patch 9.0.0623: error for modifying a const is not detected at compile time Commit: https://github.com/vim/vim/commit/fa1039760e8c1a0c7a2a722160bd3d71a4736e61 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Sep 29 19:14:42 2022 +0100 patch 9.0.0623: error for modifying a const is not detected at compile time Problem: Error for modifying a const is not detected at compile time. Solution: Add TTFLAG_CONST and check for it in add() and extend().

/* textformat.c */
int has_format_option(int x);
void internal_format(int textwidth, int second_indent, int flags, int format_only, int c);
void auto_format(int trailblank, int prev_line);
void check_auto_format(int end_insert);
int comp_textwidth(int ff);
void op_format(oparg_T *oap, int keep_cursor);
void op_formatexpr(oparg_T *oap);
int fex_format(linenr_T lnum, long count, int c);
void format_lines(linenr_T line_count, int avoid_fex);
/* vim: set ft=c : */