fixed reassignment, starting work on if statements

compiler.py

@@ -1,7 +1,7 @@
 from llvmlite import ir
 
 from AST import Node, NodeType, Program, Expression
-from AST import ExpressionStatement, AssignmentStatement, BlockStatement, ReturnStatement, FunctionStatement
+from AST import ExpressionStatement, AssignmentStatement, BlockStatement, ReturnStatement, FunctionStatement, ReassignStatement
 from AST import InfixExpression
 from AST import IntegerLiteral, FloatLiteral, IdentifierLiteral
 
@@ -23,6 +23,7 @@ class Compiler:
 		self.module: ir.Module = ir.Module("main")
 		self.builder: ir.IRBuilder = ir.IRBuilder()
 		self.environment: Environment = Environment()
+		self.errors: list[str] = []
 
 	def compile(self, node: Node) -> None:
 		match node.type():
@@ -40,6 +41,8 @@ class Compiler:
 				self.__visit_block_statement(node)
 			case NodeType.ReturnStatement:
 				self.__visit_return_statement(node)
+			case NodeType.ReassignStatement:
+				self.__visit_reassign_statement(node)
 
 			# Expressions
 			case NodeType.InfixExpression:
@@ -115,6 +118,17 @@ class Compiler:
 
 		self.builder = previous_builder
 
+	def __visit_reassign_statement(self, node: ReassignStatement) -> None:
+		name: str = node.ident.value
+		value: Expression = node.right_value
+
+		value, Type = self.__resolve_value(value)
+
+		if self.environment.lookup(name) is None:
+			self.errors.append(f"Identifier {name} has not been declared before it was re-assigned.")
+		else:
+			ptr, _ = self.environment.lookup(name)
+			self.builder.store(value, ptr)
 	# endregion	
 
 	# region Expressions