">#include <<a class="code" href="clingo_8h.html">clingo.h</a>></span></div><div class="line"><span class="preprocessor">#include <stdlib.h></span></div><div class="line"><span class="preprocessor">#include <stdio.h></span></div><div class="line"></div><div class="line"><span class="keywordtype">bool</span> print_model(<a class="code" href="group__Model.html#gaaf9a93819f023f3cb8aa80598c46556b">clingo_model_t</a> *model) {</div><div class="line"> <span class="keywordtype">bool</span> ret = <span class="keyword">true</span>;</div><div class="line"> <a class="code" href="group__Symbols.html#ga6c75c60fa57c3b97505265ff08f6f951">clingo_symbol_t</a> *atoms = NULL;</div><div class="line"> <span class="keywordtype">size_t</span> atoms_n;</div><div class="line"> <a class="code" href="group__Symbols.html#ga6c75c60fa57c3b97505265ff08f6f951">clingo_symbol_t</a> <span class="keyword">const</span> *it, *ie;</div><div class="line"> <span class="keywordtype">char</span> *str = NULL;</div><div class="line"> <span class="keywordtype">size_t</span> str_n = 0;</div><div class="line"></div><div class="line"> <span class="comment">// determine the number of (shown) symbols in the model</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a0"></a><a class="code" href="group__Model.html#ga19a05934acb060994eed7cd079d1a0fb">clingo_model_symbols_size</a>(model, <a name="a1"></a><a class="code" href="group__Model.html#ggaa943fe81f0874ea63820b627bc19845ca82a698ef41cd919cb370d22fc0b44826">clingo_show_type_shown</a>, &atoms_n)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="comment">// allocate required memory to hold all the symbols</span></div><div class="line"> <span class="keywordflow">if</span> (!(atoms = (<a class="code" href="group__Symbols.html#ga6c75c60fa57c3b97505265ff08f6f951">clingo_symbol_t</a>*)malloc(<span class="keyword">sizeof</span>(*atoms) * atoms_n))) {</div><div class="line"> <a name="a2"></a><a class="code" href="group__BasicTypes.html#ga5c2b2943475239e151eb783d30548b38">clingo_set_error</a>(<a name="a3"></a><a class="code" href="group__BasicTypes.html#gga5adba1f5e366e7489ac4a3fb5266dba6aa14a0926eb3e653fcc13299b33d8d348">clingo_error_bad_alloc</a>, <span class="stringliteral">"could not allocate memory for atoms"</span>);</div><div class="line"> <span class="keywordflow">goto</span> error;</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// retrieve the symbols in the model</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a4"></a><a class="code" href="group__Model.html#ga7ffb82aac782e7c623a2009b76830cdd">clingo_model_symbols</a>(model, <a class="code" href="group__Model.html#ggaa943fe81f0874ea63820b627bc19845ca82a698ef41cd919cb370d22fc0b44826">clingo_show_type_shown</a>, atoms, atoms_n)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> printf(<span class="stringliteral">"Model:"</span>);</div><div class="line"></div><div class="line"> <span class="keywordflow">for</span> (it = atoms, ie = atoms + atoms_n; it != ie; ++it) {</div><div class="line"> <span class="keywordtype">size_t</span> n;</div><div class="line"> <span class="keywordtype">char</span> *str_new;</div><div class="line"></div><div class="line"> <span class="comment">// determine size of the string representation of the next symbol in the model</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a5"></a><a class="code" href="group__Symbols.html#ga6963e11f6d22a5c04a0e50d1afe1f4f5">clingo_symbol_to_string_size</a>(*it, &n)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="keywordflow">if</span> (str_n < n) {</div><div class="line"> <span class="comment">// allocate required memory to hold the symbol's string</span></div><div class="line"> <span class="keywordflow">if</span> (!(str_new = (<span class="keywordtype">char</span>*)realloc(str, <span class="keyword">sizeof</span>(*str) * n))) {</div><div class="line"> <a class="code" href="group__BasicTypes.html#ga5c2b2943475239e151eb783d30548b38">clingo_set_error</a>(<a class="code" href="group__BasicTypes.html#gga5adba1f5e366e7489ac4a3fb5266dba6aa14a0926eb3e653fcc13299b33d8d348">clingo_error_bad_alloc</a>, <span class="stringliteral">"could not allocate memory for symbol's string"</span>);</div><div class="line"> <span class="keywordflow">goto</span> error;</div><div class="line"> }</div><div class="line"></div><div class="line"> str = str_new;</div><div class="line"> str_n = n;</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// retrieve the symbol's string</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a6"></a><a class="code" href="group__Symbols.html#gac292526ba129269eec3c64510deec3b0">clingo_symbol_to_string</a>(*it, str, n)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> printf(<span class="stringliteral">" %s"</span>, str);</div><div class="line"> }</div><div class="line"></div><div class="line"> printf(<span class="stringliteral">"\n"</span>);</div><div class="line"> <span class="keywordflow">goto</span> out;</div><div class="line"></div><div class="line">error:</div><div class="line"> ret = <span class="keyword">false</span>;</div><div class="line"></div><div class="line">out:</div><div class="line"> <span class="keywordflow">if</span> (atoms) { free(atoms); }</div><div class="line"> <span class="keywordflow">if</span> (str) { free(str); }</div><div class="line"></div><div class="line"> <span class="keywordflow">return</span> ret;</div><div class="line">}</div><div class="line"></div><div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{</div><div class="line"> <a name="_a7"></a><a class="code" href="structclingo__ast__term.html">clingo_ast_term_t</a> atom;</div><div class="line"> <a class="code" href="group__ProgramBuilder.html#gaf3ea2b021e93cdcc0f6c7b4219e4a06d">clingo_program_builder_t</a> *builder;</div><div class="line">} on_statement_data;</div><div class="line"></div><div class="line"><span class="comment">// adds atom enable to all rule bodies</span></div><div class="line"><span class="keywordtype">bool</span> on_statement (<a name="_a8"></a><a class="code" href="structclingo__ast__statement.html">clingo_ast_statement_t</a> <span class="keyword">const</span> *stm, on_statement_data *data) {</div><div class="line"> <span class="keywordtype">bool</span> ret = <span class="keyword">true</span>;</div><div class="line"> <a name="_a9"></a><a class="code" href="structclingo__ast__rule.html">clingo_ast_rule_t</a> rule;</div><div class="line"> <a name="_a10"></a><a class="code" href="structclingo__ast__body__literal.html">clingo_ast_body_literal_t</a> *body = NULL;</div><div class="line"> <a name="_a11"></a><a class="code" href="structclingo__ast__literal.html">clingo_ast_literal_t</a> lit;</div><div class="line"> <a class="code" href="structclingo__ast__statement.html">clingo_ast_statement_t</a> stm2;</div><div class="line"></div><div class="line"> <span class="comment">// pass through all statements that are not rules</span></div><div class="line"> <span class="keywordflow">if</span> (stm-><a name="a12"></a>type != clingo_ast_statement_type_rule) {</div><div class="line"> <span class="keywordflow">if</span> (!<a name="a13"></a><a class="code" href="group__ProgramBuilder.html#ga9254fa9b00d23b977c870396ee3f87ae">clingo_program_builder_add</a>(data->builder, stm)) { <span class="keywordflow">goto</span> error; }</div><div class="line"> <span class="keywordflow">goto</span> out;</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// allocate space to hold the current rule body + one literal</span></div><div class="line"> body = (<a class="code" href="structclingo__ast__body__literal.html">clingo_ast_body_literal_t</a>*)malloc(<span class="keyword">sizeof</span>(<a class="code" href="structclingo__ast__body__literal.html">clingo_ast_body_literal_t</a>) * (stm-><a name="a14"></a>rule-><a name="a15"></a>size + 1));</div><div class="line"> <span class="keywordflow">if</span> (!body) {</div><div class="line"> <a class="code" href="group__BasicTypes.html#ga5c2b2943475239e151eb783d30548b38">clingo_set_error</a>(<a class="code" href="group__BasicTypes.html#gga5adba1f5e366e7489ac4a3fb5266dba6aa14a0926eb3e653fcc13299b33d8d348">clingo_error_bad_alloc</a>, <span class="stringliteral">"could not allocate memory for rule body"</span>);</div><div class="line"> <span class="keywordflow">goto</span> error;</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// copy the current rule body</span></div><div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < stm->rule->size; ++i) {</div><div class="line"> body[i] = stm->rule-><a name="a16"></a>body[i];</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// create atom enable</span></div><div class="line"> lit.<a name="a17"></a>symbol = &data->atom;</div><div class="line"> lit.<a name="a18"></a>location = data->atom.location;</div><div class="line"> lit.<a name="a19"></a>type = clingo_ast_literal_type_symbolic;</div><div class="line"> lit.<a name="a20"></a>sign = clingo_ast_sign_none;</div><div class="line"></div><div class="line"> <span class="comment">// add atom enable to the rule body</span></div><div class="line"> body[stm->rule->size].<a name="a21"></a>location = data->atom.location;</div><div class="line"> body[stm->rule->size].<a name="a22"></a>type = clingo_ast_body_literal_type_literal;</div><div class="line"> body[stm->rule->size].<a name="a23"></a>sign = clingo_ast_sign_none;</div><div class="line"> body[stm->rule->size].<a name="a24"></a>literal = &lit;</div><div class="line"></div><div class="line"> <span class="comment">// initialize the rule</span></div><div class="line"> rule.<a name="a25"></a>head = stm->rule->head;</div><div class="line"> rule.size = stm->rule->size + 1;</div><div class="line"> rule.body = body;</div><div class="line"></div><div class="line"> <span class="comment">// initialize the statement</span></div><div class="line"> stm2.<a name="a26"></a>location = stm->location;</div><div class="line"> stm2.type = stm->type;</div><div class="line"> stm2.rule = &rule;</div><div class="line"></div><div class="line"> <span class="comment">// add the rewritten statement to the program</span></div><div class="line"> <span class="keywordflow">if</span> (!<a class="code" href="group__ProgramBuilder.html#ga9254fa9b00d23b977c870396ee3f87ae">clingo_program_builder_add</a>(data->builder, &stm2)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="keywordflow">goto</span> out;</div><div class="line"></div><div class="line">error:</div><div class="line"> ret = <span class="keyword">false</span>;</div><div class="line"></div><div class="line">out:</div><div class="line"> <span class="keywordflow">if</span> (body) { free(body); }</div><div class="line"></div><div class="line"> <span class="keywordflow">return</span> ret;</div><div class="line">}</div><div class="line"></div><div class="line"><span class="keywordtype">bool</span> solve(<a class="code" href="group__Control.html#gaf008e9db9dbb37b0b7ef039bb9d582f0">clingo_control_t</a> *ctl, <a class="code" href="group__Control.html#gae917a23b0591d181004ec88c4e3291c1">clingo_solve_result_bitset_t</a> *result) {</div><div class="line"> <span class="keywordtype">bool</span> ret = <span class="keyword">true</span>;</div><div class="line"> <a class="code" href="group__SolveHandle.html#ga023c1084a4c01ea6e121a8310efba045">clingo_solve_handle_t</a> *handle;</div><div class="line"> <a class="code" href="group__Model.html#gaaf9a93819f023f3cb8aa80598c46556b">clingo_model_t</a> *model;</div><div class="line"></div><div class="line"> <span class="comment">// get a solve handle</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a27"></a><a class="code" href="group__Control.html#ga0d0d3f09cbfbc2c7f92b7f0a87a13590">clingo_control_solve</a>(ctl, <a name="a28"></a><a class="code" href="group__SolveHandle.html#gga2cfdeafd2caf82e14349e639f298a35fa60a9c133be636e68a7d02680c8b9d47e">clingo_solve_mode_yield</a>, NULL, 0, NULL, NULL, &handle)) { <span class="keywordflow">goto</span> error; }</div><div class="line"> <span class="comment">// loop over all models</span></div><div class="line"> <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div><div class="line"> <span class="keywordflow">if</span> (!<a name="a29"></a><a class="code" href="group__SolveHandle.html#ga73d71df7adeee92f1d515f52cdcbbac0">clingo_solve_handle_resume</a>(handle)) { <span class="keywordflow">goto</span> error; }</div><div class="line"> <span class="keywordflow">if</span> (!<a name="a30"></a><a class="code" href="group__SolveHandle.html#ga41635407591fcad87b474a9af32aacd4">clingo_solve_handle_model</a>(handle, &model)) { <span class="keywordflow">goto</span> error; }</div><div class="line"> <span class="comment">// print the model</span></div><div class="line"> <span class="keywordflow">if</span> (model) { print_model(model); }</div><div class="line"> <span class="comment">// stop if there are no more models</span></div><div class="line"> <span class="keywordflow">else</span> { <span class="keywordflow">break</span>; }</div><div class="line"> }</div><div class="line"> <span class="comment">// close the solve handle</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a31"></a><a class="code" href="group__SolveHandle.html#gae4270b7d4d0174a479307438680007c5">clingo_solve_handle_get</a>(handle, result)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="keywordflow">goto</span> out;</div><div class="line"></div><div class="line">error:</div><div class="line"> ret = <span class="keyword">false</span>;</div><div class="line"></div><div class="line">out:</div><div class="line"> <span class="comment">// free the solve handle</span></div><div class="line"> <span class="keywordflow">return</span> <a name="a32"></a><a class="code" href="group__SolveHandle.html#ga488b76e7240d625bd4066e68a33ab23e">clingo_solve_handle_close</a>(handle) && ret;</div><div class="line">}</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> <span class="keyword">const</span> **argv) {</div><div class="line"> <span class="keywordtype">char</span> <span class="keyword">const</span> *error_message;</div><div class="line"> <span class="keywordtype">int</span> ret = 0;</div><div class="line"> <a class="code" href="group__Control.html#gae917a23b0591d181004ec88c4e3291c1">clingo_solve_result_bitset_t</a> solve_ret;</div><div class="line"> <a class="code" href="group__Control.html#gaf008e9db9dbb37b0b7ef039bb9d582f0">clingo_control_t</a> *ctl = NULL;</div><div class="line"> <a class="code" href="group__SolveHandle.html#ga023c1084a4c01ea6e121a8310efba045">clingo_solve_handle_t</a> *handle = NULL;</div><div class="line"> <a class="code" href="group__Symbols.html#ga6c75c60fa57c3b97505265ff08f6f951">clingo_symbol_t</a> sym;</div><div class="line"> <a name="_a33"></a><a class="code" href="structclingo__location.html">clingo_location_t</a> location;</div><div class="line"> <a class="code" href="structclingo__ast__statement.html">clingo_ast_statement_t</a> stm;</div><div class="line"> <a name="_a34"></a><a class="code" href="structclingo__ast__external.html">clingo_ast_external_t</a> ext;</div><div class="line"> on_statement_data data;</div><div class="line"> <a name="_a35"></a><a class="code" href="structclingo__part.html">clingo_part_t</a> parts[] = {{ <span class="stringliteral">"base"</span>, NULL, 0 }};</div><div class="line"></div><div class="line"> <span class="comment">// create a control object and pass command line arguments</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a36"></a><a class="code" href="group__Control.html#ga7ec38c676e45447bab71278b51e090c6">clingo_control_new</a>(argv+1, argc-1, NULL, NULL, 20, &ctl) != 0) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="comment">// get the program builder</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a37"></a><a class="code" href="group__Control.html#ga7b0079d98992f7036e3f7e7168b417a3">clingo_control_program_builder</a>(ctl, &data.builder)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="comment">// initialize the location</span></div><div class="line"> location.<a name="a38"></a><a class="code" href="structclingo__location.html#a7e1cc6f6d6086bded33e3f9adbb16b90">begin_line</a> = location.<a name="a39"></a><a class="code" href="structclingo__location.html#a8fe7fd90b5eb6ae1885abc55ae40a6b0">end_line</a> = 0;</div><div class="line"> location.<a name="a40"></a><a class="code" href="structclingo__location.html#afe5db4636f00e6f9ee2bdb371591b4d6">begin_column</a> = location.<a name="a41"></a><a class="code" href="structclingo__location.html#a69787609f3a62fb6156c01f72bcddab2">end_column</a> = 0;</div><div class="line"> location.<a name="a42"></a><a class="code" href="structclingo__location.html#af09373d7b6ffdec84a27787724500697">begin_file</a> = location.<a name="a43"></a><a class="code" href="structclingo__location.html#a3dabe65d33b291ed9c289ab618612d47">end_file</a> = <span class="stringliteral">"<rewrite>"</span>;</div><div class="line"></div><div class="line"> <span class="comment">// initilize atom to add</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a44"></a><a class="code" href="group__Symbols.html#ga5ee71976a0322a1f4bec4e283787b360">clingo_symbol_create_id</a>(<span class="stringliteral">"enable"</span>, <span class="keyword">true</span>, &sym)) { <span class="keywordflow">goto</span> error; }</div><div class="line"> data.atom.location = location;</div><div class="line"> data.atom.type = clingo_ast_term_type_symbol;</div><div class="line"> data.atom.symbol = sym;</div><div class="line"></div><div class="line"> <span class="comment">// begin building a program</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a45"></a><a class="code" href="group__ProgramBuilder.html#ga24041cf092eeda6aeb67ce496a5bb3d5">clingo_program_builder_begin</a>(data.builder)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="comment">// get the AST of the program</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a46"></a><a class="code" href="group__AST.html#ga8b24508837d8aadbd160e7cb37cbb7da">clingo_parse_program</a>(<span class="stringliteral">"a :- not b. b :- not a."</span>, (clingo_ast_callback_t)on_statement, &data, NULL, NULL, 20)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="comment">// add the external statement: #external enable.</span></div><div class="line"> ext.<a name="a47"></a>atom = data.atom;</div><div class="line"> ext.<a name="a48"></a>body = NULL;</div><div class="line"> ext.<a name="a49"></a>size = 0;</div><div class="line"> stm.location = location;</div><div class="line"> stm.type = clingo_ast_statement_type_external;</div><div class="line"> stm.<a name="a50"></a>external = &ext;</div><div class="line"> <span class="keywordflow">if</span> (!<a class="code" href="group__ProgramBuilder.html#ga9254fa9b00d23b977c870396ee3f87ae">clingo_program_builder_add</a>(data.builder, &stm)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="comment">// finish building a program</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a51"></a><a class="code" href="group__ProgramBuilder.html#ga82198c84afe8f9bb754ebbc4c6c78a25">clingo_program_builder_end</a>(data.builder)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="comment">// ground the base part</span></div><div class="line"> <span class="keywordflow">if</span> (!<a name="a52"></a><a class="code" href="group__Control.html#gaf85b77055668171e6a85f9d729719b57">clingo_control_ground</a>(ctl, parts, 1, NULL, NULL)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="comment">// solve with external enable = false</span></div><div class="line"> printf(<span class="stringliteral">"Solving with enable = false...\n"</span>);</div><div class="line"> <span class="keywordflow">if</span> (!solve(ctl, &solve_ret)) { <span class="keywordflow">goto</span> error; }</div><div class="line"> <span class="comment">// solve with external enable = true</span></div><div class="line"> printf(<span class="stringliteral">"Solving with enable = true...\n"</span>);</div><div class="line"> <span class="keywordflow">if</span> (!<a name="a53"></a><a class="code" href="group__Control.html#gabfb36cbbefeced31582f2d66e2cdc6e8">clingo_control_assign_external</a>(ctl, sym, <a name="a54"></a><a class="code" href="group__BasicTypes.html#gga6847b34622ab224c5867a84ef9c08126a304e39ab32ecb495a7a13626a3125276">clingo_truth_value_true</a>)) { <span class="keywordflow">goto</span> error; }</div><div class="line"> <span class="keywordflow">if</span> (!solve(ctl, &solve_ret)) { <span class="keywordflow">goto</span> error; }</div><div class="line"> <span class="comment">// solve with external enable = false</span></div><div class="line"> printf(<span class="stringliteral">"Solving with enable = false...\n"</span>);</div><div class="line"> <span class="keywordflow">if</span> (!<a class="code" href="group__Control.html#gabfb36cbbefeced31582f2d66e2cdc6e8">clingo_control_assign_external</a>(ctl, sym, <a name="a55"></a><a class="code" href="group__BasicTypes.html#gga6847b34622ab224c5867a84ef9c08126a2ac4886c8ca9dfd7f0d70cd24e07cf52">clingo_truth_value_false</a>)) { <span class="keywordflow">goto</span> error; }</div><div class="line"> <span class="keywordflow">if</span> (!solve(ctl, &solve_ret)) { <span class="keywordflow">goto</span> error; }</div><div class="line"></div><div class="line"> <span class="keywordflow">goto</span> out;</div><div class="line"></div><div class="line">error:</div><div class="line"> <span class="keywordflow">if</span> (!(error_message = <a name="a56"></a><a class="code" href="group__BasicTypes.html#ga72da180a7e7300f5f38003450cce900a">clingo_error_message</a>())) { error_message = <span class="stringliteral">"error"</span>; }</div><div class="line"></div><div class="line"> printf(<span class="stringliteral">"%s\n"</span>, error_message);</div><div class="line"> ret = <a name="a57"></a><a class="code" href="group__BasicTypes.html#gab6fae458db566efb7d6684ffda376aa8">clingo_error_code</a>();</div><div class="line"></div><div class="line">out:</div><div class="line"> <span class="keywordflow">if</span> (handle) { <a class="code" href="group__SolveHandle.html#ga488b76e7240d625bd4066e68a33ab23e">clingo_solve_handle_close</a>(handle); }</div><div class="line"> <span class="keywordflow">if</span> (ctl) { <a name="a58"></a><a class="code" href="group__Control.html#ga849604bd7107e6948a0e08e1dc10178a">clingo_control_free</a>(ctl); }</div><div class="line"></div><div class="line"> <span class="keywordflow">return</span> ret;</div><div class="line">}</div><div class="line"></div></div><!-- fragment --> </div><!-- contents -->
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