From 84c6795ff8915c83002ad833ee6b74a9ea6982c8 Mon Sep 17 00:00:00 2001
From: CHatingPython <chatingpython@kpgpmc.org>
Date: Sat, 8 Aug 2026 00:04:04 +0200
Subject: [PATCH] feat(furc/parser): add if statement

---
 furc/include/furc/front/ast.hpp | 11 +++++++++++
 furc/src/front/parser.cpp       | 13 +++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/furc/include/furc/front/ast.hpp b/furc/include/furc/front/ast.hpp
index 3035d99..b13c39f 100644
--- a/furc/include/furc/front/ast.hpp
+++ b/furc/include/furc/front/ast.hpp
@@ -52,6 +52,7 @@ public:
         Expression,
 
         Compound,
+        If,
     };
 public:
     category_e category() const override { return ast_node_cat::Statement; }
@@ -65,6 +66,16 @@ struct comp_stmt_node final : public stmt_node {
     std::vector<stmt_node*> stmts;
 };
 
+class expr_node;
+
+struct if_stmt_node final : public stmt_node {
+    stmt_type_e stmt_type() const override { return If; }
+
+    expr_node* cond       = nullptr;
+    stmt_node* thenBranch = nullptr;
+    stmt_node* elseBranch = nullptr;
+};
+
 class decl_node : public stmt_node {
 public:
     enum decl_type_e {
diff --git a/furc/src/front/parser.cpp b/furc/src/front/parser.cpp
index db2badc..0756037 100644
--- a/furc/src/front/parser.cpp
+++ b/furc/src/front/parser.cpp
@@ -24,6 +24,19 @@ ast parser::parse() {
 stmt_node* parser::parse_stmt() {
     switch (m_lexer.peek_token().type) {
     case token::LBrace: return m_arena->allocate<comp_stmt_node>(parse_comp());
+    case token::If: {
+        m_lexer.next_token();
+        eat_token(token::LParen);
+        if_stmt_node node;
+        node.cond = parse_expr();
+        eat_token(token::RParen);
+        node.thenBranch = parse_stmt();
+        if (m_lexer.peek_token().type == token::Else) {
+            m_lexer.next_token();
+            node.elseBranch = parse_stmt();
+        }
+        return m_arena->allocate<if_stmt_node>(std::move(node));
+    }
     default: break;
     }