Add escaping of characters

src/tokens.cpp

@@ -5,7 +5,7 @@
 #include <vector>
 #include <iostream>
 #include <sstream>
-
+#include <optional>
 
 static bool iswhitespace(char& character) {
     return character == ' '
@@ -14,6 +14,12 @@ static bool iswhitespace(char& character) {
         || character == '\r';
 }
 
+static std::optional<char> get_escaped(std::string_view inspected) {
+    if (inspected == "n")
+        return '\n';
+    return {};
+}
+
 namespace token {
     std::string type_name(Type& type) {
         switch (type) {
@@ -152,9 +158,27 @@ namespace token {
                 std::string content{};
                 c = text[++i]; // Skip initial "
                 do {
+                    if (c == '\\') {
+                        std::string escaped_content{};
+                        if ((i + 1) >= text_length) break;
+                        auto potential = get_escaped(escaped_content + text[++i]);
+                        std::cout << "\"" << escaped_content << "\"" << std::endl;
+                        while (potential.has_value() && (i + 1) < text_length) {
+                            escaped_content += text[i];
+                            std::cout << "\"" << escaped_content << "\"" << std::endl;
+                            potential = get_escaped(escaped_content + text[++i]);
+                        }
+                        auto escaped = get_escaped(escaped_content);
+                        if (escaped.has_value())
+                            content += *escaped;
+
+                        c = text[i];
+                    }
+                    else {
                         content += c;
                         if ((i + 1) >= text_length) break;
                         c = text[++i];
+                    }
                 } while (c != '\"');
                 i++; // Skip second "
                 tokens.push_back(token::Token{ token::Type::LiteralStr, content, meta + (content.size() + 2) });

test.c

@@ -13,35 +13,35 @@ void change_first(char otus[5]) {
 
 struct Otus;
 
-void update(struct Otus potus) {
-    potus.field = 20;
-}
 struct Otus {
     int field;
 };
+void update(struct Otus potus) {
+    potus.field = 20;
+}
 
 void update_ptr(char* ptr) {
     *ptr = 50;
 }
 
 int main() {
-    char text[29] = "10th fibonacci number is %d!";
+    char text[30] = "10th fibonacci number is %d!\n";
     printf(text, fibonacci(10));
 
     char somelist[5] = { 1, 2, 3, 4, 5 };
 
     change_first(somelist);
 
-    printf(" first element: %d!", somelist[0]);
+    printf("first element: %d!\n", somelist[0]);
 
     struct Otus otus = { 5 };
     update(otus);
 
-    printf(" first field: %d!", otus.field);
+    printf("first field: %d!\n", otus.field);
 
     char hello = 10;
     update_ptr(&hello);
-    printf(" hello: %d!", hello);
+    printf("hello: %d!\n", hello);
 
     return 0;
 }