Add 'explicit' to most single argument constructors

This prevents implicit conversions that we do not want, such
as having a FileFd* being converted to a debListParser.

Two cases are not yet handled because they require changes
in code using them:

1. The classes in hashes.h
2. The URI class - this one is used quite a lot

1 files changed, 3 insertions, 3 deletions

diff --git a/apt-pkg/edsp/edsplistparser.h b/apt-pkg/edsp/edsplistparser.h
index 59c759f9d..8f56f8abf 100644
--- a/apt-pkg/edsp/edsplistparser.h
+++ b/apt-pkg/edsp/edsplistparser.h
@@ -35,7 +35,7 @@ class APT_HIDDEN edspLikeListParser : public debListParser
    virtual APT::StringView Description_md5() APT_OVERRIDE;
    virtual unsigned short VersionHash() APT_OVERRIDE;
 
-   edspLikeListParser(FileFd *File);
+   explicit edspLikeListParser(FileFd *File);
    virtual ~edspLikeListParser();
 };
 
@@ -48,7 +48,7 @@ protected:
    virtual bool ParseStatus(pkgCache::PkgIterator &Pkg,pkgCache::VerIterator &Ver) APT_OVERRIDE;
 
 public:
-   edspListParser(FileFd *File);
+   explicit edspListParser(FileFd *File);
    virtual ~edspListParser();
 };
 
@@ -58,7 +58,7 @@ protected:
    virtual bool ParseStatus(pkgCache::PkgIterator &Pkg,pkgCache::VerIterator &Ver) APT_OVERRIDE;
 
 public:
-   eippListParser(FileFd *File);
+   explicit eippListParser(FileFd *File);
    virtual ~eippListParser();
 };
 #endif