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use std::{collections::HashMap, sync::Arc};
use crate::{
data::{self, object::ObjectT, reference::ReferenceT, Data, Type},
errors::{CheckError, EColor, SourceRange},
};
use super::MersStatement;
#[derive(Debug)]
pub struct Object {
pub pos_in_src: SourceRange,
pub fields: Vec<(usize, Box<dyn MersStatement>)>,
}
impl MersStatement for Object {
fn check_custom(
&self,
info: &mut super::CheckInfo,
init_to: Option<&Type>,
) -> Result<data::Type, super::CheckError> {
let mut init_to_is_empty_type = false;
let mut init_fields = if let Some(init_to) = init_to {
init_to_is_empty_type = init_to.types.is_empty();
let print_is_part_of = init_to.types.len() > 1;
let mut init_fields = HashMap::new();
for (t, init_to_ref) in init_to
.types
.iter()
.filter_map(|t| t.as_any().downcast_ref::<ReferenceT>())
.flat_map(|r| r.0.types.iter().map(|t| (t, true)))
.chain(
init_to
.types
.iter()
.filter(|t| !t.as_any().is::<ReferenceT>())
.map(|t| (t, false)),
)
{
if let Some(ot) = t.as_any().downcast_ref::<ObjectT>() {
let mut fields = self.fields.iter().map(|(t, _)| *t).collect::<Vec<_>>();
fields.sort();
for (field, t) in ot.iter() {
if let Ok(i) = fields.binary_search(field) {
fields.remove(i);
}
let init_fields = init_fields.entry(*field).or_insert_with(Type::empty);
if init_to_ref {
init_fields.add(Arc::new(ReferenceT(t.clone())));
} else {
init_fields.add_all(t);
}
}
if !fields.is_empty() {
return Err(CheckError::new().msg(vec![
("can't init an ".to_owned(), None),
("object".to_owned(), Some(EColor::InitTo)),
(" from type ".to_owned(), None),
(t.simplified_as_string(info), Some(EColor::InitFrom)),
if print_is_part_of {
(", which is part of ".to_owned(), None)
} else {
(format!(""), None)
},
if print_is_part_of {
(init_to.simplified_as_string(info), Some(EColor::InitFrom))
} else {
(format!(""), None)
},
(
format!(" - missing fields {}", {
let object_fields_rev =
info.global.object_fields_rev.lock().unwrap();
fields
.iter()
.map(|f| {
object_fields_rev
.get(*f)
.map(|f| f.as_str())
.unwrap_or("<unknown>")
})
.enumerate()
.map(|(i, f)| {
if i == 0 {
f.to_owned()
} else {
format!(", {f}")
}
})
.collect::<String>()
}),
None,
),
]));
}
} else {
return Err(CheckError::new().msg(vec![
("can't init an ".to_owned(), None),
("object".to_owned(), Some(EColor::InitTo)),
(" from type ".to_owned(), None),
(t.simplified_as_string(info), Some(EColor::InitFrom)),
if print_is_part_of {
(", which is part of ".to_owned(), None)
} else {
(format!(""), None)
},
if print_is_part_of {
(init_to.simplified_as_string(info), Some(EColor::InitFrom))
} else {
(format!(""), None)
},
(
" - only objects can be assigned to objects".to_owned(),
None,
),
]));
}
}
Some(init_fields)
} else {
None
};
Ok(Type::new(data::object::ObjectT::new(
self.fields
.iter()
.map(|(field, v)| -> Result<_, CheckError> {
Ok((
*field,
v.check(
info,
if let Some(f) = &mut init_fields {
Some(if let Some(s) = f.remove(field) {
s
} else if init_to_is_empty_type {
Type::empty()
} else {
unreachable!("type-checking earlier in check_custom() should prevent this")
})
} else {
None
}
.as_ref(),
)?,
))
})
.collect::<Result<_, _>>()?,
)))
}
fn run_custom(&self, info: &mut super::Info) -> Result<Data, CheckError> {
Ok(Data::new(data::object::Object::new(
self.fields
.iter()
.map(|(n, s)| Ok::<_, CheckError>((n.clone(), s.run(info)?)))
.collect::<Result<Vec<_>, _>>()?,
)))
}
fn has_scope(&self) -> bool {
false
}
fn source_range(&self) -> SourceRange {
self.pos_in_src.clone()
}
fn inner_statements(&self) -> Vec<&dyn MersStatement> {
self.fields.iter().map(|(_, s)| s.as_ref()).collect()
}
fn as_any(&self) -> &dyn std::any::Any {
self
}
}