feat: Implement while loops

examples/loops.fem

@@ -0,0 +1,5 @@
+counter is 0
+Otokonoko counter < 5 Femboycore
+    UwU Boy counter
+    counter is counter + 1
+Periodt

src/interpreter.py

@@ -75,3 +75,7 @@ class Interpreter:
             self.visit(node.if_block)
         elif node.else_block:
             self.visit(node.else_block)
+
+    def visit_WhileStatement(self, node):
+        while self.visit(node.condition):
+            self.visit(node.body)

src/lexer.py

@@ -90,6 +90,9 @@ class Lexer:
         if re.match(r'\bAndrogyny\b', self.text[self.pos:]):
             self.pos += len('Androgyny')
             return Token('ANDROGYNY', 'Androgyny')
+        if re.match(r'\bOtokonoko\b', self.text[self.pos:]):
+            self.pos += len('Otokonoko')
+            return Token('OTOKONOKO', 'Otokonoko')
         if re.match(r'\bis\b', self.text[self.pos:]):
             self.pos += 2
             return Token('ASSIGN', 'is')

src/parser.py

@@ -48,6 +48,11 @@ class IfStatement(AST):
         self.if_block = if_block
         self.else_block = else_block
 
+class WhileStatement(AST):
+    def __init__(self, condition, body):
+        self.condition = condition
+        self.body = body
+
 class Parser:
     def __init__(self, tokens):
         self.tokens = tokens
@@ -83,6 +88,9 @@ class Parser:
         if token.type == 'FEMBOY_FEMININE':
             return self.parse_if_statement()
 
+        if token.type == 'OTOKONOKO':
+            return self.parse_while_statement()
+
         raise Exception(f"Invalid statement starting with token {token.type}")
 
     def parse_print_statement(self):
@@ -135,6 +143,25 @@ class Parser:
 
         return IfStatement(condition, if_block, else_block)
 
+    def parse_while_statement(self):
+        self.get_next_token() # Consume OTOKONOKO
+
+        condition = self.expression()
+
+        if self.peek_next_token().type != 'FEMBOYCORE':
+            raise Exception("Expected 'Femboycore' to start while loop body")
+        self.get_next_token() # Consume FEMBOYCORE
+
+        body_statements = []
+        while self.peek_next_token().type != 'PERIODT':
+            if self.peek_next_token().type == 'EOF':
+                raise Exception("Unterminated while loop: Expected 'Periodt'")
+            body_statements.append(self.parse_statement())
+        self.get_next_token() # Consume PERIODT
+        body = Block(body_statements)
+
+        return WhileStatement(condition, body)
+
     def factor(self):
         token = self.get_next_token()
         if token.type == 'INTEGER':