 std::string res = <span class="stringliteral">&quot;&quot;</span>, context = <span class="stringliteral">&quot;&quot;</span>;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;                <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 1; i &lt; prob_.f_.N(); ++i) {</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;                        context += BOS_TOK + <span class="stringliteral">&quot; &quot;</