https://bugs.llvm.org/show_bug.cgi?id=35957
Bug ID: 35957
Summary: When declaring variable with __auto_type, name should
not be in scope until after initializer
Product: clang
Version: 5.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: oliver.klei...@c-01a.de
CC: llvm-bugs@lists.llvm.org
Created attachment 19679
--> https://bugs.llvm.org/attachment.cgi?id=19679&action=edit
example program code
When declaring a variable with __auto_type and initializing it with a variable
in an outer scope, having the same name, clang fails with
"error: variable 'var' declared with deduced type '__auto_type' cannot appear
in its own initializer"
The GCC docs (https://gcc.gnu.org/onlinedocs/gcc/Typeof.html, at bottom) state
that "[..]the name of the variable is not in scope until after the
initializer."
Note that GCC behaviour is similar to a variable declaration with a standard
type-specifier. I attach a small example that demonstrates both cases.
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