Add implicit cast operators to char & short and their unsigned variants

Fix #179 error: conversion from 'SQLite::Column' to 'unsigned char' is ambiguous

Author: SRombauts

CHANGELOG.md

@@ -116,14 +116,15 @@ Version 2.2.0 - Sept 19 2017
 - Fix warnings #134
 - Deprecated Statement::IsOk() to Statement::HasRow()
 
-Version 2.3.0
+Version 2.3.0 - March 3 2019
 - Update SQLite3 from 3.20.1 to latest 3.27.2 (2019-02-25) #183 #187
 - Add Statement binding for long int values #147
 - Allows long int for bind when used with name #148
 - More cmake instructions for linux #151
 - Add comparison with sqlite_orm #141
 - Fix Statement::bind truncates long integer to 32 bits on x86_64 Linux #155
 - Add a move constructor to Database #157
-- Added tests for all MSVC compilers available on AppVeyor #169
+- Added tests for all MSVC compilers available on AppVeyor (2013, 2015, 2017) #169
 - Update VariadicBind.h #172
 - Better CMake compatibility #170
+- Add implicit cast operator to char and short types

include/SQLiteCpp/Column.h

@@ -166,6 +166,27 @@ class Column
         return getBytes ();
     }
 
+    /// Inline cast operator to char
+    inline operator char() const
+    {
+        return static_cast<char>(getInt());
+    }
+    /// Inline cast operator to unsigned char
+    inline operator unsigned char() const
+    {
+        return static_cast<unsigned char>(getInt());
+    }
+    /// Inline cast operator to short
+    inline operator short() const
+    {
+        return static_cast<short>(getInt());
+    }
+    /// Inline cast operator to unsigned short
+    inline operator unsigned short() const
+    {
+        return static_cast<unsigned short>(getInt());
+    }
+
     /// Inline cast operator to int
     inline operator int() const
     {

tests/Column_test.cpp

@@ -57,12 +57,16 @@ TEST(Column, basis) {
 
     // validates every variant of cast operators, and conversions of types
     {
-        const sqlite3_int64 id1     = query.getColumn(0); // operator int64_t()
-        const int64_t       id2     = query.getColumn(0); // operator int64_t()
-        const long long     id3     = query.getColumn(0); // operator int64_t()
-        const long          id4     = query.getColumn(0); // operator int64_t() or long() depending on compiler/architecture
-        const unsigned int  uint1   = query.getColumn(0); // operator uint32_t()
-        const uint32_t      uint2   = query.getColumn(0); // operator uint32_t()
+        const sqlite3_int64 id1     = query.getColumn(0); // operator long long()
+        const int64_t       id2     = query.getColumn(0); // operator long long()
+        const long long     id3     = query.getColumn(0); // operator long long()
+        const long          id4     = query.getColumn(0); // operator long long() or long() depending on compiler/architecture
+        const char          id5     = query.getColumn(0); // operator char()
+        const short         id6     = query.getColumn(0); // operator short()
+        const unsigned int  uint1   = query.getColumn(0); // operator unsigned int()
+        const uint32_t      uint2   = query.getColumn(0); // operator unsigned int()
+        const unsigned char uint3   = query.getColumn(0); // operator unsigned char()
+        const unsigned short uint4  = query.getColumn(0); // operator unsigned short()
         const char*         ptxt    = query.getColumn(1); // operator const char*()
         const std::string   msg     = query.getColumn(1); // operator std::string() (or const char* with MSVC)
         const int           integer = query.getColumn(2); // operator int()
@@ -78,8 +82,12 @@ TEST(Column, basis) {
         EXPECT_EQ(1,            id2);
         EXPECT_EQ(1,            id3);
         EXPECT_EQ(1,            id4);
+        EXPECT_EQ(1,            id5);
+        EXPECT_EQ(1,            id6);
         EXPECT_EQ(1U,           uint1);
         EXPECT_EQ(1U,           uint2);
+        EXPECT_EQ(1U,           uint3);
+        EXPECT_EQ(1U,           uint4);
         EXPECT_STREQ("first",   ptxt);
         EXPECT_EQ("first",      msg);
         EXPECT_EQ(-123,         integer);