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/edspindexfile.h b/apt-pkg/edsp/edspindexfile.h
index 4ac0f9d72..8fa8fdd60 100644
--- a/apt-pkg/edsp/edspindexfile.h
+++ b/apt-pkg/edsp/edspindexfile.h
@@ -29,7 +29,7 @@ public:
    virtual bool Exists() const APT_OVERRIDE;
    virtual bool HasPackages() const APT_OVERRIDE;
 
-   edspLikeIndex(std::string const &File);
+   explicit edspLikeIndex(std::string const &File);
    virtual ~edspLikeIndex();
 };
 
@@ -42,7 +42,7 @@ protected:
 public:
    virtual const Type *GetType() const APT_OVERRIDE APT_PURE;
 
-   edspIndex(std::string const &File);
+   explicit edspIndex(std::string const &File);
    virtual ~edspIndex();
 };
 
@@ -55,7 +55,7 @@ protected:
 public:
    virtual const Type *GetType() const APT_OVERRIDE APT_PURE;
 
-   eippIndex(std::string const &File);
+   explicit eippIndex(std::string const &File);
    virtual ~eippIndex();
 };