Add experimental string transpilation with interpolation

CMakeLists.txt

@@ -57,7 +57,7 @@ if (${CMAKE_CXX_COMPILER_ID} STREQUAL GNU)
     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MINIMAL_GNU})
         message(FATAL_ERROR "G++ ${MINIMAL_GNU} or higher is required.")
     endif()
-    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fsched-pressure -flive-range-shrinkage -fpredictive-commoning -ftree-partial-pre -fira-loop-pressure -ftree-loop-distribution -floop-interchange -fsplit-paths -fgcse-las -fgcse-sm -fipa-pta -fstdarg-opt -fivopts -s")
+    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -foptimize-strlen -fsched-pressure -flive-range-shrinkage -fpredictive-commoning -ftree-partial-pre -fira-loop-pressure -ftree-loop-distribution -floop-interchange -fsplit-paths -fgcse-las -fgcse-sm -fipa-pta -fstdarg-opt -fivopts -s")
     set(CMAKE_CXX_FLAGS "-fno-use-linker-plugin -fwhole-program ${CMAKE_CXX_FLAGS}")
 elseif(${CMAKE_CXX_COMPILER_ID} STREQUAL Clang)
     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MINIMAL_CLANG})

README.md

@@ -5,7 +5,7 @@
 <img align="left" src="/Username404-59/Yerbacon/raw/branch/stable/resources/Yerbacon.png" alt="Yerbacon logo" width="192" height="192">
 Aka Yer Bacon,
 
-- #### A language that transpiles into lua, javascript or python code.
+- #### A language that transpiles into lua, javascript (ES6) or python code.
 ```
 main #=> {
   println "Hello, World!"

src/headers/transpiler/Target.hpp

@@ -6,6 +6,7 @@
 #include <iostream>
 #include <memory>
 #include <sstream>
+#include <cstring>
 
 #include "../parsing/ParseComponents.hpp"
 
@@ -14,7 +15,49 @@ class Target {
 protected:
     std::stringstream output;
     INCLUDECOMPONENT(StandardComponents::Define);
-    INCLUDECOMPONENT(StandardComponents::types::String)
+    INCLUDECOMPONENT(StandardComponents::types::String);
+    void stringInterpolation(string view, const char* openMultiline = "", const char* closeMultiline = "", const char* concatenationCharacters = "+") {
+        vector<size_t> interpolationVector;
+        const string interpolationString = "${";
+        unsigned long occurence_position = view.find(interpolationString);
+        while (occurence_position != string::npos) {
+            interpolationVector.push_back(occurence_position);
+            occurence_position = view.find(interpolationString, occurence_position + interpolationString.size());
+        }
+        const bool noMultiline = not (strcmp(openMultiline, "") != 0 && strcmp(closeMultiline, openMultiline) != 0);
+        const bool multiline = view.find('\n') != string::npos && not noMultiline;
+        if (noMultiline) {
+            unsigned long newLine = view.find('\n');
+            while (newLine != string::npos) {
+                view.erase(newLine, 1);
+                view.insert(newLine, "\\n");
+                newLine = view.find('\n', newLine);
+            }
+        }
+        const char* const openCharacters = multiline ? openMultiline : "\"";
+        decltype(openCharacters) closeCharacters = multiline ? closeMultiline : openCharacters;
+        if (not interpolationVector.empty()) {
+            unsigned long closingBrace = 0;
+            for (unsigned long i = 0; i < interpolationVector.size(); ++i) {
+                const auto& occurence = interpolationVector[i];
+                const bool hasNext = (i + 1) < interpolationVector.size();
+                const bool oldClosingBraceIsFar = closingBrace >= occurence;
+                if (i > 0) output << concatenationCharacters;
+                output << openCharacters << view.substr(closingBrace + (i > 0), (occurence - closingBrace) - (i > 0));
+                closingBrace = view.find_first_of('}', occurence);
+                const bool closingBraceIsNPOS = closingBrace == string::npos;
+                const bool wrongClosingBrace = !closingBraceIsNPOS && ((hasNext && closingBrace > interpolationVector[i + 1]));
+                if (closingBraceIsNPOS || wrongClosingBrace) {
+                    output << view.substr(occurence - 1, (hasNext ? interpolationVector[i + 1] - (occurence - 1) : 0));
+                }
+                output << closeCharacters;
+                if (not closingBraceIsNPOS && not wrongClosingBrace) {
+                    output << concatenationCharacters;
+                    output << view.substr(occurence + interpolationString.size(), (closingBrace - occurence) - interpolationString.size());
+                }
+            }
+        } else output << openCharacters << view << closeCharacters << '\n';
+    }
     INCLUDECOMPONENT(StandardComponents::Reference);
     INCLUDECOMPONENT(StandardComponents::Class);
 public:

src/headers/transpiler/implementations/Js.hpp

@@ -5,6 +5,9 @@ struct JsTarget: Target {
     void on(const StandardComponents::Define &parseComponent) override {
         output << (parseComponent.final ? "const " : "let ") << parseComponent.name << " = ";
     }
+    void on(const StandardComponents::types::String &parseComponent) override {
+        stringInterpolation(parseComponent.content);
+    }
 };
 
 #endif

src/headers/transpiler/implementations/Lua.hpp

@@ -9,30 +9,7 @@ struct LuaTarget: Target {
         output << " = ";
     }
     void on(const StandardComponents::types::String &parseComponent) override {
-        const string_view view (parseComponent.content);
-        vector<size_t> interpolationVector;
-        const string interpolationString = "${";
-        unsigned long occurence_position = view.find(interpolationString);
-        while (occurence_position != string_view::npos) {
-            interpolationVector.push_back(occurence_position);
-            occurence_position = view.find(interpolationString, occurence_position + interpolationString.size());
-        }
-        const bool multiline = view.find('\n') != string_view::npos;
-        const char* openCharacters = multiline ? "[[" : "\"";
-        decltype(openCharacters) closeCharacters = multiline ? "]]" : "\"";
-        if (not interpolationVector.empty()) {
-            unsigned long closingBrace = 0;
-            for (unsigned long i = 0; cmp_less(i, interpolationVector.size()); ++i) {
-                const auto& occurence = interpolationVector[i];
-                if (i > 0) output << "..";
-                output << openCharacters << view.substr((i > 0) ? closingBrace + 1 : 0, occurence - (closingBrace + 1)) << closeCharacters;
-                closingBrace = view.find_first_of('}', occurence);
-                if (closingBrace == string_view::npos) {
-                    throw Yerbacon::Exception("Closing brace missing in a string");
-                }
-                output << ".." << view.substr(occurence + interpolationString.size(), (closingBrace - occurence) - interpolationString.size());
-            }
-        } else output << openCharacters << view << closeCharacters << '\n';
+        stringInterpolation(parseComponent.content, "[[", "]]", "..");
     }
 };
 

src/headers/transpiler/implementations/Py.hpp

@@ -5,6 +5,9 @@ struct PyTarget: Target {
     void on(const StandardComponents::Define &parseComponent) override {
         output << parseComponent.name << " = ";
     }
+    void on(const StandardComponents::types::String &parseComponent) override {
+        stringInterpolation(parseComponent.content, "\"\"\"", "\"\"\"");
+    }
 };
 
 #endif