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Auto merge of #15003 - WaffleLapkin:become_unuwuable, r=Veykril
feature: Add basic support for `become` expr/tail calls
This follows https://github.com/rust-lang/rfcs/pull/3407 and my WIP implementation in the compiler.
Notice that I haven't even *opened* a compiler PR (although I plan to soon), so this feature doesn't really exist outside of my WIP branches. I've used this to help me test my implementation; opening a PR before I forget.
(feel free to ignore this for now, given all of the above)
| -rw-r--r-- | crates/hir-def/src/body/lower.rs | 5 | ||||
| -rw-r--r-- | crates/hir-def/src/body/pretty.rs | 5 | ||||
| -rw-r--r-- | crates/hir-def/src/hir.rs | 4 | ||||
| -rw-r--r-- | crates/hir-ty/src/infer/closure.rs | 3 | ||||
| -rw-r--r-- | crates/hir-ty/src/infer/expr.rs | 22 | ||||
| -rw-r--r-- | crates/hir-ty/src/infer/mutability.rs | 3 | ||||
| -rw-r--r-- | crates/hir-ty/src/mir/lower.rs | 1 | ||||
| -rw-r--r-- | crates/ide-db/src/syntax_helpers/node_ext.rs | 1 | ||||
| -rw-r--r-- | crates/parser/src/grammar/expressions/atom.rs | 14 | ||||
| -rw-r--r-- | crates/parser/src/syntax_kind/generated.rs | 6 | ||||
| -rw-r--r-- | crates/parser/test_data/parser/inline/ok/0209_become_expr.rast | 31 | ||||
| -rw-r--r-- | crates/parser/test_data/parser/inline/ok/0209_become_expr.rs | 3 | ||||
| -rw-r--r-- | crates/syntax/rust.ungram | 4 | ||||
| -rw-r--r-- | crates/syntax/src/ast/generated/nodes.rs | 34 | ||||
| -rw-r--r-- | crates/syntax/src/ast/prec.rs | 8 | ||||
| -rw-r--r-- | crates/syntax/src/tests/ast_src.rs | 6 |
16 files changed, 144 insertions, 6 deletions
diff --git a/crates/hir-def/src/body/lower.rs b/crates/hir-def/src/body/lower.rs index 8a589a6cf1..11b87f1952 100644 --- a/crates/hir-def/src/body/lower.rs +++ b/crates/hir-def/src/body/lower.rs @@ -416,6 +416,11 @@ impl ExprCollector<'_> { let expr = e.expr().map(|e| self.collect_expr(e)); self.alloc_expr(Expr::Return { expr }, syntax_ptr) } + ast::Expr::BecomeExpr(e) => { + let expr = + e.expr().map(|e| self.collect_expr(e)).unwrap_or_else(|| self.missing_expr()); + self.alloc_expr(Expr::Become { expr }, syntax_ptr) + } ast::Expr::YieldExpr(e) => { self.is_lowering_coroutine = true; let expr = e.expr().map(|e| self.collect_expr(e)); diff --git a/crates/hir-def/src/body/pretty.rs b/crates/hir-def/src/body/pretty.rs index 4afb408651..773b7c575e 100644 --- a/crates/hir-def/src/body/pretty.rs +++ b/crates/hir-def/src/body/pretty.rs @@ -261,6 +261,11 @@ impl Printer<'_> { self.print_expr(*expr); } } + Expr::Become { expr } => { + w!(self, "become"); + self.whitespace(); + self.print_expr(*expr); + } Expr::Yield { expr } => { w!(self, "yield"); if let Some(expr) = expr { diff --git a/crates/hir-def/src/hir.rs b/crates/hir-def/src/hir.rs index ac44d37941..f008ae761a 100644 --- a/crates/hir-def/src/hir.rs +++ b/crates/hir-def/src/hir.rs @@ -216,6 +216,9 @@ pub enum Expr { Return { expr: Option<ExprId>, }, + Become { + expr: ExprId, + }, Yield { expr: Option<ExprId>, }, @@ -410,6 +413,7 @@ impl Expr { f(expr); } } + Expr::Become { expr } => f(*expr), Expr::RecordLit { fields, spread, .. } => { for field in fields.iter() { f(field.expr); diff --git a/crates/hir-ty/src/infer/closure.rs b/crates/hir-ty/src/infer/closure.rs index c3746f7870..83ad6f54d6 100644 --- a/crates/hir-ty/src/infer/closure.rs +++ b/crates/hir-ty/src/infer/closure.rs @@ -531,6 +531,9 @@ impl InferenceContext<'_> { self.consume_expr(expr); } } + &Expr::Become { expr } => { + self.consume_expr(expr); + } Expr::RecordLit { fields, spread, .. } => { if let &Some(expr) = spread { self.consume_expr(expr); diff --git a/crates/hir-ty/src/infer/expr.rs b/crates/hir-ty/src/infer/expr.rs index 8b8e97b008..30c676a240 100644 --- a/crates/hir-ty/src/infer/expr.rs +++ b/crates/hir-ty/src/infer/expr.rs @@ -502,6 +502,7 @@ impl InferenceContext<'_> { self.result.standard_types.never.clone() } &Expr::Return { expr } => self.infer_expr_return(tgt_expr, expr), + &Expr::Become { expr } => self.infer_expr_become(expr), Expr::Yield { expr } => { if let Some((resume_ty, yield_ty)) = self.resume_yield_tys.clone() { if let Some(expr) = expr { @@ -1084,6 +1085,27 @@ impl InferenceContext<'_> { self.result.standard_types.never.clone() } + fn infer_expr_become(&mut self, expr: ExprId) -> Ty { + match &self.return_coercion { + Some(return_coercion) => { + let ret_ty = return_coercion.expected_ty(); + + let call_expr_ty = + self.infer_expr_inner(expr, &Expectation::HasType(ret_ty.clone())); + + // NB: this should *not* coerce. + // tail calls don't support any coercions except lifetimes ones (like `&'static u8 -> &'a u8`). + self.unify(&call_expr_ty, &ret_ty); + } + None => { + // FIXME: diagnose `become` outside of functions + self.infer_expr_no_expect(expr); + } + } + + self.result.standard_types.never.clone() + } + fn infer_expr_box(&mut self, inner_expr: ExprId, expected: &Expectation) -> Ty { if let Some(box_id) = self.resolve_boxed_box() { let table = &mut self.table; diff --git a/crates/hir-ty/src/infer/mutability.rs b/crates/hir-ty/src/infer/mutability.rs index 663ea85323..c9fc5bccea 100644 --- a/crates/hir-ty/src/infer/mutability.rs +++ b/crates/hir-ty/src/infer/mutability.rs @@ -93,6 +93,9 @@ impl InferenceContext<'_> { self.infer_mut_expr(expr, Mutability::Not); } } + Expr::Become { expr } => { + self.infer_mut_expr(*expr, Mutability::Not); + } Expr::RecordLit { path: _, fields, spread, ellipsis: _, is_assignee_expr: _ } => { self.infer_mut_not_expr_iter(fields.iter().map(|it| it.expr).chain(*spread)) } diff --git a/crates/hir-ty/src/mir/lower.rs b/crates/hir-ty/src/mir/lower.rs index 0ba8a17103..dad1ed10ce 100644 --- a/crates/hir-ty/src/mir/lower.rs +++ b/crates/hir-ty/src/mir/lower.rs @@ -775,6 +775,7 @@ impl<'ctx> MirLowerCtx<'ctx> { self.set_terminator(current, TerminatorKind::Return, expr_id.into()); Ok(None) } + Expr::Become { .. } => not_supported!("tail-calls"), Expr::Yield { .. } => not_supported!("yield"), Expr::RecordLit { fields, path, spread, ellipsis: _, is_assignee_expr: _ } => { let spread_place = match spread { diff --git a/crates/ide-db/src/syntax_helpers/node_ext.rs b/crates/ide-db/src/syntax_helpers/node_ext.rs index e4e735cecd..4f706e26af 100644 --- a/crates/ide-db/src/syntax_helpers/node_ext.rs +++ b/crates/ide-db/src/syntax_helpers/node_ext.rs @@ -329,6 +329,7 @@ pub fn for_each_tail_expr(expr: &ast::Expr, cb: &mut dyn FnMut(&ast::Expr)) { | ast::Expr::RecordExpr(_) | ast::Expr::RefExpr(_) | ast::Expr::ReturnExpr(_) + | ast::Expr::BecomeExpr(_) | ast::Expr::TryExpr(_) | ast::Expr::TupleExpr(_) | ast::Expr::LetExpr(_) diff --git a/crates/parser/src/grammar/expressions/atom.rs b/crates/parser/src/grammar/expressions/atom.rs index 4197f248e0..48600641ad 100644 --- a/crates/parser/src/grammar/expressions/atom.rs +++ b/crates/parser/src/grammar/expressions/atom.rs @@ -58,6 +58,7 @@ pub(super) const ATOM_EXPR_FIRST: TokenSet = T![match], T![move], T![return], + T![become], T![static], T![try], T![unsafe], @@ -102,6 +103,7 @@ pub(super) fn atom_expr( T![try] => try_block_expr(p, None), T![match] => match_expr(p), T![return] => return_expr(p), + T![become] => become_expr(p), T![yield] => yield_expr(p), T![do] if p.nth_at_contextual_kw(1, T![yeet]) => yeet_expr(p), T![continue] => continue_expr(p), @@ -621,6 +623,18 @@ fn return_expr(p: &mut Parser<'_>) -> CompletedMarker { m.complete(p, RETURN_EXPR) } +// test become_expr +// fn foo() { +// become foo(); +// } +fn become_expr(p: &mut Parser<'_>) -> CompletedMarker { + assert!(p.at(T![become])); + let m = p.start(); + p.bump(T![become]); + expr(p); + m.complete(p, BECOME_EXPR) +} + // test yield_expr // fn foo() { // yield; diff --git a/crates/parser/src/syntax_kind/generated.rs b/crates/parser/src/syntax_kind/generated.rs index 4b58903767..6ecfdc9f46 100644 --- a/crates/parser/src/syntax_kind/generated.rs +++ b/crates/parser/src/syntax_kind/generated.rs @@ -90,6 +90,7 @@ pub enum SyntaxKind { PUB_KW, REF_KW, RETURN_KW, + BECOME_KW, SELF_KW, SELF_TYPE_KW, STATIC_KW, @@ -195,6 +196,7 @@ pub enum SyntaxKind { BLOCK_EXPR, STMT_LIST, RETURN_EXPR, + BECOME_EXPR, YIELD_EXPR, YEET_EXPR, LET_EXPR, @@ -307,6 +309,7 @@ impl SyntaxKind { | PUB_KW | REF_KW | RETURN_KW + | BECOME_KW | SELF_KW | SELF_TYPE_KW | STATIC_KW @@ -425,6 +428,7 @@ impl SyntaxKind { "pub" => PUB_KW, "ref" => REF_KW, "return" => RETURN_KW, + "become" => BECOME_KW, "self" => SELF_KW, "Self" => SELF_TYPE_KW, "static" => STATIC_KW, @@ -496,4 +500,4 @@ impl SyntaxKind { } } #[macro_export] -macro_rules ! T { [;] => { $ crate :: SyntaxKind :: SEMICOLON } ; [,] => { $ crate :: SyntaxKind :: COMMA } ; ['('] => { $ crate :: SyntaxKind :: L_PAREN } ; [')'] => { $ crate :: SyntaxKind :: R_PAREN } ; ['{'] => { $ crate :: SyntaxKind :: L_CURLY } ; ['}'] => { $ crate :: SyntaxKind :: R_CURLY } ; ['['] => { $ crate :: SyntaxKind :: L_BRACK } ; [']'] => { $ crate :: SyntaxKind :: R_BRACK } ; [<] => { $ crate :: SyntaxKind :: L_ANGLE } ; [>] => { $ crate :: SyntaxKind :: R_ANGLE } ; [@] => { $ crate :: SyntaxKind :: AT } ; [#] => { $ crate :: SyntaxKind :: POUND } ; [~] => { $ crate :: SyntaxKind :: TILDE } ; [?] => { $ crate :: SyntaxKind :: QUESTION } ; [$] => { $ crate :: SyntaxKind :: DOLLAR } ; [&] => { $ crate :: SyntaxKind :: AMP } ; [|] => { $ crate :: SyntaxKind :: PIPE } ; [+] => { $ crate :: SyntaxKind :: PLUS } ; [*] => { $ crate :: SyntaxKind :: STAR } ; [/] => { $ crate :: SyntaxKind :: SLASH } ; [^] => { $ crate :: SyntaxKind :: CARET } ; [%] => { $ crate :: SyntaxKind :: PERCENT } ; [_] => { $ crate :: SyntaxKind :: UNDERSCORE } ; [.] => { $ crate :: SyntaxKind :: DOT } ; [..] => { $ crate :: SyntaxKind :: DOT2 } ; [...] => { $ crate :: SyntaxKind :: DOT3 } ; [..=] => { $ crate :: SyntaxKind :: DOT2EQ } ; [:] => { $ crate :: SyntaxKind :: COLON } ; [::] => { $ crate :: SyntaxKind :: COLON2 } ; [=] => { $ crate :: SyntaxKind :: EQ } ; [==] => { $ crate :: SyntaxKind :: EQ2 } ; [=>] => { $ crate :: SyntaxKind :: FAT_ARROW } ; [!] => { $ crate :: SyntaxKind :: BANG } ; [!=] => { $ crate :: SyntaxKind :: NEQ } ; [-] => { $ crate :: SyntaxKind :: MINUS } ; [->] => { $ crate :: SyntaxKind :: THIN_ARROW } ; [<=] => { $ crate :: SyntaxKind :: LTEQ } ; [>=] => { $ crate :: SyntaxKind :: GTEQ } ; [+=] => { $ crate :: SyntaxKind :: PLUSEQ } ; [-=] => { $ crate :: SyntaxKind :: MINUSEQ } ; [|=] => { $ crate :: SyntaxKind :: PIPEEQ } ; [&=] => { $ crate :: SyntaxKind :: AMPEQ } ; [^=] => { $ crate :: SyntaxKind :: CARETEQ } ; [/=] => { $ crate :: SyntaxKind :: SLASHEQ } ; [*=] => { $ crate :: SyntaxKind :: STAREQ } ; [%=] => { $ crate :: SyntaxKind :: PERCENTEQ } ; [&&] => { $ crate :: SyntaxKind :: AMP2 } ; [||] => { $ crate :: SyntaxKind :: PIPE2 } ; [<<] => { $ crate :: SyntaxKind :: SHL } ; [>>] => { $ crate :: SyntaxKind :: SHR } ; [<<=] => { $ crate :: SyntaxKind :: SHLEQ } ; [>>=] => { $ crate :: SyntaxKind :: SHREQ } ; [as] => { $ crate :: SyntaxKind :: AS_KW } ; [async] => { $ crate :: SyntaxKind :: ASYNC_KW } ; [await] => { $ crate :: SyntaxKind :: AWAIT_KW } ; [box] => { $ crate :: SyntaxKind :: BOX_KW } ; [break] => { $ crate :: SyntaxKind :: BREAK_KW } ; [const] => { $ crate :: SyntaxKind :: CONST_KW } ; [continue] => { $ crate :: SyntaxKind :: CONTINUE_KW } ; [crate] => { $ crate :: SyntaxKind :: CRATE_KW } ; [do] => { $ crate :: SyntaxKind :: DO_KW } ; [dyn] => { $ crate :: SyntaxKind :: DYN_KW } ; [else] => { $ crate :: SyntaxKind :: ELSE_KW } ; [enum] => { $ crate :: SyntaxKind :: ENUM_KW } ; [extern] => { $ crate :: SyntaxKind :: EXTERN_KW } ; [false] => { $ crate :: SyntaxKind :: FALSE_KW } ; [fn] => { $ crate :: SyntaxKind :: FN_KW } ; [for] => { $ crate :: SyntaxKind :: FOR_KW } ; [if] => { $ crate :: SyntaxKind :: IF_KW } ; [impl] => { $ crate :: SyntaxKind :: IMPL_KW } ; [in] => { $ crate :: SyntaxKind :: IN_KW } ; [let] => { $ crate :: SyntaxKind :: LET_KW } ; [loop] => { $ crate :: SyntaxKind :: LOOP_KW } ; [macro] => { $ crate :: SyntaxKind :: MACRO_KW } ; [match] => { $ crate :: SyntaxKind :: MATCH_KW } ; [mod] => { $ crate :: SyntaxKind :: MOD_KW } ; [move] => { $ crate :: SyntaxKind :: MOVE_KW } ; [mut] => { $ crate :: SyntaxKind :: MUT_KW } ; [pub] => { $ crate :: SyntaxKind :: PUB_KW } ; [ref] => { $ crate :: SyntaxKind :: REF_KW } ; [return] => { $ crate :: SyntaxKind :: RETURN_KW } ; [self] => { $ crate :: SyntaxKind :: SELF_KW } ; [Self] => { $ crate :: SyntaxKind :: SELF_TYPE_KW } ; [static] => { $ crate :: SyntaxKind :: STATIC_KW } ; [struct] => { $ crate :: SyntaxKind :: STRUCT_KW } ; [super] => { $ crate :: SyntaxKind :: SUPER_KW } ; [trait] => { $ crate :: SyntaxKind :: TRAIT_KW } ; [true] => { $ crate :: SyntaxKind :: TRUE_KW } ; [try] => { $ crate :: SyntaxKind :: TRY_KW } ; [type] => { $ crate :: SyntaxKind :: TYPE_KW } ; [unsafe] => { $ crate :: SyntaxKind :: UNSAFE_KW } ; [use] => { $ crate :: SyntaxKind :: USE_KW } ; [where] => { $ crate :: SyntaxKind :: WHERE_KW } ; [while] => { $ crate :: SyntaxKind :: WHILE_KW } ; [yield] => { $ crate :: SyntaxKind :: YIELD_KW } ; [auto] => { $ crate :: SyntaxKind :: AUTO_KW } ; [builtin] => { $ crate :: SyntaxKind :: BUILTIN_KW } ; [default] => { $ crate :: SyntaxKind :: DEFAULT_KW } ; [existential] => { $ crate :: SyntaxKind :: EXISTENTIAL_KW } ; [union] => { $ crate :: SyntaxKind :: UNION_KW } ; [raw] => { $ crate :: SyntaxKind :: RAW_KW } ; [macro_rules] => { $ crate :: SyntaxKind :: MACRO_RULES_KW } ; [yeet] => { $ crate :: SyntaxKind :: YEET_KW } ; [offset_of] => { $ crate :: SyntaxKind :: OFFSET_OF_KW } ; [asm] => { $ crate :: SyntaxKind :: ASM_KW } ; [format_args] => { $ crate :: SyntaxKind :: FORMAT_ARGS_KW } ; [lifetime_ident] => { $ crate :: SyntaxKind :: LIFETIME_IDENT } ; [ident] => { $ crate :: SyntaxKind :: IDENT } ; [shebang] => { $ crate :: SyntaxKind :: SHEBANG } ; } +macro_rules ! T { [;] => { $ crate :: SyntaxKind :: SEMICOLON } ; [,] => { $ crate :: SyntaxKind :: COMMA } ; ['('] => { $ crate :: SyntaxKind :: L_PAREN } ; [')'] => { $ crate :: SyntaxKind :: R_PAREN } ; ['{'] => { $ crate :: SyntaxKind :: L_CURLY } ; ['}'] => { $ crate :: SyntaxKind :: R_CURLY } ; ['['] => { $ crate :: SyntaxKind :: L_BRACK } ; [']'] => { $ crate :: SyntaxKind :: R_BRACK } ; [<] => { $ crate :: SyntaxKind :: L_ANGLE } ; [>] => { $ crate :: SyntaxKind :: R_ANGLE } ; [@] => { $ crate :: SyntaxKind :: AT } ; [#] => { $ crate :: SyntaxKind :: POUND } ; [~] => { $ crate :: SyntaxKind :: TILDE } ; [?] => { $ crate :: SyntaxKind :: QUESTION } ; [$] => { $ crate :: SyntaxKind :: DOLLAR } ; [&] => { $ crate :: SyntaxKind :: AMP } ; [|] => { $ crate :: SyntaxKind :: PIPE } ; [+] => { $ crate :: SyntaxKind :: PLUS } ; [*] => { $ crate :: SyntaxKind :: STAR } ; [/] => { $ crate :: SyntaxKind :: SLASH } ; [^] => { $ crate :: SyntaxKind :: CARET } ; [%] => { $ crate :: SyntaxKind :: PERCENT } ; [_] => { $ crate :: SyntaxKind :: UNDERSCORE } ; [.] => { $ crate :: SyntaxKind :: DOT } ; [..] => { $ crate :: SyntaxKind :: DOT2 } ; [...] => { $ crate :: SyntaxKind :: DOT3 } ; [..=] => { $ crate :: SyntaxKind :: DOT2EQ } ; [:] => { $ crate :: SyntaxKind :: COLON } ; [::] => { $ crate :: SyntaxKind :: COLON2 } ; [=] => { $ crate :: SyntaxKind :: EQ } ; [==] => { $ crate :: SyntaxKind :: EQ2 } ; [=>] => { $ crate :: SyntaxKind :: FAT_ARROW } ; [!] => { $ crate :: SyntaxKind :: BANG } ; [!=] => { $ crate :: SyntaxKind :: NEQ } ; [-] => { $ crate :: SyntaxKind :: MINUS } ; [->] => { $ crate :: SyntaxKind :: THIN_ARROW } ; [<=] => { $ crate :: SyntaxKind :: LTEQ } ; [>=] => { $ crate :: SyntaxKind :: GTEQ } ; [+=] => { $ crate :: SyntaxKind :: PLUSEQ } ; [-=] => { $ crate :: SyntaxKind :: MINUSEQ } ; [|=] => { $ crate :: SyntaxKind :: PIPEEQ } ; [&=] => { $ crate :: SyntaxKind :: AMPEQ } ; [^=] => { $ crate :: SyntaxKind :: CARETEQ } ; [/=] => { $ crate :: SyntaxKind :: SLASHEQ } ; [*=] => { $ crate :: SyntaxKind :: STAREQ } ; [%=] => { $ crate :: SyntaxKind :: PERCENTEQ } ; [&&] => { $ crate :: SyntaxKind :: AMP2 } ; [||] => { $ crate :: SyntaxKind :: PIPE2 } ; [<<] => { $ crate :: SyntaxKind :: SHL } ; [>>] => { $ crate :: SyntaxKind :: SHR } ; [<<=] => { $ crate :: SyntaxKind :: SHLEQ } ; [>>=] => { $ crate :: SyntaxKind :: SHREQ } ; [as] => { $ crate :: SyntaxKind :: AS_KW } ; [async] => { $ crate :: SyntaxKind :: ASYNC_KW } ; [await] => { $ crate :: SyntaxKind :: AWAIT_KW } ; [box] => { $ crate :: SyntaxKind :: BOX_KW } ; [break] => { $ crate :: SyntaxKind :: BREAK_KW } ; [const] => { $ crate :: SyntaxKind :: CONST_KW } ; [continue] => { $ crate :: SyntaxKind :: CONTINUE_KW } ; [crate] => { $ crate :: SyntaxKind :: CRATE_KW } ; [do] => { $ crate :: SyntaxKind :: DO_KW } ; [dyn] => { $ crate :: SyntaxKind :: DYN_KW } ; [else] => { $ crate :: SyntaxKind :: ELSE_KW } ; [enum] => { $ crate :: SyntaxKind :: ENUM_KW } ; [extern] => { $ crate :: SyntaxKind :: EXTERN_KW } ; [false] => { $ crate :: SyntaxKind :: FALSE_KW } ; [fn] => { $ crate :: SyntaxKind :: FN_KW } ; [for] => { $ crate :: SyntaxKind :: FOR_KW } ; [if] => { $ crate :: SyntaxKind :: IF_KW } ; [impl] => { $ crate :: SyntaxKind :: IMPL_KW } ; [in] => { $ crate :: SyntaxKind :: IN_KW } ; [let] => { $ crate :: SyntaxKind :: LET_KW } ; [loop] => { $ crate :: SyntaxKind :: LOOP_KW } ; [macro] => { $ crate :: SyntaxKind :: MACRO_KW } ; [match] => { $ crate :: SyntaxKind :: MATCH_KW } ; [mod] => { $ crate :: SyntaxKind :: MOD_KW } ; [move] => { $ crate :: SyntaxKind :: MOVE_KW } ; [mut] => { $ crate :: SyntaxKind :: MUT_KW } ; [pub] => { $ crate :: SyntaxKind :: PUB_KW } ; [ref] => { $ crate :: SyntaxKind :: REF_KW } ; [return] => { $ crate :: SyntaxKind :: RETURN_KW } ; [become] => { $ crate :: SyntaxKind :: BECOME_KW } ; [self] => { $ crate :: SyntaxKind :: SELF_KW } ; [Self] => { $ crate :: SyntaxKind :: SELF_TYPE_KW } ; [static] => { $ crate :: SyntaxKind :: STATIC_KW } ; [struct] => { $ crate :: SyntaxKind :: STRUCT_KW } ; [super] => { $ crate :: SyntaxKind :: SUPER_KW } ; [trait] => { $ crate :: SyntaxKind :: TRAIT_KW } ; [true] => { $ crate :: SyntaxKind :: TRUE_KW } ; [try] => { $ crate :: SyntaxKind :: TRY_KW } ; [type] => { $ crate :: SyntaxKind :: TYPE_KW } ; [unsafe] => { $ crate :: SyntaxKind :: UNSAFE_KW } ; [use] => { $ crate :: SyntaxKind :: USE_KW } ; [where] => { $ crate :: SyntaxKind :: WHERE_KW } ; [while] => { $ crate :: SyntaxKind :: WHILE_KW } ; [yield] => { $ crate :: SyntaxKind :: YIELD_KW } ; [auto] => { $ crate :: SyntaxKind :: AUTO_KW } ; [builtin] => { $ crate :: SyntaxKind :: BUILTIN_KW } ; [default] => { $ crate :: SyntaxKind :: DEFAULT_KW } ; [existential] => { $ crate :: SyntaxKind :: EXISTENTIAL_KW } ; [union] => { $ crate :: SyntaxKind :: UNION_KW } ; [raw] => { $ crate :: SyntaxKind :: RAW_KW } ; [macro_rules] => { $ crate :: SyntaxKind :: MACRO_RULES_KW } ; [yeet] => { $ crate :: SyntaxKind :: YEET_KW } ; [offset_of] => { $ crate :: SyntaxKind :: OFFSET_OF_KW } ; [asm] => { $ crate :: SyntaxKind :: ASM_KW } ; [format_args] => { $ crate :: SyntaxKind :: FORMAT_ARGS_KW } ; [lifetime_ident] => { $ crate :: SyntaxKind :: LIFETIME_IDENT } ; [ident] => { $ crate :: SyntaxKind :: IDENT } ; [shebang] => { $ crate :: SyntaxKind :: SHEBANG } ; } diff --git a/crates/parser/test_data/parser/inline/ok/0209_become_expr.rast b/crates/parser/test_data/parser/inline/ok/0209_become_expr.rast new file mode 100644 index 0000000000..c544cf4e5e --- /dev/null +++ b/crates/parser/test_data/parser/inline/ok/0209_become_expr.rast @@ -0,0 +1,31 @@ +SOURCE_FILE + FN + FN_KW "fn" + WHITESPACE " " + NAME + IDENT "foo" + PARAM_LIST + L_PAREN "(" + R_PAREN ")" + WHITESPACE " " + BLOCK_EXPR + STMT_LIST + L_CURLY "{" + WHITESPACE "\n " + EXPR_STMT + BECOME_EXPR + BECOME_KW "become" + WHITESPACE " " + CALL_EXPR + PATH_EXPR + PATH + PATH_SEGMENT + NAME_REF + IDENT "foo" + ARG_LIST + L_PAREN "(" + R_PAREN ")" + SEMICOLON ";" + WHITESPACE "\n" + R_CURLY "}" + WHITESPACE "\n" diff --git a/crates/parser/test_data/parser/inline/ok/0209_become_expr.rs b/crates/parser/test_data/parser/inline/ok/0209_become_expr.rs new file mode 100644 index 0000000000..918a83ca6e --- /dev/null +++ b/crates/parser/test_data/parser/inline/ok/0209_become_expr.rs @@ -0,0 +1,3 @@ +fn foo() { + become foo(); +} diff --git a/crates/syntax/rust.ungram b/crates/syntax/rust.ungram index c3010d090c..36d677e151 100644 --- a/crates/syntax/rust.ungram +++ b/crates/syntax/rust.ungram @@ -367,6 +367,7 @@ Expr = | RecordExpr | RefExpr | ReturnExpr +| BecomeExpr | TryExpr | TupleExpr | WhileExpr @@ -528,6 +529,9 @@ MatchGuard = ReturnExpr = Attr* 'return' Expr? +BecomeExpr = + Attr* 'become' Expr + YieldExpr = Attr* 'yield' Expr? diff --git a/crates/syntax/src/ast/generated/nodes.rs b/crates/syntax/src/ast/generated/nodes.rs index 6c86e59104..affcdc94d0 100644 --- a/crates/syntax/src/ast/generated/nodes.rs +++ b/crates/syntax/src/ast/generated/nodes.rs @@ -1096,6 +1096,16 @@ impl ReturnExpr { } #[derive(Debug, Clone, PartialEq, Eq, Hash)] +pub struct BecomeExpr { + pub(crate) syntax: SyntaxNode, +} +impl ast::HasAttrs for BecomeExpr {} +impl BecomeExpr { + pub fn become_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![become]) } + pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) } +} + +#[derive(Debug, Clone, PartialEq, Eq, Hash)] pub struct TryExpr { pub(crate) syntax: SyntaxNode, } @@ -1633,6 +1643,7 @@ pub enum Expr { RecordExpr(RecordExpr), RefExpr(RefExpr), ReturnExpr(ReturnExpr), + BecomeExpr(BecomeExpr), TryExpr(TryExpr), TupleExpr(TupleExpr), WhileExpr(WhileExpr), @@ -2792,6 +2803,17 @@ impl AstNode for ReturnExpr { } fn syntax(&self) -> &SyntaxNode { &self.syntax } } +impl AstNode for BecomeExpr { + fn can_cast(kind: SyntaxKind) -> bool { kind == BECOME_EXPR } + fn cast(syntax: SyntaxNode) -> Option<Self> { + if Self::can_cast(syntax.kind()) { + Some(Self { syntax }) + } else { + None + } + } + fn syntax(&self) -> &SyntaxNode { &self.syntax } +} impl AstNode for TryExpr { fn can_cast(kind: SyntaxKind) -> bool { kind == TRY_EXPR } fn cast(syntax: SyntaxNode) -> Option<Self> { @@ -3540,6 +3562,9 @@ impl From<RefExpr> for Expr { impl From<ReturnExpr> for Expr { fn from(node: ReturnExpr) -> Expr { Expr::ReturnExpr(node) } } +impl From<BecomeExpr> for Expr { + fn from(node: BecomeExpr) -> Expr { Expr::BecomeExpr(node) } +} impl From<TryExpr> for Expr { fn from(node: TryExpr) -> Expr { Expr::TryExpr(node) } } @@ -3593,6 +3618,7 @@ impl AstNode for Expr { | RECORD_EXPR | REF_EXPR | RETURN_EXPR + | BECOME_EXPR | TRY_EXPR | TUPLE_EXPR | WHILE_EXPR @@ -3632,6 +3658,7 @@ impl AstNode for Expr { RECORD_EXPR => Expr::RecordExpr(RecordExpr { syntax }), REF_EXPR => Expr::RefExpr(RefExpr { syntax }), RETURN_EXPR => Expr::ReturnExpr(ReturnExpr { syntax }), + BECOME_EXPR => Expr::BecomeExpr(BecomeExpr { syntax }), TRY_EXPR => Expr::TryExpr(TryExpr { syntax }), TUPLE_EXPR => Expr::TupleExpr(TupleExpr { syntax }), WHILE_EXPR => Expr::WhileExpr(WhileExpr { syntax }), @@ -3673,6 +3700,7 @@ impl AstNode for Expr { Expr::RecordExpr(it) => &it.syntax, Expr::RefExpr(it) => &it.syntax, Expr::ReturnExpr(it) => &it.syntax, + Expr::BecomeExpr(it) => &it.syntax, Expr::TryExpr(it) => &it.syntax, Expr::TupleExpr(it) => &it.syntax, Expr::WhileExpr(it) => &it.syntax, @@ -4150,6 +4178,7 @@ impl AstNode for AnyHasAttrs { | RANGE_EXPR | REF_EXPR | RETURN_EXPR + | BECOME_EXPR | TRY_EXPR | TUPLE_EXPR | WHILE_EXPR @@ -4851,6 +4880,11 @@ impl std::fmt::Display for ReturnExpr { std::fmt::Display::fmt(self.syntax(), f) } } +impl std::fmt::Display for BecomeExpr { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + std::fmt::Display::fmt(self.syntax(), f) + } +} impl std::fmt::Display for TryExpr { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { std::fmt::Display::fmt(self.syntax(), f) diff --git a/crates/syntax/src/ast/prec.rs b/crates/syntax/src/ast/prec.rs index 9ddf5a0a98..9131cd2f17 100644 --- a/crates/syntax/src/ast/prec.rs +++ b/crates/syntax/src/ast/prec.rs @@ -130,8 +130,8 @@ impl Expr { // ContinueExpr(_) => (0, 0), - ClosureExpr(_) | ReturnExpr(_) | YieldExpr(_) | YeetExpr(_) | BreakExpr(_) - | OffsetOfExpr(_) | FormatArgsExpr(_) | AsmExpr(_) => (0, 1), + ClosureExpr(_) | ReturnExpr(_) | BecomeExpr(_) | YieldExpr(_) | YeetExpr(_) + | BreakExpr(_) | OffsetOfExpr(_) | FormatArgsExpr(_) | AsmExpr(_) => (0, 1), RangeExpr(_) => (5, 5), @@ -288,6 +288,7 @@ impl Expr { PrefixExpr(e) => e.op_token(), RefExpr(e) => e.amp_token(), ReturnExpr(e) => e.return_token(), + BecomeExpr(e) => e.become_token(), TryExpr(e) => e.question_mark_token(), YieldExpr(e) => e.yield_token(), YeetExpr(e) => e.do_token(), @@ -316,7 +317,8 @@ impl Expr { // For BinExpr and RangeExpr this is technically wrong -- the child can be on the left... BinExpr(_) | RangeExpr(_) | BreakExpr(_) | ContinueExpr(_) | PrefixExpr(_) - | RefExpr(_) | ReturnExpr(_) | YieldExpr(_) | YeetExpr(_) | LetExpr(_) => self + | RefExpr(_) | ReturnExpr(_) | BecomeExpr(_) | YieldExpr(_) | YeetExpr(_) + | LetExpr(_) => self .syntax() .parent() .and_then(Expr::cast) diff --git a/crates/syntax/src/tests/ast_src.rs b/crates/syntax/src/tests/ast_src.rs index 341bda892b..8221c57789 100644 --- a/crates/syntax/src/tests/ast_src.rs +++ b/crates/syntax/src/tests/ast_src.rs @@ -67,8 +67,9 @@ pub(crate) const KINDS_SRC: KindsSrc<'_> = KindsSrc { keywords: &[ "as", "async", "await", "box", "break", "const", "continue", "crate", "do", "dyn", "else", "enum", "extern", "false", "fn", "for", "if", "impl", "in", "let", "loop", "macro", - "match", "mod", "move", "mut", "pub", "ref", "return", "self", "Self", "static", "struct", - "super", "trait", "true", "try", "type", "unsafe", "use", "where", "while", "yield", + "match", "mod", "move", "mut", "pub", "ref", "return", "become", "self", "Self", "static", + "struct", "super", "trait", "true", "try", "type", "unsafe", "use", "where", "while", + "yield", ], contextual_keywords: &[ "auto", @@ -154,6 +155,7 @@ pub(crate) const KINDS_SRC: KindsSrc<'_> = KindsSrc { "BLOCK_EXPR", "STMT_LIST", "RETURN_EXPR", + "BECOME_EXPR", "YIELD_EXPR", "YEET_EXPR", "LET_EXPR", |