//! Transforms `ast::Expr` into an equivalent `hir_def::expr::Expr`
//! representation.
-use std::mem;
+use std::{mem, sync::Arc};
use either::Either;
use hir_expand::{
+ ast_id_map::{AstIdMap, FileAstId},
hygiene::Hygiene,
name::{name, AsName, Name},
- ExpandError, HirFileId,
+ ExpandError, HirFileId, InFile,
};
use la_arena::Arena;
use profile::Count;
use crate::{
adt::StructKind,
body::{Body, BodySourceMap, Expander, LabelSource, PatPtr, SyntheticSyntax},
+ body::{BodyDiagnostic, ExprSource, PatSource},
builtin_type::{BuiltinFloat, BuiltinInt, BuiltinUint},
db::DefDatabase,
- diagnostics::{InactiveCode, MacroError, UnresolvedProcMacro},
expr::{
dummy_expr_id, ArithOp, Array, BinaryOp, BindingAnnotation, CmpOp, Expr, ExprId, Label,
LabelId, Literal, LogicOp, MatchArm, Ordering, Pat, PatId, RecordFieldPat, RecordLitField,
Statement,
},
+ intern::Interned,
item_scope::BuiltinShadowMode,
path::{GenericArgs, Path},
type_ref::{Mutability, Rawness, TypeRef},
- AdtId, BlockLoc, ModuleDefId,
+ AdtId, BlockLoc, ModuleDefId, UnresolvedMacro,
};
-use super::{diagnostics::BodyDiagnostic, ExprSource, PatSource};
-
-pub(crate) struct LowerCtx {
+pub struct LowerCtx<'a> {
+ pub db: &'a dyn DefDatabase,
hygiene: Hygiene,
+ file_id: Option<HirFileId>,
+ source_ast_id_map: Option<Arc<AstIdMap>>,
}
-impl LowerCtx {
- pub(crate) fn new(db: &dyn DefDatabase, file_id: HirFileId) -> Self {
- LowerCtx { hygiene: Hygiene::new(db.upcast(), file_id) }
+impl<'a> LowerCtx<'a> {
+ pub fn new(db: &'a dyn DefDatabase, file_id: HirFileId) -> Self {
+ LowerCtx {
+ db,
+ hygiene: Hygiene::new(db.upcast(), file_id),
+ file_id: Some(file_id),
+ source_ast_id_map: Some(db.ast_id_map(file_id)),
+ }
+ }
+
+ pub fn with_hygiene(db: &'a dyn DefDatabase, hygiene: &Hygiene) -> Self {
+ LowerCtx { db, hygiene: hygiene.clone(), file_id: None, source_ast_id_map: None }
+ }
+
+ pub(crate) fn hygiene(&self) -> &Hygiene {
+ &self.hygiene
}
- pub(crate) fn with_hygiene(hygiene: &Hygiene) -> Self {
- LowerCtx { hygiene: hygiene.clone() }
+
+ pub(crate) fn file_id(&self) -> HirFileId {
+ self.file_id.unwrap()
}
pub(crate) fn lower_path(&self, ast: ast::Path) -> Option<Path> {
- Path::from_src(ast, &self.hygiene)
+ Path::from_src(ast, self)
+ }
+
+ pub(crate) fn ast_id<N: AstNode>(&self, item: &N) -> Option<FileAstId<N>> {
+ self.source_ast_id_map.as_ref().map(|ast_id_map| ast_id_map.ast_id(item))
}
}
_c: Count::new(),
},
expander,
+ statements_in_scope: Vec::new(),
}
.collect(params, body)
}
expander: Expander,
body: Body,
source_map: BodySourceMap,
+ statements_in_scope: Vec<Statement>,
}
impl ExprCollector<'_> {
(self.body, self.source_map)
}
- fn ctx(&self) -> LowerCtx {
+ fn ctx(&self) -> LowerCtx<'_> {
LowerCtx::new(self.db, self.expander.current_file_id)
}
}
fn collect_expr(&mut self, expr: ast::Expr) -> ExprId {
+ self.maybe_collect_expr(expr).unwrap_or_else(|| self.missing_expr())
+ }
+
+ /// Returns `None` if and only if the expression is `#[cfg]`d out.
+ fn maybe_collect_expr(&mut self, expr: ast::Expr) -> Option<ExprId> {
let syntax_ptr = AstPtr::new(&expr);
- if self.check_cfg(&expr).is_none() {
- return self.missing_expr();
- }
+ self.check_cfg(&expr)?;
- match expr {
+ Some(match expr {
ast::Expr::IfExpr(e) => {
let then_branch = self.collect_block_opt(e.then_branch());
guard: None,
},
];
- return self
- .alloc_expr(Expr::Match { expr: match_expr, arms }, syntax_ptr);
+ return Some(
+ self.alloc_expr(Expr::Match { expr: match_expr, arms }, syntax_ptr),
+ );
}
},
};
];
let match_expr =
self.alloc_expr_desugared(Expr::Match { expr: match_expr, arms });
- return self
- .alloc_expr(Expr::Loop { body: match_expr, label }, syntax_ptr);
+ return Some(
+ self.alloc_expr(Expr::Loop { body: match_expr, label }, 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()
+ arg_list.args().filter_map(|e| self.maybe_collect_expr(e)).collect()
} else {
Vec::new()
};
ast::Expr::MethodCallExpr(e) => {
let receiver = self.collect_expr_opt(e.receiver());
let args = if let Some(arg_list) = e.arg_list() {
- arg_list.args().map(|e| self.collect_expr(e)).collect()
+ arg_list.args().filter_map(|e| self.maybe_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.generic_arg_list().and_then(|it| GenericArgs::from_ast(&self.ctx(), it));
+ let generic_args = e
+ .generic_arg_list()
+ .and_then(|it| GenericArgs::from_ast(&self.ctx(), it))
+ .map(Box::new);
self.alloc_expr(
Expr::MethodCall { receiver, method_name, args, generic_args },
syntax_ptr,
ast::Expr::PathExpr(e) => {
let path = e
.path()
- .and_then(|path| self.expander.parse_path(path))
+ .and_then(|path| self.expander.parse_path(self.db, path))
.map(Expr::Path)
.unwrap_or(Expr::Missing);
self.alloc_expr(path, syntax_ptr)
self.alloc_expr(Expr::Yield { expr }, syntax_ptr)
}
ast::Expr::RecordExpr(e) => {
- let path = e.path().and_then(|path| self.expander.parse_path(path));
+ let path =
+ e.path().and_then(|path| self.expander.parse_path(self.db, path)).map(Box::new);
let record_lit = if let Some(nfl) = e.record_expr_field_list() {
let fields = nfl
.fields()
}
ast::Expr::CastExpr(e) => {
let expr = self.collect_expr_opt(e.expr());
- let type_ref = TypeRef::from_ast_opt(&self.ctx(), e.ty());
+ let type_ref = Interned::new(TypeRef::from_ast_opt(&self.ctx(), e.ty()));
self.alloc_expr(Expr::Cast { expr, type_ref }, syntax_ptr)
}
ast::Expr::RefExpr(e) => {
if let Some(pl) = e.param_list() {
for param in pl.params() {
let pat = self.collect_pat_opt(param.pat());
- let type_ref = param.ty().map(|it| TypeRef::from_ast(&self.ctx(), it));
+ let type_ref =
+ param.ty().map(|it| Interned::new(TypeRef::from_ast(&self.ctx(), it)));
args.push(pat);
arg_types.push(type_ref);
}
}
- let ret_type =
- e.ret_type().and_then(|r| r.ty()).map(|it| TypeRef::from_ast(&self.ctx(), it));
+ let ret_type = e
+ .ret_type()
+ .and_then(|r| r.ty())
+ .map(|it| Interned::new(TypeRef::from_ast(&self.ctx(), it)));
let body = self.collect_expr_opt(e.body());
self.alloc_expr(Expr::Lambda { args, arg_types, ret_type, body }, syntax_ptr)
}
}
}
ast::Expr::MacroCall(e) => {
+ let macro_ptr = AstPtr::new(&e);
let mut ids = vec![];
- self.collect_macro_call(e, syntax_ptr.clone(), true, |this, expansion| {
+ self.collect_macro_call(e, macro_ptr, true, |this, expansion| {
ids.push(match expansion {
Some(it) => this.collect_expr(it),
None => this.alloc_expr(Expr::Missing, syntax_ptr.clone()),
ids[0]
}
ast::Expr::MacroStmts(e) => {
- // FIXME: these statements should be held by some hir containter
- for stmt in e.statements() {
- self.collect_stmt(stmt);
- }
- if let Some(expr) = e.expr() {
- self.collect_expr(expr)
- } else {
- self.alloc_expr(Expr::Missing, syntax_ptr)
- }
+ e.statements().for_each(|s| self.collect_stmt(s));
+ let tail = e
+ .expr()
+ .map(|e| self.collect_expr(e))
+ .unwrap_or_else(|| self.alloc_expr(Expr::Missing, syntax_ptr.clone()));
+
+ self.alloc_expr(Expr::MacroStmts { tail }, syntax_ptr)
}
- }
+ })
}
fn collect_macro_call<F: FnMut(&mut Self, Option<T>), T: ast::AstNode>(
&mut self,
e: ast::MacroCall,
- syntax_ptr: AstPtr<ast::Expr>,
+ syntax_ptr: AstPtr<ast::MacroCall>,
is_error_recoverable: bool,
mut collector: F,
) {
let macro_call = self.expander.to_source(AstPtr::new(&e));
let res = self.expander.enter_expand(self.db, e);
+ let res = match res {
+ Ok(res) => res,
+ Err(UnresolvedMacro { path }) => {
+ self.source_map.diagnostics.push(BodyDiagnostic::UnresolvedMacroCall {
+ node: InFile::new(outer_file, syntax_ptr),
+ path,
+ });
+ collector(self, None);
+ return;
+ }
+ };
+
match &res.err {
Some(ExpandError::UnresolvedProcMacro) => {
- self.source_map.diagnostics.push(BodyDiagnostic::UnresolvedProcMacro(
- UnresolvedProcMacro {
- file: outer_file,
- node: syntax_ptr.into(),
- precise_location: None,
- macro_name: None,
- },
- ));
+ self.source_map.diagnostics.push(BodyDiagnostic::UnresolvedProcMacro {
+ node: InFile::new(outer_file, syntax_ptr),
+ });
}
Some(err) => {
- self.source_map.diagnostics.push(BodyDiagnostic::MacroError(MacroError {
- file: outer_file,
- node: syntax_ptr.into(),
+ self.source_map.diagnostics.push(BodyDiagnostic::MacroError {
+ node: InFile::new(outer_file, syntax_ptr),
message: err.to_string(),
- }));
+ });
}
None => {}
}
}
}
- fn collect_stmt(&mut self, s: ast::Stmt) -> Option<Vec<Statement>> {
- let stmt = match s {
+ fn collect_stmt(&mut self, s: ast::Stmt) {
+ match s {
ast::Stmt::LetStmt(stmt) => {
- self.check_cfg(&stmt)?;
-
+ if self.check_cfg(&stmt).is_none() {
+ return;
+ }
let pat = self.collect_pat_opt(stmt.pat());
- let type_ref = stmt.ty().map(|it| TypeRef::from_ast(&self.ctx(), it));
+ let type_ref =
+ stmt.ty().map(|it| Interned::new(TypeRef::from_ast(&self.ctx(), it)));
let initializer = stmt.initializer().map(|e| self.collect_expr(e));
- vec![Statement::Let { pat, type_ref, initializer }]
+ self.statements_in_scope.push(Statement::Let { pat, type_ref, initializer });
}
ast::Stmt::ExprStmt(stmt) => {
- self.check_cfg(&stmt)?;
-
+ if self.check_cfg(&stmt).is_none() {
+ return;
+ }
+ let has_semi = stmt.semicolon_token().is_some();
// Note that macro could be expended to multiple statements
if let Some(ast::Expr::MacroCall(m)) = stmt.expr() {
+ let macro_ptr = AstPtr::new(&m);
let syntax_ptr = AstPtr::new(&stmt.expr().unwrap());
- let mut stmts = vec![];
- self.collect_macro_call(m, syntax_ptr.clone(), false, |this, expansion| {
- match expansion {
+ self.collect_macro_call(
+ m,
+ macro_ptr,
+ false,
+ |this, expansion| match expansion {
Some(expansion) => {
let statements: ast::MacroStmts = expansion;
- statements.statements().for_each(|stmt| {
- if let Some(mut r) = this.collect_stmt(stmt) {
- stmts.append(&mut r);
- }
- });
+ statements.statements().for_each(|stmt| this.collect_stmt(stmt));
if let Some(expr) = statements.expr() {
- stmts.push(Statement::Expr(this.collect_expr(expr)));
+ let expr = this.collect_expr(expr);
+ this.statements_in_scope
+ .push(Statement::Expr { expr, has_semi });
}
}
None => {
- stmts.push(Statement::Expr(
- this.alloc_expr(Expr::Missing, syntax_ptr.clone()),
- ));
+ let expr = this.alloc_expr(Expr::Missing, syntax_ptr.clone());
+ this.statements_in_scope.push(Statement::Expr { expr, has_semi });
}
- }
- });
- stmts
+ },
+ );
} else {
- vec![Statement::Expr(self.collect_expr_opt(stmt.expr()))]
+ let expr = self.collect_expr_opt(stmt.expr());
+ self.statements_in_scope.push(Statement::Expr { expr, has_semi });
}
}
ast::Stmt::Item(item) => {
- self.check_cfg(&item)?;
-
- return None;
+ if self.check_cfg(&item).is_none() {
+ return;
+ }
}
- };
-
- Some(stmt)
+ }
}
fn collect_block(&mut self, block: ast::BlockExpr) -> ExprId {
let block_loc =
BlockLoc { ast_id, module: self.expander.def_map.module_id(self.expander.module) };
let block_id = self.db.intern_block(block_loc);
- self.body.block_scopes.push(block_id);
- let opt_def_map = self.db.block_def_map(block_id);
- let has_def_map = opt_def_map.is_some();
- let def_map = opt_def_map.unwrap_or_else(|| self.expander.def_map.clone());
- let module = if has_def_map { def_map.root() } else { self.expander.module };
+ let (module, def_map) = match self.db.block_def_map(block_id) {
+ Some(def_map) => {
+ self.body.block_scopes.push(block_id);
+ (def_map.root(), def_map)
+ }
+ None => (self.expander.module, self.expander.def_map.clone()),
+ };
let prev_def_map = mem::replace(&mut self.expander.def_map, def_map);
let prev_local_module = mem::replace(&mut self.expander.module, module);
+ let prev_statements = std::mem::take(&mut self.statements_in_scope);
- let statements =
- block.statements().filter_map(|s| self.collect_stmt(s)).flatten().collect();
- let tail = block.tail_expr().map(|e| self.collect_expr(e));
+ block.statements().for_each(|s| self.collect_stmt(s));
+ block.tail_expr().and_then(|e| {
+ let expr = self.maybe_collect_expr(e)?;
+ Some(self.statements_in_scope.push(Statement::Expr { expr, has_semi: false }))
+ });
+
+ let mut tail = None;
+ if let Some(Statement::Expr { expr, has_semi: false }) = self.statements_in_scope.last() {
+ tail = Some(*expr);
+ self.statements_in_scope.pop();
+ }
+ let tail = tail;
+ let statements = std::mem::replace(&mut self.statements_in_scope, prev_statements);
let syntax_node_ptr = AstPtr::new(&block.into());
let expr_id = self.alloc_expr(
Expr::Block { id: block_id, statements, tail, label: None },
}
}
ast::Pat::TupleStructPat(p) => {
- let path = p.path().and_then(|path| self.expander.parse_path(path));
+ let path =
+ p.path().and_then(|path| self.expander.parse_path(self.db, path)).map(Box::new);
let (args, ellipsis) = self.collect_tuple_pat(p.fields());
Pat::TupleStruct { path, args, ellipsis }
}
Pat::Ref { pat, mutability }
}
ast::Pat::PathPat(p) => {
- let path = p.path().and_then(|path| self.expander.parse_path(path));
+ let path =
+ p.path().and_then(|path| self.expander.parse_path(self.db, path)).map(Box::new);
path.map(Pat::Path).unwrap_or(Pat::Missing)
}
ast::Pat::OrPat(p) => {
}
ast::Pat::WildcardPat(_) => Pat::Wild,
ast::Pat::RecordPat(p) => {
- let path = p.path().and_then(|path| self.expander.parse_path(path));
+ let path =
+ p.path().and_then(|path| self.expander.parse_path(self.db, path)).map(Box::new);
let args: Vec<_> = p
.record_pat_field_list()
.expect("every struct should have a field list")
Pat::Missing
}
}
+ ast::Pat::MacroPat(mac) => match mac.macro_call() {
+ Some(call) => {
+ let macro_ptr = AstPtr::new(&call);
+ let mut pat = None;
+ self.collect_macro_call(call, macro_ptr, true, |this, expanded_pat| {
+ pat = Some(this.collect_pat_opt(expanded_pat));
+ });
+
+ match pat {
+ Some(pat) => return pat,
+ None => Pat::Missing,
+ }
+ }
+ None => Pat::Missing,
+ },
// FIXME: implement
- ast::Pat::RangePat(_) | ast::Pat::MacroPat(_) => Pat::Missing,
+ ast::Pat::RangePat(_) => Pat::Missing,
};
let ptr = AstPtr::new(&pat);
self.alloc_pat(pattern, Either::Left(ptr))
return Some(());
}
- self.source_map.diagnostics.push(BodyDiagnostic::InactiveCode(InactiveCode {
- file: self.expander.current_file_id,
- node: SyntaxNodePtr::new(owner.syntax()),
+ self.source_map.diagnostics.push(BodyDiagnostic::InactiveCode {
+ node: InFile::new(
+ self.expander.current_file_id,
+ SyntaxNodePtr::new(owner.syntax()),
+ ),
cfg,
opts: self.expander.cfg_options().clone(),
- }));
+ });
None
}
impl From<ast::LiteralKind> for Literal {
fn from(ast_lit_kind: ast::LiteralKind) -> Self {
match ast_lit_kind {
+ // FIXME: these should have actual values filled in, but unsure on perf impact
LiteralKind::IntNumber(lit) => {
if let builtin @ Some(_) = lit.suffix().and_then(BuiltinFloat::from_suffix) {
- return Literal::Float(Default::default(), builtin);
+ Literal::Float(Default::default(), builtin)
} else if let builtin @ Some(_) =
- lit.suffix().and_then(|it| BuiltinInt::from_suffix(&it))
+ lit.suffix().and_then(|it| BuiltinInt::from_suffix(it))
{
- Literal::Int(Default::default(), builtin)
+ Literal::Int(lit.value().unwrap_or(0) as i128, builtin)
} else {
- let builtin = lit.suffix().and_then(|it| BuiltinUint::from_suffix(&it));
- Literal::Uint(Default::default(), builtin)
+ let builtin = lit.suffix().and_then(|it| BuiltinUint::from_suffix(it));
+ Literal::Uint(lit.value().unwrap_or(0), builtin)
}
}
LiteralKind::FloatNumber(lit) => {
- let ty = lit.suffix().and_then(|it| BuiltinFloat::from_suffix(&it));
+ let ty = lit.suffix().and_then(|it| BuiltinFloat::from_suffix(it));
Literal::Float(Default::default(), ty)
}
- LiteralKind::ByteString(_) => Literal::ByteString(Default::default()),
+ LiteralKind::ByteString(bs) => {
+ let text = bs.value().map(Vec::from).unwrap_or_else(Default::default);
+ Literal::ByteString(text)
+ }
LiteralKind::String(_) => Literal::String(Default::default()),
LiteralKind::Byte => Literal::Uint(Default::default(), Some(BuiltinUint::U8)),
LiteralKind::Bool(val) => Literal::Bool(val),
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