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added len function

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This commit is contained in:
Mark 2023-08-19 23:35:29 +02:00
parent ae0e163595
commit 2d79e75ba2
1 changed files with 27 additions and 3 deletions
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30
mers_lib/src/program/configs/with_base.rs
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@ -11,13 +11,37 @@ impl Config {
/// `deref: fn` clones the value from a reference
/// `eq: fn` returns true if all the values are equal, otherwise false.
/// `loop: fn` runs a function until it returns (T) instead of (), then returns T.
/// `len: fn` gets the length of strings or tuples
pub fn with_base(self) -> Self {
self.add_var(
"len".to_string(),
Data::new(data::function::Function {
info: Arc::new(Info::neverused()),
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(crate::program::run::CheckError(format!("cannot get length of {t} (must be a tuple or a string)")));
}
}
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 _))
} else if let Some(s) = a.get().as_any().downcast_ref::<data::string::String>() {
Data::new(data::int::Int(s.0.len() as _))
} else {
unreachable!("called len on {a:?}, which isn't a tuple or a string")
}
}),
}),
).add_var(
"loop".to_string(),
Data::new(data::function::Function {
info: Arc::new(Info::neverused()),
info_check: Arc::new(Mutex::new(CheckInfo::neverused())),
out: Arc::new(|a, i| {
out: Arc::new(|a, _i| {
let mut o = Type::empty();
for t in &a.types {
if let Some(t) = t.as_any().downcast_ref::<data::function::FunctionT>() {
@ -56,7 +80,7 @@ impl Config {
Data::new(data::function::Function {
info: Arc::new(Info::neverused()),
info_check: Arc::new(Mutex::new(CheckInfo::neverused())),
out: Arc::new(|a, i| {
out: Arc::new(|a, _i| {
for t in &a.types {
if t.iterable().is_none() {
return Err(crate::program::run::CheckError(format!("called eq on non-iterable")))
@ -89,7 +113,7 @@ impl Config {
Data::new(data::function::Function {
info: Arc::new(Info::neverused()),
info_check: Arc::new(Mutex::new(CheckInfo::neverused())),
out: Arc::new(|a, i| if let Some(v) = a.dereference() { Ok(v) } else { Err(crate::program::run::CheckError(format!("cannot dereference type {a}")))}),
out: Arc::new(|a, _i| if let Some(v) = a.dereference() { Ok(v) } else { Err(crate::program::run::CheckError(format!("cannot dereference type {a}")))}),
run: Arc::new(|a, _i| {
if let Some(r) = a
.get()