[Lilypond-auto] Issue 4550 in lilypond: Avoid "using" directives in included files

[lilypond]

Status: Started
Owner: address@hidden
Labels: Type-Maintainability

New issue 4550 by address@hidden: Avoid "using" directives in  
included files
https://code.google.com/p/lilypond/issues/detail?id=4550

"using namespace std;" seems to be *everywhere* in Lilypond.  It appears in  
*.cc files before headers are included.  It appears in header files too.

"using" directives should not be used where they might affect more than the  
current file.

The patch for this issue will have to wait for a handful of issues that I  
found along the way to be fixed, but here is the summary:
  * eliminate "using namespace std;"
  * add "std::" to everything in *.hh files (and other included files)
  * add "using std::whatever;" in *.cc files for common types (e.g. string,  
vector)
  * add "std::" in *.cc files for functions (e.g. swap) and other less  
common things (e.g. less)


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