implemented if statement parsing

lc.c

@@ -151,7 +151,9 @@ void print_ast(ast_node *node, int depth) {
 			}
 			break;
 		case NODE_IF:
-			printf("IfStmt (Fields missing in struct)\n");
+			printf("If:\n");
+			print_ast(node->expr.whle.condition, depth + 1);
+			print_ast(node->expr.whle.body, depth + 1);
 			break;
 		case NODE_VAR_DECL:
 			printf("VarDecl: %.*s: %.*s\n", (int)node->expr.var_decl.name_len, node->expr.var_decl.name, (int)node->expr.var_decl.type_len, node->expr.var_decl.type);

parser.c

@@ -676,6 +676,17 @@ static ast_node *parse_while(parser *p)
 	return node;
 }
 
+static ast_node *parse_if(parser *p)
+{
+	ast_node *condition = parse_expression(p);
+	ast_node *body = parse_compound(p);
+	ast_node *node = arena_alloc(p->allocator, sizeof(ast_node));
+	node->type = NODE_IF;
+	node->expr.whle.body = body;
+	node->expr.whle.condition = condition;
+	return node;
+}
+
 static ast_node *parse_struct(parser *p);
 static member *parse_member(parser *p)
 {
@@ -874,6 +885,9 @@ static ast_node *parse_statement(parser *p)
 			return parse_while(p);
 		}
 	}
+	else if (match(p, TOKEN_IF)) {
+		return parse_if(p);
+	}
 	else if (match_peek(p, TOKEN_IDENTIFIER) && p->tokens->next && p->tokens->next->type == TOKEN_IDENTIFIER)
 	{
 		/* Variable declaration. */

test.c

@@ -1,4 +1,3 @@
-struct {
-	union { u32 x, u32 y } a,
-	u32 b,
+if a == x {
+	printf("hello");
 }