https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80684
Bug ID: 80684
Summary: poor error message and fix-it hint for a function with
an argument of undeclared type
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
G++ issues the following confusing error messages for a function declaration
involving the undeclared type string (where std::string from <string> was meant
but the header was not included). The suggested alternative only makes things
worse.
$ cat y.C && gcc -S -Wall -Wextra -Wpedantic y.C
void f (string);
y.C:1:15: error: variable or field ‘f’ declared void
void f (string);
^
y.C:1:9: error: ‘string’ was not declared in this scope
void f (string);
^~~~~~
y.C:1:9: note: suggested alternative: ‘struct’
void f (string);
^~~~~~
struct
In contrast, clang simply prints the much clearer:
y.C:1:9: error: unknown type name 'string'
