Rename catch_expr feature to try_blocks

Author: scottmcm

src/doc/unstable-book/src/language-features/catch-expr.md renamed to src/doc/unstable-book/src/language-features/try-blocks.md

@@ -1,18 +1,18 @@
-# `catch_expr`
+# `try_blocks`
 
 The tracking issue for this feature is: [#31436]
 
 [#31436]: https://github.com/rust-lang/rust/issues/31436
 
 ------------------------
 
-The `catch_expr` feature adds support for `try` blocks. A `try`
+The `try_blocks` feature adds support for `try` blocks. A `try`
 block creates a new scope one can use the `?` operator in.
 
 ```rust,ignore
 // This code needs the 2018 edition
 
-#![feature(catch_expr)]
+#![feature(try_blocks)]
 
 use std::num::ParseIntError;
 

src/librustc/lib.rs

@@ -65,7 +65,6 @@
 #![feature(trace_macros)]
 #![feature(trusted_len)]
 #![feature(vec_remove_item)]
-#![feature(catch_expr)]
 #![feature(step_trait)]
 #![feature(integer_atomics)]
 #![feature(test)]

src/libsyntax/feature_gate.rs

@@ -331,7 +331,7 @@ declare_features! (
     (active, abi_x86_interrupt, "1.17.0", Some(40180), None),
 
     // Allows the `try {...}` expression
-    (active, catch_expr, "1.17.0", Some(31436), None),
+    (active, try_blocks, "1.29.0", Some(31436), None),
 
     // Used to preserve symbols (see llvm.used)
     (active, used, "1.18.0", Some(40289), None),
@@ -1735,7 +1735,7 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
                                   "yield syntax is experimental");
             }
             ast::ExprKind::TryBlock(_) => {
-                gate_feature_post!(&self, catch_expr, e.span, "`try` expression is experimental");
+                gate_feature_post!(&self, try_blocks, e.span, "`try` expression is experimental");
             }
             ast::ExprKind::IfLet(ref pats, ..) | ast::ExprKind::WhileLet(ref pats, ..) => {
                 if pats.len() > 1 {

src/test/compile-fail/try-block-bad-lifetime.rs

@@ -10,7 +10,7 @@
 
 // compile-flags: --edition 2018
 
-#![feature(catch_expr)]
+#![feature(try_blocks)]
 
 // This test checks that borrows made and returned inside try blocks are properly constrained
 pub fn main() {

src/test/compile-fail/try-block-bad-type.rs

@@ -10,7 +10,7 @@
 
 // compile-flags: --edition 2018
 
-#![feature(catch_expr)]
+#![feature(try_blocks)]
 
 pub fn main() {
     let res: Result<u32, i32> = try {

src/test/compile-fail/try-block-in-match.rs

@@ -10,7 +10,7 @@
 
 // compile-flags: --edition 2018
 
-#![feature(catch_expr)]
+#![feature(try_blocks)]
 
 fn main() {
     match try { false } { _ => {} } //~ ERROR expected expression, found reserved keyword `try`

src/test/compile-fail/try-block-in-while.rs

@@ -10,7 +10,7 @@
 
 // compile-flags: --edition 2018
 
-#![feature(catch_expr)]
+#![feature(try_blocks)]
 
 fn main() {
     while try { false } {} //~ ERROR expected expression, found reserved keyword `try`

src/test/compile-fail/try-block-maybe-bad-lifetime.rs

@@ -10,7 +10,7 @@
 
 // compile-flags: --edition 2018
 
-#![feature(catch_expr)]
+#![feature(try_blocks)]
 
 // This test checks that borrows made and returned inside try blocks are properly constrained
 pub fn main() {

src/test/compile-fail/try-block-opt-init.rs

@@ -10,7 +10,7 @@
 
 // compile-flags: --edition 2018
 
-#![feature(catch_expr)]
+#![feature(try_blocks)]
 
 fn use_val<T: Sized>(_x: T) {}
 

src/test/run-pass/issue-45124.rs

@@ -10,7 +10,7 @@
 
 // compile-flags: --edition 2018
 
-#![feature(catch_expr)]
+#![feature(try_blocks)]
 
 fn main() {
     let mut a = 0;