added parser

- commited parser (Michael Popov)
- changed encoding of parser.py to utf8

1 files changed, 20 insertions, 1 deletions

diff --git a/src/front/ast.py b/src/front/ast.py
index 5b4def7..751d38d 100644
--- a/src/front/ast.py
+++ b/src/front/ast.py
@@ -14,6 +14,9 @@ class Program(Node):
 
         return 0
 
+    def __repr__(self):
+        return "<Program: %s>" % self.functions
+
 class Function(Node):
     def __init__(self, name, params, statements, lineno = -1):
         self.name = name
@@ -22,7 +25,7 @@ class Function(Node):
         self.lineno = lineno
 
     def __repr__(self):
-        return "<Function: %s at line %d>" % (self.name, self.lineno)
+        return "<Function: %s %s %s>" % (self.name, str(self.params), str(self.statements))
 
     def eval(self,tacarray):
         return tacarray.append(te)
@@ -185,3 +188,19 @@ class BinaryExpression(Expression):
         te = TacElem(op,left,right)
         return tacarray.append(te)
 
+
+class Variable(Expression):
+    def __init__(self, name, lineno = -1):
+        self.name = name
+        self.lineno = lineno
+
+    def __repr__(self):
+        return "<Variable: %s at line %d>" %(self.name, self.lineno)
+
+class Constant(Expression):
+    def __init__(self, value, lineno = -1):
+        self.value = value
+        self.lineno = lineno
+
+    def __repr__(self):
+        return "<Variable: %d at line %d>" %(self.value, self.lineno)