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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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14
compiler/can/src/module.rs
View file

@ -1,3 +1,4 @@
use crate::abilities::AbilitiesStore;
use crate::def::{canonicalize_defs, sort_can_defs, Declaration, Def};
use crate::effect_module::HostedGeneratedFunctions;
use crate::env::Env;
@ -28,11 +29,13 @@ pub struct Module {
/// all aliases. `bool` indicates whether it is exposed
pub aliases: MutMap<Symbol, (bool, Alias)>,
pub rigid_variables: RigidVariables,
pub abilities_store: AbilitiesStore,
}
#[derive(Debug, Default)]
pub struct RigidVariables {
pub named: MutMap<Variable, Lowercase>,
pub able: MutMap<Variable, (Lowercase, Symbol)>,
pub wildcards: MutSet<Variable>,
}
@ -250,6 +253,7 @@ pub fn canonicalize_module_defs<'a>(
if !output.references.has_value_lookup(symbol)
&& !output.references.has_type_lookup(symbol)
&& !exposed_symbols.contains(&symbol)
&& !scope.abilities_store.is_specialization_name(symbol)
{
env.problem(Problem::UnusedDef(symbol, region));
}
@ -259,6 +263,12 @@ pub fn canonicalize_module_defs<'a>(
rigid_variables.named.insert(named.variable, named.name);
}
for able in output.introduced_variables.able {
rigid_variables
.able
.insert(able.variable, (able.name, able.ability));
}
for var in output.introduced_variables.wildcards {
rigid_variables.wildcards.insert(var.value);
}
@ -444,6 +454,10 @@ pub fn canonicalize_module_defs<'a>(
aliases.insert(symbol, alias);
}
for member in scope.abilities_store.root_ability_members().keys() {
exposed_but_not_defined.remove(member);
}
// By this point, all exposed symbols should have been removed from
// exposed_symbols and added to exposed_vars_by_symbol. If any were
// not, that means they were declared as exposed but there was