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Auto merge of rust-lang#91692 - matthiaskrgr:rollup-u7dvh0n, r=matthi…
…askrgr Rollup of 6 pull requests Successful merges: - rust-lang#87599 (Implement concat_bytes!) - rust-lang#89999 (Update std::env::temp_dir to use GetTempPath2 on Windows when available.) - rust-lang#90796 (Remove the reg_thumb register class for asm! on ARM) - rust-lang#91042 (Use Vec extend instead of repeated pushes on several places) - rust-lang#91634 (Do not attempt to suggest help for overly malformed struct/function call) - rust-lang#91685 (Install llvm tools to sysroot when assembling local toolchain) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| use rustc_ast as ast; | ||
| use rustc_ast::{ptr::P, tokenstream::TokenStream}; | ||
| use rustc_data_structures::sync::Lrc; | ||
| use rustc_errors::Applicability; | ||
| use rustc_expand::base::{self, DummyResult}; | ||
|
|
||
| /// Emits errors for literal expressions that are invalid inside and outside of an array. | ||
| fn invalid_type_err(cx: &mut base::ExtCtxt<'_>, expr: &P<rustc_ast::Expr>, is_nested: bool) { | ||
| let lit = if let ast::ExprKind::Lit(lit) = &expr.kind { | ||
| lit | ||
| } else { | ||
| unreachable!(); | ||
| }; | ||
| match lit.kind { | ||
| ast::LitKind::Char(_) => { | ||
| let mut err = cx.struct_span_err(expr.span, "cannot concatenate character literals"); | ||
| if let Ok(snippet) = cx.sess.source_map().span_to_snippet(expr.span) { | ||
| err.span_suggestion( | ||
| expr.span, | ||
| "try using a byte character", | ||
| format!("b{}", snippet), | ||
| Applicability::MachineApplicable, | ||
| ) | ||
| .emit(); | ||
| } | ||
| } | ||
| ast::LitKind::Str(_, _) => { | ||
| let mut err = cx.struct_span_err(expr.span, "cannot concatenate string literals"); | ||
| // suggestion would be invalid if we are nested | ||
| if !is_nested { | ||
| if let Ok(snippet) = cx.sess.source_map().span_to_snippet(expr.span) { | ||
| err.span_suggestion( | ||
| expr.span, | ||
| "try using a byte string", | ||
| format!("b{}", snippet), | ||
| Applicability::MachineApplicable, | ||
| ); | ||
| } | ||
| } | ||
| err.emit(); | ||
| } | ||
| ast::LitKind::Float(_, _) => { | ||
| cx.span_err(expr.span, "cannot concatenate float literals"); | ||
| } | ||
| ast::LitKind::Bool(_) => { | ||
| cx.span_err(expr.span, "cannot concatenate boolean literals"); | ||
| } | ||
| ast::LitKind::Err(_) => {} | ||
| ast::LitKind::Int(_, _) if !is_nested => { | ||
| let mut err = cx.struct_span_err(expr.span, "cannot concatenate numeric literals"); | ||
| if let Ok(snippet) = cx.sess.source_map().span_to_snippet(expr.span) { | ||
| err.span_suggestion( | ||
| expr.span, | ||
| "try wrapping the number in an array", | ||
| format!("[{}]", snippet), | ||
| Applicability::MachineApplicable, | ||
| ); | ||
| } | ||
| err.emit(); | ||
| } | ||
| ast::LitKind::Int( | ||
| val, | ||
| ast::LitIntType::Unsuffixed | ast::LitIntType::Unsigned(ast::UintTy::U8), | ||
| ) => { | ||
| assert!(val > u8::MAX.into()); // must be an error | ||
| cx.span_err(expr.span, "numeric literal is out of bounds"); | ||
| } | ||
| ast::LitKind::Int(_, _) => { | ||
| cx.span_err(expr.span, "numeric literal is not a `u8`"); | ||
| } | ||
| _ => unreachable!(), | ||
| } | ||
| } | ||
|
|
||
| pub fn expand_concat_bytes( | ||
| cx: &mut base::ExtCtxt<'_>, | ||
| sp: rustc_span::Span, | ||
| tts: TokenStream, | ||
| ) -> Box<dyn base::MacResult + 'static> { | ||
| let es = match base::get_exprs_from_tts(cx, sp, tts) { | ||
| Some(e) => e, | ||
| None => return DummyResult::any(sp), | ||
| }; | ||
| let mut accumulator = Vec::new(); | ||
| let mut missing_literals = vec![]; | ||
| let mut has_errors = false; | ||
| for e in es { | ||
| match e.kind { | ||
| ast::ExprKind::Array(ref exprs) => { | ||
| for expr in exprs { | ||
| match expr.kind { | ||
| ast::ExprKind::Array(_) => { | ||
| if !has_errors { | ||
| cx.span_err(expr.span, "cannot concatenate doubly nested array"); | ||
| } | ||
| has_errors = true; | ||
| } | ||
| ast::ExprKind::Lit(ref lit) => match lit.kind { | ||
| ast::LitKind::Int( | ||
| val, | ||
| ast::LitIntType::Unsuffixed | ||
| | ast::LitIntType::Unsigned(ast::UintTy::U8), | ||
| ) if val <= u8::MAX.into() => { | ||
| accumulator.push(val as u8); | ||
| } | ||
|
|
||
| ast::LitKind::Byte(val) => { | ||
| accumulator.push(val); | ||
| } | ||
| ast::LitKind::ByteStr(_) => { | ||
| if !has_errors { | ||
| cx.struct_span_err( | ||
| expr.span, | ||
| "cannot concatenate doubly nested array", | ||
| ) | ||
| .note("byte strings are treated as arrays of bytes") | ||
| .help("try flattening the array") | ||
| .emit(); | ||
| } | ||
| has_errors = true; | ||
| } | ||
| _ => { | ||
| if !has_errors { | ||
| invalid_type_err(cx, expr, true); | ||
| } | ||
| has_errors = true; | ||
| } | ||
| }, | ||
| _ => { | ||
| missing_literals.push(expr.span); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| ast::ExprKind::Lit(ref lit) => match lit.kind { | ||
| ast::LitKind::Byte(val) => { | ||
| accumulator.push(val); | ||
| } | ||
| ast::LitKind::ByteStr(ref bytes) => { | ||
| accumulator.extend_from_slice(&bytes); | ||
| } | ||
| _ => { | ||
| if !has_errors { | ||
| invalid_type_err(cx, &e, false); | ||
| } | ||
| has_errors = true; | ||
| } | ||
| }, | ||
| ast::ExprKind::Err => { | ||
| has_errors = true; | ||
| } | ||
| _ => { | ||
| missing_literals.push(e.span); | ||
| } | ||
| } | ||
| } | ||
| if !missing_literals.is_empty() { | ||
| let mut err = cx.struct_span_err(missing_literals.clone(), "expected a byte literal"); | ||
| err.note("only byte literals (like `b\"foo\"`, `b's'`, and `[3, 4, 5]`) can be passed to `concat_bytes!()`"); | ||
| err.emit(); | ||
| return base::MacEager::expr(DummyResult::raw_expr(sp, true)); | ||
| } else if has_errors { | ||
| return base::MacEager::expr(DummyResult::raw_expr(sp, true)); | ||
| } | ||
| let sp = cx.with_def_site_ctxt(sp); | ||
| base::MacEager::expr(cx.expr_lit(sp, ast::LitKind::ByteStr(Lrc::from(accumulator)))) | ||
| } |
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