C / C++ / MFC

VCalcParserTypes.h
 
<font color=blue>#include</font> <STRING>	<font color=green>// std::string</font>
 
<font color=green>// Type for the handled operands and results</font>
<font color=blue>typedef long double</font> <font color=purple>VALUES_TYPE</font>;
 
<font color=green>// Type for an entry in the answers history</font>
<font color=blue>typedef struct</font> {
    <font color=blue>const</font> std::string  m_strFormula;
    <font color=blue>const</font> <font color=purple>VALUES_TYPE</font>  m_valResult;
} <font color=purple>AnswerItem</font>; 
 
<hr>
VCalcParser.h
 
<font color=blue>#include</font> <STRING>	<font color=green>// std::string</font>
<font color=blue>#include</font> <DEQUE>	<font color=green>// std::deque</font>
<font color=blue>#include</font> <font color=gray>"VCalcParserTypes.h"</font>
 
<font color=green>////////////////////////////////////////////////////////////////
// VisualCalc 2.20 Parser...</font>
<font color=blue>class</font> CVCalcParser {
  <font color=blue>private</font>:
    <font color=green>//...</font>
    std::string             m_Source;               <font color=green>// Reference to the input stream</font>
    std::deque<<font color=purple>AnswerItem</font>>  m_dqeAnswersHistory;    <font color=green>// Answers History mapping a formula with a result</font>
 
  <font color=blue>public</font>:
    <font color=green>//Parsing functions following (in the recursive-descending order)...</font>
    <font color=purple>VALUES_TYPE</font> Evaluate(<font color=blue>const</font> std::string& Source);
    <font color=green>//...</font>
};
 
<hr>
VCalcParser.cpp
 
<font color=green>// Returns the result of the parsed formula</font>
<font color=purple>VALUES_TYPE</font> CVCalcParser::Evaluate(<font color=blue>const</font> std::string& Source) {
    <font color=blue>this</font>->ResetParserMembers(Source);
    <font color=blue>try</font> {
        <font color=purple>VALUES_TYPE</font> valResult = <font color=blue>this</font>->Level_1();
        <font color=purple>AnswerItem</font> AnsItem = { <font color=blue>this</font>->m_Source, valResult };    // <--- ERROR HERE
        <font color=blue>this</font>->m_dqeAnswersHistory.push_front(AnsItem);
        <font color=blue>return</font> valResult;
    }
    <font color=blue>catch</font> (...) {
        <font color=blue>throw</font>;
    }
}

error C2552: 'AnsItem' : non-aggregates cannot be initialized with initializer list