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//! Contains basic data about various HIR declarations.
use std::sync::Arc;
use hir_expand::{
name::{self, AsName, Name},
AstId,
};
use ra_syntax::ast::{self, NameOwner, TypeAscriptionOwner};
use crate::{
db::DefDatabase,
type_ref::{Mutability, TypeRef},
AssocItemId, AstItemDef, ConstId, ConstLoc, ContainerId, FunctionId, FunctionLoc, HasSource,
ImplId, Intern, Lookup, StaticId, TraitId, TypeAliasId, TypeAliasLoc,
};
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct FunctionData {
pub name: Name,
pub params: Vec<TypeRef>,
pub ret_type: TypeRef,
/// True if the first param is `self`. This is relevant to decide whether this
/// can be called as a method.
pub has_self_param: bool,
}
impl FunctionData {
pub(crate) fn fn_data_query(db: &impl DefDatabase, func: FunctionId) -> Arc<FunctionData> {
let src = func.lookup(db).source(db);
let name = src.value.name().map(|n| n.as_name()).unwrap_or_else(Name::missing);
let mut params = Vec::new();
let mut has_self_param = false;
if let Some(param_list) = src.value.param_list() {
if let Some(self_param) = param_list.self_param() {
let self_type = if let Some(type_ref) = self_param.ascribed_type() {
TypeRef::from_ast(type_ref)
} else {
let self_type = TypeRef::Path(name::SELF_TYPE.into());
match self_param.kind() {
ast::SelfParamKind::Owned => self_type,
ast::SelfParamKind::Ref => {
TypeRef::Reference(Box::new(self_type), Mutability::Shared)
}
ast::SelfParamKind::MutRef => {
TypeRef::Reference(Box::new(self_type), Mutability::Mut)
}
}
};
params.push(self_type);
has_self_param = true;
}
for param in param_list.params() {
let type_ref = TypeRef::from_ast_opt(param.ascribed_type());
params.push(type_ref);
}
}
let ret_type = if let Some(type_ref) = src.value.ret_type().and_then(|rt| rt.type_ref()) {
TypeRef::from_ast(type_ref)
} else {
TypeRef::unit()
};
let sig = FunctionData { name, params, ret_type, has_self_param };
Arc::new(sig)
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct TypeAliasData {
pub name: Name,
pub type_ref: Option<TypeRef>,
}
impl TypeAliasData {
pub(crate) fn type_alias_data_query(
db: &impl DefDatabase,
typ: TypeAliasId,
) -> Arc<TypeAliasData> {
let node = typ.lookup(db).source(db).value;
let name = node.name().map_or_else(Name::missing, |n| n.as_name());
let type_ref = node.type_ref().map(TypeRef::from_ast);
Arc::new(TypeAliasData { name, type_ref })
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct TraitData {
pub name: Option<Name>,
pub items: Vec<(Name, AssocItemId)>,
pub auto: bool,
}
impl TraitData {
pub(crate) fn trait_data_query(db: &impl DefDatabase, tr: TraitId) -> Arc<TraitData> {
let src = tr.source(db);
let name = src.value.name().map(|n| n.as_name());
let auto = src.value.is_auto();
let ast_id_map = db.ast_id_map(src.file_id);
let container = ContainerId::TraitId(tr);
let items = if let Some(item_list) = src.value.item_list() {
item_list
.impl_items()
.map(|item_node| match item_node {
ast::ImplItem::FnDef(it) => {
let name = it.name().map(|it| it.as_name()).unwrap_or_else(Name::missing);
let def = FunctionLoc {
container,
ast_id: AstId::new(src.file_id, ast_id_map.ast_id(&it)),
}
.intern(db)
.into();
(name, def)
}
ast::ImplItem::ConstDef(it) => {
let name = it.name().map(|it| it.as_name()).unwrap_or_else(Name::missing);
let def = ConstLoc {
container,
ast_id: AstId::new(src.file_id, ast_id_map.ast_id(&it)),
}
.intern(db)
.into();
(name, def)
}
ast::ImplItem::TypeAliasDef(it) => {
let name = it.name().map(|it| it.as_name()).unwrap_or_else(Name::missing);
let def = TypeAliasLoc {
container,
ast_id: AstId::new(src.file_id, ast_id_map.ast_id(&it)),
}
.intern(db)
.into();
(name, def)
}
})
.collect()
} else {
Vec::new()
};
Arc::new(TraitData { name, items, auto })
}
pub fn associated_types(&self) -> impl Iterator<Item = TypeAliasId> + '_ {
self.items.iter().filter_map(|(_name, item)| match item {
AssocItemId::TypeAliasId(t) => Some(*t),
_ => None,
})
}
pub fn associated_type_by_name(&self, name: &Name) -> Option<TypeAliasId> {
self.items.iter().find_map(|(item_name, item)| match item {
AssocItemId::TypeAliasId(t) if item_name == name => Some(*t),
_ => None,
})
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ImplData {
pub target_trait: Option<TypeRef>,
pub target_type: TypeRef,
pub items: Vec<AssocItemId>,
pub is_negative: bool,
}
impl ImplData {
pub(crate) fn impl_data_query(db: &impl DefDatabase, id: ImplId) -> Arc<ImplData> {
let src = id.source(db);
let items = db.ast_id_map(src.file_id);
let target_trait = src.value.target_trait().map(TypeRef::from_ast);
let target_type = TypeRef::from_ast_opt(src.value.target_type());
let is_negative = src.value.is_negative();
let items = if let Some(item_list) = src.value.item_list() {
item_list
.impl_items()
.map(|item_node| match item_node {
ast::ImplItem::FnDef(it) => {
let def = FunctionLoc {
container: ContainerId::ImplId(id),
ast_id: AstId::new(src.file_id, items.ast_id(&it)),
}
.intern(db);
def.into()
}
ast::ImplItem::ConstDef(it) => {
let def = ConstLoc {
container: ContainerId::ImplId(id),
ast_id: AstId::new(src.file_id, items.ast_id(&it)),
}
.intern(db);
def.into()
}
ast::ImplItem::TypeAliasDef(it) => {
let def = TypeAliasLoc {
container: ContainerId::ImplId(id),
ast_id: AstId::new(src.file_id, items.ast_id(&it)),
}
.intern(db);
def.into()
}
})
.collect()
} else {
Vec::new()
};
let res = ImplData { target_trait, target_type, items, is_negative };
Arc::new(res)
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ConstData {
pub name: Option<Name>,
pub type_ref: TypeRef,
}
impl ConstData {
pub(crate) fn const_data_query(db: &impl DefDatabase, konst: ConstId) -> Arc<ConstData> {
let node = konst.lookup(db).source(db).value;
Arc::new(ConstData::new(&node))
}
pub(crate) fn static_data_query(db: &impl DefDatabase, konst: StaticId) -> Arc<ConstData> {
let node = konst.lookup(db).source(db).value;
Arc::new(ConstData::new(&node))
}
fn new<N: NameOwner + TypeAscriptionOwner>(node: &N) -> ConstData {
let name = node.name().map(|n| n.as_name());
let type_ref = TypeRef::from_ast_opt(node.ascribed_type());
ConstData { name, type_ref }
}
}
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