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https://github.com/rust-lang/rust.git
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83 lines
2.7 KiB
Rust
83 lines
2.7 KiB
Rust
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mod scope;
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use std::sync::Arc;
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use ra_db::Cancelable;
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use ra_syntax::{
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TreePtr,
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ast::{self, AstNode},
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};
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use crate::{
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DefId, DefKind, HirDatabase, Name, Function, FnSignature, Module,
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type_ref::{TypeRef, Mutability},
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expr::Body,
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impl_block::ImplBlock,
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};
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pub use self::scope::{FnScopes, ScopesWithSyntaxMapping};
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impl Function {
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pub(crate) fn new(def_id: DefId) -> Function {
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Function { def_id }
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}
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pub(crate) fn source_impl(&self, db: &impl HirDatabase) -> TreePtr<ast::FnDef> {
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let def_loc = self.def_id.loc(db);
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assert!(def_loc.kind == DefKind::Function);
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let syntax = db.file_item(def_loc.source_item_id);
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ast::FnDef::cast(&syntax).unwrap().to_owned()
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}
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pub(crate) fn body(&self, db: &impl HirDatabase) -> Cancelable<Arc<Body>> {
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db.body_hir(self.def_id)
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}
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pub(crate) fn module(&self, db: &impl HirDatabase) -> Cancelable<Module> {
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self.def_id.module(db)
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}
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/// The containing impl block, if this is a method.
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pub(crate) fn impl_block(&self, db: &impl HirDatabase) -> Cancelable<Option<ImplBlock>> {
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self.def_id.impl_block(db)
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}
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}
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impl FnSignature {
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pub(crate) fn fn_signature_query(db: &impl HirDatabase, def_id: DefId) -> Arc<FnSignature> {
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let func = Function::new(def_id);
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let node = func.source(db);
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let mut args = Vec::new();
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if let Some(param_list) = node.param_list() {
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if let Some(self_param) = param_list.self_param() {
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let self_type = if let Some(type_ref) = self_param.type_ref() {
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TypeRef::from_ast(type_ref)
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} else {
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let self_type = TypeRef::Path(Name::self_type().into());
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match self_param.flavor() {
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ast::SelfParamFlavor::Owned => self_type,
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ast::SelfParamFlavor::Ref => {
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TypeRef::Reference(Box::new(self_type), Mutability::Shared)
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}
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ast::SelfParamFlavor::MutRef => {
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TypeRef::Reference(Box::new(self_type), Mutability::Mut)
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}
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}
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};
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args.push(self_type);
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}
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for param in param_list.params() {
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let type_ref = TypeRef::from_ast_opt(param.type_ref());
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args.push(type_ref);
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}
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}
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let ret_type = if let Some(type_ref) = node.ret_type().and_then(|rt| rt.type_ref()) {
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TypeRef::from_ast(type_ref)
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} else {
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TypeRef::unit()
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};
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let sig = FnSignature { args, ret_type };
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Arc::new(sig)
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}
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}
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