Major updates:

- A lotta cleanup
- BEd command parser rewrite
- Vase class removed
- Proper IO system.
- A lot more.

include/internal/functions/functions.h

@@ -0,0 +1,85 @@
+#pragma once
+
+#include "definitions.h"
+#include "internal/buffer/buffer.h"
+#include "internal/trie/trie.h"
+#include "pch.h"
+
+namespace bed::internal::functions {
+struct Function {
+  struct GlobalArg {
+    char delim;
+    std::string str;
+  };
+  struct RegexArg {
+    std::string expression;
+    std::string replacement;
+    std::string options;
+  };
+  struct ShellArg {
+    std::string cmd;
+  };
+  struct RubyArg {
+    std::string cmd;
+  };
+  using Argument = std::variant<
+    std::monostate,
+    GlobalArg,
+    RegexArg,
+    ShellArg,
+    RubyArg,
+    std::string,
+    std::filesystem::path,
+    int64_t,
+    char,
+    buffer::Range,
+    buffer::Line>;
+
+  enum struct AddressKind {
+    None,
+    Line,
+    Range
+  } address_kind;
+
+  enum struct ArgumentKind {
+    None,
+    Regex,
+    Shell,
+    Ruby,
+    Any,
+    File,
+    Number,
+    Mark,
+    Range,
+    Line,
+    Global
+  } argument_kind;
+
+  enum struct InputMode {
+    None,
+    Text,
+    Interactive,
+    CommandList
+  } input_mode;
+
+  std::string desc;
+  std::string default_address;
+  bool accept_zero;
+
+  std::function<
+    std::tuple<vase::Shard *, syntax::Language *, void *>(
+      BEd &ctx, const buffer::Address &addr, const Argument &arg
+    )>
+    pre_text_mode;
+
+  std::function<
+    void(
+      BEd &ctx, const buffer::Address &addr,
+      vase::Shard *text, const Argument &arg,
+      std::vector<buffer::Line> *marked
+    )>
+    handle;
+
+  static void register_posix(BEd &ctx);
+};
+} // namespace bed::internal::functions

include/internal/functions/suffixes.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "definitions.h"
+#include "internal/buffer/buffer.h"
+#include "pch.h"
+
+namespace bed::internal::functions {
+struct Suffix {
+  std::string desc;
+  std::function<void(BEd &)> handle;
+
+  static void register_suffixes(BEd &ctx);
+};
+} // namespace bed::internal::functions