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Improve position named arguments lint underline and formatting names
For named arguments used as implicit position arguments, underline both
the opening curly brace and either:
* if there is formatting, the next character (which will either be the
closing curl brace or the `:` denoting the start of formatting args)
* if there is no formatting, the entire arg span (important if there is
whitespace like `{ }`)
This should make it more obvious where the named argument should be.
Additionally, in the lint message, emit the formatting argument names
without a dollar sign to avoid potentially confusion.
Fixes #99907
This commit is contained in:
Preston From
parent
9d5cd21a5d
commit
d0ea440dfe
@ -16,6 +16,7 @@ use smallvec::SmallVec;
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use rustc_lint_defs::builtin::NAMED_ARGUMENTS_USED_POSITIONALLY;
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use rustc_lint_defs::{BufferedEarlyLint, BuiltinLintDiagnostics, LintId};
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use rustc_parse_format::Count;
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use std::borrow::Cow;
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use std::collections::hash_map::Entry;
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@ -57,26 +58,47 @@ struct PositionalNamedArg {
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replacement: Symbol,
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/// The span for the positional named argument (so the lint can point a message to it)
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positional_named_arg_span: Span,
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has_formatting: bool,
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}
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impl PositionalNamedArg {
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/// Determines what span to replace with the name of the named argument
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fn get_span_to_replace(&self, cx: &Context<'_, '_>) -> Option<Span> {
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/// Determines:
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/// 1) span to be replaced with the name of the named argument and
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/// 2) span to be underlined for error messages
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fn get_positional_arg_spans(&self, cx: &Context<'_, '_>) -> (Option<Span>, Option<Span>) {
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if let Some(inner_span) = &self.inner_span_to_replace {
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return Some(
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cx.fmtsp.from_inner(InnerSpan { start: inner_span.start, end: inner_span.end }),
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);
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let span =
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cx.fmtsp.from_inner(InnerSpan { start: inner_span.start, end: inner_span.end });
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(Some(span), Some(span))
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} else if self.ty == PositionalNamedArgType::Arg {
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// In the case of a named argument whose position is implicit, there will not be a span
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// to replace. Instead, we insert the name after the `{`, which is the first character
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// of arg_span.
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return cx
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.arg_spans
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.get(self.cur_piece)
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.map(|arg_span| arg_span.with_lo(arg_span.lo() + BytePos(1)).shrink_to_lo());
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// In the case of a named argument whose position is implicit, if the argument *has*
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// formatting, there will not be a span to replace. Instead, we insert the name after
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// the `{`, which will be the first character of arg_span. If the argument does *not*
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// have formatting, there may or may not be a span to replace. This is because
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// whitespace is allowed in arguments without formatting (such as `format!("{ }", 1);`)
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// but is not allowed in arguments with formatting (an error will be generated in cases
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// like `format!("{ :1.1}", 1.0f32);`.
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// For the message span, if there is formatting, we want to use the opening `{` and the
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// next character, which will the `:` indicating the start of formatting. If there is
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// not any formatting, we want to underline the entire span.
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if self.has_formatting {
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cx.arg_spans.get(self.cur_piece).map_or((None, None), |arg_span| {
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(
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Some(arg_span.with_lo(arg_span.lo() + BytePos(1)).shrink_to_lo()),
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Some(arg_span.with_hi(arg_span.lo() + BytePos(2))),
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)
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})
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} else {
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cx.arg_spans.get(self.cur_piece).map_or((None, None), |arg_span| {
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let replace_start = arg_span.lo() + BytePos(1);
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let replace_end = arg_span.hi() - BytePos(1);
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let to_replace = arg_span.with_lo(replace_start).with_hi(replace_end);
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(Some(to_replace), Some(*arg_span))
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})
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}
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} else {
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(None, None)
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}
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None
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}
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}
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@ -117,10 +139,18 @@ impl PositionalNamedArgsLint {
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cur_piece: usize,
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inner_span_to_replace: Option<rustc_parse_format::InnerSpan>,
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names: &FxHashMap<Symbol, (usize, Span)>,
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has_formatting: bool,
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) {
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let start_of_named_args = total_args_length - names.len();
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if current_positional_arg >= start_of_named_args {
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self.maybe_push(format_argument_index, ty, cur_piece, inner_span_to_replace, names)
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self.maybe_push(
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format_argument_index,
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ty,
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cur_piece,
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inner_span_to_replace,
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names,
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has_formatting,
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)
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}
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}
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@ -134,6 +164,7 @@ impl PositionalNamedArgsLint {
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cur_piece: usize,
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inner_span_to_replace: Option<rustc_parse_format::InnerSpan>,
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names: &FxHashMap<Symbol, (usize, Span)>,
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has_formatting: bool,
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) {
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let named_arg = names
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.iter()
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@ -156,6 +187,7 @@ impl PositionalNamedArgsLint {
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inner_span_to_replace,
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replacement,
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positional_named_arg_span,
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has_formatting,
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});
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}
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}
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@ -414,6 +446,9 @@ impl<'a, 'b> Context<'a, 'b> {
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PositionalNamedArgType::Precision,
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);
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let has_precision = arg.format.precision != Count::CountImplied;
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let has_width = arg.format.width != Count::CountImplied;
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// argument second, if it's an implicit positional parameter
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// it's written second, so it should come after width/precision.
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let pos = match arg.position {
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@ -426,6 +461,7 @@ impl<'a, 'b> Context<'a, 'b> {
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self.curpiece,
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arg_end,
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&self.names,
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has_precision || has_width,
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);
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Exact(i)
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@ -439,6 +475,7 @@ impl<'a, 'b> Context<'a, 'b> {
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self.curpiece,
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None,
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&self.names,
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has_precision || has_width,
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);
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Exact(i)
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}
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@ -529,6 +566,7 @@ impl<'a, 'b> Context<'a, 'b> {
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self.curpiece,
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*inner_span,
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&self.names,
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true,
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);
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self.verify_arg_type(Exact(i), Count);
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}
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@ -1150,24 +1188,22 @@ pub fn expand_format_args_nl<'cx>(
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fn create_lints_for_named_arguments_used_positionally(cx: &mut Context<'_, '_>) {
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for named_arg in &cx.unused_names_lint.positional_named_args {
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let arg_span = named_arg.get_span_to_replace(cx);
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let (position_sp_to_replace, position_sp_for_msg) = named_arg.get_positional_arg_spans(cx);
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let msg = format!("named argument `{}` is not used by name", named_arg.replacement);
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let replacement = match named_arg.ty {
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PositionalNamedArgType::Arg => named_arg.replacement.to_string(),
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_ => named_arg.replacement.to_string() + "$",
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};
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cx.ecx.buffered_early_lint.push(BufferedEarlyLint {
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span: MultiSpan::from_span(named_arg.positional_named_arg_span),
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msg: msg.clone(),
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node_id: ast::CRATE_NODE_ID,
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lint_id: LintId::of(&NAMED_ARGUMENTS_USED_POSITIONALLY),
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diagnostic: BuiltinLintDiagnostics::NamedArgumentUsedPositionally(
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arg_span,
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named_arg.positional_named_arg_span,
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replacement,
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),
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diagnostic: BuiltinLintDiagnostics::NamedArgumentUsedPositionally {
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position_sp_to_replace,
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position_sp_for_msg,
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named_arg_sp: named_arg.positional_named_arg_span,
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named_arg_name: named_arg.replacement.to_string(),
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is_formatting_arg: named_arg.ty != PositionalNamedArgType::Arg,
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},
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});
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}
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}
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@ -856,13 +856,18 @@ pub trait LintContext: Sized {
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Applicability::MachineApplicable,
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);
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},
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BuiltinLintDiagnostics::NamedArgumentUsedPositionally(positional_arg, named_arg, name) => {
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db.span_label(named_arg, "this named argument is only referred to by position in formatting string");
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if let Some(positional_arg) = positional_arg {
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let msg = format!("this formatting argument uses named argument `{}` by position", name);
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db.span_label(positional_arg, msg);
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BuiltinLintDiagnostics::NamedArgumentUsedPositionally{ position_sp_to_replace, position_sp_for_msg, named_arg_sp, named_arg_name, is_formatting_arg} => {
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db.span_label(named_arg_sp, "this named argument is referred to by position in formatting string");
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if let Some(positional_arg_for_msg) = position_sp_for_msg {
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let msg = format!("this formatting argument uses named argument `{}` by position", named_arg_name);
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db.span_label(positional_arg_for_msg, msg);
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}
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if let Some(positional_arg_to_replace) = position_sp_to_replace {
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let name = if is_formatting_arg { named_arg_name + "$" } else { named_arg_name };
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db.span_suggestion_verbose(
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positional_arg,
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positional_arg_to_replace,
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"use the named argument by name to avoid ambiguity",
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name,
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Applicability::MaybeIncorrect,
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@ -467,7 +467,19 @@ pub enum BuiltinLintDiagnostics {
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/// If true, the lifetime will be fully elided.
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use_span: Option<(Span, bool)>,
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},
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NamedArgumentUsedPositionally(Option<Span>, Span, String),
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NamedArgumentUsedPositionally {
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/// Span where the named argument is used by position and will be replaced with the named
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/// argument name
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position_sp_to_replace: Option<Span>,
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/// Span where the named argument is used by position and is used for lint messages
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position_sp_for_msg: Option<Span>,
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/// Span where the named argument's name is (so we know where to put the warning message)
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named_arg_sp: Span,
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/// String containing the named arguments name
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named_arg_name: String,
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/// Indicates if the named argument is used as a width/precision for formatting
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is_formatting_arg: bool,
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},
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}
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/// Lints that are buffered up early on in the `Session` before the
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@ -2,9 +2,9 @@ warning: named argument `_x` is not used by name
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--> $DIR/issue-98466.rs:7:26
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LL | println!("_x is {}", _x = 5);
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| - ^^ this named argument is only referred to by position in formatting string
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| this formatting argument uses named argument `_x` by position
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| -- ^^ this named argument is referred to by position in formatting string
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| this formatting argument uses named argument `_x` by position
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= note: `#[warn(named_arguments_used_positionally)]` on by default
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help: use the named argument by name to avoid ambiguity
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@ -16,9 +16,9 @@ warning: named argument `y` is not used by name
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--> $DIR/issue-98466.rs:10:26
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LL | println!("_x is {}", y = _x);
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| - ^ this named argument is only referred to by position in formatting string
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| this formatting argument uses named argument `y` by position
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| -- ^ this named argument is referred to by position in formatting string
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| this formatting argument uses named argument `y` by position
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help: use the named argument by name to avoid ambiguity
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@ -29,9 +29,9 @@ warning: named argument `y` is not used by name
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--> $DIR/issue-98466.rs:13:83
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LL | println!("first positional arg {}, second positional arg {}, _x is {}", 1, 2, y = _x);
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| - ^ this named argument is only referred to by position in formatting string
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| this formatting argument uses named argument `y` by position
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| -- ^ this named argument is referred to by position in formatting string
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| this formatting argument uses named argument `y` by position
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help: use the named argument by name to avoid ambiguity
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@ -42,9 +42,9 @@ warning: named argument `_x` is not used by name
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--> $DIR/issue-98466.rs:19:34
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LL | let _f = format!("_x is {}", _x = 5);
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| - ^^ this named argument is only referred to by position in formatting string
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| |
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| this formatting argument uses named argument `_x` by position
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| -- ^^ this named argument is referred to by position in formatting string
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| this formatting argument uses named argument `_x` by position
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help: use the named argument by name to avoid ambiguity
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@ -55,9 +55,9 @@ warning: named argument `y` is not used by name
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--> $DIR/issue-98466.rs:22:34
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LL | let _f = format!("_x is {}", y = _x);
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| - ^ this named argument is only referred to by position in formatting string
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| |
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| this formatting argument uses named argument `y` by position
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| -- ^ this named argument is referred to by position in formatting string
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| |
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| this formatting argument uses named argument `y` by position
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help: use the named argument by name to avoid ambiguity
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@ -68,9 +68,9 @@ warning: named argument `y` is not used by name
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--> $DIR/issue-98466.rs:25:91
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LL | let _f = format!("first positional arg {}, second positional arg {}, _x is {}", 1, 2, y = _x);
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| - ^ this named argument is only referred to by position in formatting string
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| |
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| this formatting argument uses named argument `y` by position
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| -- ^ this named argument is referred to by position in formatting string
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| |
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| this formatting argument uses named argument `y` by position
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help: use the named argument by name to avoid ambiguity
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@ -2,9 +2,9 @@ warning: named argument `a` is not used by name
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--> $DIR/issue-99265.rs:5:24
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LL | println!("{b} {}", a=1, b=2);
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| - ^ this named argument is only referred to by position in formatting string
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| |
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| this formatting argument uses named argument `a` by position
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| -- ^ this named argument is referred to by position in formatting string
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| this formatting argument uses named argument `a` by position
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= note: `#[warn(named_arguments_used_positionally)]` on by default
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help: use the named argument by name to avoid ambiguity
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@ -16,9 +16,9 @@ warning: named argument `a` is not used by name
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--> $DIR/issue-99265.rs:9:35
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LL | println!("{} {} {} {} {}", 0, a=1, b=2, c=3, d=4);
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| - ^ this named argument is only referred to by position in formatting string
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| |
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| this formatting argument uses named argument `a` by position
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| -- ^ this named argument is referred to by position in formatting string
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| |
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| this formatting argument uses named argument `a` by position
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help: use the named argument by name to avoid ambiguity
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@ -29,9 +29,9 @@ warning: named argument `b` is not used by name
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--> $DIR/issue-99265.rs:9:40
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|
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LL | println!("{} {} {} {} {}", 0, a=1, b=2, c=3, d=4);
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| - ^ this named argument is only referred to by position in formatting string
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| |
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| this formatting argument uses named argument `b` by position
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| -- ^ this named argument is referred to by position in formatting string
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| |
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| this formatting argument uses named argument `b` by position
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|
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help: use the named argument by name to avoid ambiguity
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|
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@ -42,9 +42,9 @@ warning: named argument `c` is not used by name
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--> $DIR/issue-99265.rs:9:45
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|
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LL | println!("{} {} {} {} {}", 0, a=1, b=2, c=3, d=4);
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| - ^ this named argument is only referred to by position in formatting string
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| |
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| this formatting argument uses named argument `c` by position
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| -- ^ this named argument is referred to by position in formatting string
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| |
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| this formatting argument uses named argument `c` by position
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|
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help: use the named argument by name to avoid ambiguity
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|
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@ -55,9 +55,9 @@ warning: named argument `d` is not used by name
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--> $DIR/issue-99265.rs:9:50
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|
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LL | println!("{} {} {} {} {}", 0, a=1, b=2, c=3, d=4);
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| - ^ this named argument is only referred to by position in formatting string
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| |
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| this formatting argument uses named argument `d` by position
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| -- ^ this named argument is referred to by position in formatting string
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| |
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| this formatting argument uses named argument `d` by position
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|
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help: use the named argument by name to avoid ambiguity
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|
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@ -68,9 +68,9 @@ warning: named argument `width` is not used by name
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--> $DIR/issue-99265.rs:19:35
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|
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LL | println!("Hello {:1$}!", "x", width = 5);
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| -- ^^^^^ this named argument is only referred to by position in formatting string
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| -- ^^^^^ this named argument is referred to by position in formatting string
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| |
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| this formatting argument uses named argument `width$` by position
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| this formatting argument uses named argument `width` by position
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|
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help: use the named argument by name to avoid ambiguity
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|
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@ -81,9 +81,9 @@ warning: named argument `width` is not used by name
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--> $DIR/issue-99265.rs:23:46
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|
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LL | println!("Hello {:1$.2$}!", f = 0.02f32, width = 5, precision = 2);
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| -- ^^^^^ this named argument is only referred to by position in formatting string
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| -- ^^^^^ this named argument is referred to by position in formatting string
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| |
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| this formatting argument uses named argument `width$` by position
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| this formatting argument uses named argument `width` by position
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|
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help: use the named argument by name to avoid ambiguity
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|
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@ -94,9 +94,9 @@ warning: named argument `precision` is not used by name
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--> $DIR/issue-99265.rs:23:57
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|
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LL | println!("Hello {:1$.2$}!", f = 0.02f32, width = 5, precision = 2);
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| -- ^^^^^^^^^ this named argument is only referred to by position in formatting string
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| -- ^^^^^^^^^ this named argument is referred to by position in formatting string
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| |
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| this formatting argument uses named argument `precision$` by position
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| this formatting argument uses named argument `precision` by position
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|
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help: use the named argument by name to avoid ambiguity
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|
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@ -107,9 +107,9 @@ warning: named argument `f` is not used by name
|
||||
--> $DIR/issue-99265.rs:23:33
|
||||
|
|
||||
LL | println!("Hello {:1$.2$}!", f = 0.02f32, width = 5, precision = 2);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -120,9 +120,9 @@ warning: named argument `width` is not used by name
|
||||
--> $DIR/issue-99265.rs:31:47
|
||||
|
|
||||
LL | println!("Hello {0:1$.2$}!", f = 0.02f32, width = 5, precision = 2);
|
||||
| -- ^^^^^ this named argument is only referred to by position in formatting string
|
||||
| -- ^^^^^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `width$` by position
|
||||
| this formatting argument uses named argument `width` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -133,9 +133,9 @@ warning: named argument `precision` is not used by name
|
||||
--> $DIR/issue-99265.rs:31:58
|
||||
|
|
||||
LL | println!("Hello {0:1$.2$}!", f = 0.02f32, width = 5, precision = 2);
|
||||
| -- ^^^^^^^^^ this named argument is only referred to by position in formatting string
|
||||
| -- ^^^^^^^^^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `precision$` by position
|
||||
| this formatting argument uses named argument `precision` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -146,7 +146,7 @@ warning: named argument `f` is not used by name
|
||||
--> $DIR/issue-99265.rs:31:34
|
||||
|
|
||||
LL | println!("Hello {0:1$.2$}!", f = 0.02f32, width = 5, precision = 2);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| - ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
|
|
||||
@ -159,10 +159,10 @@ warning: named argument `width` is not used by name
|
||||
--> $DIR/issue-99265.rs:52:9
|
||||
|
|
||||
LL | "{}, Hello {1:2$.3$} {4:5$.6$}! {1}",
|
||||
| -- this formatting argument uses named argument `width$` by position
|
||||
| -- this formatting argument uses named argument `width` by position
|
||||
...
|
||||
LL | width = 5,
|
||||
| ^^^^^ this named argument is only referred to by position in formatting string
|
||||
| ^^^^^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -173,10 +173,10 @@ warning: named argument `precision` is not used by name
|
||||
--> $DIR/issue-99265.rs:54:9
|
||||
|
|
||||
LL | "{}, Hello {1:2$.3$} {4:5$.6$}! {1}",
|
||||
| -- this formatting argument uses named argument `precision$` by position
|
||||
| -- this formatting argument uses named argument `precision` by position
|
||||
...
|
||||
LL | precision = 2,
|
||||
| ^^^^^^^^^ this named argument is only referred to by position in formatting string
|
||||
| ^^^^^^^^^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -190,7 +190,7 @@ LL | "{}, Hello {1:2$.3$} {4:5$.6$}! {1}",
|
||||
| - this formatting argument uses named argument `f` by position
|
||||
...
|
||||
LL | f = 0.02f32,
|
||||
| ^ this named argument is only referred to by position in formatting string
|
||||
| ^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -201,10 +201,10 @@ warning: named argument `width2` is not used by name
|
||||
--> $DIR/issue-99265.rs:58:9
|
||||
|
|
||||
LL | "{}, Hello {1:2$.3$} {4:5$.6$}! {1}",
|
||||
| -- this formatting argument uses named argument `width2$` by position
|
||||
| -- this formatting argument uses named argument `width2` by position
|
||||
...
|
||||
LL | width2 = 5,
|
||||
| ^^^^^^ this named argument is only referred to by position in formatting string
|
||||
| ^^^^^^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -215,10 +215,10 @@ warning: named argument `precision2` is not used by name
|
||||
--> $DIR/issue-99265.rs:60:9
|
||||
|
|
||||
LL | "{}, Hello {1:2$.3$} {4:5$.6$}! {1}",
|
||||
| -- this formatting argument uses named argument `precision2$` by position
|
||||
| -- this formatting argument uses named argument `precision2` by position
|
||||
...
|
||||
LL | precision2 = 2
|
||||
| ^^^^^^^^^^ this named argument is only referred to by position in formatting string
|
||||
| ^^^^^^^^^^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -232,7 +232,7 @@ LL | "{}, Hello {1:2$.3$} {4:5$.6$}! {1}",
|
||||
| - this formatting argument uses named argument `g` by position
|
||||
...
|
||||
LL | g = 0.02f32,
|
||||
| ^ this named argument is only referred to by position in formatting string
|
||||
| ^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -246,7 +246,7 @@ LL | "{}, Hello {1:2$.3$} {4:5$.6$}! {1}",
|
||||
| - this formatting argument uses named argument `f` by position
|
||||
...
|
||||
LL | f = 0.02f32,
|
||||
| ^ this named argument is only referred to by position in formatting string
|
||||
| ^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -257,9 +257,9 @@ warning: named argument `f` is not used by name
|
||||
--> $DIR/issue-99265.rs:64:31
|
||||
|
|
||||
LL | println!("Hello {:0.1}!", f = 0.02f32);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -270,7 +270,7 @@ warning: named argument `f` is not used by name
|
||||
--> $DIR/issue-99265.rs:68:32
|
||||
|
|
||||
LL | println!("Hello {0:0.1}!", f = 0.02f32);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| - ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
|
|
||||
@ -283,9 +283,9 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:79:23
|
||||
|
|
||||
LL | println!("{:0$}", v = val);
|
||||
| -- ^ this named argument is only referred to by position in formatting string
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v$` by position
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -296,9 +296,9 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:79:23
|
||||
|
|
||||
LL | println!("{:0$}", v = val);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v` by position
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -309,9 +309,9 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:84:24
|
||||
|
|
||||
LL | println!("{0:0$}", v = val);
|
||||
| -- ^ this named argument is only referred to by position in formatting string
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v$` by position
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -322,7 +322,7 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:84:24
|
||||
|
|
||||
LL | println!("{0:0$}", v = val);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| - ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
@ -335,9 +335,9 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:89:26
|
||||
|
|
||||
LL | println!("{:0$.0$}", v = val);
|
||||
| -- ^ this named argument is only referred to by position in formatting string
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v$` by position
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -348,9 +348,9 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:89:26
|
||||
|
|
||||
LL | println!("{:0$.0$}", v = val);
|
||||
| -- ^ this named argument is only referred to by position in formatting string
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v$` by position
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -361,9 +361,9 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:89:26
|
||||
|
|
||||
LL | println!("{:0$.0$}", v = val);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v` by position
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -374,9 +374,9 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:96:27
|
||||
|
|
||||
LL | println!("{0:0$.0$}", v = val);
|
||||
| -- ^ this named argument is only referred to by position in formatting string
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v$` by position
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -387,9 +387,9 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:96:27
|
||||
|
|
||||
LL | println!("{0:0$.0$}", v = val);
|
||||
| -- ^ this named argument is only referred to by position in formatting string
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v$` by position
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -400,7 +400,7 @@ warning: named argument `v` is not used by name
|
||||
--> $DIR/issue-99265.rs:96:27
|
||||
|
|
||||
LL | println!("{0:0$.0$}", v = val);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| - ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `v` by position
|
||||
|
|
||||
@ -413,9 +413,9 @@ warning: named argument `a` is not used by name
|
||||
--> $DIR/issue-99265.rs:104:28
|
||||
|
|
||||
LL | println!("{} {a} {0}", a = 1);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `a` by position
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `a` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -426,7 +426,7 @@ warning: named argument `a` is not used by name
|
||||
--> $DIR/issue-99265.rs:104:28
|
||||
|
|
||||
LL | println!("{} {a} {0}", a = 1);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| - ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `a` by position
|
||||
|
|
||||
@ -439,10 +439,10 @@ warning: named argument `b` is not used by name
|
||||
--> $DIR/issue-99265.rs:115:23
|
||||
|
|
||||
LL | {:1$.2$}",
|
||||
| -- this formatting argument uses named argument `b$` by position
|
||||
| -- this formatting argument uses named argument `b` by position
|
||||
...
|
||||
LL | a = 1.0, b = 1, c = 2,
|
||||
| ^ this named argument is only referred to by position in formatting string
|
||||
| ^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -453,10 +453,10 @@ warning: named argument `c` is not used by name
|
||||
--> $DIR/issue-99265.rs:115:30
|
||||
|
|
||||
LL | {:1$.2$}",
|
||||
| -- this formatting argument uses named argument `c$` by position
|
||||
| -- this formatting argument uses named argument `c` by position
|
||||
...
|
||||
LL | a = 1.0, b = 1, c = 2,
|
||||
| ^ this named argument is only referred to by position in formatting string
|
||||
| ^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -467,10 +467,10 @@ warning: named argument `a` is not used by name
|
||||
--> $DIR/issue-99265.rs:115:14
|
||||
|
|
||||
LL | {:1$.2$}",
|
||||
| - this formatting argument uses named argument `a` by position
|
||||
| -- this formatting argument uses named argument `a` by position
|
||||
...
|
||||
LL | a = 1.0, b = 1, c = 2,
|
||||
| ^ this named argument is only referred to by position in formatting string
|
||||
| ^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -481,10 +481,10 @@ warning: named argument `b` is not used by name
|
||||
--> $DIR/issue-99265.rs:126:23
|
||||
|
|
||||
LL | {0:1$.2$}",
|
||||
| -- this formatting argument uses named argument `b$` by position
|
||||
| -- this formatting argument uses named argument `b` by position
|
||||
...
|
||||
LL | a = 1.0, b = 1, c = 2,
|
||||
| ^ this named argument is only referred to by position in formatting string
|
||||
| ^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -495,10 +495,10 @@ warning: named argument `c` is not used by name
|
||||
--> $DIR/issue-99265.rs:126:30
|
||||
|
|
||||
LL | {0:1$.2$}",
|
||||
| -- this formatting argument uses named argument `c$` by position
|
||||
| -- this formatting argument uses named argument `c` by position
|
||||
...
|
||||
LL | a = 1.0, b = 1, c = 2,
|
||||
| ^ this named argument is only referred to by position in formatting string
|
||||
| ^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -512,7 +512,7 @@ LL | {0:1$.2$}",
|
||||
| - this formatting argument uses named argument `a` by position
|
||||
...
|
||||
LL | a = 1.0, b = 1, c = 2,
|
||||
| ^ this named argument is only referred to by position in formatting string
|
||||
| ^ this named argument is referred to by position in formatting string
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -523,9 +523,9 @@ warning: named argument `width` is not used by name
|
||||
--> $DIR/issue-99265.rs:132:39
|
||||
|
|
||||
LL | println!("{{{:1$.2$}}}", x = 1.0, width = 3, precision = 2);
|
||||
| -- ^^^^^ this named argument is only referred to by position in formatting string
|
||||
| -- ^^^^^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `width$` by position
|
||||
| this formatting argument uses named argument `width` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -536,9 +536,9 @@ warning: named argument `precision` is not used by name
|
||||
--> $DIR/issue-99265.rs:132:50
|
||||
|
|
||||
LL | println!("{{{:1$.2$}}}", x = 1.0, width = 3, precision = 2);
|
||||
| -- ^^^^^^^^^ this named argument is only referred to by position in formatting string
|
||||
| -- ^^^^^^^^^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `precision$` by position
|
||||
| this formatting argument uses named argument `precision` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
@ -549,9 +549,9 @@ warning: named argument `x` is not used by name
|
||||
--> $DIR/issue-99265.rs:132:30
|
||||
|
|
||||
LL | println!("{{{:1$.2$}}}", x = 1.0, width = 3, precision = 2);
|
||||
| - ^ this named argument is only referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `x` by position
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `x` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
|
||||
24
src/test/ui/macros/issue-99907.fixed
Normal file
24
src/test/ui/macros/issue-99907.fixed
Normal file
@ -0,0 +1,24 @@
|
||||
// check-pass
|
||||
// run-rustfix
|
||||
|
||||
fn main() {
|
||||
println!("Hello {f:.1}!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
|
||||
println!("Hello {f:1.1}!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
|
||||
println!("Hello {f}!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
|
||||
println!("Hello {f}!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
|
||||
println!("Hello {f}!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
}
|
||||
24
src/test/ui/macros/issue-99907.rs
Normal file
24
src/test/ui/macros/issue-99907.rs
Normal file
@ -0,0 +1,24 @@
|
||||
// check-pass
|
||||
// run-rustfix
|
||||
|
||||
fn main() {
|
||||
println!("Hello {:.1}!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
|
||||
println!("Hello {:1.1}!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
|
||||
println!("Hello {}!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
|
||||
println!("Hello { }!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
|
||||
println!("Hello { }!", f = 0.02f32);
|
||||
//~^ WARNING named argument `f` is not used by name [named_arguments_used_positionally]
|
||||
//~| HELP use the named argument by name to avoid ambiguity
|
||||
}
|
||||
68
src/test/ui/macros/issue-99907.stderr
Normal file
68
src/test/ui/macros/issue-99907.stderr
Normal file
@ -0,0 +1,68 @@
|
||||
warning: named argument `f` is not used by name
|
||||
--> $DIR/issue-99907.rs:5:30
|
||||
|
|
||||
LL | println!("Hello {:.1}!", f = 0.02f32);
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
|
|
||||
= note: `#[warn(named_arguments_used_positionally)]` on by default
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
LL | println!("Hello {f:.1}!", f = 0.02f32);
|
||||
| +
|
||||
|
||||
warning: named argument `f` is not used by name
|
||||
--> $DIR/issue-99907.rs:9:31
|
||||
|
|
||||
LL | println!("Hello {:1.1}!", f = 0.02f32);
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
LL | println!("Hello {f:1.1}!", f = 0.02f32);
|
||||
| +
|
||||
|
||||
warning: named argument `f` is not used by name
|
||||
--> $DIR/issue-99907.rs:13:27
|
||||
|
|
||||
LL | println!("Hello {}!", f = 0.02f32);
|
||||
| -- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
LL | println!("Hello {f}!", f = 0.02f32);
|
||||
| +
|
||||
|
||||
warning: named argument `f` is not used by name
|
||||
--> $DIR/issue-99907.rs:17:28
|
||||
|
|
||||
LL | println!("Hello { }!", f = 0.02f32);
|
||||
| --- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
LL | println!("Hello {f}!", f = 0.02f32);
|
||||
| +
|
||||
|
||||
warning: named argument `f` is not used by name
|
||||
--> $DIR/issue-99907.rs:21:29
|
||||
|
|
||||
LL | println!("Hello { }!", f = 0.02f32);
|
||||
| ---- ^ this named argument is referred to by position in formatting string
|
||||
| |
|
||||
| this formatting argument uses named argument `f` by position
|
||||
|
|
||||
help: use the named argument by name to avoid ambiguity
|
||||
|
|
||||
LL | println!("Hello {f}!", f = 0.02f32);
|
||||
| +
|
||||
|
||||
warning: 5 warnings emitted
|
||||
|
||||
Loading…
Reference in New Issue
Block a user