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Remove the `T::VISIT_TOKENS` test in `visit_mac_args`.
The two paths are equivalent -- they both end up calling `visit_expr()`. I have kept the more restrictive path, the one that requires that `token` be an expression nonterminal. (The next commit will simplify this function further.)
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@ -372,9 +372,6 @@ pub fn visit_mac_args<T: MutVisitor>(args: &mut MacArgs, vis: &mut T) {
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}
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MacArgs::Eq(eq_span, token) => {
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vis.visit_span(eq_span);
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if T::VISIT_TOKENS {
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visit_token(token, vis);
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} else {
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// The value in `#[key = VALUE]` must be visited as an expression for backward
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// compatibility, so that macros can be expanded in that position.
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match &mut token.kind {
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@ -386,7 +383,6 @@ pub fn visit_mac_args<T: MutVisitor>(args: &mut MacArgs, vis: &mut T) {
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}
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}
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}
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}
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}
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pub fn visit_delim_span<T: MutVisitor>(dspan: &mut DelimSpan, vis: &mut T) {
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