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earmark

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Earmark is a pure-Elixir Markdown converter. It is intended to be used as a library (just call Earmark.as_html), but can also be used as a command-line tool (run mix escript.build first). Output generation is pluggable.

Retired package: Deprecated - Earmark is no longer maintained. Migrate to a replacement, for example MDEx (https://hex.pm/packages/mdex).
Security advisory: This version has known vulnerabilities. View advisories
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earmark src link_text_parser.yrl
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src/link_text_parser.yrl 

Nonterminals link_or_image

             link rest

             inside_brackets inside_brackets_part anything.



Terminals any_quote open_bracket open_title close_bracket open_paren close_paren verbatim escaped exclamation_mark ws.



Rootsymbol link_or_image.



link_or_image -> exclamation_mark link : make_image_tuple('$2').

link_or_image -> link : '$1'.



link -> open_bracket close_bracket                      : {link, "", "[]"}.

link -> open_bracket close_bracket rest                 : {link, "", "[]"}.

link -> open_bracket inside_brackets close_bracket      : title_tuple('$2').

link -> open_bracket inside_brackets close_bracket rest : title_tuple('$2').



inside_brackets -> inside_brackets_part                       : '$1'.

inside_brackets -> inside_brackets_part inside_brackets       : concat_tuple('$1', '$2').



inside_brackets_part -> exclamation_mark                           : extract_token('$1').

inside_brackets_part -> verbatim                                   : extract_token('$1').

inside_brackets_part -> ws                                         : extract_token('$1').

inside_brackets_part -> open_title                                 : extract_token('$1').

inside_brackets_part -> open_paren                                 : {"(", "("}.

inside_brackets_part -> close_paren                                : {")", ")"}.

inside_brackets_part -> any_quote                                  : extract_token('$1').

inside_brackets_part -> escaped                                    : escaped_token('$1').

inside_brackets_part -> open_bracket close_bracket                 : {"[]", "[]"}.

inside_brackets_part -> open_bracket inside_brackets close_bracket : concat_3t("[", '$2', "]").



rest     -> anything.

rest     -> anything rest.



anything -> exclamation_mark.

anything -> ws.

anything -> verbatim.

anything -> open_paren.

anything -> close_paren.

anything -> open_bracket.

anything -> close_bracket.

anything -> any_quote.

anything -> escaped.

anything -> open_title.



Erlang code.



concat_tuple({LT, LP}, {RT, RP}) -> {string:concat(LT, RT), string:concat(LP, RP)}.



concat_3t(L, {MT, MP}, R) -> {string:join([L, MT, R], ""), string:join([ L, MP, R ], "")}.



escaped_token({_Token, _Line, Value}) -> {string:concat("\\", Value), string:concat("\\", Value)}.



extract_token({_Token, _Line, Value}) -> {Value, Value}.



make_image_tuple({_Link, L, R}) -> {image, L, string:concat("!", R)}.



title_tuple({Title, Parsed}) -> {link, Title, string:join(["[", Parsed, "]"], "")}.



%% SPDX-License-Identifier: Apache-2.0