Support octal, hex, and arbitrary radix numbers

compiler+runtime/bin/compile

@@ -2,4 +2,6 @@
 
 set -euo pipefail
 
+git_root=$(git rev-parse --show-toplevel)
+"$git_root"/compiler+runtime/bin/format
 cmake --build build "$@"

compiler+runtime/bin/format

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+git_root=$(git rev-parse --show-toplevel)
+
+for i in $(git status | grep -E "modified:.*[hc]pp" | sed 's/modified:\s*//'); do
+  "$git_root"/compiler+runtime/build/llvm-install/usr/local/bin/clang-format -i "$i"
+  echo "formatted" "$i"
+done

compiler+runtime/include/cpp/jank/read/lex.hpp

@@ -150,14 +150,19 @@ namespace jank::read::lex
     processor(native_persistent_string_view const &f);
 
     result<token, error> next();
-    option<char> peek() const;
+    option<char> peek(native_integer const ahead = 1) const;
     option<error> check_whitespace(native_bool const found_space);
+    native_bool is_valid_num_char(char const c) const;
 
     iterator begin();
     iterator end();
 
     size_t pos{};
-    /* Whether or not the previous token requires a space after it. */
+    native_integer radix{ 10 };
+    /* The 'r' used in arbitrary radix (prefixed with N and then r, where N is the radix (2 <= radix <= 36); */
+    /* e.g. 2r10101 for binary, 16rebed00d for hex) */
+    native_bool found_r{};
+    /* Whether the previous token requires a space after it. */
     native_bool require_space{};
     /* True when seeing a '/' following a number. */
     native_bool found_slash_after_number{};