Test example rune scripts on CI

Fixes some of the scripts along the way.
The one `_error.rn` file was moved to a new directory `compile-fail` to
indicate that the failure is expected.

.github/workflows/build.yml

@@ -21,4 +21,7 @@ jobs:
             ~/.cargo/bin
             target
           key: ${{ runner.os }}-cargo-${{ steps.rust_toolchain.outputs.rustc_hash }}
-      - run: cargo test --all
+      - name: Run tests
+        run: cargo test --all
+      - name: Execute example scripts
+        run: cargo run --bin rune --release -- --experimental -O macros=true scripts/*.rn

scripts/experimental_macro_error.rn → scripts/compile-fail/experimental_macro_error.rn

@@ -8,4 +8,3 @@ fn main() {
         doit a
     };
 }
-

scripts/fib.rn

@@ -7,5 +7,5 @@ fn fib(n) {
 }
 
 fn main() {
-    fib(30)
+    fib(15)
 }

scripts/folding.rn

@@ -5,5 +5,5 @@ fn main() {
     "hello world";
     'a';
     [42, 42];
-    {"foo": 42, "bar": [1, 2, 3, 4]};
+    #{"foo": 42, "bar": [1, 2, 3, 4]};
 }

scripts/objects.rn

@@ -3,6 +3,6 @@ fn main() {
     object["bar"] = object["foo"] + 1;
     object = #{"foo": 1};
     let object = #{"bar": 2};
-    let a = object["foo"];
+    let a = object.get("foo");
     object
 }

scripts/strings.rn

@@ -3,7 +3,7 @@ use string;
 fn main() {
     let a = "foo";
 
-    let s = string::with_capacity(42);
+    let s = String::with_capacity(42);
     s.push_str(a);
     s.push('/');
     s.push_str("bar");