Implement function pointers.

This commit is contained in:
Stephen Chung
2020-06-25 18:07:57 +08:00
parent aeb47efce8
commit fe640e0e13
18 changed files with 269 additions and 31 deletions

View File

@@ -45,3 +45,44 @@ fn test_functions() -> Result<(), Box<EvalAltResult>> {
Ok(())
}
#[test]
fn test_function_pointers() -> Result<(), Box<EvalAltResult>> {
let engine = Engine::new();
assert_eq!(engine.eval::<String>(r#"type_of(Fn("abc"))"#)?, "Fn");
assert_eq!(
engine.eval::<INT>(
r#"
fn foo(x) { 40 + x }
let fn_name = "f";
fn_name += "oo";
let f = Fn(fn_name);
f.call(2)
"#
)?,
42
);
assert!(matches!(
*engine.eval::<INT>(r#"let f = Fn("abc"); f.call(0)"#).expect_err("should error"),
EvalAltResult::ErrorFunctionNotFound(f, _) if f.starts_with("abc (")
));
assert_eq!(
engine.eval::<INT>(
r#"
fn foo(x) { 40 + x }
let x = #{ action: Fn("foo") };
x.action.call(2)
"#
)?,
42
);
Ok(())
}