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use sway_types::{Named, Spanned};
use crate::{
decl_engine::{DeclEngineInsert, DeclRef, ReplaceFunctionImplementingType},
error::*,
language::{parsed, ty},
semantic_analysis::TypeCheckContext,
type_system::*,
CompileResult,
};
impl ty::TyDecl {
pub(crate) fn type_check(
mut ctx: TypeCheckContext,
decl: parsed::Declaration,
) -> CompileResult<ty::TyDecl> {
let mut warnings = vec![];
let mut errors = vec![];
let type_engine = ctx.type_engine;
let decl_engine = ctx.decl_engine;
let engines = ctx.engines();
let decl = match decl {
parsed::Declaration::VariableDeclaration(parsed::VariableDeclaration {
name,
mut type_ascription,
body,
is_mutable,
}) => {
type_ascription.type_id = check!(
ctx.resolve_type_with_self(
type_ascription.type_id,
&type_ascription.span,
EnforceTypeArguments::Yes,
None
),
type_engine.insert(decl_engine, TypeInfo::ErrorRecovery),
warnings,
errors
);
let mut ctx = ctx
.with_type_annotation(type_ascription.type_id)
.with_help_text(
"Variable declaration's type annotation does not match up \
with the assigned expression's type.",
);
let result = ty::TyExpression::type_check(ctx.by_ref(), body);
let body = check!(
result,
ty::TyExpression::error(name.span(), engines),
warnings,
errors
);
// Integers are special in the sense that we can't only rely on the type of `body`
// to get the type of the variable. The type of the variable *has* to follow
// `type_ascription` if `type_ascription` is a concrete integer type that does not
// conflict with the type of `body` (i.e. passes the type checking above).
let return_type = match type_engine.get(type_ascription.type_id) {
TypeInfo::UnsignedInteger(_) => type_ascription.type_id,
_ => body.return_type,
};
let typed_var_decl = ty::TyDecl::VariableDecl(Box::new(ty::TyVariableDecl {
name: name.clone(),
body,
mutability: ty::VariableMutability::new_from_ref_mut(false, is_mutable),
return_type,
type_ascription,
}));
check!(
ctx.namespace.insert_symbol(name, typed_var_decl.clone()),
return err(warnings, errors),
warnings,
errors
);
typed_var_decl
}
parsed::Declaration::ConstantDeclaration(decl) => {
let span = decl.span.clone();
let const_decl = check!(
ty::TyConstantDecl::type_check(ctx.by_ref(), decl),
return ok(ty::TyDecl::ErrorRecovery(span), warnings, errors),
warnings,
errors
);
let typed_const_decl: ty::TyDecl = decl_engine.insert(const_decl.clone()).into();
check!(
ctx.namespace
.insert_symbol(const_decl.name().clone(), typed_const_decl.clone()),
return err(warnings, errors),
warnings,
errors
);
typed_const_decl
}
parsed::Declaration::EnumDeclaration(decl) => {
let span = decl.span.clone();
let enum_decl = check!(
ty::TyEnumDecl::type_check(ctx.by_ref(), decl),
return ok(ty::TyDecl::ErrorRecovery(span), warnings, errors),
warnings,
errors
);
let call_path = enum_decl.call_path.clone();
let decl: ty::TyDecl = decl_engine.insert(enum_decl).into();
check!(
ctx.namespace.insert_symbol(call_path.suffix, decl.clone()),
return err(warnings, errors),
warnings,
errors
);
decl
}
parsed::Declaration::FunctionDeclaration(fn_decl) => {
let span = fn_decl.span.clone();
let mut ctx =
ctx.with_type_annotation(type_engine.insert(decl_engine, TypeInfo::Unknown));
let fn_decl = check!(
ty::TyFunctionDecl::type_check(ctx.by_ref(), fn_decl, false, false),
return ok(ty::TyDecl::ErrorRecovery(span), warnings, errors),
warnings,
errors
);
let name = fn_decl.name.clone();
let decl: ty::TyDecl = decl_engine.insert(fn_decl).into();
ctx.namespace.insert_symbol(name, decl.clone());
decl
}
parsed::Declaration::TraitDeclaration(trait_decl) => {
let span = trait_decl.span.clone();
let mut trait_decl = check!(
ty::TyTraitDecl::type_check(ctx.by_ref(), trait_decl),
return ok(ty::TyDecl::ErrorRecovery(span), warnings, errors),
warnings,
errors
);
let name = trait_decl.name.clone();
// save decl_refs for the LSP
for supertrait in trait_decl.supertraits.iter_mut() {
ctx.namespace
.resolve_call_path(&supertrait.name)
.cloned()
.map(|supertrait_decl| {
if let ty::TyDecl::TraitDecl {
name: supertrait_name,
decl_id: supertrait_decl_id,
subst_list: _,
decl_span: supertrait_decl_span,
} = supertrait_decl
{
supertrait.decl_ref = Some(DeclRef::new(
supertrait_name,
supertrait_decl_id,
supertrait_decl_span,
));
}
});
}
let decl: ty::TyDecl = decl_engine.insert(trait_decl.clone()).into();
trait_decl
.items
.iter_mut()
.for_each(|item| item.replace_implementing_type(engines, decl.clone()));
check!(
ctx.namespace.insert_symbol(name, decl.clone()),
return err(warnings, errors),
warnings,
errors
);
decl
}
parsed::Declaration::ImplTrait(impl_trait) => {
let span = impl_trait.block_span.clone();
let mut impl_trait = check!(
ty::TyImplTrait::type_check_impl_trait(ctx.by_ref(), impl_trait),
return ok(ty::TyDecl::ErrorRecovery(span), warnings, errors),
warnings,
errors
);
check!(
ctx.namespace.insert_trait_implementation(
impl_trait.trait_name.clone(),
impl_trait.trait_type_arguments.clone(),
impl_trait.implementing_for.type_id,
&impl_trait.items,
&impl_trait.span,
false,
engines,
),
return err(warnings, errors),
warnings,
errors
);
let impl_trait_decl: ty::TyDecl = decl_engine.insert(impl_trait.clone()).into();
impl_trait.items.iter_mut().for_each(|item| {
item.replace_implementing_type(engines, impl_trait_decl.clone());
});
impl_trait_decl
}
parsed::Declaration::ImplSelf(impl_self) => {
let span = impl_self.block_span.clone();
let mut impl_trait = check!(
ty::TyImplTrait::type_check_impl_self(ctx.by_ref(), impl_self),
return ok(ty::TyDecl::ErrorRecovery(span), warnings, errors),
warnings,
errors
);
check!(
ctx.namespace.insert_trait_implementation(
impl_trait.trait_name.clone(),
impl_trait.trait_type_arguments.clone(),
impl_trait.implementing_for.type_id,
&impl_trait.items,
&impl_trait.span,
true,
engines,
),
return err(warnings, errors),
warnings,
errors
);
let impl_trait_decl: ty::TyDecl = decl_engine.insert(impl_trait.clone()).into();
impl_trait.items.iter_mut().for_each(|item| {
item.replace_implementing_type(engines, impl_trait_decl.clone())
});
impl_trait_decl
}
parsed::Declaration::StructDeclaration(decl) => {
let span = decl.span.clone();
let decl = check!(
ty::TyStructDecl::type_check(ctx.by_ref(), decl),
return ok(ty::TyDecl::ErrorRecovery(span), warnings, errors),
warnings,
errors
);
let call_path = decl.call_path.clone();
let decl: ty::TyDecl = decl_engine.insert(decl).into();
// insert the struct decl into namespace
check!(
ctx.namespace.insert_symbol(call_path.suffix, decl.clone()),
return err(warnings, errors),
warnings,
errors
);
decl
}
parsed::Declaration::AbiDeclaration(abi_decl) => {
let span = abi_decl.span.clone();
let mut abi_decl = check!(
ty::TyAbiDecl::type_check(ctx.by_ref(), abi_decl),
return ok(ty::TyDecl::ErrorRecovery(span), warnings, errors),
warnings,
errors
);
let name = abi_decl.name.clone();
// save decl_refs for the LSP
for supertrait in abi_decl.supertraits.iter_mut() {
ctx.namespace
.resolve_call_path(&supertrait.name)
.cloned()
.map(|supertrait_decl| {
if let ty::TyDecl::TraitDecl {
name: supertrait_name,
decl_id: supertrait_decl_id,
subst_list: _,
decl_span: supertrait_decl_span,
} = supertrait_decl
{
supertrait.decl_ref = Some(DeclRef::new(
supertrait_name,
supertrait_decl_id,
supertrait_decl_span,
));
}
});
}
let decl: ty::TyDecl = decl_engine.insert(abi_decl.clone()).into();
abi_decl
.items
.iter_mut()
.for_each(|item| item.replace_implementing_type(engines, decl.clone()));
check!(
ctx.namespace.insert_symbol(name, decl.clone()),
return err(warnings, errors),
warnings,
errors
);
decl
}
parsed::Declaration::StorageDeclaration(parsed::StorageDeclaration {
span,
fields,
attributes,
storage_keyword,
}) => {
let mut fields_buf = Vec::with_capacity(fields.len());
for parsed::StorageField {
name,
initializer,
mut type_argument,
attributes,
span: field_span,
..
} in fields
{
type_argument.type_id = check!(
ctx.resolve_type_without_self(type_argument.type_id, &name.span(), None),
return err(warnings, errors),
warnings,
errors
);
let mut ctx = ctx.by_ref().with_type_annotation(type_argument.type_id);
let initializer = check!(
ty::TyExpression::type_check(ctx.by_ref(), initializer),
return err(warnings, errors),
warnings,
errors,
);
fields_buf.push(ty::TyStorageField {
name,
type_argument,
initializer,
span: field_span,
attributes,
});
}
let decl = ty::TyStorageDecl {
fields: fields_buf,
span,
attributes,
storage_keyword,
};
let decl_ref = decl_engine.insert(decl);
// insert the storage declaration into the symbols
// if there already was one, return an error that duplicate storage
// declarations are not allowed
check!(
ctx.namespace.set_storage_declaration(decl_ref.clone()),
return err(warnings, errors),
warnings,
errors
);
decl_ref.into()
}
parsed::Declaration::TypeAliasDeclaration(decl) => {
let span = decl.name.span();
let name = decl.name.clone();
let ty = decl.ty;
// Resolve the type that the type alias replaces
let new_ty = check!(
ctx.resolve_type_with_self(ty.type_id, &span, EnforceTypeArguments::Yes, None),
type_engine.insert(decl_engine, TypeInfo::ErrorRecovery),
warnings,
errors
);
// create the type alias decl using the resolved type above
let decl = ty::TyTypeAliasDecl {
name: name.clone(),
attributes: decl.attributes,
ty: TypeArgument {
initial_type_id: ty.initial_type_id,
type_id: new_ty,
call_path_tree: ty.call_path_tree,
span: ty.span,
},
visibility: decl.visibility,
span,
};
let decl: ty::TyDecl = decl_engine.insert(decl).into();
// insert the type alias name and decl into namespace
check!(
ctx.namespace.insert_symbol(name, decl.clone()),
return err(warnings, errors),
warnings,
errors
);
decl
}
};
ok(decl, warnings, errors)
}
}