1 files changed, 132 insertions, 0 deletions
diff --git a/expressions.cpp b/expressions.cpp
new file mode 100644
index 0000000..e402020
--- /dev/null
+++ b/expressions.cpp
@@ -0,0 +1,132 @@
+#include <cstddef>
+#include <string>
+#include "include/lexer.hpp"
+#include "include/expressions.hpp"
+
+using std::string, std::to_string;
+
+// Literal
+Literal::Literal(int value) : Expression(NULL, NULL, number) {
+  this->value = value;
+}
+
+Literal::~Literal() {
+  delTree();
+}
+
+void Literal::setRepr() {
+  repr = to_string(value);
+}
+
+// Function.
+Function::Function(Expression *arg, trig_functions name) : Expression(NULL, NULL, function) {
+  this->arg = arg;
+  function_name = name;
+}
+
+Function::~Function() {
+  delTree();
+}
+
+trig_functions Function::getFunctionName() { return function_name; }
+
+void Function::delTree() {
+  delete arg;
+  delete this;
+}
+
+void Function::setRepr() {
+  switch(function_name) {
+  case sin:
+    repr += "sin";
+    
+    break;
+  case cos:
+    repr += "cos";
+    
+    break;
+  case tan:
+    repr += "tan";
+    
+    break;
+  case csc:
+    repr += "csc";
+    
+    break;
+  case sec:
+    repr += "sec";
+    
+    break;
+  case ctg:
+    repr += "ctg";
+    
+    break;
+  }
+
+  repr += '(';
+  repr += arg->getRepr();
+  repr += ')';
+}
+
+// Variable.
+Variable::Variable(char name) : Expression(NULL, NULL, variable) {
+  this->name = name;
+  setRepr();
+}
+
+Variable::~Variable() {
+  delTree();
+}
+
+void Variable::setRepr() {
+  repr += name;
+}
+
+// Sum.
+AddExpression::AddExpression(Expression *left, Expression *right)
+  : Expression(left, right, sum) {}
+
+AddExpression::~AddExpression() {
+  delTree();
+}
+
+// Substraction.
+SubExpression::SubExpression(Expression *left, Expression *right)
+  : Expression(left, right, substraction) {}
+
+SubExpression::~SubExpression() {
+  delTree();
+}
+
+// Negation.
+NegationExpression::NegationExpression(Expression *right)
+  : Expression(NULL, right, substraction) {}
+
+NegationExpression::~NegationExpression() {
+  delTree();
+}
+
+// División.
+DivisionExpression::DivisionExpression(Expression *left, Expression *right)
+  : Expression(left, right, division) {}
+
+DivisionExpression::~DivisionExpression() {
+  delTree();
+}
+
+// Multiplication.
+MultiplicationExpression::MultiplicationExpression(Expression *left,
+                                                   Expression *right)
+  : Expression(left, right, multiplication) {}
+
+MultiplicationExpression::~MultiplicationExpression() {
+  delTree();
+}
+
+// Power.
+PowerExpression::PowerExpression(Expression *left, Expression *right)
+  : Expression(left, right, power) {}
+
+PowerExpression::~PowerExpression() {
+  delTree();
+}