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Allow engine to retain functions across runs.

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This commit is contained in:
Stephen Chung
2020-03-10 09:30:12 +08:00
parent 55e7af7b04
commit bae9946291
7 changed files with 101 additions and 61 deletions
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25
tests/var_scope.rs
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@@ -5,12 +5,15 @@ fn test_var_scope() -> Result<(), EvalAltResult> {
let mut engine = Engine::new();
let mut scope = Scope::new();
engine.eval_with_scope::<()>(&mut scope, "let x = 4 + 5")?;
assert_eq!(engine.eval_with_scope::<i64>(&mut scope, "x")?, 9);
engine.eval_with_scope::<()>(&mut scope, "x = x + 1; x = x + 2;")?;
assert_eq!(engine.eval_with_scope::<i64>(&mut scope, "x")?, 12);
assert_eq!(engine.eval_with_scope::<()>(&mut scope, "{let x = 3}")?, ());
assert_eq!(engine.eval_with_scope::<i64>(&mut scope, "x")?, 12);
engine.eval_with_scope::<()>(&mut scope, false, "let x = 4 + 5")?;
assert_eq!(engine.eval_with_scope::<i64>(&mut scope, false, "x")?, 9);
engine.eval_with_scope::<()>(&mut scope, false, "x = x + 1; x = x + 2;")?;
assert_eq!(engine.eval_with_scope::<i64>(&mut scope, false, "x")?, 12);
assert_eq!(
engine.eval_with_scope::<()>(&mut scope, false, "{let x = 3}")?,
()
);
assert_eq!(engine.eval_with_scope::<i64>(&mut scope, false, "x")?, 12);
Ok(())
}
@@ -30,17 +33,11 @@ fn test_scope_eval() -> Result<(), EvalAltResult> {
// First invocation
engine
.eval_with_scope::<()>(
&mut scope,
r"
let x = 4 + 5 - y + z;
y = 1;
",
)
.eval_with_scope::<()>(&mut scope, false, " let x = 4 + 5 - y + z; y = 1;")
.expect("y and z not found?");
// Second invocation using the same state
let result = engine.eval_with_scope::<i64>(&mut scope, "x")?;
let result = engine.eval_with_scope::<i64>(&mut scope, false, "x")?;
println!("result: {}", result); // should print 966