[llvm-bugs] [Bug 45626] New: SpacesInAngles: true does not insert or preserve leading space before :: operator

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45626

            Bug ID: 45626
           Summary: SpacesInAngles: true does not insert or preserve
                    leading space before :: operator
           Product: clang
           Version: 10.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Formatter
          Assignee: unassignedclangbugs at nondot.org
          Reporter: aron.mueller at curtis.ch
                CC: djasper at google.com, klimek at google.com,
                    llvm-bugs at lists.llvm.org

"SpacesInAngles: true" does not insert or preserve the leading space character
when there is a '::' after the opening angle bracket '<'.

Assume a file 'bug.cpp' with these lines:
#include <cstdint>

void f()
{
  (void)static_cast<::std::uint32_t>(1);
  (void)static_cast< ::std::uint32_t >(1);
}

Running
clang-format -style="{SpacesInAngles: true}" bug.cpp

produces
#include <cstdint>

void f() {
  (void)static_cast<::std::uint32_t >(1);
  (void)static_cast<::std::uint32_t >(1);
}

The trailing space is inserted/preserved correctly before the '>' but there
never is a leading space after the '<'.

Produced with clang-format version 10.0.0 on Windows 10 Pro (10.0.18363 Build
18363).

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