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|
mod scope;
use std::sync::Arc;
use ra_db::Cancelable;
use ra_syntax::{
TreePtr,
ast::{self, AstNode, NameOwner},
};
use crate::{
DefId, DefKind, HirDatabase, Name, AsName, Function, FnSignature, Module, HirFileId,
type_ref::{TypeRef, Mutability},
expr::Body,
impl_block::ImplBlock,
};
pub use self::scope::{FnScopes, ScopesWithSyntaxMapping, ScopeEntryWithSyntax};
impl Function {
pub(crate) fn new(def_id: DefId) -> Function {
Function { def_id }
}
pub(crate) fn source_impl(&self, db: &impl HirDatabase) -> (HirFileId, TreePtr<ast::FnDef>) {
let def_loc = self.def_id.loc(db);
assert!(def_loc.kind == DefKind::Function);
let syntax = db.file_item(def_loc.source_item_id);
(
def_loc.source_item_id.file_id,
ast::FnDef::cast(&syntax).unwrap().to_owned(),
)
}
pub(crate) fn body(&self, db: &impl HirDatabase) -> Cancelable<Arc<Body>> {
db.body_hir(self.def_id)
}
pub(crate) fn module(&self, db: &impl HirDatabase) -> Cancelable<Module> {
self.def_id.module(db)
}
/// The containing impl block, if this is a method.
pub(crate) fn impl_block(&self, db: &impl HirDatabase) -> Cancelable<Option<ImplBlock>> {
self.def_id.impl_block(db)
}
}
impl FnSignature {
pub(crate) fn fn_signature_query(db: &impl HirDatabase, def_id: DefId) -> Arc<FnSignature> {
let func = Function::new(def_id);
let node = func.source_impl(db).1; // TODO we're using source_impl here to avoid returning Cancelable... this is a bit hacky
let name = node
.name()
.map(|n| n.as_name())
.unwrap_or_else(Name::missing);
let mut args = Vec::new();
if let Some(param_list) = node.param_list() {
if let Some(self_param) = param_list.self_param() {
let self_type = if let Some(type_ref) = self_param.type_ref() {
TypeRef::from_ast(type_ref)
} else {
let self_type = TypeRef::Path(Name::self_type().into());
match self_param.flavor() {
ast::SelfParamFlavor::Owned => self_type,
ast::SelfParamFlavor::Ref => {
TypeRef::Reference(Box::new(self_type), Mutability::Shared)
}
ast::SelfParamFlavor::MutRef => {
TypeRef::Reference(Box::new(self_type), Mutability::Mut)
}
}
};
args.push(self_type);
}
for param in param_list.params() {
let type_ref = TypeRef::from_ast_opt(param.type_ref());
args.push(type_ref);
}
}
let ret_type = if let Some(type_ref) = node.ret_type().and_then(|rt| rt.type_ref()) {
TypeRef::from_ast(type_ref)
} else {
TypeRef::unit()
};
let sig = FnSignature {
name,
args,
ret_type,
};
Arc::new(sig)
}
}
|
