rohittp0 · aloshdenny · Nov 6, 2023
diff --git a/examples/exponent.not b/examples/exponent.not
@@ -0,0 +1,8 @@
+PRINT "Enter first number"
+INPUT a
+PRINT "Enter second number"
+INPUT b
+
+LET c = a**b
+
+PRINT c
diff --git a/language/__pycache__/constants.cpython-310.pyc b/language/__pycache__/constants.cpython-310.pyc
diff --git a/language/__pycache__/emitter.cpython-310.pyc b/language/__pycache__/emitter.cpython-310.pyc
diff --git a/language/__pycache__/lexer.cpython-310.pyc b/language/__pycache__/lexer.cpython-310.pyc
diff --git a/language/__pycache__/parser.cpython-310.pyc b/language/__pycache__/parser.cpython-310.pyc
diff --git a/language/constants.py b/language/constants.py
@@ -29,6 +29,7 @@ class TokenType(enum.Enum):
     GT = 210
     GTEQ = 211
     MODULO = 212
+    EXP = 213
     # Brackets.
     LPAREN = 301
     RPAREN = 302
@@ -40,4 +41,4 @@ class TokenType(enum.Enum):
 
 COMPARISON_TOKENS = [
     TokenType.EQEQ, TokenType.NOTEQ, TokenType.LT, TokenType.LTEQ, TokenType.GT, TokenType.GTEQ
-]
+]
diff --git a/language/errors/__pycache__/lexing_error.cpython-310.pyc b/language/errors/__pycache__/lexing_error.cpython-310.pyc
diff --git a/language/errors/__pycache__/parseing_error.cpython-310.pyc b/language/errors/__pycache__/parseing_error.cpython-310.pyc
diff --git a/language/lexer.py b/language/lexer.py
@@ -55,9 +55,17 @@ def parse_operators(self):
         elif self.curChar == '-':
             return(Token(self.curChar, TokenType.MINUS))
         elif self.curChar == '*':
-            return(Token(self.curChar, TokenType.ASTERISK))
+            # Check whether this token is * or **
+            if self.peek() == '*':
+                lastChar = self.curChar
+                self.next_char()
+                return (Token(lastChar + self.curChar, TokenType.EXP))
+            else:
+                return(Token(self.curChar, TokenType.ASTERISK))
         elif self.curChar == '/':
             return(Token(self.curChar, TokenType.SLASH))
+        elif self.curChar == '**':
+            return(Token(self.curChar, TokenType.EXP))
         elif self.curChar == '%':
             return(Token(self.curChar, TokenType.MODULO))
         elif self.curChar == '=':
@@ -155,6 +163,12 @@ def get_token(self) -> Token:
 
         token = (self.parse_special_symbols() or self.parse_operators() or
                  self.parse_literals() or self.parse_brackets())
+
+        if self.curChar == '*':
+            self.next_char()
+            if self.curChar == '*':
+                self.next_char()
+                return Token(TokenType.EXP, "**")
 
         if token is None:
             raise UnknownTokenError(self.curChar, self.curPos)

diff --git a/language/parser.py b/language/parser.py
@@ -74,15 +74,23 @@ def term(self):
         self.unary()
 
         while self.check_token(TokenType.ASTERISK) or self.check_token(TokenType.SLASH) or \
-                self.check_token(TokenType.MODULO):
+                self.check_token(TokenType.MODULO) or self.check_token(TokenType.EXP):
             self.emitter.emit(self.cur_token.text)
 
+            if self.check_token(TokenType.EXP):
+                self.emitter.emit("**")  # Use the ** operator for exponentiation
+            else:
+                self.emitter.emit(self.cur_token.text)
+                self.next_token()
+
             if self.check_token(TokenType.MODULO):
                 self.emitter.emit("(int)")
 
-            self.next_token()
             self.unary()
 
+        if self.check_token(TokenType.EXP):
+            self.emitter.emit(")")
+
     def expression(self):
         self.term()
         while self.check_token(TokenType.PLUS) or self.check_token(TokenType.MINUS):
@@ -220,4 +228,4 @@ def program(self):
         self.emitter.emit_line("return 0;")
         self.emitter.emit_line("}")
 
-        self.emitter.write_file()
+        self.emitter.write_file()