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Basic type inference and solving for abilities

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Note that is still pretty limited. We only permit opaque types to
implement abilities, abilities cannot have type arguments, and also no
other functions may depend on abilities
This commit is contained in:
Ayaz Hafiz 2022-04-12 15:37:16 -04:00
parent 913d97cab1
commit 15a040ec87
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GPG key ID: 0E2A37416A25EF58
25 changed files with 1808 additions and 477 deletions
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19
compiler/constrain/src/module.rs
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@ -1,4 +1,5 @@
use roc_builtins::std::StdLib;
use roc_can::abilities::AbilitiesStore;
use roc_can::constraint::{Constraint, Constraints};
use roc_can::def::Declaration;
use roc_collections::all::MutMap;
@ -100,10 +101,26 @@ pub enum ExposedModuleTypes {
pub fn constrain_module(
constraints: &mut Constraints,
abilities_store: &AbilitiesStore,
declarations: &[Declaration],
home: ModuleId,
) -> Constraint {
crate::expr::constrain_decls(constraints, home, declarations)
let mut constraint = crate::expr::constrain_decls(constraints, home, declarations);
for (member_name, member_data) in abilities_store.root_ability_members().iter() {
constraint = constraints.let_constraint(
[],
[],
[(*member_name, Loc::at_zero(member_data.signature.clone()))],
Constraint::True,
constraint,
);
}
// The module constraint should always save the environment at the end.
debug_assert!(constraints.contains_save_the_environment(&constraint));
constraint
}
#[derive(Debug, Clone)]