-
Notifications
You must be signed in to change notification settings - Fork 0
/
BinaryExpression.cpp
131 lines (117 loc) · 2.82 KB
/
BinaryExpression.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
#include "BinaryExpression.h"
BinaryExpression::BinaryExpression(BinaryExpressionType type, Expression* left, Expression* right)
: Expression(), m_type(type), m_left(left), m_right(right)
{
}
QVariant::Type BinaryExpression::type() const
{
return m_left->type();
}
QVariant BinaryExpression::evaluate()
{
QVariant leftValue = m_left->evaluate();
QVariant rightValue = m_right->evaluate();
QVariant result;
switch(m_type)
{
case BinaryExpression::Addition:
result = doAdd(leftValue,rightValue);
break;
case BinaryExpression::Subtraction:
result = doSub(leftValue, rightValue);
break;
case BinaryExpression::Multiplication:
result = doMul(leftValue, rightValue);
break;
case BinaryExpression::Division:
result = doDiv(leftValue, rightValue);
break;
case BinaryExpression::Modulo:
result = doModulo(leftValue, rightValue);
break;
default:
break;
}
return result;
}
QVariant BinaryExpression::doAdd(QVariant left, QVariant right)
{
switch(left.type())
{
case QVariant::Int:
return left.toInt() + right.toInt();
case QVariant::Double:
return left.toFloat() + right.toFloat();
case QVariant::String:
return left.toString() + right.toString();
default:
return QVariant();
}
}
QVariant BinaryExpression::doSub(QVariant left, QVariant right)
{
if(left.type() == QVariant::String || right.type() == QVariant::String)
{
showErrorMessage("You cannot subtract two strings");
return QVariant();
}
switch(left.type())
{
case QVariant::Int:
return left.toInt() - right.toInt();
case QVariant::Double:
return left.toDouble() - right.toDouble();
default:
return QVariant();
}
}
QVariant BinaryExpression::doMul(QVariant left, QVariant right)
{
if(left.type() == QVariant::String || right.type() == QVariant::String)
{
showErrorMessage("You cannot multiply with a string");
return QVariant();
}
switch(left.type())
{
case QVariant::Int:
return left.toInt() * right.toInt();
case QVariant::Double:
return left.toDouble() * right.toDouble();
default:
return QVariant();
}
}
QVariant BinaryExpression::doDiv(QVariant left, QVariant right)
{
if(left.type() == QVariant::String || right.type() == QVariant::String)
{
showErrorMessage("You cannot divide with a string");
return QVariant();
}
switch(left.type())
{
case QVariant::Int:
return left.toInt() / right.toInt();
case QVariant::Double:
return left.toDouble() / right.toDouble();
default:
return QVariant();
}
}
QVariant BinaryExpression::doModulo(QVariant left, QVariant right)
{
if(left.type() == QVariant::String || right.type() == QVariant::String)
{
showErrorMessage("You cannot get the remainder of a string");
return QVariant();
}
switch(left.type())
{
case QVariant::Int:
case QVariant::Double:
return left.toInt() % right.toInt();
default:
return QVariant();
}
}