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len function now works on lists because it works on all iterators

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This commit is contained in:
Mark 2023-10-27 14:22:14 +02:00
parent e60714e020
commit 1384222b59
1 changed files with 9 additions and 6 deletions
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15
mers_lib/src/program/configs/with_base.rs
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@ -127,20 +127,23 @@ impl Config {
info_check: Arc::new(Mutex::new(CheckInfo::neverused())),
out: Arc::new(|a, _i| {
for t in &a.types {
if t.as_any().downcast_ref::<data::string::StringT>().is_none() && t.as_any().downcast_ref::<data::tuple::TupleT>().is_none() {
return Err(format!("cannot get length of {t} (must be a tuple or a string)").into());
if t.as_any().downcast_ref::<data::string::StringT>().is_none() && t.as_any().downcast_ref::<data::tuple::TupleT>().is_none() && t.iterable().is_none() {
return Err(format!("cannot get length of {t} (must be a tuple, string or iterable)").into());
}
}
Ok(Type::new(data::int::IntT))
}),
run: Arc::new(|a, _i| {
if let Some(t) = a.get().as_any().downcast_ref::<data::tuple::Tuple>() {
Data::new(data::int::Int(t.0.len() as _))
Data::new(data::int::Int(if let Some(t) = a.get().as_any().downcast_ref::<data::tuple::Tuple>() {
t.0.len() as _
} else if let Some(s) = a.get().as_any().downcast_ref::<data::string::String>() {
Data::new(data::int::Int(s.0.len() as _))
s.0.len() as _
} else if let Some(i) = a.get().iterable() {
// -1 if more elements than isize can represent
i.take(isize::MAX as usize + 1).count() as isize
} else {
unreachable!("called len on {a:?}, which isn't a tuple or a string")
}
}))
}),
}),
).add_var(