http://llvm.org/bugs/show_bug.cgi?id=15819
Bug ID: 15819
Summary: Poor recovery for use of unknown identifier
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
<stdin>:1:29: error: unknown type name 'B'
struct A {}; void f() { A x(B); }
^
<stdin>:1:28: warning: parentheses were disambiguated as a function declaration
[-Wvexing-parse]
struct A {}; void f() { A x(B); }
^~~
<stdin>:1:29: note: add a pair of parentheses to declare a variable
struct A {}; void f() { A x(B); }
^
( )
Um. What. The first diagnostic is bad -- we should be expecting 'B' to be a
variable, not a type, here, because a function declaration at block scope is
very unlikely.
The second diagnostic is very bad. I'm not sure whether we kept the type or
dropped it, but either way, we shouldn't issue this diagnostic if we had a
parse error in the declaration. The note is also broken -- observe that it
suggests adding the close-paren after the existing close-paren, not before it
where it belongs.
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