libsyntax: Make float literals not use @str

Author: pcwalton

src/librustc/middle/const_eval.rs

@@ -515,9 +515,9 @@ pub fn lit_to_const(lit: &Lit) -> const_val {
         LitInt(n, _) => const_int(n),
         LitUint(n, _) => const_uint(n),
         LitIntUnsuffixed(n) => const_int(n),
-        LitFloat(n, _) => const_float(from_str::<f64>(n).unwrap() as f64),
-        LitFloatUnsuffixed(n) =>
-            const_float(from_str::<f64>(n).unwrap() as f64),
+        LitFloat(ref n, _) | LitFloatUnsuffixed(ref n) => {
+            const_float(from_str::<f64>(n.get()).unwrap() as f64)
+        }
         LitNil => const_int(0i64),
         LitBool(b) => const_bool(b)
     }

src/librustc/middle/trans/consts.rs

@@ -57,12 +57,14 @@ pub fn const_lit(cx: &CrateContext, e: &ast::Expr, lit: ast::Lit)
                                 ty_to_str(cx.tcx, lit_int_ty)))
             }
         }
-        ast::LitFloat(fs, t) => C_floating(fs, Type::float_from_ty(t)),
-        ast::LitFloatUnsuffixed(fs) => {
+        ast::LitFloat(ref fs, t) => {
+            C_floating(fs.get(), Type::float_from_ty(t))
+        }
+        ast::LitFloatUnsuffixed(ref fs) => {
             let lit_float_ty = ty::node_id_to_type(cx.tcx, e.id);
             match ty::get(lit_float_ty).sty {
                 ty::ty_float(t) => {
-                    C_floating(fs, Type::float_from_ty(t))
+                    C_floating(fs.get(), Type::float_from_ty(t))
                 }
                 _ => {
                     cx.sess.span_bug(lit.span,

src/librustdoc/clean.rs

@@ -1152,8 +1152,8 @@ fn lit_to_str(lit: &ast::Lit) -> ~str {
         ast::LitInt(i, _t) => i.to_str(),
         ast::LitUint(u, _t) => u.to_str(),
         ast::LitIntUnsuffixed(i) => i.to_str(),
-        ast::LitFloat(f, _t) => f.to_str(),
-        ast::LitFloatUnsuffixed(f) => f.to_str(),
+        ast::LitFloat(ref f, _t) => f.get().to_str(),
+        ast::LitFloatUnsuffixed(ref f) => f.get().to_str(),
         ast::LitBool(b) => b.to_str(),
         ast::LitNil => ~"",
     }

src/libsyntax/ast.rs

@@ -728,8 +728,8 @@ pub enum Lit_ {
     LitInt(i64, IntTy),
     LitUint(u64, UintTy),
     LitIntUnsuffixed(i64),
-    LitFloat(@str, FloatTy),
-    LitFloatUnsuffixed(@str),
+    LitFloat(InternedString, FloatTy),
+    LitFloatUnsuffixed(InternedString),
     LitNil,
     LitBool(bool),
 }

src/libsyntax/ext/concat.rs

@@ -29,12 +29,11 @@ pub fn expand_syntax_ext(cx: &mut base::ExtCtxt,
         match e.node {
             ast::ExprLit(lit) => {
                 match lit.node {
-                    ast::LitStr(ref s, _) => {
+                    ast::LitStr(ref s, _) |
+                    ast::LitFloat(ref s, _) |
+                    ast::LitFloatUnsuffixed(ref s) => {
                         accumulator.push_str(s.get());
                     }
-                    ast::LitFloat(s, _) | ast::LitFloatUnsuffixed(s) => {
-                        accumulator.push_str(s);
-                    }
                     ast::LitChar(c) => {
                         accumulator.push_char(char::from_u32(c).unwrap());
                     }

src/libsyntax/parse/parser.rs

@@ -1405,9 +1405,12 @@ impl Parser {
             token::LIT_INT(i, it) => LitInt(i, it),
             token::LIT_UINT(u, ut) => LitUint(u, ut),
             token::LIT_INT_UNSUFFIXED(i) => LitIntUnsuffixed(i),
-            token::LIT_FLOAT(s, ft) => LitFloat(self.id_to_str(s), ft),
-            token::LIT_FLOAT_UNSUFFIXED(s) =>
-                LitFloatUnsuffixed(self.id_to_str(s)),
+            token::LIT_FLOAT(s, ft) => {
+                LitFloat(self.id_to_interned_str(s), ft)
+            }
+            token::LIT_FLOAT_UNSUFFIXED(s) => {
+                LitFloatUnsuffixed(self.id_to_interned_str(s))
+            }
             token::LIT_STR(s) => {
                 LitStr(self.id_to_interned_str(s), ast::CookedStr)
             }

src/libsyntax/print/pprust.rs

@@ -2202,10 +2202,10 @@ pub fn print_literal(s: &mut State, lit: &ast::Lit) {
             word(&mut s.s, (i as u64).to_str_radix(10u));
         }
       }
-      ast::LitFloat(f, t) => {
-        word(&mut s.s, f.to_owned() + ast_util::float_ty_to_str(t));
+      ast::LitFloat(ref f, t) => {
+        word(&mut s.s, f.get() + ast_util::float_ty_to_str(t));
       }
-      ast::LitFloatUnsuffixed(f) => word(&mut s.s, f),
+      ast::LitFloatUnsuffixed(ref f) => word(&mut s.s, f.get()),
       ast::LitNil => word(&mut s.s, "()"),
       ast::LitBool(val) => {
         if val { word(&mut s.s, "true"); } else { word(&mut s.s, "false"); }