Update Rust code to the current Rust nightly

Lots of changes! Hopefully everything is still semantically equivalent (tests
still pass)

1 files changed, 3 insertions, 3 deletions

diff --git a/rust/src/printer.rs b/rust/src/printer.rs
index f46b66c..591822b 100644
--- a/rust/src/printer.rs
+++ b/rust/src/printer.rs
@@ -3,7 +3,7 @@ use types::MalVal;
 pub fn escape_str(s: &str) -> String {
     let mut escaped = String::new();
     escaped.push('"');
-    for c in s.as_slice().chars() {
+    for c in s.chars() {
         let _ = match c {
           '"' => escaped.push_str("\\\""),
           '\\' => escaped.push_str("\\\\"),
@@ -24,7 +24,7 @@ pub fn escape_str(s: &str) -> String {
 pub fn unescape_str(s: &str) -> String {
     let re1 = regex!(r#"\\""#);
     let re2 = regex!(r#"\n"#);
-    re2.replace_all(re1.replace_all(s.as_slice(), "\"").as_slice(), "\n")
+    re2.replace_all(&re1.replace_all(&s, "\""), "\n")
 }
 
 pub fn pr_list(lst: &Vec<MalVal>, pr: bool,
@@ -38,7 +38,7 @@ pub fn pr_list(lst: &Vec<MalVal>, pr: bool,
         } else {
             res.push_str(join);
         }
-        res.push_str(mv.pr_str(pr).as_slice());
+        res.push_str(&mv.pr_str(pr));
     }
     res.push_str(end);
     res