added statements , functions,run

Classes/Constants.py

@@ -17,14 +17,46 @@
 
 TT_INT = 'INT'
 TT_FLOAT = 'FLOAT'
+TT_STRING = 'STRING'
+TT_IDENTIFIER = 'IDENTIFIER'
+TT_KEYWORD = 'KEYWORD'
 TT_PLUS = 'PLUS'
 TT_MINUS = 'MINUS'
 TT_MUL = 'MUL'
 TT_DIV = 'DIV'
 TT_POW = 'POW'
-TT_KEYWORD = 'KEYWORD'
-TT_IDENTIFIER = 'IDENTIFIER'
 TT_EQ = 'EQ'
 TT_LPAREN = 'LPAREN'
 TT_RPAREN = 'RPAREN'
-TT_EOF = 'EOF'
+TT_LSQUARE = 'LSQUARE'
+TT_RSQUARE = 'RSQUARE'
+TT_EE = 'EE'
+TT_NE = 'NE'
+TT_LT = 'LT'
+TT_GT = 'GT'
+TT_LTE = 'LTE'
+TT_GTE = 'GTE'
+TT_COMMA = 'COMMA'
+TT_ARROW = 'ARROW'
+TT_NEWLINE = 'NEWLINE'
+TT_EOF = 'EOF'
+
+KEYWORDS = [
+    'VAR',
+    'AND',
+    'OR',
+    'NOT',
+    'IF',
+    'ELIF',
+    'ELSE',
+    'FOR',
+    'TO',
+    'STEP',
+    'WHILE',
+    'FUN',
+    'THEN',
+    'END',
+    'RETURN',
+    'CONTINUE',
+    'BREAK',
+]

Classes/Error.py

@@ -1,51 +1,48 @@
-from error_line import *
+from Classes.error_line import *
+
 
 class Error:
     def __init__(self, pos_start, pos_end, error_name, details):
         self.pos_start = pos_start
         self.pos_end = pos_end
         self.error_name = error_name
         self.details = details
-
     def as_string(self):
-        result = f'{self.error_name}: {self.details}\n'
+        result  = f'{self.error_name}: {self.details}\n'
         result += f'File {self.pos_start.fn}, line {self.pos_start.ln + 1}'
-        result += '\n\n' + \
-            string_with_arrows(self.pos_start.ftxt,
-                               self.pos_start, self.pos_end)
+        result += '\n\n' + string_with_arrows(self.pos_start.ftxt, self.pos_start, self.pos_end)
         return result
 
-
 class IllegalCharError(Error):
     def __init__(self, pos_start, pos_end, details):
         super().__init__(pos_start, pos_end, 'Illegal Character', details)
 
+class ExpectedCharError(Error):
+    def __init__(self, pos_start, pos_end, details):
+        super().__init__(pos_start, pos_end, 'Expected Character', details)
 
 class InvalidSyntaxError(Error):
     def __init__(self, pos_start, pos_end, details=''):
         super().__init__(pos_start, pos_end, 'Invalid Syntax', details)
 
-
-class RunTimeError(Error):
+class RTError(Error):
     def __init__(self, pos_start, pos_end, details, context):
-        super().__init__(pos_start, pos_end, 'Run Time Error', details)
+        super().__init__(pos_start, pos_end, 'Runtime Error', details)
         self.context = context
 
     def as_string(self):
-        result = self.generate_traceback()
-        result += f'{self.error_name}: {self.details}\n'
-        result += \
-            string_with_arrows(self.pos_start.ftxt,
-                               self.pos_start, self.pos_end)
-
+        result  = self.generate_traceback()
+        result += f'{self.error_name}: {self.details}'
+        result += '\n\n' + string_with_arrows(self.pos_start.ftxt, self.pos_start, self.pos_end)
         return result
 
     def generate_traceback(self):
-        result = ""
+        result = ''
         pos = self.pos_start
         ctx = self.context
         while ctx:
-            result = f'File {pos.fn}, line {pos.ln + 1}, {ctx.display_name}\n' + result
+            result = f'  File {pos.fn}, line {str(pos.ln + 1)}, in {ctx.display_name}\n' + result
             pos = ctx.parent_entry_pos
             ctx = ctx.parent
-        return "Traceback recent calls: "+result
+
+        return 'Traceback (most recent call last):\n' + result