Merge #2223
2223: Move expression lowering to hir_def r=matklad a=matklad Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>
This commit is contained in:
bors[bot]
GitHub
commit
3322d65add
@ -113,10 +113,10 @@ fn generic_predicates_for_param(
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#[salsa::invoke(crate::ty::generic_defaults_query)]
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fn generic_defaults(&self, def: GenericDef) -> Substs;
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#[salsa::invoke(Body::body_with_source_map_query)]
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#[salsa::invoke(crate::expr::body_with_source_map_query)]
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fn body_with_source_map(&self, def: DefWithBody) -> (Arc<Body>, Arc<BodySourceMap>);
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#[salsa::invoke(Body::body_query)]
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#[salsa::invoke(crate::expr::body_query)]
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fn body(&self, def: DefWithBody) -> Arc<Body>;
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#[salsa::invoke(crate::ty::method_resolution::CrateImplBlocks::impls_in_crate_query)]
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@ -1,112 +1,52 @@
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//! FIXME: write short doc here
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pub(crate) mod lower;
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pub(crate) mod scope;
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pub(crate) mod validation;
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use std::{ops::Index, sync::Arc};
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use std::sync::Arc;
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use ra_arena::{map::ArenaMap, Arena};
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use ra_syntax::{ast, AstPtr};
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use rustc_hash::FxHashMap;
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use crate::{db::HirDatabase, DefWithBody, Either, HasSource, Resolver, Source};
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use crate::{db::HirDatabase, DefWithBody, HasSource, Resolver};
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pub use self::scope::ExprScopes;
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pub use hir_def::expr::{
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ArithOp, Array, BinaryOp, BindingAnnotation, CmpOp, Expr, ExprId, Literal, LogicOp, MatchArm,
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Ordering, Pat, PatId, RecordFieldPat, RecordLitField, Statement, UnaryOp,
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pub use hir_def::{
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body::{Body, BodySourceMap, ExprPtr, ExprSource, PatPtr, PatSource},
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expr::{
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ArithOp, Array, BinaryOp, BindingAnnotation, CmpOp, Expr, ExprId, Literal, LogicOp,
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MatchArm, Ordering, Pat, PatId, RecordFieldPat, RecordLitField, Statement, UnaryOp,
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},
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};
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/// The body of an item (function, const etc.).
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#[derive(Debug, Eq, PartialEq)]
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pub struct Body {
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exprs: Arena<ExprId, Expr>,
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pats: Arena<PatId, Pat>,
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/// The patterns for the function's parameters. While the parameter types are
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/// part of the function signature, the patterns are not (they don't change
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/// the external type of the function).
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///
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/// If this `Body` is for the body of a constant, this will just be
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/// empty.
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params: Vec<PatId>,
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/// The `ExprId` of the actual body expression.
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body_expr: ExprId,
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pub(crate) fn body_with_source_map_query(
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db: &impl HirDatabase,
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def: DefWithBody,
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) -> (Arc<Body>, Arc<BodySourceMap>) {
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let mut params = None;
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let (file_id, body) = match def {
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DefWithBody::Function(f) => {
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let src = f.source(db);
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params = src.ast.param_list();
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(src.file_id, src.ast.body().map(ast::Expr::from))
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}
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DefWithBody::Const(c) => {
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let src = c.source(db);
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(src.file_id, src.ast.body())
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}
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DefWithBody::Static(s) => {
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let src = s.source(db);
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(src.file_id, src.ast.body())
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}
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};
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let resolver = hir_def::body::MacroResolver::new(db, def.module(db).id);
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let (body, source_map) = Body::new(db, resolver, file_id, params, body);
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(Arc::new(body), Arc::new(source_map))
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}
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type ExprPtr = Either<AstPtr<ast::Expr>, AstPtr<ast::RecordField>>;
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type ExprSource = Source<ExprPtr>;
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type PatPtr = Either<AstPtr<ast::Pat>, AstPtr<ast::SelfParam>>;
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type PatSource = Source<PatPtr>;
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/// An item body together with the mapping from syntax nodes to HIR expression
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/// IDs. This is needed to go from e.g. a position in a file to the HIR
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/// expression containing it; but for type inference etc., we want to operate on
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/// a structure that is agnostic to the actual positions of expressions in the
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/// file, so that we don't recompute types whenever some whitespace is typed.
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///
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/// One complication here is that, due to macro expansion, a single `Body` might
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/// be spread across several files. So, for each ExprId and PatId, we record
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/// both the HirFileId and the position inside the file. However, we only store
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/// AST -> ExprId mapping for non-macro files, as it is not clear how to handle
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/// this properly for macros.
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#[derive(Default, Debug, Eq, PartialEq)]
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pub struct BodySourceMap {
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expr_map: FxHashMap<ExprPtr, ExprId>,
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expr_map_back: ArenaMap<ExprId, ExprSource>,
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pat_map: FxHashMap<PatPtr, PatId>,
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pat_map_back: ArenaMap<PatId, PatSource>,
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field_map: FxHashMap<(ExprId, usize), AstPtr<ast::RecordField>>,
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}
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impl Body {
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pub(crate) fn body_with_source_map_query(
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db: &impl HirDatabase,
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def: DefWithBody,
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) -> (Arc<Body>, Arc<BodySourceMap>) {
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let mut params = None;
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let (file_id, body) = match def {
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DefWithBody::Function(f) => {
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let src = f.source(db);
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params = src.ast.param_list();
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(src.file_id, src.ast.body().map(ast::Expr::from))
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}
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DefWithBody::Const(c) => {
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let src = c.source(db);
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(src.file_id, src.ast.body())
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}
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DefWithBody::Static(s) => {
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let src = s.source(db);
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(src.file_id, src.ast.body())
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}
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};
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let (body, source_map) = lower::lower(db, def.resolver(db), file_id, params, body);
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(Arc::new(body), Arc::new(source_map))
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}
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pub(crate) fn body_query(db: &impl HirDatabase, def: DefWithBody) -> Arc<Body> {
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db.body_with_source_map(def).0
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}
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pub fn params(&self) -> &[PatId] {
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&self.params
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}
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pub fn body_expr(&self) -> ExprId {
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self.body_expr
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}
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pub fn exprs(&self) -> impl Iterator<Item = (ExprId, &Expr)> {
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self.exprs.iter()
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}
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pub fn pats(&self) -> impl Iterator<Item = (PatId, &Pat)> {
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self.pats.iter()
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}
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pub(crate) fn body_query(db: &impl HirDatabase, def: DefWithBody) -> Arc<Body> {
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db.body_with_source_map(def).0
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}
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// needs arbitrary_self_types to be a method... or maybe move to the def?
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@ -132,41 +72,3 @@ pub(crate) fn resolver_for_scope(
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}
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r
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}
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impl Index<ExprId> for Body {
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type Output = Expr;
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fn index(&self, expr: ExprId) -> &Expr {
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&self.exprs[expr]
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}
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}
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impl Index<PatId> for Body {
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type Output = Pat;
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fn index(&self, pat: PatId) -> &Pat {
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&self.pats[pat]
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}
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}
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impl BodySourceMap {
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pub(crate) fn expr_syntax(&self, expr: ExprId) -> Option<ExprSource> {
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self.expr_map_back.get(expr).copied()
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}
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pub(crate) fn node_expr(&self, node: &ast::Expr) -> Option<ExprId> {
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self.expr_map.get(&Either::A(AstPtr::new(node))).cloned()
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}
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pub(crate) fn pat_syntax(&self, pat: PatId) -> Option<PatSource> {
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self.pat_map_back.get(pat).copied()
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}
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pub(crate) fn node_pat(&self, node: &ast::Pat) -> Option<PatId> {
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self.pat_map.get(&Either::A(AstPtr::new(node))).cloned()
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}
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pub(crate) fn field_syntax(&self, expr: ExprId, field: usize) -> AstPtr<ast::RecordField> {
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self.field_map[&(expr, field)]
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}
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}
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@ -1,593 +0,0 @@
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//! FIXME: write short doc here
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use hir_def::{
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builtin_type::{BuiltinFloat, BuiltinInt},
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path::GenericArgs,
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type_ref::TypeRef,
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};
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use hir_expand::{
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hygiene::Hygiene,
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name::{self, AsName, Name},
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};
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use ra_arena::Arena;
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use ra_syntax::{
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ast::{
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self, ArgListOwner, ArrayExprKind, LiteralKind, LoopBodyOwner, NameOwner,
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TypeAscriptionOwner,
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},
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AstNode, AstPtr,
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};
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use test_utils::tested_by;
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use crate::{
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db::HirDatabase, AstId, Either, HirFileId, MacroCallLoc, MacroFileKind, Mutability, Path,
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Resolver, Source,
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};
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use super::{
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Array, BinaryOp, BindingAnnotation, Body, BodySourceMap, Expr, ExprId, Literal, MatchArm, Pat,
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PatId, PatPtr, RecordFieldPat, RecordLitField, Statement,
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};
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pub(super) fn lower(
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db: &impl HirDatabase,
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resolver: Resolver,
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file_id: HirFileId,
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params: Option<ast::ParamList>,
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body: Option<ast::Expr>,
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) -> (Body, BodySourceMap) {
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ExprCollector {
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resolver,
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db,
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original_file_id: file_id,
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current_file_id: file_id,
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source_map: BodySourceMap::default(),
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body: Body {
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exprs: Arena::default(),
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pats: Arena::default(),
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params: Vec::new(),
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body_expr: ExprId::dummy(),
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},
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}
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.collect(params, body)
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}
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struct ExprCollector<DB> {
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db: DB,
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resolver: Resolver,
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// Expr collector expands macros along the way. original points to the file
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// we started with, current points to the current macro expansion. source
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// maps don't support macros yet, so we only record info into source map if
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// current == original (see #1196)
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original_file_id: HirFileId,
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current_file_id: HirFileId,
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body: Body,
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source_map: BodySourceMap,
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}
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impl<'a, DB> ExprCollector<&'a DB>
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where
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DB: HirDatabase,
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{
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fn collect(
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mut self,
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param_list: Option<ast::ParamList>,
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body: Option<ast::Expr>,
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) -> (Body, BodySourceMap) {
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if let Some(param_list) = param_list {
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if let Some(self_param) = param_list.self_param() {
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let ptr = AstPtr::new(&self_param);
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let param_pat = self.alloc_pat(
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Pat::Bind {
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name: name::SELF_PARAM,
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mode: BindingAnnotation::Unannotated,
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subpat: None,
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},
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Either::B(ptr),
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);
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self.body.params.push(param_pat);
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}
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for param in param_list.params() {
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let pat = match param.pat() {
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None => continue,
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Some(pat) => pat,
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};
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let param_pat = self.collect_pat(pat);
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self.body.params.push(param_pat);
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}
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};
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self.body.body_expr = self.collect_expr_opt(body);
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(self.body, self.source_map)
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}
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fn alloc_expr(&mut self, expr: Expr, ptr: AstPtr<ast::Expr>) -> ExprId {
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let ptr = Either::A(ptr);
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let id = self.body.exprs.alloc(expr);
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if self.current_file_id == self.original_file_id {
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self.source_map.expr_map.insert(ptr, id);
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}
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self.source_map
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.expr_map_back
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.insert(id, Source { file_id: self.current_file_id, ast: ptr });
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id
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}
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// desugared exprs don't have ptr, that's wrong and should be fixed
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// somehow.
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fn alloc_expr_desugared(&mut self, expr: Expr) -> ExprId {
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self.body.exprs.alloc(expr)
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}
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fn alloc_expr_field_shorthand(&mut self, expr: Expr, ptr: AstPtr<ast::RecordField>) -> ExprId {
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let ptr = Either::B(ptr);
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let id = self.body.exprs.alloc(expr);
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if self.current_file_id == self.original_file_id {
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self.source_map.expr_map.insert(ptr, id);
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}
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self.source_map
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.expr_map_back
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.insert(id, Source { file_id: self.current_file_id, ast: ptr });
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id
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}
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fn alloc_pat(&mut self, pat: Pat, ptr: PatPtr) -> PatId {
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let id = self.body.pats.alloc(pat);
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if self.current_file_id == self.original_file_id {
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self.source_map.pat_map.insert(ptr, id);
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}
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self.source_map.pat_map_back.insert(id, Source { file_id: self.current_file_id, ast: ptr });
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id
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}
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fn empty_block(&mut self) -> ExprId {
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let block = Expr::Block { statements: Vec::new(), tail: None };
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self.body.exprs.alloc(block)
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}
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fn missing_expr(&mut self) -> ExprId {
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self.body.exprs.alloc(Expr::Missing)
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}
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fn missing_pat(&mut self) -> PatId {
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self.body.pats.alloc(Pat::Missing)
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}
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fn collect_expr(&mut self, expr: ast::Expr) -> ExprId {
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let syntax_ptr = AstPtr::new(&expr);
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match expr {
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ast::Expr::IfExpr(e) => {
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let then_branch = self.collect_block_opt(e.then_branch());
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let else_branch = e.else_branch().map(|b| match b {
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ast::ElseBranch::Block(it) => self.collect_block(it),
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ast::ElseBranch::IfExpr(elif) => {
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let expr: ast::Expr = ast::Expr::cast(elif.syntax().clone()).unwrap();
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self.collect_expr(expr)
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}
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});
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let condition = match e.condition() {
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None => self.missing_expr(),
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Some(condition) => match condition.pat() {
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None => self.collect_expr_opt(condition.expr()),
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// if let -- desugar to match
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Some(pat) => {
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let pat = self.collect_pat(pat);
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let match_expr = self.collect_expr_opt(condition.expr());
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let placeholder_pat = self.missing_pat();
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let arms = vec![
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MatchArm { pats: vec![pat], expr: then_branch, guard: None },
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MatchArm {
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pats: vec![placeholder_pat],
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expr: else_branch.unwrap_or_else(|| self.empty_block()),
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guard: None,
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},
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];
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return self
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.alloc_expr(Expr::Match { expr: match_expr, arms }, syntax_ptr);
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}
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},
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};
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self.alloc_expr(Expr::If { condition, then_branch, else_branch }, syntax_ptr)
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}
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ast::Expr::TryBlockExpr(e) => {
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let body = self.collect_block_opt(e.body());
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self.alloc_expr(Expr::TryBlock { body }, syntax_ptr)
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}
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ast::Expr::BlockExpr(e) => self.collect_block(e),
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ast::Expr::LoopExpr(e) => {
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let body = self.collect_block_opt(e.loop_body());
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self.alloc_expr(Expr::Loop { body }, syntax_ptr)
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}
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ast::Expr::WhileExpr(e) => {
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let body = self.collect_block_opt(e.loop_body());
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let condition = match e.condition() {
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None => self.missing_expr(),
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Some(condition) => match condition.pat() {
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None => self.collect_expr_opt(condition.expr()),
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// if let -- desugar to match
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Some(pat) => {
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tested_by!(infer_while_let);
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let pat = self.collect_pat(pat);
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let match_expr = self.collect_expr_opt(condition.expr());
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let placeholder_pat = self.missing_pat();
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let break_ = self.alloc_expr_desugared(Expr::Break { expr: None });
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let arms = vec![
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MatchArm { pats: vec![pat], expr: body, guard: None },
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MatchArm { pats: vec![placeholder_pat], expr: break_, guard: None },
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];
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let match_expr =
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self.alloc_expr_desugared(Expr::Match { expr: match_expr, arms });
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return self.alloc_expr(Expr::Loop { body: match_expr }, syntax_ptr);
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}
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},
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};
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self.alloc_expr(Expr::While { condition, body }, syntax_ptr)
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}
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ast::Expr::ForExpr(e) => {
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let iterable = self.collect_expr_opt(e.iterable());
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let pat = self.collect_pat_opt(e.pat());
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let body = self.collect_block_opt(e.loop_body());
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self.alloc_expr(Expr::For { iterable, pat, body }, syntax_ptr)
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}
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ast::Expr::CallExpr(e) => {
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let callee = self.collect_expr_opt(e.expr());
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let args = if let Some(arg_list) = e.arg_list() {
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arg_list.args().map(|e| self.collect_expr(e)).collect()
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} else {
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Vec::new()
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};
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self.alloc_expr(Expr::Call { callee, args }, syntax_ptr)
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}
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ast::Expr::MethodCallExpr(e) => {
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||||
let receiver = self.collect_expr_opt(e.expr());
|
||||
let args = if let Some(arg_list) = e.arg_list() {
|
||||
arg_list.args().map(|e| self.collect_expr(e)).collect()
|
||||
} else {
|
||||
Vec::new()
|
||||
};
|
||||
let method_name = e.name_ref().map(|nr| nr.as_name()).unwrap_or_else(Name::missing);
|
||||
let generic_args = e.type_arg_list().and_then(GenericArgs::from_ast);
|
||||
self.alloc_expr(
|
||||
Expr::MethodCall { receiver, method_name, args, generic_args },
|
||||
syntax_ptr,
|
||||
)
|
||||
}
|
||||
ast::Expr::MatchExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
let arms = if let Some(match_arm_list) = e.match_arm_list() {
|
||||
match_arm_list
|
||||
.arms()
|
||||
.map(|arm| MatchArm {
|
||||
pats: arm.pats().map(|p| self.collect_pat(p)).collect(),
|
||||
expr: self.collect_expr_opt(arm.expr()),
|
||||
guard: arm
|
||||
.guard()
|
||||
.and_then(|guard| guard.expr())
|
||||
.map(|e| self.collect_expr(e)),
|
||||
})
|
||||
.collect()
|
||||
} else {
|
||||
Vec::new()
|
||||
};
|
||||
self.alloc_expr(Expr::Match { expr, arms }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::PathExpr(e) => {
|
||||
let path = e
|
||||
.path()
|
||||
.and_then(|path| self.parse_path(path))
|
||||
.map(Expr::Path)
|
||||
.unwrap_or(Expr::Missing);
|
||||
self.alloc_expr(path, syntax_ptr)
|
||||
}
|
||||
ast::Expr::ContinueExpr(_e) => {
|
||||
// FIXME: labels
|
||||
self.alloc_expr(Expr::Continue, syntax_ptr)
|
||||
}
|
||||
ast::Expr::BreakExpr(e) => {
|
||||
let expr = e.expr().map(|e| self.collect_expr(e));
|
||||
self.alloc_expr(Expr::Break { expr }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::ParenExpr(e) => {
|
||||
let inner = self.collect_expr_opt(e.expr());
|
||||
// make the paren expr point to the inner expression as well
|
||||
self.source_map.expr_map.insert(Either::A(syntax_ptr), inner);
|
||||
inner
|
||||
}
|
||||
ast::Expr::ReturnExpr(e) => {
|
||||
let expr = e.expr().map(|e| self.collect_expr(e));
|
||||
self.alloc_expr(Expr::Return { expr }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::RecordLit(e) => {
|
||||
let path = e.path().and_then(|path| self.parse_path(path));
|
||||
let mut field_ptrs = Vec::new();
|
||||
let record_lit = if let Some(nfl) = e.record_field_list() {
|
||||
let fields = nfl
|
||||
.fields()
|
||||
.inspect(|field| field_ptrs.push(AstPtr::new(field)))
|
||||
.map(|field| RecordLitField {
|
||||
name: field
|
||||
.name_ref()
|
||||
.map(|nr| nr.as_name())
|
||||
.unwrap_or_else(Name::missing),
|
||||
expr: if let Some(e) = field.expr() {
|
||||
self.collect_expr(e)
|
||||
} else if let Some(nr) = field.name_ref() {
|
||||
// field shorthand
|
||||
self.alloc_expr_field_shorthand(
|
||||
Expr::Path(Path::from_name_ref(&nr)),
|
||||
AstPtr::new(&field),
|
||||
)
|
||||
} else {
|
||||
self.missing_expr()
|
||||
},
|
||||
})
|
||||
.collect();
|
||||
let spread = nfl.spread().map(|s| self.collect_expr(s));
|
||||
Expr::RecordLit { path, fields, spread }
|
||||
} else {
|
||||
Expr::RecordLit { path, fields: Vec::new(), spread: None }
|
||||
};
|
||||
|
||||
let res = self.alloc_expr(record_lit, syntax_ptr);
|
||||
for (i, ptr) in field_ptrs.into_iter().enumerate() {
|
||||
self.source_map.field_map.insert((res, i), ptr);
|
||||
}
|
||||
res
|
||||
}
|
||||
ast::Expr::FieldExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
let name = match e.field_access() {
|
||||
Some(kind) => kind.as_name(),
|
||||
_ => Name::missing(),
|
||||
};
|
||||
self.alloc_expr(Expr::Field { expr, name }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::AwaitExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
self.alloc_expr(Expr::Await { expr }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::TryExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
self.alloc_expr(Expr::Try { expr }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::CastExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
let type_ref = TypeRef::from_ast_opt(e.type_ref());
|
||||
self.alloc_expr(Expr::Cast { expr, type_ref }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::RefExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
let mutability = Mutability::from_mutable(e.is_mut());
|
||||
self.alloc_expr(Expr::Ref { expr, mutability }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::PrefixExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
if let Some(op) = e.op_kind() {
|
||||
self.alloc_expr(Expr::UnaryOp { expr, op }, syntax_ptr)
|
||||
} else {
|
||||
self.alloc_expr(Expr::Missing, syntax_ptr)
|
||||
}
|
||||
}
|
||||
ast::Expr::LambdaExpr(e) => {
|
||||
let mut args = Vec::new();
|
||||
let mut arg_types = Vec::new();
|
||||
if let Some(pl) = e.param_list() {
|
||||
for param in pl.params() {
|
||||
let pat = self.collect_pat_opt(param.pat());
|
||||
let type_ref = param.ascribed_type().map(TypeRef::from_ast);
|
||||
args.push(pat);
|
||||
arg_types.push(type_ref);
|
||||
}
|
||||
}
|
||||
let body = self.collect_expr_opt(e.body());
|
||||
self.alloc_expr(Expr::Lambda { args, arg_types, body }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::BinExpr(e) => {
|
||||
let lhs = self.collect_expr_opt(e.lhs());
|
||||
let rhs = self.collect_expr_opt(e.rhs());
|
||||
let op = e.op_kind().map(BinaryOp::from);
|
||||
self.alloc_expr(Expr::BinaryOp { lhs, rhs, op }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::TupleExpr(e) => {
|
||||
let exprs = e.exprs().map(|expr| self.collect_expr(expr)).collect();
|
||||
self.alloc_expr(Expr::Tuple { exprs }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::BoxExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
self.alloc_expr(Expr::Box { expr }, syntax_ptr)
|
||||
}
|
||||
|
||||
ast::Expr::ArrayExpr(e) => {
|
||||
let kind = e.kind();
|
||||
|
||||
match kind {
|
||||
ArrayExprKind::ElementList(e) => {
|
||||
let exprs = e.map(|expr| self.collect_expr(expr)).collect();
|
||||
self.alloc_expr(Expr::Array(Array::ElementList(exprs)), syntax_ptr)
|
||||
}
|
||||
ArrayExprKind::Repeat { initializer, repeat } => {
|
||||
let initializer = self.collect_expr_opt(initializer);
|
||||
let repeat = self.collect_expr_opt(repeat);
|
||||
self.alloc_expr(
|
||||
Expr::Array(Array::Repeat { initializer, repeat }),
|
||||
syntax_ptr,
|
||||
)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ast::Expr::Literal(e) => {
|
||||
let lit = match e.kind() {
|
||||
LiteralKind::IntNumber { suffix } => {
|
||||
let known_name = suffix.and_then(|it| BuiltinInt::from_suffix(&it));
|
||||
|
||||
Literal::Int(Default::default(), known_name)
|
||||
}
|
||||
LiteralKind::FloatNumber { suffix } => {
|
||||
let known_name = suffix.and_then(|it| BuiltinFloat::from_suffix(&it));
|
||||
|
||||
Literal::Float(Default::default(), known_name)
|
||||
}
|
||||
LiteralKind::ByteString => Literal::ByteString(Default::default()),
|
||||
LiteralKind::String => Literal::String(Default::default()),
|
||||
LiteralKind::Byte => Literal::Int(Default::default(), Some(BuiltinInt::U8)),
|
||||
LiteralKind::Bool => Literal::Bool(Default::default()),
|
||||
LiteralKind::Char => Literal::Char(Default::default()),
|
||||
};
|
||||
self.alloc_expr(Expr::Literal(lit), syntax_ptr)
|
||||
}
|
||||
ast::Expr::IndexExpr(e) => {
|
||||
let base = self.collect_expr_opt(e.base());
|
||||
let index = self.collect_expr_opt(e.index());
|
||||
self.alloc_expr(Expr::Index { base, index }, syntax_ptr)
|
||||
}
|
||||
|
||||
// FIXME implement HIR for these:
|
||||
ast::Expr::Label(_e) => self.alloc_expr(Expr::Missing, syntax_ptr),
|
||||
ast::Expr::RangeExpr(_e) => self.alloc_expr(Expr::Missing, syntax_ptr),
|
||||
ast::Expr::MacroCall(e) => {
|
||||
let ast_id = AstId::new(
|
||||
self.current_file_id,
|
||||
self.db.ast_id_map(self.current_file_id).ast_id(&e),
|
||||
);
|
||||
|
||||
if let Some(path) = e.path().and_then(|path| self.parse_path(path)) {
|
||||
if let Some(def) = self.resolver.resolve_path_as_macro(self.db, &path) {
|
||||
let call_id = self.db.intern_macro(MacroCallLoc { def: def.id, ast_id });
|
||||
let file_id = call_id.as_file(MacroFileKind::Expr);
|
||||
if let Some(node) = self.db.parse_or_expand(file_id) {
|
||||
if let Some(expr) = ast::Expr::cast(node) {
|
||||
log::debug!("macro expansion {:#?}", expr.syntax());
|
||||
let old_file_id =
|
||||
std::mem::replace(&mut self.current_file_id, file_id);
|
||||
let id = self.collect_expr(expr);
|
||||
self.current_file_id = old_file_id;
|
||||
return id;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// FIXME: Instead of just dropping the error from expansion
|
||||
// report it
|
||||
self.alloc_expr(Expr::Missing, syntax_ptr)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn collect_expr_opt(&mut self, expr: Option<ast::Expr>) -> ExprId {
|
||||
if let Some(expr) = expr {
|
||||
self.collect_expr(expr)
|
||||
} else {
|
||||
self.missing_expr()
|
||||
}
|
||||
}
|
||||
|
||||
fn collect_block(&mut self, expr: ast::BlockExpr) -> ExprId {
|
||||
let syntax_node_ptr = AstPtr::new(&expr.clone().into());
|
||||
let block = match expr.block() {
|
||||
Some(block) => block,
|
||||
None => return self.alloc_expr(Expr::Missing, syntax_node_ptr),
|
||||
};
|
||||
let statements = block
|
||||
.statements()
|
||||
.map(|s| match s {
|
||||
ast::Stmt::LetStmt(stmt) => {
|
||||
let pat = self.collect_pat_opt(stmt.pat());
|
||||
let type_ref = stmt.ascribed_type().map(TypeRef::from_ast);
|
||||
let initializer = stmt.initializer().map(|e| self.collect_expr(e));
|
||||
Statement::Let { pat, type_ref, initializer }
|
||||
}
|
||||
ast::Stmt::ExprStmt(stmt) => Statement::Expr(self.collect_expr_opt(stmt.expr())),
|
||||
})
|
||||
.collect();
|
||||
let tail = block.expr().map(|e| self.collect_expr(e));
|
||||
self.alloc_expr(Expr::Block { statements, tail }, syntax_node_ptr)
|
||||
}
|
||||
|
||||
fn collect_block_opt(&mut self, expr: Option<ast::BlockExpr>) -> ExprId {
|
||||
if let Some(block) = expr {
|
||||
self.collect_block(block)
|
||||
} else {
|
||||
self.missing_expr()
|
||||
}
|
||||
}
|
||||
|
||||
fn collect_pat(&mut self, pat: ast::Pat) -> PatId {
|
||||
let pattern = match &pat {
|
||||
ast::Pat::BindPat(bp) => {
|
||||
let name = bp.name().map(|nr| nr.as_name()).unwrap_or_else(Name::missing);
|
||||
let annotation = BindingAnnotation::new(bp.is_mutable(), bp.is_ref());
|
||||
let subpat = bp.pat().map(|subpat| self.collect_pat(subpat));
|
||||
Pat::Bind { name, mode: annotation, subpat }
|
||||
}
|
||||
ast::Pat::TupleStructPat(p) => {
|
||||
let path = p.path().and_then(|path| self.parse_path(path));
|
||||
let args = p.args().map(|p| self.collect_pat(p)).collect();
|
||||
Pat::TupleStruct { path, args }
|
||||
}
|
||||
ast::Pat::RefPat(p) => {
|
||||
let pat = self.collect_pat_opt(p.pat());
|
||||
let mutability = Mutability::from_mutable(p.is_mut());
|
||||
Pat::Ref { pat, mutability }
|
||||
}
|
||||
ast::Pat::PathPat(p) => {
|
||||
let path = p.path().and_then(|path| self.parse_path(path));
|
||||
path.map(Pat::Path).unwrap_or(Pat::Missing)
|
||||
}
|
||||
ast::Pat::TuplePat(p) => {
|
||||
let args = p.args().map(|p| self.collect_pat(p)).collect();
|
||||
Pat::Tuple(args)
|
||||
}
|
||||
ast::Pat::PlaceholderPat(_) => Pat::Wild,
|
||||
ast::Pat::RecordPat(p) => {
|
||||
let path = p.path().and_then(|path| self.parse_path(path));
|
||||
let record_field_pat_list =
|
||||
p.record_field_pat_list().expect("every struct should have a field list");
|
||||
let mut fields: Vec<_> = record_field_pat_list
|
||||
.bind_pats()
|
||||
.filter_map(|bind_pat| {
|
||||
let ast_pat =
|
||||
ast::Pat::cast(bind_pat.syntax().clone()).expect("bind pat is a pat");
|
||||
let pat = self.collect_pat(ast_pat);
|
||||
let name = bind_pat.name()?.as_name();
|
||||
Some(RecordFieldPat { name, pat })
|
||||
})
|
||||
.collect();
|
||||
let iter = record_field_pat_list.record_field_pats().filter_map(|f| {
|
||||
let ast_pat = f.pat()?;
|
||||
let pat = self.collect_pat(ast_pat);
|
||||
let name = f.name()?.as_name();
|
||||
Some(RecordFieldPat { name, pat })
|
||||
});
|
||||
fields.extend(iter);
|
||||
|
||||
Pat::Record { path, args: fields }
|
||||
}
|
||||
|
||||
// FIXME: implement
|
||||
ast::Pat::DotDotPat(_) => Pat::Missing,
|
||||
ast::Pat::BoxPat(_) => Pat::Missing,
|
||||
ast::Pat::LiteralPat(_) => Pat::Missing,
|
||||
ast::Pat::SlicePat(_) | ast::Pat::RangePat(_) => Pat::Missing,
|
||||
};
|
||||
let ptr = AstPtr::new(&pat);
|
||||
self.alloc_pat(pattern, Either::A(ptr))
|
||||
}
|
||||
|
||||
fn collect_pat_opt(&mut self, pat: Option<ast::Pat>) -> PatId {
|
||||
if let Some(pat) = pat {
|
||||
self.collect_pat(pat)
|
||||
} else {
|
||||
self.missing_pat()
|
||||
}
|
||||
}
|
||||
|
||||
fn parse_path(&mut self, path: ast::Path) -> Option<Path> {
|
||||
let hygiene = Hygiene::new(self.db, self.current_file_id);
|
||||
Path::from_src(path, &hygiene)
|
||||
}
|
||||
}
|
||||
@ -5,6 +5,5 @@
|
||||
type_var_cycles_resolve_as_possible
|
||||
type_var_resolves_to_int_var
|
||||
match_ergonomics_ref
|
||||
infer_while_let
|
||||
coerce_merge_fail_fallback
|
||||
);
|
||||
|
||||
@ -222,7 +222,6 @@ impl<T> crate::iter::IntoIterator for Vec<T> {
|
||||
|
||||
#[test]
|
||||
fn infer_while_let() {
|
||||
covers!(infer_while_let);
|
||||
let (db, pos) = TestDB::with_position(
|
||||
r#"
|
||||
//- /main.rs
|
||||
|
||||
@ -1,2 +1,144 @@
|
||||
//! FIXME: write short doc here
|
||||
mod lower;
|
||||
|
||||
use std::{ops::Index, sync::Arc};
|
||||
|
||||
use hir_expand::{either::Either, HirFileId, MacroDefId, Source};
|
||||
use ra_arena::{map::ArenaMap, Arena};
|
||||
use ra_syntax::{ast, AstPtr};
|
||||
use rustc_hash::FxHashMap;
|
||||
|
||||
use crate::{
|
||||
db::DefDatabase2,
|
||||
expr::{Expr, ExprId, Pat, PatId},
|
||||
nameres::CrateDefMap,
|
||||
path::Path,
|
||||
ModuleId,
|
||||
};
|
||||
|
||||
pub struct MacroResolver {
|
||||
crate_def_map: Arc<CrateDefMap>,
|
||||
module: ModuleId,
|
||||
}
|
||||
|
||||
impl MacroResolver {
|
||||
pub fn new(db: &impl DefDatabase2, module: ModuleId) -> MacroResolver {
|
||||
MacroResolver { crate_def_map: db.crate_def_map(module.krate), module }
|
||||
}
|
||||
|
||||
pub(crate) fn resolve_path_as_macro(
|
||||
&self,
|
||||
db: &impl DefDatabase2,
|
||||
path: &Path,
|
||||
) -> Option<MacroDefId> {
|
||||
self.crate_def_map.resolve_path(db, self.module.module_id, path).0.get_macros()
|
||||
}
|
||||
}
|
||||
|
||||
/// The body of an item (function, const etc.).
|
||||
#[derive(Debug, Eq, PartialEq)]
|
||||
pub struct Body {
|
||||
exprs: Arena<ExprId, Expr>,
|
||||
pats: Arena<PatId, Pat>,
|
||||
/// The patterns for the function's parameters. While the parameter types are
|
||||
/// part of the function signature, the patterns are not (they don't change
|
||||
/// the external type of the function).
|
||||
///
|
||||
/// If this `Body` is for the body of a constant, this will just be
|
||||
/// empty.
|
||||
params: Vec<PatId>,
|
||||
/// The `ExprId` of the actual body expression.
|
||||
body_expr: ExprId,
|
||||
}
|
||||
|
||||
pub type ExprPtr = Either<AstPtr<ast::Expr>, AstPtr<ast::RecordField>>;
|
||||
pub type ExprSource = Source<ExprPtr>;
|
||||
|
||||
pub type PatPtr = Either<AstPtr<ast::Pat>, AstPtr<ast::SelfParam>>;
|
||||
pub type PatSource = Source<PatPtr>;
|
||||
|
||||
/// An item body together with the mapping from syntax nodes to HIR expression
|
||||
/// IDs. This is needed to go from e.g. a position in a file to the HIR
|
||||
/// expression containing it; but for type inference etc., we want to operate on
|
||||
/// a structure that is agnostic to the actual positions of expressions in the
|
||||
/// file, so that we don't recompute types whenever some whitespace is typed.
|
||||
///
|
||||
/// One complication here is that, due to macro expansion, a single `Body` might
|
||||
/// be spread across several files. So, for each ExprId and PatId, we record
|
||||
/// both the HirFileId and the position inside the file. However, we only store
|
||||
/// AST -> ExprId mapping for non-macro files, as it is not clear how to handle
|
||||
/// this properly for macros.
|
||||
#[derive(Default, Debug, Eq, PartialEq)]
|
||||
pub struct BodySourceMap {
|
||||
expr_map: FxHashMap<ExprPtr, ExprId>,
|
||||
expr_map_back: ArenaMap<ExprId, ExprSource>,
|
||||
pat_map: FxHashMap<PatPtr, PatId>,
|
||||
pat_map_back: ArenaMap<PatId, PatSource>,
|
||||
field_map: FxHashMap<(ExprId, usize), AstPtr<ast::RecordField>>,
|
||||
}
|
||||
|
||||
impl Body {
|
||||
pub fn new(
|
||||
db: &impl DefDatabase2,
|
||||
resolver: MacroResolver,
|
||||
file_id: HirFileId,
|
||||
params: Option<ast::ParamList>,
|
||||
body: Option<ast::Expr>,
|
||||
) -> (Body, BodySourceMap) {
|
||||
lower::lower(db, resolver, file_id, params, body)
|
||||
}
|
||||
|
||||
pub fn params(&self) -> &[PatId] {
|
||||
&self.params
|
||||
}
|
||||
|
||||
pub fn body_expr(&self) -> ExprId {
|
||||
self.body_expr
|
||||
}
|
||||
|
||||
pub fn exprs(&self) -> impl Iterator<Item = (ExprId, &Expr)> {
|
||||
self.exprs.iter()
|
||||
}
|
||||
|
||||
pub fn pats(&self) -> impl Iterator<Item = (PatId, &Pat)> {
|
||||
self.pats.iter()
|
||||
}
|
||||
}
|
||||
|
||||
impl Index<ExprId> for Body {
|
||||
type Output = Expr;
|
||||
|
||||
fn index(&self, expr: ExprId) -> &Expr {
|
||||
&self.exprs[expr]
|
||||
}
|
||||
}
|
||||
|
||||
impl Index<PatId> for Body {
|
||||
type Output = Pat;
|
||||
|
||||
fn index(&self, pat: PatId) -> &Pat {
|
||||
&self.pats[pat]
|
||||
}
|
||||
}
|
||||
|
||||
impl BodySourceMap {
|
||||
pub fn expr_syntax(&self, expr: ExprId) -> Option<ExprSource> {
|
||||
self.expr_map_back.get(expr).copied()
|
||||
}
|
||||
|
||||
pub fn node_expr(&self, node: &ast::Expr) -> Option<ExprId> {
|
||||
self.expr_map.get(&Either::A(AstPtr::new(node))).cloned()
|
||||
}
|
||||
|
||||
pub fn pat_syntax(&self, pat: PatId) -> Option<PatSource> {
|
||||
self.pat_map_back.get(pat).copied()
|
||||
}
|
||||
|
||||
pub fn node_pat(&self, node: &ast::Pat) -> Option<PatId> {
|
||||
self.pat_map.get(&Either::A(AstPtr::new(node))).cloned()
|
||||
}
|
||||
|
||||
pub fn field_syntax(&self, expr: ExprId, field: usize) -> AstPtr<ast::RecordField> {
|
||||
self.field_map[&(expr, field)]
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,8 +1,590 @@
|
||||
//! FIXME: write short doc here
|
||||
|
||||
use ra_syntax::ast;
|
||||
use hir_expand::{
|
||||
either::Either,
|
||||
hygiene::Hygiene,
|
||||
name::{self, AsName, Name},
|
||||
AstId, HirFileId, MacroCallLoc, MacroFileKind, Source,
|
||||
};
|
||||
use ra_arena::Arena;
|
||||
use ra_syntax::{
|
||||
ast::{
|
||||
self, ArgListOwner, ArrayExprKind, LiteralKind, LoopBodyOwner, NameOwner,
|
||||
TypeAscriptionOwner,
|
||||
},
|
||||
AstNode, AstPtr,
|
||||
};
|
||||
|
||||
use crate::expr::{ArithOp, BinaryOp, CmpOp, LogicOp, Ordering};
|
||||
use crate::{
|
||||
body::{Body, BodySourceMap, MacroResolver, PatPtr},
|
||||
builtin_type::{BuiltinFloat, BuiltinInt},
|
||||
db::DefDatabase2,
|
||||
expr::{
|
||||
ArithOp, Array, BinaryOp, BindingAnnotation, CmpOp, Expr, ExprId, Literal, LogicOp,
|
||||
MatchArm, Ordering, Pat, PatId, RecordFieldPat, RecordLitField, Statement,
|
||||
},
|
||||
path::GenericArgs,
|
||||
path::Path,
|
||||
type_ref::{Mutability, TypeRef},
|
||||
};
|
||||
|
||||
pub(super) fn lower(
|
||||
db: &impl DefDatabase2,
|
||||
resolver: MacroResolver,
|
||||
file_id: HirFileId,
|
||||
params: Option<ast::ParamList>,
|
||||
body: Option<ast::Expr>,
|
||||
) -> (Body, BodySourceMap) {
|
||||
ExprCollector {
|
||||
resolver,
|
||||
db,
|
||||
original_file_id: file_id,
|
||||
current_file_id: file_id,
|
||||
source_map: BodySourceMap::default(),
|
||||
body: Body {
|
||||
exprs: Arena::default(),
|
||||
pats: Arena::default(),
|
||||
params: Vec::new(),
|
||||
body_expr: ExprId::dummy(),
|
||||
},
|
||||
}
|
||||
.collect(params, body)
|
||||
}
|
||||
|
||||
struct ExprCollector<DB> {
|
||||
db: DB,
|
||||
resolver: MacroResolver,
|
||||
original_file_id: HirFileId,
|
||||
current_file_id: HirFileId,
|
||||
|
||||
body: Body,
|
||||
source_map: BodySourceMap,
|
||||
}
|
||||
|
||||
impl<'a, DB> ExprCollector<&'a DB>
|
||||
where
|
||||
DB: DefDatabase2,
|
||||
{
|
||||
fn collect(
|
||||
mut self,
|
||||
param_list: Option<ast::ParamList>,
|
||||
body: Option<ast::Expr>,
|
||||
) -> (Body, BodySourceMap) {
|
||||
if let Some(param_list) = param_list {
|
||||
if let Some(self_param) = param_list.self_param() {
|
||||
let ptr = AstPtr::new(&self_param);
|
||||
let param_pat = self.alloc_pat(
|
||||
Pat::Bind {
|
||||
name: name::SELF_PARAM,
|
||||
mode: BindingAnnotation::Unannotated,
|
||||
subpat: None,
|
||||
},
|
||||
Either::B(ptr),
|
||||
);
|
||||
self.body.params.push(param_pat);
|
||||
}
|
||||
|
||||
for param in param_list.params() {
|
||||
let pat = match param.pat() {
|
||||
None => continue,
|
||||
Some(pat) => pat,
|
||||
};
|
||||
let param_pat = self.collect_pat(pat);
|
||||
self.body.params.push(param_pat);
|
||||
}
|
||||
};
|
||||
|
||||
self.body.body_expr = self.collect_expr_opt(body);
|
||||
(self.body, self.source_map)
|
||||
}
|
||||
|
||||
fn alloc_expr(&mut self, expr: Expr, ptr: AstPtr<ast::Expr>) -> ExprId {
|
||||
let ptr = Either::A(ptr);
|
||||
let id = self.body.exprs.alloc(expr);
|
||||
if self.current_file_id == self.original_file_id {
|
||||
self.source_map.expr_map.insert(ptr, id);
|
||||
}
|
||||
self.source_map
|
||||
.expr_map_back
|
||||
.insert(id, Source { file_id: self.current_file_id, ast: ptr });
|
||||
id
|
||||
}
|
||||
// desugared exprs don't have ptr, that's wrong and should be fixed
|
||||
// somehow.
|
||||
fn alloc_expr_desugared(&mut self, expr: Expr) -> ExprId {
|
||||
self.body.exprs.alloc(expr)
|
||||
}
|
||||
fn alloc_expr_field_shorthand(&mut self, expr: Expr, ptr: AstPtr<ast::RecordField>) -> ExprId {
|
||||
let ptr = Either::B(ptr);
|
||||
let id = self.body.exprs.alloc(expr);
|
||||
if self.current_file_id == self.original_file_id {
|
||||
self.source_map.expr_map.insert(ptr, id);
|
||||
}
|
||||
self.source_map
|
||||
.expr_map_back
|
||||
.insert(id, Source { file_id: self.current_file_id, ast: ptr });
|
||||
id
|
||||
}
|
||||
fn alloc_pat(&mut self, pat: Pat, ptr: PatPtr) -> PatId {
|
||||
let id = self.body.pats.alloc(pat);
|
||||
if self.current_file_id == self.original_file_id {
|
||||
self.source_map.pat_map.insert(ptr, id);
|
||||
}
|
||||
self.source_map.pat_map_back.insert(id, Source { file_id: self.current_file_id, ast: ptr });
|
||||
id
|
||||
}
|
||||
|
||||
fn empty_block(&mut self) -> ExprId {
|
||||
let block = Expr::Block { statements: Vec::new(), tail: None };
|
||||
self.body.exprs.alloc(block)
|
||||
}
|
||||
|
||||
fn missing_expr(&mut self) -> ExprId {
|
||||
self.body.exprs.alloc(Expr::Missing)
|
||||
}
|
||||
|
||||
fn missing_pat(&mut self) -> PatId {
|
||||
self.body.pats.alloc(Pat::Missing)
|
||||
}
|
||||
|
||||
fn collect_expr(&mut self, expr: ast::Expr) -> ExprId {
|
||||
let syntax_ptr = AstPtr::new(&expr);
|
||||
match expr {
|
||||
ast::Expr::IfExpr(e) => {
|
||||
let then_branch = self.collect_block_opt(e.then_branch());
|
||||
|
||||
let else_branch = e.else_branch().map(|b| match b {
|
||||
ast::ElseBranch::Block(it) => self.collect_block(it),
|
||||
ast::ElseBranch::IfExpr(elif) => {
|
||||
let expr: ast::Expr = ast::Expr::cast(elif.syntax().clone()).unwrap();
|
||||
self.collect_expr(expr)
|
||||
}
|
||||
});
|
||||
|
||||
let condition = match e.condition() {
|
||||
None => self.missing_expr(),
|
||||
Some(condition) => match condition.pat() {
|
||||
None => self.collect_expr_opt(condition.expr()),
|
||||
// if let -- desugar to match
|
||||
Some(pat) => {
|
||||
let pat = self.collect_pat(pat);
|
||||
let match_expr = self.collect_expr_opt(condition.expr());
|
||||
let placeholder_pat = self.missing_pat();
|
||||
let arms = vec![
|
||||
MatchArm { pats: vec![pat], expr: then_branch, guard: None },
|
||||
MatchArm {
|
||||
pats: vec![placeholder_pat],
|
||||
expr: else_branch.unwrap_or_else(|| self.empty_block()),
|
||||
guard: None,
|
||||
},
|
||||
];
|
||||
return self
|
||||
.alloc_expr(Expr::Match { expr: match_expr, arms }, syntax_ptr);
|
||||
}
|
||||
},
|
||||
};
|
||||
|
||||
self.alloc_expr(Expr::If { condition, then_branch, else_branch }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::TryBlockExpr(e) => {
|
||||
let body = self.collect_block_opt(e.body());
|
||||
self.alloc_expr(Expr::TryBlock { body }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::BlockExpr(e) => self.collect_block(e),
|
||||
ast::Expr::LoopExpr(e) => {
|
||||
let body = self.collect_block_opt(e.loop_body());
|
||||
self.alloc_expr(Expr::Loop { body }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::WhileExpr(e) => {
|
||||
let body = self.collect_block_opt(e.loop_body());
|
||||
|
||||
let condition = match e.condition() {
|
||||
None => self.missing_expr(),
|
||||
Some(condition) => match condition.pat() {
|
||||
None => self.collect_expr_opt(condition.expr()),
|
||||
// if let -- desugar to match
|
||||
Some(pat) => {
|
||||
let pat = self.collect_pat(pat);
|
||||
let match_expr = self.collect_expr_opt(condition.expr());
|
||||
let placeholder_pat = self.missing_pat();
|
||||
let break_ = self.alloc_expr_desugared(Expr::Break { expr: None });
|
||||
let arms = vec![
|
||||
MatchArm { pats: vec![pat], expr: body, guard: None },
|
||||
MatchArm { pats: vec![placeholder_pat], expr: break_, guard: None },
|
||||
];
|
||||
let match_expr =
|
||||
self.alloc_expr_desugared(Expr::Match { expr: match_expr, arms });
|
||||
return self.alloc_expr(Expr::Loop { body: match_expr }, syntax_ptr);
|
||||
}
|
||||
},
|
||||
};
|
||||
|
||||
self.alloc_expr(Expr::While { condition, body }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::ForExpr(e) => {
|
||||
let iterable = self.collect_expr_opt(e.iterable());
|
||||
let pat = self.collect_pat_opt(e.pat());
|
||||
let body = self.collect_block_opt(e.loop_body());
|
||||
self.alloc_expr(Expr::For { iterable, pat, body }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::CallExpr(e) => {
|
||||
let callee = self.collect_expr_opt(e.expr());
|
||||
let args = if let Some(arg_list) = e.arg_list() {
|
||||
arg_list.args().map(|e| self.collect_expr(e)).collect()
|
||||
} else {
|
||||
Vec::new()
|
||||
};
|
||||
self.alloc_expr(Expr::Call { callee, args }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::MethodCallExpr(e) => {
|
||||
let receiver = self.collect_expr_opt(e.expr());
|
||||
let args = if let Some(arg_list) = e.arg_list() {
|
||||
arg_list.args().map(|e| self.collect_expr(e)).collect()
|
||||
} else {
|
||||
Vec::new()
|
||||
};
|
||||
let method_name = e.name_ref().map(|nr| nr.as_name()).unwrap_or_else(Name::missing);
|
||||
let generic_args = e.type_arg_list().and_then(GenericArgs::from_ast);
|
||||
self.alloc_expr(
|
||||
Expr::MethodCall { receiver, method_name, args, generic_args },
|
||||
syntax_ptr,
|
||||
)
|
||||
}
|
||||
ast::Expr::MatchExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
let arms = if let Some(match_arm_list) = e.match_arm_list() {
|
||||
match_arm_list
|
||||
.arms()
|
||||
.map(|arm| MatchArm {
|
||||
pats: arm.pats().map(|p| self.collect_pat(p)).collect(),
|
||||
expr: self.collect_expr_opt(arm.expr()),
|
||||
guard: arm
|
||||
.guard()
|
||||
.and_then(|guard| guard.expr())
|
||||
.map(|e| self.collect_expr(e)),
|
||||
})
|
||||
.collect()
|
||||
} else {
|
||||
Vec::new()
|
||||
};
|
||||
self.alloc_expr(Expr::Match { expr, arms }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::PathExpr(e) => {
|
||||
let path = e
|
||||
.path()
|
||||
.and_then(|path| self.parse_path(path))
|
||||
.map(Expr::Path)
|
||||
.unwrap_or(Expr::Missing);
|
||||
self.alloc_expr(path, syntax_ptr)
|
||||
}
|
||||
ast::Expr::ContinueExpr(_e) => {
|
||||
// FIXME: labels
|
||||
self.alloc_expr(Expr::Continue, syntax_ptr)
|
||||
}
|
||||
ast::Expr::BreakExpr(e) => {
|
||||
let expr = e.expr().map(|e| self.collect_expr(e));
|
||||
self.alloc_expr(Expr::Break { expr }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::ParenExpr(e) => {
|
||||
let inner = self.collect_expr_opt(e.expr());
|
||||
// make the paren expr point to the inner expression as well
|
||||
self.source_map.expr_map.insert(Either::A(syntax_ptr), inner);
|
||||
inner
|
||||
}
|
||||
ast::Expr::ReturnExpr(e) => {
|
||||
let expr = e.expr().map(|e| self.collect_expr(e));
|
||||
self.alloc_expr(Expr::Return { expr }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::RecordLit(e) => {
|
||||
let path = e.path().and_then(|path| self.parse_path(path));
|
||||
let mut field_ptrs = Vec::new();
|
||||
let record_lit = if let Some(nfl) = e.record_field_list() {
|
||||
let fields = nfl
|
||||
.fields()
|
||||
.inspect(|field| field_ptrs.push(AstPtr::new(field)))
|
||||
.map(|field| RecordLitField {
|
||||
name: field
|
||||
.name_ref()
|
||||
.map(|nr| nr.as_name())
|
||||
.unwrap_or_else(Name::missing),
|
||||
expr: if let Some(e) = field.expr() {
|
||||
self.collect_expr(e)
|
||||
} else if let Some(nr) = field.name_ref() {
|
||||
// field shorthand
|
||||
self.alloc_expr_field_shorthand(
|
||||
Expr::Path(Path::from_name_ref(&nr)),
|
||||
AstPtr::new(&field),
|
||||
)
|
||||
} else {
|
||||
self.missing_expr()
|
||||
},
|
||||
})
|
||||
.collect();
|
||||
let spread = nfl.spread().map(|s| self.collect_expr(s));
|
||||
Expr::RecordLit { path, fields, spread }
|
||||
} else {
|
||||
Expr::RecordLit { path, fields: Vec::new(), spread: None }
|
||||
};
|
||||
|
||||
let res = self.alloc_expr(record_lit, syntax_ptr);
|
||||
for (i, ptr) in field_ptrs.into_iter().enumerate() {
|
||||
self.source_map.field_map.insert((res, i), ptr);
|
||||
}
|
||||
res
|
||||
}
|
||||
ast::Expr::FieldExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
let name = match e.field_access() {
|
||||
Some(kind) => kind.as_name(),
|
||||
_ => Name::missing(),
|
||||
};
|
||||
self.alloc_expr(Expr::Field { expr, name }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::AwaitExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
self.alloc_expr(Expr::Await { expr }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::TryExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
self.alloc_expr(Expr::Try { expr }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::CastExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
let type_ref = TypeRef::from_ast_opt(e.type_ref());
|
||||
self.alloc_expr(Expr::Cast { expr, type_ref }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::RefExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
let mutability = Mutability::from_mutable(e.is_mut());
|
||||
self.alloc_expr(Expr::Ref { expr, mutability }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::PrefixExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
if let Some(op) = e.op_kind() {
|
||||
self.alloc_expr(Expr::UnaryOp { expr, op }, syntax_ptr)
|
||||
} else {
|
||||
self.alloc_expr(Expr::Missing, syntax_ptr)
|
||||
}
|
||||
}
|
||||
ast::Expr::LambdaExpr(e) => {
|
||||
let mut args = Vec::new();
|
||||
let mut arg_types = Vec::new();
|
||||
if let Some(pl) = e.param_list() {
|
||||
for param in pl.params() {
|
||||
let pat = self.collect_pat_opt(param.pat());
|
||||
let type_ref = param.ascribed_type().map(TypeRef::from_ast);
|
||||
args.push(pat);
|
||||
arg_types.push(type_ref);
|
||||
}
|
||||
}
|
||||
let body = self.collect_expr_opt(e.body());
|
||||
self.alloc_expr(Expr::Lambda { args, arg_types, body }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::BinExpr(e) => {
|
||||
let lhs = self.collect_expr_opt(e.lhs());
|
||||
let rhs = self.collect_expr_opt(e.rhs());
|
||||
let op = e.op_kind().map(BinaryOp::from);
|
||||
self.alloc_expr(Expr::BinaryOp { lhs, rhs, op }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::TupleExpr(e) => {
|
||||
let exprs = e.exprs().map(|expr| self.collect_expr(expr)).collect();
|
||||
self.alloc_expr(Expr::Tuple { exprs }, syntax_ptr)
|
||||
}
|
||||
ast::Expr::BoxExpr(e) => {
|
||||
let expr = self.collect_expr_opt(e.expr());
|
||||
self.alloc_expr(Expr::Box { expr }, syntax_ptr)
|
||||
}
|
||||
|
||||
ast::Expr::ArrayExpr(e) => {
|
||||
let kind = e.kind();
|
||||
|
||||
match kind {
|
||||
ArrayExprKind::ElementList(e) => {
|
||||
let exprs = e.map(|expr| self.collect_expr(expr)).collect();
|
||||
self.alloc_expr(Expr::Array(Array::ElementList(exprs)), syntax_ptr)
|
||||
}
|
||||
ArrayExprKind::Repeat { initializer, repeat } => {
|
||||
let initializer = self.collect_expr_opt(initializer);
|
||||
let repeat = self.collect_expr_opt(repeat);
|
||||
self.alloc_expr(
|
||||
Expr::Array(Array::Repeat { initializer, repeat }),
|
||||
syntax_ptr,
|
||||
)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ast::Expr::Literal(e) => {
|
||||
let lit = match e.kind() {
|
||||
LiteralKind::IntNumber { suffix } => {
|
||||
let known_name = suffix.and_then(|it| BuiltinInt::from_suffix(&it));
|
||||
|
||||
Literal::Int(Default::default(), known_name)
|
||||
}
|
||||
LiteralKind::FloatNumber { suffix } => {
|
||||
let known_name = suffix.and_then(|it| BuiltinFloat::from_suffix(&it));
|
||||
|
||||
Literal::Float(Default::default(), known_name)
|
||||
}
|
||||
LiteralKind::ByteString => Literal::ByteString(Default::default()),
|
||||
LiteralKind::String => Literal::String(Default::default()),
|
||||
LiteralKind::Byte => Literal::Int(Default::default(), Some(BuiltinInt::U8)),
|
||||
LiteralKind::Bool => Literal::Bool(Default::default()),
|
||||
LiteralKind::Char => Literal::Char(Default::default()),
|
||||
};
|
||||
self.alloc_expr(Expr::Literal(lit), syntax_ptr)
|
||||
}
|
||||
ast::Expr::IndexExpr(e) => {
|
||||
let base = self.collect_expr_opt(e.base());
|
||||
let index = self.collect_expr_opt(e.index());
|
||||
self.alloc_expr(Expr::Index { base, index }, syntax_ptr)
|
||||
}
|
||||
|
||||
// FIXME implement HIR for these:
|
||||
ast::Expr::Label(_e) => self.alloc_expr(Expr::Missing, syntax_ptr),
|
||||
ast::Expr::RangeExpr(_e) => self.alloc_expr(Expr::Missing, syntax_ptr),
|
||||
ast::Expr::MacroCall(e) => {
|
||||
let ast_id = AstId::new(
|
||||
self.current_file_id,
|
||||
self.db.ast_id_map(self.current_file_id).ast_id(&e),
|
||||
);
|
||||
|
||||
if let Some(path) = e.path().and_then(|path| self.parse_path(path)) {
|
||||
if let Some(def) = self.resolver.resolve_path_as_macro(self.db, &path) {
|
||||
let call_id = self.db.intern_macro(MacroCallLoc { def, ast_id });
|
||||
let file_id = call_id.as_file(MacroFileKind::Expr);
|
||||
if let Some(node) = self.db.parse_or_expand(file_id) {
|
||||
if let Some(expr) = ast::Expr::cast(node) {
|
||||
log::debug!("macro expansion {:#?}", expr.syntax());
|
||||
let old_file_id =
|
||||
std::mem::replace(&mut self.current_file_id, file_id);
|
||||
let id = self.collect_expr(expr);
|
||||
self.current_file_id = old_file_id;
|
||||
return id;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// FIXME: Instead of just dropping the error from expansion
|
||||
// report it
|
||||
self.alloc_expr(Expr::Missing, syntax_ptr)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn collect_expr_opt(&mut self, expr: Option<ast::Expr>) -> ExprId {
|
||||
if let Some(expr) = expr {
|
||||
self.collect_expr(expr)
|
||||
} else {
|
||||
self.missing_expr()
|
||||
}
|
||||
}
|
||||
|
||||
fn collect_block(&mut self, expr: ast::BlockExpr) -> ExprId {
|
||||
let syntax_node_ptr = AstPtr::new(&expr.clone().into());
|
||||
let block = match expr.block() {
|
||||
Some(block) => block,
|
||||
None => return self.alloc_expr(Expr::Missing, syntax_node_ptr),
|
||||
};
|
||||
let statements = block
|
||||
.statements()
|
||||
.map(|s| match s {
|
||||
ast::Stmt::LetStmt(stmt) => {
|
||||
let pat = self.collect_pat_opt(stmt.pat());
|
||||
let type_ref = stmt.ascribed_type().map(TypeRef::from_ast);
|
||||
let initializer = stmt.initializer().map(|e| self.collect_expr(e));
|
||||
Statement::Let { pat, type_ref, initializer }
|
||||
}
|
||||
ast::Stmt::ExprStmt(stmt) => Statement::Expr(self.collect_expr_opt(stmt.expr())),
|
||||
})
|
||||
.collect();
|
||||
let tail = block.expr().map(|e| self.collect_expr(e));
|
||||
self.alloc_expr(Expr::Block { statements, tail }, syntax_node_ptr)
|
||||
}
|
||||
|
||||
fn collect_block_opt(&mut self, expr: Option<ast::BlockExpr>) -> ExprId {
|
||||
if let Some(block) = expr {
|
||||
self.collect_block(block)
|
||||
} else {
|
||||
self.missing_expr()
|
||||
}
|
||||
}
|
||||
|
||||
fn collect_pat(&mut self, pat: ast::Pat) -> PatId {
|
||||
let pattern = match &pat {
|
||||
ast::Pat::BindPat(bp) => {
|
||||
let name = bp.name().map(|nr| nr.as_name()).unwrap_or_else(Name::missing);
|
||||
let annotation = BindingAnnotation::new(bp.is_mutable(), bp.is_ref());
|
||||
let subpat = bp.pat().map(|subpat| self.collect_pat(subpat));
|
||||
Pat::Bind { name, mode: annotation, subpat }
|
||||
}
|
||||
ast::Pat::TupleStructPat(p) => {
|
||||
let path = p.path().and_then(|path| self.parse_path(path));
|
||||
let args = p.args().map(|p| self.collect_pat(p)).collect();
|
||||
Pat::TupleStruct { path, args }
|
||||
}
|
||||
ast::Pat::RefPat(p) => {
|
||||
let pat = self.collect_pat_opt(p.pat());
|
||||
let mutability = Mutability::from_mutable(p.is_mut());
|
||||
Pat::Ref { pat, mutability }
|
||||
}
|
||||
ast::Pat::PathPat(p) => {
|
||||
let path = p.path().and_then(|path| self.parse_path(path));
|
||||
path.map(Pat::Path).unwrap_or(Pat::Missing)
|
||||
}
|
||||
ast::Pat::TuplePat(p) => {
|
||||
let args = p.args().map(|p| self.collect_pat(p)).collect();
|
||||
Pat::Tuple(args)
|
||||
}
|
||||
ast::Pat::PlaceholderPat(_) => Pat::Wild,
|
||||
ast::Pat::RecordPat(p) => {
|
||||
let path = p.path().and_then(|path| self.parse_path(path));
|
||||
let record_field_pat_list =
|
||||
p.record_field_pat_list().expect("every struct should have a field list");
|
||||
let mut fields: Vec<_> = record_field_pat_list
|
||||
.bind_pats()
|
||||
.filter_map(|bind_pat| {
|
||||
let ast_pat =
|
||||
ast::Pat::cast(bind_pat.syntax().clone()).expect("bind pat is a pat");
|
||||
let pat = self.collect_pat(ast_pat);
|
||||
let name = bind_pat.name()?.as_name();
|
||||
Some(RecordFieldPat { name, pat })
|
||||
})
|
||||
.collect();
|
||||
let iter = record_field_pat_list.record_field_pats().filter_map(|f| {
|
||||
let ast_pat = f.pat()?;
|
||||
let pat = self.collect_pat(ast_pat);
|
||||
let name = f.name()?.as_name();
|
||||
Some(RecordFieldPat { name, pat })
|
||||
});
|
||||
fields.extend(iter);
|
||||
|
||||
Pat::Record { path, args: fields }
|
||||
}
|
||||
|
||||
// FIXME: implement
|
||||
ast::Pat::DotDotPat(_) => Pat::Missing,
|
||||
ast::Pat::BoxPat(_) => Pat::Missing,
|
||||
ast::Pat::LiteralPat(_) => Pat::Missing,
|
||||
ast::Pat::SlicePat(_) | ast::Pat::RangePat(_) => Pat::Missing,
|
||||
};
|
||||
let ptr = AstPtr::new(&pat);
|
||||
self.alloc_pat(pattern, Either::A(ptr))
|
||||
}
|
||||
|
||||
fn collect_pat_opt(&mut self, pat: Option<ast::Pat>) -> PatId {
|
||||
if let Some(pat) = pat {
|
||||
self.collect_pat(pat)
|
||||
} else {
|
||||
self.missing_pat()
|
||||
}
|
||||
}
|
||||
|
||||
fn parse_path(&mut self, path: ast::Path) -> Option<Path> {
|
||||
let hygiene = Hygiene::new(self.db, self.current_file_id);
|
||||
Path::from_src(path, &hygiene)
|
||||
}
|
||||
}
|
||||
|
||||
impl From<ast::BinOp> for BinaryOp {
|
||||
fn from(ast_op: ast::BinOp) -> Self {
|
||||
|
||||
@ -9,6 +9,8 @@
|
||||
//! 3. Unresolved. Paths are stored as sequences of names, and not as defs the
|
||||
//! names refer to.
|
||||
//! 4. Desugared. There's no `if let`.
|
||||
//!
|
||||
//! See also a neighboring `body` module.
|
||||
|
||||
use hir_expand::name::Name;
|
||||
use ra_arena::{impl_arena_id, RawId};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user