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Enable modifying constant shared values.

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This commit is contained in:
Stephen Chung
2022-06-26 17:04:08 +08:00
parent 7068775f19
commit 335957fbc2
4 changed files with 46 additions and 11 deletions
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23
tests/var_scope.rs
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@@ -1,4 +1,4 @@
use rhai::{Engine, EvalAltResult, ParseErrorType, Position, Scope, INT};
use rhai::{Dynamic, Engine, EvalAltResult, ParseErrorType, Position, Scope, INT};
#[test]
fn test_var_scope() -> Result<(), Box<EvalAltResult>> {
@@ -162,9 +162,16 @@ fn test_var_resolver() -> Result<(), Box<EvalAltResult>> {
scope.push("chameleon", 123 as INT);
scope.push("DO_NOT_USE", 999 as INT);
engine.on_var(|name, _, context| {
#[cfg(not(feature = "no_closure"))]
let mut base = Dynamic::ONE.into_shared();
#[cfg(not(feature = "no_closure"))]
let shared = base.clone();
engine.on_var(move |name, _, context| {
match name {
"MYSTIC_NUMBER" => Ok(Some((42 as INT).into())),
#[cfg(not(feature = "no_closure"))]
"HELLO" => Ok(Some(shared.clone())),
// Override a variable - make it not found even if it exists!
"DO_NOT_USE" => {
Err(EvalAltResult::ErrorVariableNotFound(name.to_string(), Position::NONE).into())
@@ -186,6 +193,18 @@ fn test_var_resolver() -> Result<(), Box<EvalAltResult>> {
engine.eval_with_scope::<INT>(&mut scope, "MYSTIC_NUMBER")?,
42
);
#[cfg(not(feature = "no_closure"))]
{
assert_eq!(engine.eval_with_scope::<INT>(&mut scope, "HELLO")?, 1);
*base.write_lock::<INT>().unwrap() = 42;
assert_eq!(engine.eval_with_scope::<INT>(&mut scope, "HELLO")?, 42);
assert_eq!(
engine.eval_with_scope::<INT>(&mut scope, "HELLO = HELLO * 2; HELLO")?,
84
);
}
assert_eq!(engine.eval_with_scope::<INT>(&mut scope, "chameleon")?, 1);
assert!(
matches!(*engine.eval_with_scope::<INT>(&mut scope, "DO_NOT_USE").expect_err("should error"),