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(back_comment): Don't allow quoting a comment-end.
(scan_lists): Likewise.

for either kind of buffer.  Scan string by bytes and chars.

(find_defun_start): Additional arg POS_BYTE.
Save final byte pos in find_start_value_byte.
(find_start_value_byte): New variable.

(Fforward_comment): Scan by bytes and chars.
(Fbackward_prefix_chars): Scan by bytes and chars.
(scan_words, scan_sexps_forward): Scan bytes as well as chars.
(skip_chars, scan_lists): Scan by bytes and chars.  Now static.

(char_quoted): Take charpos and bytepos as args.
(back_comment): Likewise.
(update_syntax_table): Arg renamed.
(inc_bytepos, dec_bytepos): New functions.

whenever not inside a string or a comment.

when reaching the first of the pair.

(Fmodify_syntax_entry): Use XINT to access c.
(describe_syntax): Use XINT to access first.

New arg COMSTYLE; callers changed.

text property into account when doing SYNTAX (c).
(ST_COMMENT_STYLE, ST_STRING_STYLE): New codes to denote
delimiters for new types of strings and comments.
(Vparse_sexp_lookup_properties): New variable.
(struct lisp_parse_state): Comment updated.
(gl_state): New global variable.
(update_syntax_table): New function.
(char_quoted): Move earlier, update gl_state when needed.
(find_defun_start): Update gl_state when needed.
(back_comment): New function.
(Scomment_fence, Sstring_fence): New delimeter char classes
denoted by `!' and `|'.
(Fchar_syntax, Fmatching_paren): Update gl_state to whole-bufferstate.
(scan_words): update gl_state when needed.
(Fskip_chars_forward): Move from search.c.
(Fskip_chars_backward): Move from search.c.
(Fskip_syntax_forward): Move from search.c.
(Fskip_syntax_backward): Move from search.c.
(skip_chars): Move from search.c.
(Fforward_comment, scan_lists): Update gl_state when needed.
Handle Scomment_fence, Sstring_fence.
(Fbackward_prefix_chars) Update gl_state when needed.
(scan_sexps_forward): Update gl_state when needed.
Handle Scomment_fence, Sstring_fence.  If comment_stop==-1, stop at start
or end of comment or string.
(Fparse-partial-sexp): Doc fix.
(syms_of_syntax): Move initialization of skip* from search.c.

of "comparison is always 1 ...".

VALUE is char-table.

(Vsyntax_code_object): New variable.
(Fmodify_syntax_entry): Handle multibyte characters.  A multibyte
character in matching parenthesis is also handled correctly.  Use
shared object in the vector Vsyntax_code_object for an ASCII
character.
(describe_syntax): Handle a multibyte character in matching
parenthesis.
(describe_syntax_1): Describe also parent syntax tables.
(scan_words, Fforward_comment): Handle multibyte characters.
(scan_lists, char_quoted, Fbackward_prefix_chars): Likewise.
(scan_sexps_forward): Likewise.
(init_syntax_once): Initialize Vsyntax_code_object.
Initialize Vstandard_syntax_table by share objects in
Vsyntax_code_object.
(syms_of_syntax): Staticpro Vsyntax_code_object.

(syms_of_syntax): Set up Qscan_error.

Set the parent only if it was nil.

Harmonize arguments with documentation.

Use Qsyntax_table_p for the error message.

(Fmodify_syntax_entry): Don't fail to init MATCH.

(init_syntax_once): Call Fmake_char_table the new way.
Set up Qsyntax_table.
(Fsyntax_table_p): Check the `purpose' field.

(Fmodify_syntax_entry, init_syntax_once): Use SET_RAW_SYNTAX_ENTRY.
Handle new syntax-table data format.
(check_syntax_table): Use CHECK_CHAR_TABLE.  Now static.
Don't return anything; callers changed.
(Fcopy_syntax_table): Use Fcopy_sequence.
(Fchar_syntax, Fmatching_paren, Fforward_comment): Copy complex args
to SYNTAX into variables before using them.
(Fsyntax_table_p): Accept any char-table.
(syntax_parent_lookup): New function.
(syntax_temp): New variable.

in the starting state for tracking when we reach TARGETDEPTH.

do notice a 2-char comment ender that straddles FROM.