各种语言的注释总结--from wiki

Comments can be classified by:

• style (inline/block)
• parse rules (ignored/interpolated/stored in memory)
• recursivity (nestable/non-nestable)
• uses (docstrings/throwaway comments/other)

Inline comments[edit]

Inline comments are generally those that use a newline character to indicate the end of a comment, and an arbitrary delimiter or sequence of tokensto indicate the beginning of a comment.

Examples:

Symbol	Languages
C	Fortran 77 and earlier; the 'C' must be in column 1 of a line to indicate a comment.
REM, ::, :	BASIC, COMMAND.COM, cmd.exe, batch files
NB.	J; from the (historically) common abbreviation Nota bene, the Latin for "note well".
⍝	APL; the mnemonic is the glyph (jot overstruck with shoe-down) resembles a desk lamp, and hence "illuminates" the foregoing.
#	Bourne shell and other UNIX shells, Cobra, Perl, Python, Ruby, Seed7, Windows PowerShell, PHP, R, Maple
%	TeX, Prolog, MATLAB,[9] Erlang, S-Lang, Visual Prolog
//	ActionScript, C (C99), C++, C#, D, Go, Java, JavaScript, Object Pascal (Delphi), Objective-C, PHP, Scala, SASS
'	Visual Basic, VBScript, RealBasic
!	Fortran, Basic Plus, Inform
;	AutoHotkey, AutoIt, Lisp, Common Lisp, Clojure, Rebol, Scheme, many assemblers
--	Euphoria, Haskell, SQL, Ada, AppleScript, Eiffel, Lua, VHDL, SGML
*	COBOL (if fixed-form and * in column 7), PAW, many assemblers, Fortran (if fixed-form and * in column 1)
||	Curl
"	Vimscript
\	Forth

Block comments[edit]

Block comments are generally those that use a delimiter to indicate the beginning of a comment, and another delimiter to indicate the end of a comment. In this context, whitespace and newline characters are not counted as delimiters.

Examples:

Symbol	Languages
¢ ~ ¢, # ~ #, co ~ co, comment ~comment	ALGOL 68
/* */	ActionScript, AutoHotkey, C, C++, C#, D, Go, Java, JavaScript, Objective-C, PHP, PL/I, Scala (can be nested), SASS, SQL, Visual Prolog, CSS
#cs #ce	AutoIt
/+ +/	D (can be nested)
/# #/	Cobra (can be nested)
<# #>	Powershell
=begin =cut	Perl
=begin =end	Ruby
#<tag></code> <code>#</tag>	S-Lang
{- -}	Haskell (can be nested)
(* *)	Object Pascal (Delphi), ML, Mathematica, Pascal, Seed7, Applescript, OCaml (can be nested), Standard ML (can be nested), Maple, Newspeak
{ }	Object Pascal (Delphi), Pascal
|# #|	Curl
%{ %}	MATLAB[9] (the symbols must be in a separate line)
#| |#	Lisp, Scheme, Racket (can be nested in all three).
--[[ ]]	Lua
" "	Smalltalk
(comment ...)	Clojure