From 84c0d8638ebf766cc4f6e442bbd4f01c5810795a Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@mimiga.net>
Date: Mon, 21 Mar 2011 11:44:08 -0700
Subject: [PATCH] rustc: Update type serialization and deserialization for the
 "mutable?" change

---
 src/comp/front/creader.rs   | 20 +++++++++++++++-----
 src/comp/middle/metadata.rs | 20 +++++++++++++++-----
 2 files changed, 30 insertions(+), 10 deletions(-)

diff --git a/src/comp/front/creader.rs b/src/comp/front/creader.rs
index 89a19fc237b..8ef75e5460a 100644
--- a/src/comp/front/creader.rs
+++ b/src/comp/front/creader.rs
@@ -59,6 +59,16 @@ impure fn parse_ty(@pstate st, str_def sd) -> @ty.t {
              cname=option.none[str]);
 }
 
+impure fn parse_mt(@pstate st, str_def sd) -> ty.mt {
+    auto mut;
+    alt (peek(st)) {
+        case ('m') {next(st); mut = ast.mut;}
+        case ('?') {next(st); mut = ast.maybe_mut;}
+        case (_)   {mut=ast.imm;}
+    }
+    ret rec(ty=parse_ty(st, sd), mut=mut);
+}
+
 impure fn parse_sty(@pstate st, str_def sd) -> ty.sty {
     alt (next(st)) {
         case ('n') {ret ty.ty_nil;}
@@ -93,15 +103,15 @@ impure fn parse_sty(@pstate st, str_def sd) -> ty.sty {
             st.pos = st.pos + 1u;
             ret ty.ty_tag(sd(def), params);
         }      
-        case ('@') {ret ty.ty_box(parse_ty(st, sd));}
-        case ('V') {ret ty.ty_vec(parse_ty(st, sd));}
+        case ('@') {ret ty.ty_box(parse_mt(st, sd));}
+        case ('V') {ret ty.ty_vec(parse_mt(st, sd));}
         case ('P') {ret ty.ty_port(parse_ty(st, sd));}
         case ('C') {ret ty.ty_chan(parse_ty(st, sd));}
         case ('T') {
             check(next(st) == '[');
-            let vec[@ty.t] params = vec();
+            let vec[ty.mt] params = vec();
             while (peek(st) != ']') {
-                params = _vec.push[@ty.t](params, parse_ty(st, sd));
+                params = _vec.push[ty.mt](params, parse_mt(st, sd));
             }
             st.pos = st.pos + 1u;
             ret ty.ty_tup(params);
@@ -114,7 +124,7 @@ impure fn parse_sty(@pstate st, str_def sd) -> ty.sty {
                 while (peek(st) != '=') {name += _str.from_char(next(st));}
                 st.pos = st.pos + 1u;
                 fields = _vec.push[ty.field]
-                    (fields, rec(ident=name, ty=parse_ty(st, sd)));
+                    (fields, rec(ident=name, mt=parse_mt(st, sd)));
             }
             st.pos = st.pos + 1u;
             ret ty.ty_rec(fields);
diff --git a/src/comp/middle/metadata.rs b/src/comp/middle/metadata.rs
index bff0ac94e19..06b527de89e 100644
--- a/src/comp/middle/metadata.rs
+++ b/src/comp/middle/metadata.rs
@@ -26,6 +26,16 @@ fn ty_str(@ty.t t, def_str ds) -> str {
     ret sty_str(t.struct, ds);
 }
 
+fn mt_str(&ty.mt mt, def_str ds) -> str {
+    auto mut_str;
+    alt (mt.mut) {
+        case (ast.imm)       { mut_str = "";  }
+        case (ast.mut)       { mut_str = "m"; }
+        case (ast.maybe_mut) { mut_str = "?"; }
+    }
+    ret mut_str + ty_str(mt.ty, ds);
+}
+
 fn sty_str(ty.sty st, def_str ds) -> str {
     alt (st) {
         case (ty.ty_nil) {ret "n";}
@@ -53,20 +63,20 @@ fn sty_str(ty.sty st, def_str ds) -> str {
             for (@ty.t t in tys) {acc += ty_str(t, ds);}
             ret acc + "]";
         }
-        case (ty.ty_box(?t)) {ret "@" + ty_str(t, ds);}
-        case (ty.ty_vec(?t)) {ret "V" + ty_str(t, ds);}
+        case (ty.ty_box(?mt)) {ret "@" + mt_str(mt, ds);}
+        case (ty.ty_vec(?mt)) {ret "V" + mt_str(mt, ds);}
         case (ty.ty_port(?t)) {ret "P" + ty_str(t, ds);}
         case (ty.ty_chan(?t)) {ret "C" + ty_str(t, ds);}
-        case (ty.ty_tup(?tys)) {
+        case (ty.ty_tup(?mts)) {
             auto acc = "T[";
-            for (@ty.t t in tys) {acc += ty_str(t, ds);}
+            for (ty.mt mt in mts) {acc += mt_str(mt, ds);}
             ret acc + "]";
         }
         case (ty.ty_rec(?fields)) {
             auto acc = "R[";
             for (ty.field field in fields) {
                 acc += field.ident + "=";
-                acc += ty_str(field.ty, ds);
+                acc += mt_str(field.mt, ds);
             }
             ret acc + "]";
         }