From f7e37ed345fac5d146ded6b1a222110018388be1 Mon Sep 17 00:00:00 2001
From: Shylock Hg <tcath2s@icloud.com>
Date: Thu, 30 Jan 2025 11:56:24 +0800
Subject: [PATCH] feat: add anonymous symbol.

---
 tigerc/src/ident_pool.rs | 2 ++
 tigerc/src/ir.rs         | 6 +++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/tigerc/src/ident_pool.rs b/tigerc/src/ident_pool.rs
index cb93773..90ed4f6 100644
--- a/tigerc/src/ident_pool.rs
+++ b/tigerc/src/ident_pool.rs
@@ -26,6 +26,8 @@ symbols! {
         TOK_LET: "let",
         TOK_IN: "in",
         TOK_END: "end",
+        // use for inner symbol
+        REVERSED_ANONYMOUS: "__anonymous",
     }
 }
 
diff --git a/tigerc/src/ir.rs b/tigerc/src/ir.rs
index 70eed6b..978cd34 100644
--- a/tigerc/src/ir.rs
+++ b/tigerc/src/ir.rs
@@ -1,6 +1,6 @@
 use std::hash::Hash;
 
-use crate::ident_pool::Symbol;
+use crate::ident_pool::{kw, Symbol};
 use crate::temp::{Label, Temp};
 
 // Identify different symbol with same name
@@ -24,6 +24,10 @@ impl LowerIdent {
             },
         }
     }
+
+    pub fn new_anonymous() -> LowerIdent {
+        LowerIdent::new(kw::REVERSED_ANONYMOUS)
+    }
 }
 
 impl PartialEq for LowerIdent {