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Remove unused single_step flag

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This appears to have never been used ever since its introduction in 61c7569d4 --
the plugin discussed on the PR introducing that commit, 34811, never
materialized.

It's also simple to readd in the current scheme, but given that macro expansion
is already quite complicated, additional useless state seems good to remove
while we're not using it.
This commit is contained in:
Mark Rousskov 2020-04-12 22:01:15 -04:00
parent ba72b15666
commit a0d4c743ab
1 changed files with 1 additions and 5 deletions
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6
src/librustc_expand/expand.rs
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@ -507,9 +507,7 @@ impl<'a, 'b> MacroExpander<'a, 'b> {
expanded_fragments.push(Vec::new());
}
expanded_fragments[depth - 1].push((expn_id, expanded_fragment));
if !self.cx.ecfg.single_step {
invocations.extend(new_invocations.into_iter().rev());
}
invocations.extend(new_invocations.into_iter().rev());
}
self.cx.current_expansion = orig_expansion_data;
@ -1819,7 +1817,6 @@ pub struct ExpansionConfig<'feat> {
pub recursion_limit: usize,
pub trace_mac: bool,
pub should_test: bool, // If false, strip `#[test]` nodes
pub single_step: bool,
pub keep_macs: bool,
}
@ -1831,7 +1828,6 @@ impl<'feat> ExpansionConfig<'feat> {
recursion_limit: 1024,
trace_mac: false,
should_test: false,
single_step: false,
keep_macs: false,
}
}