feat: get<> fallback to get<string> (close #8)

Author: SSARCandy

ini/INIReader.h

@@ -249,13 +249,13 @@ class INIReader
     // Return the list of sections found in ini file
     const std::set<std::string>& Sections() const;
 
-    template<typename T>
+    template<typename T = std::string>
     T Get(std::string section, std::string name) const;
 
     template<typename T>
     T Get(std::string section, std::string name, T&& default_v) const;
 
-    template<typename T>
+    template<typename T = std::string>
     std::vector<T> GetVector(std::string section, std::string name) const;
 
     template<typename T>
@@ -315,7 +315,7 @@ inline const std::set<std::string>& INIReader::Sections() const
     return _sections;
 }
 
-template<typename T>
+template<typename T = std::string>
 inline T INIReader::Get(std::string section, std::string name) const {
     std::string key = MakeKey(section, name);
     if (!_values.count(key)) {
@@ -351,8 +351,7 @@ inline T INIReader::Get(std::string section, std::string name, T&& default_v) co
     return Get<T>(section, name);    
 }
 
-
-template<typename T>
+template<typename T = std::string>
 inline std::vector<T> INIReader::GetVector(std::string section, std::string name) const {
     std::string key = MakeKey(section, name);
     if (!_values.count(key)) {
@@ -387,6 +386,10 @@ inline std::vector<T> INIReader::GetVector(std::string section, std::string name
 
 template<typename T>
 inline T INIReader::Converter(std::string s) const {
+    if constexpr (std::is_same<T, std::string>()) {
+        return s;
+    }
+
     T v{};
     std::istringstream _{s};
     _.exceptions(std::ios::failbit);

test/tests.cpp

@@ -9,13 +9,13 @@ using namespace inih;
 TEST(INIReader, get_single_value) {
     INIReader r{"./fixtures/config.ini"};
 
-    EXPECT_EQ(r.Get<std::string>("section1", "any"), std::string("1"));
+    EXPECT_EQ(r.Get<>("section1", "any"), std::string("1"));
     EXPECT_EQ(r.Get<float>("section1", "any"), float(1.0));
     EXPECT_EQ(r.Get<double>("section1", "any"), double(1.0));
     EXPECT_EQ(r.Get<long>("section1", "any"), long(1));
     EXPECT_EQ(r.Get<unsigned long>("section1", "any"), (unsigned long)(1));
 
-    EXPECT_EQ(r.Get<std::string>("section1", "any2"), std::string("true"));
+    EXPECT_EQ(r.Get("section1", "any2"), std::string("true"));
     EXPECT_EQ(r.Get<bool>("section1", "any2"), true);
 }
 
@@ -26,7 +26,7 @@ TEST(INIReader, get_vector) {
     const std::vector<std::string> ans2{"1", "2", "3"};
 
     const auto& vec1 = r.GetVector<int>("section2", "any_vec");
-    const auto& vec2 = r.GetVector<std::string>("section2", "any_vec");
+    const auto& vec2 = r.GetVector<>("section2", "any_vec");
 
     for (int i = 0; i < ans1.size(); ++i) {
         EXPECT_EQ(vec1[i], ans1[i]);