mod scope; use std::sync::Arc; use ra_db::Cancelable; use ra_syntax::{ TreePtr, ast::{self, AstNode}, }; use crate::{DefId, DefKind, HirDatabase, ty::InferenceResult, Module, Crate, impl_block::ImplBlock, expr::{Body, BodySyntaxMapping}, type_ref::{TypeRef, Mutability}, Name}; pub use self::scope::{FnScopes, ScopesWithSyntaxMapping}; #[derive(Debug, Clone, PartialEq, Eq)] pub struct Function { def_id: DefId, } impl Function { pub(crate) fn new(def_id: DefId) -> Function { Function { def_id } } pub fn def_id(&self) -> DefId { self.def_id } pub fn syntax(&self, db: &impl HirDatabase) -> TreePtr { let def_loc = self.def_id.loc(db); assert!(def_loc.kind == DefKind::Function); let syntax = db.file_item(def_loc.source_item_id); ast::FnDef::cast(&syntax).unwrap().to_owned() } pub fn body(&self, db: &impl HirDatabase) -> Cancelable> { db.body_hir(self.def_id) } pub fn body_syntax_mapping(&self, db: &impl HirDatabase) -> Cancelable> { db.body_syntax_mapping(self.def_id) } pub fn scopes(&self, db: &impl HirDatabase) -> Cancelable { let scopes = db.fn_scopes(self.def_id)?; let syntax_mapping = db.body_syntax_mapping(self.def_id)?; Ok(ScopesWithSyntaxMapping { scopes, syntax_mapping, }) } pub fn signature(&self, db: &impl HirDatabase) -> Arc { db.fn_signature(self.def_id) } pub fn infer(&self, db: &impl HirDatabase) -> Cancelable> { db.infer(self.def_id) } pub fn module(&self, db: &impl HirDatabase) -> Cancelable { self.def_id.module(db) } pub fn krate(&self, db: &impl HirDatabase) -> Cancelable> { self.def_id.krate(db) } /// The containing impl block, if this is a method. pub fn impl_block(&self, db: &impl HirDatabase) -> Cancelable> { self.def_id.impl_block(db) } } /// The declared signature of a function. #[derive(Debug, Clone, PartialEq, Eq)] pub struct FnSignature { args: Vec, ret_type: TypeRef, } impl FnSignature { pub fn args(&self) -> &[TypeRef] { &self.args } pub fn ret_type(&self) -> &TypeRef { &self.ret_type } } pub(crate) fn fn_signature(db: &impl HirDatabase, def_id: DefId) -> Arc { let func = Function::new(def_id); let node = func.syntax(db); 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 { args, ret_type }; Arc::new(sig) }