756 lines
33 KiB
Rust
756 lines
33 KiB
Rust
//! Transforms `ast::Expr` into an equivalent `hir_def::expr::Expr`
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//! representation.
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use either::Either;
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use hir_expand::{
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name::{name, AsName, Name},
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MacroDefId, MacroDefKind,
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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, ModuleItemOwner, NameOwner,
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SlicePatComponents, 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 super::{ExprSource, PatSource};
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use crate::{
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adt::StructKind,
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body::{Body, BodySourceMap, Expander, PatPtr, SyntheticSyntax},
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builtin_type::{BuiltinFloat, BuiltinInt},
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db::DefDatabase,
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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,
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},
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item_scope::BuiltinShadowMode,
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path::GenericArgs,
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path::Path,
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type_ref::{Mutability, TypeRef},
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AdtId, ConstLoc, ContainerId, DefWithBodyId, EnumLoc, FunctionLoc, Intern, ModuleDefId,
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StaticLoc, StructLoc, TraitLoc, TypeAliasLoc, UnionLoc,
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};
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pub(super) fn lower(
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db: &impl DefDatabase,
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def: DefWithBodyId,
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expander: Expander,
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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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db,
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def,
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expander,
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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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item_scope: Default::default(),
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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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def: DefWithBodyId,
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expander: Expander,
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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: DefDatabase,
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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],
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mode: BindingAnnotation::Unannotated,
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subpat: None,
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},
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Either::Right(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::Left(ptr);
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let src = self.expander.to_source(ptr);
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let id = self.make_expr(expr, Ok(src));
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self.source_map.expr_map.insert(src, id);
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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.make_expr(expr, Err(SyntheticSyntax))
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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::Right(ptr);
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let src = self.expander.to_source(ptr);
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let id = self.make_expr(expr, Ok(src));
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self.source_map.expr_map.insert(src, id);
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id
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}
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fn empty_block(&mut self) -> ExprId {
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self.alloc_expr_desugared(Expr::Block { statements: Vec::new(), tail: None })
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}
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fn missing_expr(&mut self) -> ExprId {
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self.alloc_expr_desugared(Expr::Missing)
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}
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fn make_expr(&mut self, expr: Expr, src: Result<ExprSource, SyntheticSyntax>) -> ExprId {
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let id = self.body.exprs.alloc(expr);
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self.source_map.expr_map_back.insert(id, src);
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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 src = self.expander.to_source(ptr);
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let id = self.make_pat(pat, Ok(src));
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self.source_map.pat_map.insert(src, id);
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id
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}
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fn missing_pat(&mut self) -> PatId {
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self.make_pat(Pat::Missing, Err(SyntheticSyntax))
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}
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fn make_pat(&mut self, pat: Pat, src: Result<PatSource, SyntheticSyntax>) -> PatId {
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let id = self.body.pats.alloc(pat);
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self.source_map.pat_map_back.insert(id, src);
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id
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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 { pat, expr: then_branch, guard: None },
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MatchArm {
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pat: 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_resolve_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 { pat, expr: body, guard: None },
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MatchArm { pat: 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());
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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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let method_name = e.name_ref().map(|nr| nr.as_name()).unwrap_or_else(Name::missing);
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let generic_args = e.type_arg_list().and_then(GenericArgs::from_ast);
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self.alloc_expr(
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Expr::MethodCall { receiver, method_name, args, generic_args },
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syntax_ptr,
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)
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}
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ast::Expr::MatchExpr(e) => {
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let expr = self.collect_expr_opt(e.expr());
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let arms = if let Some(match_arm_list) = e.match_arm_list() {
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match_arm_list
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.arms()
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.map(|arm| MatchArm {
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pat: self.collect_pat_opt(arm.pat()),
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expr: self.collect_expr_opt(arm.expr()),
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guard: arm
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.guard()
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.and_then(|guard| guard.expr())
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.map(|e| self.collect_expr(e)),
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})
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.collect()
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} else {
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Vec::new()
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};
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self.alloc_expr(Expr::Match { expr, arms }, syntax_ptr)
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}
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ast::Expr::PathExpr(e) => {
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let path = e
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.path()
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.and_then(|path| self.expander.parse_path(path))
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.map(Expr::Path)
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.unwrap_or(Expr::Missing);
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self.alloc_expr(path, syntax_ptr)
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}
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ast::Expr::ContinueExpr(_e) => {
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// FIXME: labels
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self.alloc_expr(Expr::Continue, syntax_ptr)
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}
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ast::Expr::BreakExpr(e) => {
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let expr = e.expr().map(|e| self.collect_expr(e));
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self.alloc_expr(Expr::Break { expr }, syntax_ptr)
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}
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ast::Expr::ParenExpr(e) => {
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let inner = self.collect_expr_opt(e.expr());
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// make the paren expr point to the inner expression as well
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let src = self.expander.to_source(Either::Left(syntax_ptr));
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self.source_map.expr_map.insert(src, inner);
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inner
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}
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ast::Expr::ReturnExpr(e) => {
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let expr = e.expr().map(|e| self.collect_expr(e));
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self.alloc_expr(Expr::Return { expr }, syntax_ptr)
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}
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ast::Expr::RecordLit(e) => {
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let path = e.path().and_then(|path| self.expander.parse_path(path));
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let mut field_ptrs = Vec::new();
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let record_lit = if let Some(nfl) = e.record_field_list() {
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let fields = nfl
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.fields()
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.inspect(|field| field_ptrs.push(AstPtr::new(field)))
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.map(|field| RecordLitField {
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name: field
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.name_ref()
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.map(|nr| nr.as_name())
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.unwrap_or_else(Name::missing),
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expr: if let Some(e) = field.expr() {
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self.collect_expr(e)
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} else if let Some(nr) = field.name_ref() {
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// field shorthand
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self.alloc_expr_field_shorthand(
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Expr::Path(Path::from_name_ref(&nr)),
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AstPtr::new(&field),
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)
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} else {
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self.missing_expr()
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},
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})
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.collect();
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let spread = nfl.spread().map(|s| self.collect_expr(s));
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Expr::RecordLit { path, fields, spread }
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} else {
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Expr::RecordLit { path, fields: Vec::new(), spread: None }
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};
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let res = self.alloc_expr(record_lit, syntax_ptr);
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for (i, ptr) in field_ptrs.into_iter().enumerate() {
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self.source_map.field_map.insert((res, i), ptr);
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}
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res
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}
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ast::Expr::FieldExpr(e) => {
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let expr = self.collect_expr_opt(e.expr());
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let name = match e.field_access() {
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Some(kind) => kind.as_name(),
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_ => Name::missing(),
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};
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self.alloc_expr(Expr::Field { expr, name }, syntax_ptr)
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}
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ast::Expr::AwaitExpr(e) => {
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let expr = self.collect_expr_opt(e.expr());
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self.alloc_expr(Expr::Await { expr }, syntax_ptr)
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}
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ast::Expr::TryExpr(e) => {
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let expr = self.collect_expr_opt(e.expr());
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self.alloc_expr(Expr::Try { expr }, syntax_ptr)
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}
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ast::Expr::CastExpr(e) => {
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let expr = self.collect_expr_opt(e.expr());
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let type_ref = TypeRef::from_ast_opt(e.type_ref());
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self.alloc_expr(Expr::Cast { expr, type_ref }, syntax_ptr)
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}
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ast::Expr::RefExpr(e) => {
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let expr = self.collect_expr_opt(e.expr());
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let mutability = Mutability::from_mutable(e.is_mut());
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self.alloc_expr(Expr::Ref { expr, mutability }, syntax_ptr)
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}
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ast::Expr::PrefixExpr(e) => {
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let expr = self.collect_expr_opt(e.expr());
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if let Some(op) = e.op_kind() {
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self.alloc_expr(Expr::UnaryOp { expr, op }, syntax_ptr)
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} else {
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self.alloc_expr(Expr::Missing, syntax_ptr)
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}
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}
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ast::Expr::LambdaExpr(e) => {
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let mut args = Vec::new();
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let mut arg_types = Vec::new();
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if let Some(pl) = e.param_list() {
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for param in pl.params() {
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let pat = self.collect_pat_opt(param.pat());
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let type_ref = param.ascribed_type().map(TypeRef::from_ast);
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args.push(pat);
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arg_types.push(type_ref);
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}
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}
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let ret_type = e.ret_type().and_then(|r| r.type_ref()).map(TypeRef::from_ast);
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let body = self.collect_expr_opt(e.body());
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self.alloc_expr(Expr::Lambda { args, arg_types, ret_type, body }, syntax_ptr)
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}
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ast::Expr::BinExpr(e) => {
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let lhs = self.collect_expr_opt(e.lhs());
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let rhs = self.collect_expr_opt(e.rhs());
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let op = e.op_kind().map(BinaryOp::from);
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self.alloc_expr(Expr::BinaryOp { lhs, rhs, op }, syntax_ptr)
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}
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ast::Expr::TupleExpr(e) => {
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let exprs = e.exprs().map(|expr| self.collect_expr(expr)).collect();
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self.alloc_expr(Expr::Tuple { exprs }, syntax_ptr)
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}
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ast::Expr::BoxExpr(e) => {
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let expr = self.collect_expr_opt(e.expr());
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self.alloc_expr(Expr::Box { expr }, syntax_ptr)
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}
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ast::Expr::ArrayExpr(e) => {
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let kind = e.kind();
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match kind {
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ArrayExprKind::ElementList(e) => {
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let exprs = e.map(|expr| self.collect_expr(expr)).collect();
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self.alloc_expr(Expr::Array(Array::ElementList(exprs)), syntax_ptr)
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}
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ArrayExprKind::Repeat { initializer, repeat } => {
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let initializer = self.collect_expr_opt(initializer);
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let repeat = self.collect_expr_opt(repeat);
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self.alloc_expr(
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Expr::Array(Array::Repeat { initializer, repeat }),
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syntax_ptr,
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)
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}
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}
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}
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ast::Expr::Literal(e) => {
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let lit = match e.kind() {
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LiteralKind::IntNumber { suffix } => {
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let known_name = suffix.and_then(|it| BuiltinInt::from_suffix(&it));
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Literal::Int(Default::default(), known_name)
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}
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LiteralKind::FloatNumber { suffix } => {
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let known_name = suffix.and_then(|it| BuiltinFloat::from_suffix(&it));
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Literal::Float(Default::default(), known_name)
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}
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LiteralKind::ByteString => Literal::ByteString(Default::default()),
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LiteralKind::String => Literal::String(Default::default()),
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LiteralKind::Byte => Literal::Int(Default::default(), Some(BuiltinInt::U8)),
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LiteralKind::Bool => Literal::Bool(Default::default()),
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LiteralKind::Char => Literal::Char(Default::default()),
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};
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self.alloc_expr(Expr::Literal(lit), syntax_ptr)
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}
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ast::Expr::IndexExpr(e) => {
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let base = self.collect_expr_opt(e.base());
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let index = self.collect_expr_opt(e.index());
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self.alloc_expr(Expr::Index { base, index }, syntax_ptr)
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}
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ast::Expr::RangeExpr(e) => {
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let lhs = e.start().map(|lhs| self.collect_expr(lhs));
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let rhs = e.end().map(|rhs| self.collect_expr(rhs));
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match e.op_kind() {
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Some(range_type) => {
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self.alloc_expr(Expr::Range { lhs, rhs, range_type }, syntax_ptr)
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}
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None => self.alloc_expr(Expr::Missing, syntax_ptr),
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}
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}
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ast::Expr::MacroCall(e) => {
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if let Some(name) = is_macro_rules(&e) {
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let mac = MacroDefId {
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krate: Some(self.expander.module.krate),
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ast_id: Some(self.expander.ast_id(&e)),
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kind: MacroDefKind::Declarative,
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};
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self.body.item_scope.define_legacy_macro(name, mac);
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// FIXME: do we still need to allocate this as missing ?
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self.alloc_expr(Expr::Missing, syntax_ptr)
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} else {
|
|
let macro_call = self.expander.to_source(AstPtr::new(&e));
|
|
match self.expander.enter_expand(self.db, Some(&self.body.item_scope), e) {
|
|
Some((mark, expansion)) => {
|
|
self.source_map
|
|
.expansions
|
|
.insert(macro_call, self.expander.current_file_id);
|
|
let id = self.collect_expr(expansion);
|
|
self.expander.exit(self.db, mark);
|
|
id
|
|
}
|
|
None => self.alloc_expr(Expr::Missing, syntax_ptr),
|
|
}
|
|
}
|
|
}
|
|
|
|
// FIXME implement HIR for these:
|
|
ast::Expr::Label(_e) => 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),
|
|
};
|
|
self.collect_block_items(&block);
|
|
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_items(&mut self, block: &ast::Block) {
|
|
let container = ContainerId::DefWithBodyId(self.def);
|
|
for item in block.items() {
|
|
let (def, name): (ModuleDefId, Option<ast::Name>) = match item {
|
|
ast::ModuleItem::FnDef(def) => {
|
|
let ast_id = self.expander.ast_id(&def);
|
|
(
|
|
FunctionLoc { container: container.into(), ast_id }.intern(self.db).into(),
|
|
def.name(),
|
|
)
|
|
}
|
|
ast::ModuleItem::TypeAliasDef(def) => {
|
|
let ast_id = self.expander.ast_id(&def);
|
|
(
|
|
TypeAliasLoc { container: container.into(), ast_id }.intern(self.db).into(),
|
|
def.name(),
|
|
)
|
|
}
|
|
ast::ModuleItem::ConstDef(def) => {
|
|
let ast_id = self.expander.ast_id(&def);
|
|
(
|
|
ConstLoc { container: container.into(), ast_id }.intern(self.db).into(),
|
|
def.name(),
|
|
)
|
|
}
|
|
ast::ModuleItem::StaticDef(def) => {
|
|
let ast_id = self.expander.ast_id(&def);
|
|
(StaticLoc { container, ast_id }.intern(self.db).into(), def.name())
|
|
}
|
|
ast::ModuleItem::StructDef(def) => {
|
|
let ast_id = self.expander.ast_id(&def);
|
|
(StructLoc { container, ast_id }.intern(self.db).into(), def.name())
|
|
}
|
|
ast::ModuleItem::EnumDef(def) => {
|
|
let ast_id = self.expander.ast_id(&def);
|
|
(EnumLoc { container, ast_id }.intern(self.db).into(), def.name())
|
|
}
|
|
ast::ModuleItem::UnionDef(def) => {
|
|
let ast_id = self.expander.ast_id(&def);
|
|
(UnionLoc { container, ast_id }.intern(self.db).into(), def.name())
|
|
}
|
|
ast::ModuleItem::TraitDef(def) => {
|
|
let ast_id = self.expander.ast_id(&def);
|
|
(TraitLoc { container, ast_id }.intern(self.db).into(), def.name())
|
|
}
|
|
ast::ModuleItem::ImplDef(_)
|
|
| ast::ModuleItem::UseItem(_)
|
|
| ast::ModuleItem::ExternCrateItem(_)
|
|
| ast::ModuleItem::Module(_) => continue,
|
|
};
|
|
self.body.item_scope.define_def(def);
|
|
if let Some(name) = name {
|
|
let vis = crate::visibility::Visibility::Public; // FIXME determine correctly
|
|
self.body
|
|
.item_scope
|
|
.push_res(name.as_name(), crate::per_ns::PerNs::from_def(def, vis));
|
|
}
|
|
}
|
|
}
|
|
|
|
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));
|
|
if annotation == BindingAnnotation::Unannotated && subpat.is_none() {
|
|
// This could also be a single-segment path pattern. To
|
|
// decide that, we need to try resolving the name.
|
|
let (resolved, _) = self.expander.crate_def_map.resolve_path(
|
|
self.db,
|
|
self.expander.module.local_id,
|
|
&name.clone().into(),
|
|
BuiltinShadowMode::Other,
|
|
);
|
|
match resolved.take_values() {
|
|
Some(ModuleDefId::ConstId(_)) => Pat::Path(name.into()),
|
|
Some(ModuleDefId::EnumVariantId(_)) => {
|
|
// this is only really valid for unit variants, but
|
|
// shadowing other enum variants with a pattern is
|
|
// an error anyway
|
|
Pat::Path(name.into())
|
|
}
|
|
Some(ModuleDefId::AdtId(AdtId::StructId(s)))
|
|
if self.db.struct_data(s).variant_data.kind() != StructKind::Record =>
|
|
{
|
|
// Funnily enough, record structs *can* be shadowed
|
|
// by pattern bindings (but unit or tuple structs
|
|
// can't).
|
|
Pat::Path(name.into())
|
|
}
|
|
// shadowing statics is an error as well, so we just ignore that case here
|
|
_ => Pat::Bind { name, mode: annotation, subpat },
|
|
}
|
|
} else {
|
|
Pat::Bind { name, mode: annotation, subpat }
|
|
}
|
|
}
|
|
ast::Pat::TupleStructPat(p) => {
|
|
let path = p.path().and_then(|path| self.expander.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.expander.parse_path(path));
|
|
path.map(Pat::Path).unwrap_or(Pat::Missing)
|
|
}
|
|
ast::Pat::OrPat(p) => {
|
|
let pats = p.pats().map(|p| self.collect_pat(p)).collect();
|
|
Pat::Or(pats)
|
|
}
|
|
ast::Pat::ParenPat(p) => return self.collect_pat_opt(p.pat()),
|
|
ast::Pat::TuplePat(p) => {
|
|
let args = p.args().map(|p| self.collect_pat(p)).collect();
|
|
Pat::Tuple(args)
|
|
}
|
|
ast::Pat::PlaceholderPat(_) | ast::Pat::DotDotPat(_) => Pat::Wild,
|
|
ast::Pat::RecordPat(p) => {
|
|
let path = p.path().and_then(|path| self.expander.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 }
|
|
}
|
|
ast::Pat::SlicePat(p) => {
|
|
let SlicePatComponents { prefix, slice, suffix } = p.components();
|
|
|
|
Pat::Slice {
|
|
prefix: prefix.into_iter().map(|p| self.collect_pat(p)).collect(),
|
|
slice: slice.map(|p| self.collect_pat(p)),
|
|
suffix: suffix.into_iter().map(|p| self.collect_pat(p)).collect(),
|
|
}
|
|
}
|
|
|
|
// FIXME: implement
|
|
ast::Pat::BoxPat(_) => Pat::Missing,
|
|
ast::Pat::LiteralPat(_) => Pat::Missing,
|
|
ast::Pat::RangePat(_) => Pat::Missing,
|
|
};
|
|
let ptr = AstPtr::new(&pat);
|
|
self.alloc_pat(pattern, Either::Left(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 is_macro_rules(m: &ast::MacroCall) -> Option<Name> {
|
|
let name = m.path()?.segment()?.name_ref()?.as_name();
|
|
|
|
if name == name![macro_rules] {
|
|
Some(m.name()?.as_name())
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
impl From<ast::BinOp> for BinaryOp {
|
|
fn from(ast_op: ast::BinOp) -> Self {
|
|
match ast_op {
|
|
ast::BinOp::BooleanOr => BinaryOp::LogicOp(LogicOp::Or),
|
|
ast::BinOp::BooleanAnd => BinaryOp::LogicOp(LogicOp::And),
|
|
ast::BinOp::EqualityTest => BinaryOp::CmpOp(CmpOp::Eq { negated: false }),
|
|
ast::BinOp::NegatedEqualityTest => BinaryOp::CmpOp(CmpOp::Eq { negated: true }),
|
|
ast::BinOp::LesserEqualTest => {
|
|
BinaryOp::CmpOp(CmpOp::Ord { ordering: Ordering::Less, strict: false })
|
|
}
|
|
ast::BinOp::GreaterEqualTest => {
|
|
BinaryOp::CmpOp(CmpOp::Ord { ordering: Ordering::Greater, strict: false })
|
|
}
|
|
ast::BinOp::LesserTest => {
|
|
BinaryOp::CmpOp(CmpOp::Ord { ordering: Ordering::Less, strict: true })
|
|
}
|
|
ast::BinOp::GreaterTest => {
|
|
BinaryOp::CmpOp(CmpOp::Ord { ordering: Ordering::Greater, strict: true })
|
|
}
|
|
ast::BinOp::Addition => BinaryOp::ArithOp(ArithOp::Add),
|
|
ast::BinOp::Multiplication => BinaryOp::ArithOp(ArithOp::Mul),
|
|
ast::BinOp::Subtraction => BinaryOp::ArithOp(ArithOp::Sub),
|
|
ast::BinOp::Division => BinaryOp::ArithOp(ArithOp::Div),
|
|
ast::BinOp::Remainder => BinaryOp::ArithOp(ArithOp::Rem),
|
|
ast::BinOp::LeftShift => BinaryOp::ArithOp(ArithOp::Shl),
|
|
ast::BinOp::RightShift => BinaryOp::ArithOp(ArithOp::Shr),
|
|
ast::BinOp::BitwiseXor => BinaryOp::ArithOp(ArithOp::BitXor),
|
|
ast::BinOp::BitwiseOr => BinaryOp::ArithOp(ArithOp::BitOr),
|
|
ast::BinOp::BitwiseAnd => BinaryOp::ArithOp(ArithOp::BitAnd),
|
|
ast::BinOp::Assignment => BinaryOp::Assignment { op: None },
|
|
ast::BinOp::AddAssign => BinaryOp::Assignment { op: Some(ArithOp::Add) },
|
|
ast::BinOp::DivAssign => BinaryOp::Assignment { op: Some(ArithOp::Div) },
|
|
ast::BinOp::MulAssign => BinaryOp::Assignment { op: Some(ArithOp::Mul) },
|
|
ast::BinOp::RemAssign => BinaryOp::Assignment { op: Some(ArithOp::Rem) },
|
|
ast::BinOp::ShlAssign => BinaryOp::Assignment { op: Some(ArithOp::Shl) },
|
|
ast::BinOp::ShrAssign => BinaryOp::Assignment { op: Some(ArithOp::Shr) },
|
|
ast::BinOp::SubAssign => BinaryOp::Assignment { op: Some(ArithOp::Sub) },
|
|
ast::BinOp::BitOrAssign => BinaryOp::Assignment { op: Some(ArithOp::BitOr) },
|
|
ast::BinOp::BitAndAssign => BinaryOp::Assignment { op: Some(ArithOp::BitAnd) },
|
|
ast::BinOp::BitXorAssign => BinaryOp::Assignment { op: Some(ArithOp::BitXor) },
|
|
}
|
|
}
|
|
}
|