Emphasize custom syntax are expressions.

2020-12-17 10:42:20 +08:00
parent 95b8dcc623
commit fc54fdc907
2 changed files with 29 additions and 2 deletions
--- a/tests/syntax.rs
+++ b/tests/syntax.rs
@@ -29,8 +29,11 @@ fn test_custom_syntax() -> Result<(), Box<EvalAltResult>> {

            context.scope_mut().push(var_name, 0 as INT);

+            let mut count: INT = 0;
+
            loop {
                context.eval_expression_tree(stmt)?;
+                count += 1;

                let stop = !context
                    .eval_expression_tree(condition)?
@@ -48,10 +51,20 @@ fn test_custom_syntax() -> Result<(), Box<EvalAltResult>> {
                }
            }

-            Ok(Dynamic::UNIT)
+            Ok(count.into())
        },
    )?;

+    assert_eq!(
+        engine.eval::<INT>(
+            r"
+                let x = 0;
+                let foo = (exec |x| -> { x += 2 } while x < 42) * 10;
+                foo
+            "
+        )?,
+        210
+    );
    assert_eq!(
        engine.eval::<INT>(
            r"