1 files changed, 51 insertions, 0 deletions
diff --git a/dev/LibCompiler/src/Frontend.cc b/dev/LibCompiler/src/Frontend.cc
new file mode 100644
index 0000000..69ff6fd
--- /dev/null
+++ b/dev/LibCompiler/src/Frontend.cc
@@ -0,0 +1,51 @@
+/* -------------------------------------------
+
+  Copyright (C) 2025 Amlal EL Mahrouss, all rights reserved
+
+------------------------------------------- */
+
+#include <LibCompiler/Frontend.h>
+
+namespace LibCompiler {
+/// find the perfect matching word in a haystack.
+/// \param haystack base string
+/// \param needle the string we search for.
+/// \return if we found it or not.
+bool find_word(std::string haystack, std::string needle) noexcept {
+  auto index = haystack.find(needle);
+
+  // check for needle validity.
+  if (index == std::string::npos) return false;
+
+  // declare lambda
+  auto not_part_of_word = [&](int index) {
+    if (std::isspace(haystack[index]) || std::ispunct(haystack[index])) return true;
+
+    if (index <= 0 || index >= haystack.size()) return true;
+
+    return false;
+  };
+
+  return not_part_of_word(index - 1) && not_part_of_word(index + needle.size());
+}
+
+/// find a word within strict conditions and returns a range of it.
+/// \param haystack
+/// \param needle
+/// \return position of needle.
+std::size_t find_word_range(std::string haystack, std::string needle) noexcept {
+  auto index = haystack.find(needle);
+
+  // check for needle validity.
+  if (index == std::string::npos) return false;
+
+  if (!isalnum((haystack[index + needle.size() + 1])) &&
+      !isdigit(haystack[index + needle.size() + 1]) &&
+      !isalnum((haystack[index - needle.size() - 1])) &&
+      !isdigit(haystack[index - needle.size() - 1])) {
+    return index;
+  }
+
+  return std::string::npos;
+}
+}  // namespace LibCompiler
+\ No newline at end of file