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Use Resolver::visit_expansion only with monotonic expansions.

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This commit is contained in:
Jeffrey Seyfried
2016-09-19 07:27:20 +00:00
parent 272cf4e61d
commit 1ee64e44a9
4 changed files with 24 additions and 19 deletions
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6
src/libsyntax/ext/base.rs
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@@ -470,7 +470,7 @@ pub trait Resolver {
fn add_expansions_at_stmt(&mut self, id: ast::NodeId, macros: Vec<Mark>);
fn find_attr_invoc(&mut self, attrs: &mut Vec<Attribute>) -> Option<Attribute>;
fn resolve_invoc(&mut self, invoc: &Invocation) -> Option<Rc<SyntaxExtension>>;
fn resolve_invoc(&mut self, scope: Mark, invoc: &Invocation) -> Option<Rc<SyntaxExtension>>;
}
pub enum LoadedMacro {
@@ -491,7 +491,9 @@ impl Resolver for DummyResolver {
fn add_expansions_at_stmt(&mut self, _id: ast::NodeId, _macros: Vec<Mark>) {}
fn find_attr_invoc(&mut self, _attrs: &mut Vec<Attribute>) -> Option<Attribute> { None }
fn resolve_invoc(&mut self, _invoc: &Invocation) -> Option<Rc<SyntaxExtension>> { None }
fn resolve_invoc(&mut self, _scope: Mark, _invoc: &Invocation) -> Option<Rc<SyntaxExtension>> {
None
}
}
#[derive(Clone)]