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[CS] Allow getCalleeLocator to find key path component callees

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In order to do this we need it to take a ConstraintLocator argument so
we can tell which component we want the callee for. To make it clear
that we're looking for a callee at the anchor, also rename the member
to getAnchormostCalleeLocator.
This commit is contained in:
Hamish Knight
2019-08-30 16:19:57 +01:00
parent b8b93eb7f5
commit 67ee821123
5 changed files with 86 additions and 32 deletions
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26
lib/Sema/ConstraintSystem.h
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@@ -1579,9 +1579,10 @@ public:
/// that locator.
llvm::DenseMap<ConstraintLocator *, ArgumentInfo> ArgumentInfos;
/// Form a locator with given anchor which then could be used
/// to retrieve argument information cached in the constraint system.
ConstraintLocator *getArgumentInfoLocator(Expr *anchor);
/// Form a locator that can be used to retrieve argument information cached in
/// the constraint system for the callee described by the anchor of the
/// passed locator.
ConstraintLocator *getArgumentInfoLocator(ConstraintLocator *locator);
/// Retrieve the argument info that is associated with a member
/// reference at the given locator.
@@ -2008,10 +2009,21 @@ public:
return e != ExprWeights.end() ? e->second.second : nullptr;
}
/// Returns a locator describing the callee for a given expression. For
/// a function application, this is a locator describing the function expr.
/// For an unresolved dot/member, this is a locator to the member.
ConstraintLocator *getCalleeLocator(Expr *expr);
/// Returns a locator describing the callee for the anchor of a given locator.
///
/// - For an unresolved dot/member anchor, this will be a locator describing
/// the member.
///
/// - For a subscript anchor, this will be a locator describing the subscript
/// member.
///
/// - For a key path anchor with a property/subscript component path element,
/// this will be a locator describing the decl referenced by the component.
///
/// - For a function application anchor, this will be a locator describing the
/// 'direct callee' of the call. For example, for the expression \c x.foo?()
/// the returned locator will describe the member \c foo.
ConstraintLocator *getAnchormostCalleeLocator(ConstraintLocator *locator);
public: