Rollup merge of #134956 - compiler-errors:format-args-hidden-chars, r=jieyouxu
Account for C string literals and `format_args` in `HiddenUnicodeCodepoints` lint This is stacked on #134955, and either that can land first or both of them can land together here. I split this out because this is a bit more involved of an impl. Fixes #94945
This commit is contained in:
Matthias Krüger
GitHub
commit
0c94f631d8
9 changed files with 157 additions and 42 deletions
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@ -4,6 +4,7 @@ use rustc_span::{Ident, Span, Symbol};
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use crate::Expr;
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use crate::ptr::P;
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use crate::token::LitKind;
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// Definitions:
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//
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@ -45,6 +46,10 @@ pub struct FormatArgs {
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pub span: Span,
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pub template: Vec<FormatArgsPiece>,
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pub arguments: FormatArguments,
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/// The raw, un-split format string literal, with no escaping or processing.
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///
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/// Generally only useful for lints that care about the raw bytes the user wrote.
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pub uncooked_fmt_str: (LitKind, Symbol),
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}
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/// A piece of a format template string.
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@ -1596,7 +1596,7 @@ fn walk_inline_asm_sym<T: MutVisitor>(
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fn walk_format_args<T: MutVisitor>(vis: &mut T, fmt: &mut FormatArgs) {
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// FIXME: visit the template exhaustively.
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let FormatArgs { span, template: _, arguments } = fmt;
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let FormatArgs { span, template: _, arguments, uncooked_fmt_str: _ } = fmt;
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for FormatArgument { kind, expr } in arguments.all_args_mut() {
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match kind {
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FormatArgumentKind::Named(ident) | FormatArgumentKind::Captured(ident) => {
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@ -1061,7 +1061,7 @@ pub fn walk_inline_asm_sym<'a, V: Visitor<'a>>(
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}
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pub fn walk_format_args<'a, V: Visitor<'a>>(visitor: &mut V, fmt: &'a FormatArgs) -> V::Result {
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let FormatArgs { span: _, template: _, arguments } = fmt;
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let FormatArgs { span: _, template: _, arguments, uncooked_fmt_str: _ } = fmt;
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for FormatArgument { kind, expr } in arguments.all_args() {
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match kind {
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FormatArgumentKind::Named(ident) | FormatArgumentKind::Captured(ident) => {
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@ -16,7 +16,7 @@ use smallvec::smallvec;
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use {rustc_ast as ast, rustc_parse_format as parse};
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use crate::errors;
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use crate::util::expr_to_spanned_string;
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use crate::util::{ExprToSpannedString, expr_to_spanned_string};
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pub struct AsmArgs {
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pub templates: Vec<P<ast::Expr>>,
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@ -527,7 +527,12 @@ fn expand_preparsed_asm(
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let msg = "asm template must be a string literal";
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let template_sp = template_expr.span;
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let template_is_mac_call = matches!(template_expr.kind, ast::ExprKind::MacCall(_));
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let (template_str, template_style, template_span) = {
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let ExprToSpannedString {
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symbol: template_str,
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style: template_style,
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span: template_span,
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..
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} = {
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let ExpandResult::Ready(mac) = expr_to_spanned_string(ecx, template_expr, msg) else {
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return ExpandResult::Retry(());
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};
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@ -17,7 +17,7 @@ use rustc_parse_format as parse;
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use rustc_span::{BytePos, ErrorGuaranteed, Ident, InnerSpan, Span, Symbol};
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use crate::errors;
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use crate::util::expr_to_spanned_string;
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use crate::util::{ExprToSpannedString, expr_to_spanned_string};
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// The format_args!() macro is expanded in three steps:
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// 1. First, `parse_args` will parse the `(literal, arg, arg, name=arg, name=arg)` syntax,
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@ -166,13 +166,18 @@ fn make_format_args(
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let MacroInput { fmtstr: efmt, mut args, is_direct_literal } = input;
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let (fmt_str, fmt_style, fmt_span) = {
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let ExprToSpannedString {
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symbol: fmt_str,
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span: fmt_span,
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style: fmt_style,
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uncooked_symbol: uncooked_fmt_str,
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} = {
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let ExpandResult::Ready(mac) = expr_to_spanned_string(ecx, efmt.clone(), msg) else {
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return ExpandResult::Retry(());
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};
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match mac {
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Ok(mut fmt) if append_newline => {
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fmt.0 = Symbol::intern(&format!("{}\n", fmt.0));
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fmt.symbol = Symbol::intern(&format!("{}\n", fmt.symbol));
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fmt
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}
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Ok(fmt) => fmt,
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@ -584,7 +589,12 @@ fn make_format_args(
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}
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}
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ExpandResult::Ready(Ok(FormatArgs { span: fmt_span, template, arguments: args }))
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ExpandResult::Ready(Ok(FormatArgs {
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span: fmt_span,
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template,
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arguments: args,
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uncooked_fmt_str,
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}))
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}
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fn invalid_placeholder_type_error(
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@ -57,7 +57,17 @@ pub(crate) fn warn_on_duplicate_attribute(ecx: &ExtCtxt<'_>, item: &Annotatable,
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/// `Ok` represents successfully retrieving the string literal at the correct
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/// position, e.g., `println("abc")`.
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type ExprToSpannedStringResult<'a> = Result<(Symbol, ast::StrStyle, Span), UnexpectedExprKind<'a>>;
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pub(crate) type ExprToSpannedStringResult<'a> = Result<ExprToSpannedString, UnexpectedExprKind<'a>>;
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pub(crate) struct ExprToSpannedString {
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pub symbol: Symbol,
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pub style: ast::StrStyle,
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pub span: Span,
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/// The raw string literal, with no escaping or processing.
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///
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/// Generally only useful for lints that care about the raw bytes the user wrote.
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pub uncooked_symbol: (ast::token::LitKind, Symbol),
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}
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/// - `Ok` is returned when the conversion to a string literal is unsuccessful,
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/// but another type of expression is obtained instead.
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@ -90,7 +100,12 @@ pub(crate) fn expr_to_spanned_string<'a>(
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ExpandResult::Ready(Err(match expr.kind {
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ast::ExprKind::Lit(token_lit) => match ast::LitKind::from_token_lit(token_lit) {
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Ok(ast::LitKind::Str(s, style)) => {
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return ExpandResult::Ready(Ok((s, style, expr.span)));
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return ExpandResult::Ready(Ok(ExprToSpannedString {
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symbol: s,
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style,
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span: expr.span,
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uncooked_symbol: (token_lit.kind, token_lit.symbol),
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}));
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}
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Ok(ast::LitKind::ByteStr(..)) => {
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let mut err = cx.dcx().struct_span_err(expr.span, err_msg);
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@ -128,7 +143,7 @@ pub(crate) fn expr_to_string(
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Ok((err, _)) => err.emit(),
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Err(guar) => guar,
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})
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.map(|(symbol, style, _)| (symbol, style))
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.map(|ExprToSpannedString { symbol, style, .. }| (symbol, style))
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})
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}
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@ -183,7 +198,7 @@ pub(crate) fn get_single_str_spanned_from_tts(
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Ok((err, _)) => err.emit(),
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Err(guar) => guar,
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})
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.map(|(symbol, _style, span)| (symbol, span))
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.map(|ExprToSpannedString { symbol, span, .. }| (symbol, span))
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})
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}
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@ -82,7 +82,36 @@ impl HiddenUnicodeCodepoints {
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sub,
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});
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}
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fn check_literal(
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&mut self,
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cx: &EarlyContext<'_>,
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text: Symbol,
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lit_kind: ast::token::LitKind,
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span: Span,
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label: &'static str,
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) {
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if !contains_text_flow_control_chars(text.as_str()) {
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return;
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}
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let (padding, point_at_inner_spans) = match lit_kind {
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// account for `"` or `'`
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ast::token::LitKind::Str | ast::token::LitKind::Char => (1, true),
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// account for `c"`
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ast::token::LitKind::CStr => (2, true),
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// account for `r###"`
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ast::token::LitKind::StrRaw(n) => (n as u32 + 2, true),
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// account for `cr###"`
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ast::token::LitKind::CStrRaw(n) => (n as u32 + 3, true),
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// suppress bad literals.
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ast::token::LitKind::Err(_) => return,
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// Be conservative just in case new literals do support these.
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_ => (0, false),
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};
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self.lint_text_direction_codepoint(cx, text, span, padding, point_at_inner_spans, label);
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}
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}
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impl EarlyLintPass for HiddenUnicodeCodepoints {
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fn check_attribute(&mut self, cx: &EarlyContext<'_>, attr: &ast::Attribute) {
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if let ast::AttrKind::DocComment(_, comment) = attr.kind {
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@ -97,18 +126,11 @@ impl EarlyLintPass for HiddenUnicodeCodepoints {
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// byte strings are already handled well enough by `EscapeError::NonAsciiCharInByteString`
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match &expr.kind {
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ast::ExprKind::Lit(token_lit) => {
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let text = token_lit.symbol;
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if !contains_text_flow_control_chars(text.as_str()) {
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return;
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self.check_literal(cx, token_lit.symbol, token_lit.kind, expr.span, "literal");
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}
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let padding = match token_lit.kind {
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// account for `"` or `'`
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ast::token::LitKind::Str | ast::token::LitKind::Char => 1,
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// account for `r###"`
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ast::token::LitKind::StrRaw(n) => n as u32 + 2,
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_ => return,
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};
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self.lint_text_direction_codepoint(cx, text, expr.span, padding, true, "literal");
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ast::ExprKind::FormatArgs(args) => {
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let (lit_kind, text) = args.uncooked_fmt_str;
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self.check_literal(cx, text, lit_kind, args.span, "format string");
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}
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_ => {}
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};
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@ -1,3 +1,5 @@
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//@ edition: 2021
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fn main() {
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// if access_level != "user" { // Check if admin
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//~^ ERROR unicode codepoint changing visible direction of text present in comment
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@ -25,6 +27,14 @@ fn main() {
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//~| ERROR non-ASCII character in raw byte string literal
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println!("{:?}", '');
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//~^ ERROR unicode codepoint changing visible direction of text present in literal
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let _ = c"";
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//~^ ERROR unicode codepoint changing visible direction of text present in literal
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let _ = cr#""#;
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//~^ ERROR unicode codepoint changing visible direction of text present in literal
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println!("{{}}");
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//~^ ERROR unicode codepoint changing visible direction of text present in format string
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}
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//"/* } if isAdmin begin admins only */"
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@ -1,5 +1,5 @@
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error: unicode escape in byte string
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--> $DIR/unicode-control-codepoints.rs:6:26
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--> $DIR/unicode-control-codepoints.rs:8:26
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LL | println!("{:?}", b"us\u{202B}e\u{202A}r");
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| ^^^^^^^^ unicode escape in byte string
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@ -7,7 +7,7 @@ LL | println!("{:?}", b"us\u{202B}e\u{202A}r");
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= help: unicode escape sequences cannot be used as a byte or in a byte string
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error: unicode escape in byte string
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--> $DIR/unicode-control-codepoints.rs:6:35
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--> $DIR/unicode-control-codepoints.rs:8:35
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LL | println!("{:?}", b"us\u{202B}e\u{202A}r");
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| ^^^^^^^^ unicode escape in byte string
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@ -15,7 +15,7 @@ LL | println!("{:?}", b"us\u{202B}e\u{202A}r");
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= help: unicode escape sequences cannot be used as a byte or in a byte string
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error: non-ASCII character in byte string literal
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--> $DIR/unicode-control-codepoints.rs:16:26
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--> $DIR/unicode-control-codepoints.rs:18:26
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LL | println!("{:?}", b"/*<2A> } <20>if isAdmin<69> <20> begin admins only ");
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| ^ must be ASCII but is '\u{202e}'
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@ -26,7 +26,7 @@ LL | println!("{:?}", b"/*\xE2\x80\xAE } <20>if isAdmin<69> <20> begin admins o
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| ~~~~~~~~~~~~
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error: non-ASCII character in byte string literal
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--> $DIR/unicode-control-codepoints.rs:16:30
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--> $DIR/unicode-control-codepoints.rs:18:30
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LL | println!("{:?}", b"/*<2A> } <20>if isAdmin<69> <20> begin admins only ");
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| ^ must be ASCII but is '\u{2066}'
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@ -37,7 +37,7 @@ LL | println!("{:?}", b"/*<2A> } \xE2\x81\xA6if isAdmin<69> <20> begin admins o
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| ~~~~~~~~~~~~
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error: non-ASCII character in byte string literal
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--> $DIR/unicode-control-codepoints.rs:16:41
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--> $DIR/unicode-control-codepoints.rs:18:41
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LL | println!("{:?}", b"/*<2A> } <20>if isAdmin<69> <20> begin admins only ");
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| ^ must be ASCII but is '\u{2069}'
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@ -48,7 +48,7 @@ LL | println!("{:?}", b"/*<2A> } <20>if isAdmin\xE2\x81\xA9 <20> begin admins o
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| ~~~~~~~~~~~~
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error: non-ASCII character in byte string literal
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--> $DIR/unicode-control-codepoints.rs:16:43
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--> $DIR/unicode-control-codepoints.rs:18:43
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LL | println!("{:?}", b"/*<2A> } <20>if isAdmin<69> <20> begin admins only ");
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| ^ must be ASCII but is '\u{2066}'
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@ -59,31 +59,31 @@ LL | println!("{:?}", b"/*<2A> } <20>if isAdmin<69> \xE2\x81\xA6 begin admins o
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| ~~~~~~~~~~~~
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error: non-ASCII character in raw byte string literal
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--> $DIR/unicode-control-codepoints.rs:21:29
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--> $DIR/unicode-control-codepoints.rs:23:29
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LL | println!("{:?}", br##"/*<2A> } <20>if isAdmin<69> <20> begin admins only "##);
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| ^ must be ASCII but is '\u{202e}'
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error: non-ASCII character in raw byte string literal
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--> $DIR/unicode-control-codepoints.rs:21:33
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--> $DIR/unicode-control-codepoints.rs:23:33
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LL | println!("{:?}", br##"/*<2A> } <20>if isAdmin<69> <20> begin admins only "##);
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| ^ must be ASCII but is '\u{2066}'
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error: non-ASCII character in raw byte string literal
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--> $DIR/unicode-control-codepoints.rs:21:44
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--> $DIR/unicode-control-codepoints.rs:23:44
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|
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LL | println!("{:?}", br##"/*<2A> } <20>if isAdmin<69> <20> begin admins only "##);
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| ^ must be ASCII but is '\u{2069}'
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error: non-ASCII character in raw byte string literal
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--> $DIR/unicode-control-codepoints.rs:21:46
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--> $DIR/unicode-control-codepoints.rs:23:46
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|
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LL | println!("{:?}", br##"/*<2A> } <20>if isAdmin<69> <20> begin admins only "##);
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| ^ must be ASCII but is '\u{2066}'
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error: unicode codepoint changing visible direction of text present in comment
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--> $DIR/unicode-control-codepoints.rs:2:5
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--> $DIR/unicode-control-codepoints.rs:4:5
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|
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LL | // if access_level != "us<75>e<EFBFBD>r" { // Check if admin
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| ^^^^^^^^^^^^^^^^^^^^^^^^^-^-^^^^^^^^^^^^^^^^^^^^^^
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@ -97,7 +97,7 @@ LL | // if access_level != "us<75>e<EFBFBD>r" { // Check if admin
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= help: if their presence wasn't intentional, you can remove them
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error: unicode codepoint changing visible direction of text present in comment
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--> $DIR/unicode-control-codepoints.rs:30:1
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--> $DIR/unicode-control-codepoints.rs:40:1
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LL | //"/*<2A> } <20>if isAdmin<69> <20> begin admins only */"
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| ^^^^^-^^^-^^^^^^^^^^-^-^^^^^^^^^^^^^^^^^^^^^^
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@ -112,7 +112,7 @@ LL | //"/*<2A> } <20>if isAdmin<69> <20> begin admins only */"
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= help: if their presence wasn't intentional, you can remove them
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error: unicode codepoint changing visible direction of text present in literal
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--> $DIR/unicode-control-codepoints.rs:11:22
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--> $DIR/unicode-control-codepoints.rs:13:22
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|
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LL | println!("{:?}", "/*<2A> } <20>if isAdmin<69> <20> begin admins only ");
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| ^^^-^^^-^^^^^^^^^^-^-^^^^^^^^^^^^^^^^^^^^
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@ -132,7 +132,7 @@ LL | println!("{:?}", "/*\u{202e} } \u{2066}if isAdmin\u{2069} \u{2066} begi
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| ~~~~~~~~ ~~~~~~~~ ~~~~~~~~ ~~~~~~~~
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error: unicode codepoint changing visible direction of text present in literal
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--> $DIR/unicode-control-codepoints.rs:14:22
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--> $DIR/unicode-control-codepoints.rs:16:22
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|
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LL | println!("{:?}", r##"/*<2A> } <20>if isAdmin<69> <20> begin admins only "##);
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| ^^^^^^-^^^-^^^^^^^^^^-^-^^^^^^^^^^^^^^^^^^^^^^
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@ -151,7 +151,7 @@ LL | println!("{:?}", r##"/*\u{202e} } \u{2066}if isAdmin\u{2069} \u{2066} b
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| ~~~~~~~~ ~~~~~~~~ ~~~~~~~~ ~~~~~~~~
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error: unicode codepoint changing visible direction of text present in literal
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--> $DIR/unicode-control-codepoints.rs:26:22
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--> $DIR/unicode-control-codepoints.rs:28:22
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|
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LL | println!("{:?}", '<27>');
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| ^-^
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@ -166,8 +166,56 @@ help: if you want to keep them but make them visible in your source code, you ca
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LL | println!("{:?}", '\u{202e}');
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| ~~~~~~~~
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|
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error: unicode codepoint changing visible direction of text present in literal
|
||||
--> $DIR/unicode-control-codepoints.rs:31:13
|
||||
|
|
||||
LL | let _ = c"<22>";
|
||||
| ^^-^
|
||||
| | |
|
||||
| | '\u{202e}'
|
||||
| this literal contains an invisible unicode text flow control codepoint
|
||||
|
|
||||
= note: these kind of unicode codepoints change the way text flows on applications that support them, but can cause confusion because they change the order of characters on the screen
|
||||
= help: if their presence wasn't intentional, you can remove them
|
||||
help: if you want to keep them but make them visible in your source code, you can escape them
|
||||
|
|
||||
LL | let _ = c"\u{202e}";
|
||||
| ~~~~~~~~
|
||||
|
||||
error: unicode codepoint changing visible direction of text present in literal
|
||||
--> $DIR/unicode-control-codepoints.rs:33:13
|
||||
|
|
||||
LL | let _ = cr#"<22>"#;
|
||||
| ^^^^-^^
|
||||
| | |
|
||||
| | '\u{202e}'
|
||||
| this literal contains an invisible unicode text flow control codepoint
|
||||
|
|
||||
= note: these kind of unicode codepoints change the way text flows on applications that support them, but can cause confusion because they change the order of characters on the screen
|
||||
= help: if their presence wasn't intentional, you can remove them
|
||||
help: if you want to keep them but make them visible in your source code, you can escape them
|
||||
|
|
||||
LL | let _ = cr#"\u{202e}"#;
|
||||
| ~~~~~~~~
|
||||
|
||||
error: unicode codepoint changing visible direction of text present in format string
|
||||
--> $DIR/unicode-control-codepoints.rs:36:14
|
||||
|
|
||||
LL | println!("{{<7B>}}");
|
||||
| ^^^-^^^
|
||||
| | |
|
||||
| | '\u{202e}'
|
||||
| this format string contains an invisible unicode text flow control codepoint
|
||||
|
|
||||
= note: these kind of unicode codepoints change the way text flows on applications that support them, but can cause confusion because they change the order of characters on the screen
|
||||
= help: if their presence wasn't intentional, you can remove them
|
||||
help: if you want to keep them but make them visible in your source code, you can escape them
|
||||
|
|
||||
LL | println!("{{\u{202e}}}");
|
||||
| ~~~~~~~~
|
||||
|
||||
error: unicode codepoint changing visible direction of text present in doc comment
|
||||
--> $DIR/unicode-control-codepoints.rs:33:1
|
||||
--> $DIR/unicode-control-codepoints.rs:43:1
|
||||
|
|
||||
LL | /** '<27>'); */fn foo() {}
|
||||
| ^^^^^^^^^^^^^ this doc comment contains an invisible unicode text flow control codepoint
|
||||
|
|
@ -177,7 +225,7 @@ LL | /** '<27>'); */fn foo() {}
|
|||
= note: if you want to keep them but make them visible in your source code, you can escape them: '\u{202e}'
|
||||
|
||||
error: unicode codepoint changing visible direction of text present in doc comment
|
||||
--> $DIR/unicode-control-codepoints.rs:36:1
|
||||
--> $DIR/unicode-control-codepoints.rs:46:1
|
||||
|
|
||||
LL | / /**
|
||||
LL | | *
|
||||
|
|
@ -188,5 +236,5 @@ LL | | * '<27>'); */fn bar() {}
|
|||
= note: if their presence wasn't intentional, you can remove them
|
||||
= note: if you want to keep them but make them visible in your source code, you can escape them: '\u{202e}'
|
||||
|
||||
error: aborting due to 17 previous errors
|
||||
error: aborting due to 20 previous errors
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue