feat: add support for C++20 modules (#1278)

* add support for C++20 modules

* add support for C++20 modules

* add support for C++20 modules

* add C++20 module support

* add C++20 module support

* fixed? param comment

* hope to have fixed the lines error

* hopefully actually fixed the lines error

* this should fix everything

* if this doesn't fix it i don't know what will

languages.json

@@ -37,7 +37,7 @@
       "name": "APL",
       "line_comment": ["⍝"],
       "extensions": ["apl", "aplf", "apls"],
-      "quotes": [["'", "'"]],
+      "quotes": [["'", "'"]]
     },
     "Arduino": {
       "name": "Arduino C++",
@@ -194,7 +194,7 @@
       "name": "BQN",
       "line_comment": ["#"],
       "extensions": ["bqn"],
-      "quotes": [["\\\"", "\\\""], ["'", "'"]],
+      "quotes": [["\\\"", "\\\""], ["'", "'"]]
     },
     "BrightScript": {
       "quotes": [["\\\"", "\\\""]],
@@ -340,6 +340,14 @@
       "quotes": [["\\\"", "\\\""]],
       "extensions": ["hh", "hpp", "hxx", "inl", "ipp"]
     },
+    "CppModule": {
+      "name": "C++ Module",
+      "line_comment": ["//"],
+      "multi_line_comments": [["/*", "*/"]],
+      "quotes": [["\\\"", "\\\""]],
+      "verbatim_quotes": [["R\\\"(", ")\\\""]],
+      "extensions": ["cppm", "ixx", "ccm", "mpp", "mxx", "cxxm", "hppm", "hxxm"]
+    },
     "Crystal": {
       "line_comment": ["#"],
       "shebangs": ["#!/usr/bin/crystal"],

tests/data/cppm.cppm

@@ -0,0 +1,46 @@
+/* 46 lines 37 code 3 comments 6 blanks */
+
+#include <stdio.h>
+
+// bubble_sort_function
+void bubble_sort(int a[10], int n) {
+  int t;
+  int j = n;
+  int s = 1;
+  while (s > 0) {
+    s = 0;
+    int i = 1;
+    while (i < j) {
+      if (a[i] < a[i - 1]) {
+        t = a[i];
+        a[i] = a[i - 1];
+        a[i - 1] = t;
+        s = 1;
+      }
+      i++;
+    }
+    j--;
+  }
+}
+
+int main() {
+  int a[] = {4, 65, 2, -31, 0, 99, 2, 83, 782, 1};
+  int n = 10;
+  int i = 0;
+
+  printf(R"(Before sorting:\n\n" )");
+  // Single line comment
+  while (i < n) {
+    printf("%d ", a[i]);
+    i++;
+  }
+
+  bubble_sort(a, n);
+
+  printf("\n\nAfter sorting:\n\n");
+  i = 0;
+  while (i < n) {
+    printf("%d ", a[i]);
+    i++;
+  }
+}