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Refactor try/catch code.

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This commit is contained in:
Stephen Chung 2020-10-21 14:45:10 +08:00
parent ad60db5bae
commit 3660e42b96
1 changed files with 23 additions and 28 deletions
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41
src/engine.rs
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@ -1918,8 +1918,8 @@ impl Engine {
}
}
scope.rewind(scope.len() - 1);
state.scope_level -= 1;
scope.rewind(scope.len() - 1);
Ok(Default::default())
} else {
EvalAltResult::ErrorFor(x.1.position()).into()
@ -1940,52 +1940,47 @@ impl Engine {
.eval_stmt(scope, mods, state, lib, this_ptr, body, level)
.map(|_| ().into());
if let Err(err) = result {
match *err {
match result {
Ok(_) => result,
Err(err) => match *err {
mut err @ EvalAltResult::ErrorRuntime(_, _) | mut err
if err.catchable() =>
{
let value = match err {
EvalAltResult::ErrorRuntime(ref x, _) => x.clone(),
_ => {
let value = if let EvalAltResult::ErrorRuntime(ref x, _) = err {
x.clone()
} else {
err.set_position(Position::none());
err.to_string().into()
}
};
let has_var = if let Some((var_name, _)) = var_def {
let orig_scope_len = scope.len();
state.scope_level += 1;
if let Some((var_name, _)) = var_def {
let var_name = unsafe_cast_var_name_to_lifetime(var_name, &state);
scope.push(var_name, value);
state.scope_level += 1;
true
} else {
false
};
}
let mut result = self
.eval_stmt(scope, mods, state, lib, this_ptr, catch_body, level)
.map(|_| ().into());
if let Some(result_err) = result.as_ref().err() {
match result_err.as_ref() {
EvalAltResult::ErrorRuntime(x, pos) if x.is::<()>() => {
if let EvalAltResult::ErrorRuntime(Dynamic(Union::Unit(_)), pos) =
result_err.as_ref()
{
err.set_position(*pos);
result = Err(Box::new(err));
}
_ => (),
}
}
if has_var {
scope.rewind(scope.len() - 1);
state.scope_level -= 1;
}
scope.rewind(orig_scope_len);
result
}
_ => Err(err),
}
} else {
result
},
}
}