1 files changed, 47 insertions, 0 deletions
diff --git a/c_compiler/src/expression.cpp b/c_compiler/src/expression.cpp
index d9a366b..29bfe0d 100644
--- a/c_compiler/src/expression.cpp
+++ b/c_compiler/src/expression.cpp
@@ -5,12 +5,50 @@
 
 // Expression definition
 
+Expression::~Expression()
+{}
+
 void Expression::print() const
 {}
 
 void Expression::printxml() const
 {}
 
+int32_t Expression::getPostfixStackPosition(VariableStackBindings bindings) const
+{
+    return -1;
+}
+
+
+// OperationExpression definition
+
+OperationExpression::OperationExpression(Expression* _lhs, Expression* _rhs)
+    : lhs(_lhs), rhs(_rhs)
+{}
+
+OperationExpression::~OperationExpression()
+{
+    delete lhs;
+    delete rhs;
+}
+
+
+// Assignment Expression definition
+
+AssignmentExpression::AssignmentExpression(Expression* _lhs, Expression* _rhs)
+    : OperationExpression(_lhs, _rhs)
+{}
+
+VariableStackBindings AssignmentExpression::printasm(VariableStackBindings bindings) const
+{
+    int32_t store_stack_position = lhs->getPostfixStackPosition(bindings);
+    rhs->printasm(bindings);
+
+    std::cout << "\tsw\t$2," << store_stack_position << "($fp)" << std::endl;
+								   
+    return bindings;
+}
+
 
 // Identifier definition
 
@@ -30,6 +68,15 @@ VariableStackBindings Identifier::printasm(VariableStackBindings bindings) const
     return bindings;
 }
 
+int32_t Identifier::getPostfixStackPosition(VariableStackBindings bindings) const
+{
+    if(bindings.bindingExists(m_id)) {
+	return bindings.getStackPosition(m_id);
+    }
+
+    return -1;
+}
+
 
 // Constant definition