A bunch of array fixes and some buffer stuff that doesn't quite work yet

Parsing.jai

@@ -1368,8 +1368,35 @@ function_declaration :: (parse_state : *Parse_State, identifier_token : *Token,
 }
 
 buffer :: (state : *Parse_State, identifier_token : *Token = null) -> *AST_Node {
-	internal_error_message(*state.ctx.messages, "Buffers are not yet implemented in the language.", state.ctx.file.path);
-	return null;
+	node : *AST_Node = make_node(state, .Buffer);
+	source_location : Source_Range;
+	source_location.begin = state.current;
+
+	if check(state, .TOKEN_AT) {
+		while check(state, .TOKEN_AT) {
+			advance(state);
+			// @Incomplete(niels): this is a mapping
+			if check(state, .TOKEN_IDENTIFIER) {
+				array_add(*node.hint_tokens, state.current);
+				advance(state);
+			}
+		}
+	}
+	
+	consume(state, .TOKEN_LEFTBRACE, "Expect '{' after 'buffer' keyword");
+	buffer := field_list(state, .Semicolon);
+	node.array_field = true;
+
+	if identifier_token {
+		node.name = identifier_token.ident_value;
+	}
+	add_child(node, buffer);
+	
+	consume(state, .TOKEN_RIGHTBRACE, "Expect '}' after 'buffer' block");
+	source_location.end = state.previous;
+	node.source_location = source_location;
+
+	return node;
 }
 
 constant_buffer :: (parse_state : *Parse_State, identifier_token : *Token = null) -> *AST_Node {
@@ -1484,7 +1511,7 @@ declaration :: (parse_state : *Parse_State) -> *AST_Node {
 		error := error_node(parse_state, tprint("Expected a declaration or function call. '%' not allowed as a declaration name.", parse_state.current.kind));
 		advance(parse_state);
 		decl_node = error;
-	}
+	} 
 
 	if !decl_node && !skip_statement {
 		decl_node = statement(parse_state);