Add string_methods

Author: RobLoach

CMakeLists.txt

@@ -179,7 +179,7 @@ set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${LINKER_FLAGS}")
 
 
 
-set(CHAISCRIPT_BRANCH develop)
+set(CHAISCRIPT_BRANCH v6.1.0)
 
 file(DOWNLOAD https://github.com/ChaiScript/ChaiScript/archive/${CHAISCRIPT_BRANCH}.tar.gz "${CMAKE_BINARY_DIR}/chaiscript/chaiscript-${CHAISCRIPT_BRANCH}.tar.gz"
   INACTIVITY_TIMEOUT 180 TIMEOUT 180 TLS_VERIFY off)
@@ -230,4 +230,6 @@ add_executable(string_id_test tests/string_id.cpp)
 target_link_libraries(string_id_test ${LIBS})
 ADD_CATCH_TESTS(string_id_test)
 
-
+add_executable(string_methods_test tests/string_methods.cpp)
+target_link_libraries(string_methods_test ${LIBS})
+ADD_CATCH_TESTS(string_methods_test)

include/chaiscript/extras/string_methods.hpp

@@ -0,0 +1,63 @@
+#include <string>
+#include <vector>
+
+#include <chaiscript/chaiscript.hpp>
+
+namespace chaiscript {
+  namespace extras {
+    namespace string_methods {
+      ModulePtr bootstrap(ModulePtr m = std::make_shared<Module>())
+      {
+  		// string::replace(std::string search, std::string replace)
+		chai.add(fun([](const std::string& subject, const std::string& search, const std::string& replace) {
+			std::string result(subject);
+			size_t pos = 0;
+			while ((pos = result.find(search, pos)) != std::string::npos) {
+				result.replace(pos, search.length(), replace);
+				pos += replace.length();
+			}
+			return result;
+		}), "replace");
+
+      	// string::replace(char, char)
+  		m->add(fun([](const std::string& subject, char search, char replace) {
+			std::string result(subject);
+			std::replace(result.begin(), result.end(), search, replace);
+			return result;
+		}), "replace");
+
+
+		// string::trim()
+		m->add(fun([](const std::string& subject) {
+			std::string result(subject);
+			std::string chars = "\t\n\v\f\r ";
+			result.erase(0, result.find_first_not_of(chars));
+			result.erase(0, result.find_last_not_of(chars));
+			return result;
+		}), "trim");
+
+		// string::split()
+		m->add(fun([](const std::string& subject, const std::string& token) {
+			std::string str(subject);
+			std::vector<std::string> result;
+			while (str.size()) {
+				int index = str.find(token);
+				if (index != std::string::npos) {
+					result.push_back(str.substr(0, index));
+					str = str.substr(index + token.size());
+					if (str.size() == 0) {
+						result.push_back(str);
+					}
+				} else {
+					result.push_back(str);
+					str = "";
+				}
+			}
+			return result;
+		}), "split");
+
+        return m;
+      }
+    }
+  }
+}

tests/string_methods.cpp

@@ -0,0 +1,18 @@
+#define CATCH_CONFIG_MAIN  // This tells Catch to provide a main() - only do this in one cpp file
+#include <string>
+#include "catch.hpp"
+
+#include <chaiscript/chaiscript.hpp>
+#include <chaiscript/chaiscript_stdlib.hpp>
+#include "../include/chaiscript/extras/string_methods.hpp"
+
+#include <iostream>
+
+TEST_CASE( "Math functions work", "[math]" ) {
+  auto stringmethods = chaiscript::extras::string_methods::bootstrap();
+
+  chaiscript::ChaiScript chai;
+  chai.add(stringmethods);
+
+  CHECK(chai.eval<std::string>("\"   Hello World!    \".trim()") == "Hello World!");
+}