panic-calm

Cargo.lock

@@ -874,6 +874,10 @@ version = "11.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
 
+[[package]]
+name = "panic-calm"
+version = "0.1.0"
+
 [[package]]
 name = "peg"
 version = "0.6.3"

Cargo.toml

@@ -3,6 +3,7 @@ members = [
   ".",
   "members/criterion-demo",
   "members/cucumber-demo",
+  "members/panic-calm",
   "members/revsqrt",
   "members/serde-json-demo",
   "members/slog-demo",
@@ -14,6 +15,7 @@ default-members = [
   "members/serde-json-demo",
   "members/slog-demo",
   "members/cucumber-demo",
+  "members/panic-calm",
 ]
 
 [package]

members/panic-calm/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "panic-calm"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

members/panic-calm/src/main.rs

@@ -0,0 +1,27 @@
+use std::{io::Write, panic};
+fn inner() {
+    let mut counter = 0u8;
+    loop {
+        // will eventually panic when overflowing?
+        counter += 1;
+        print!("{counter}\t");
+        if counter % 8 == 0 { println!() }
+        if counter == 255 {
+            // so panic will look fancier :)
+            println!()
+        }
+    }
+}
+
+fn main() {
+    // will not catch all panics, only ones that unwind
+    let panic = panic::catch_unwind(|| {
+        inner();
+    });
+    if panic.is_err() {
+        dbg!(&panic);
+        dbg!(&panic.as_ref().unwrap_err().type_id());
+        println!("recovered from a panic");
+    }
+    else {println!("no panic on the titanic")}
+}