N++ “has” that. It’s built-in and called the “Function List” (View => Function List). Of course, you’ll need to do a little work to get it to “work”.
Discussion
Solution
Summary below:
In your functionList.xml in the N++ install directory, in the “<associationMap>” section at the top, add:
<association id="markdown" userDefinedLangName="Markdown"/>
<association id="markdown" ext=".md"/>
And then at the bottom, in the <parsers> section, add:
<!-- ==================================================== [ Markdown ] -->
<parser
displayName="Markdown"
id ="markdown"
commentExpr="(?x) # free-spacing (see `RegEx - Pattern Modifiers`)
(?ms: # Code block
^ # ...at start-of-line a
(?'BLOCK'\x7E{3}(?!\x7E)|\x60{3}(?!\x60)) # block-start indicator
\w*\h*$ #
.*? # ...whatever,
^\x20{0,3} # ...optional indentation for a
\k'BLOCK' # block-end indicator
\h*$ # with trailing white-space only
)
"
>
<function
mainExpr="(?x) # free-spacing (see `RegEx - Pattern Modifiers`)
(?m-s) # ^ and $ match at line-breaks, dot does not
^ # at start-of-line
(?'NOCODE_INDENT'
\x20{0,3}(?!\x20) # indent of 3 spaces max, otherwise it's code
)
(?: # ATX-style heading
(?'LEVEL'\x23{1,6}(?!\x23)) # nr. of hashes indicate level
\h* # whitespace? ( use '+' instead of '*' for at least one white-space)
\K # discard text matched so far
(?:
[^\r\n\x5C]
| \x5C. # backslash escape sequence
)+
(?: # closing sequence
\h+ # ...starts w/ at least one white-space
\x23+ # ...contains only hashes, amount arbitrary
)? # ...is optional
\h*$ # trailing white-space up till line-break
| # Setext-style heading
\K # discard text matched so far
[^\r\n]+ # whatever,
(?= # ...up till
\h*(?:\r?\n|\n?\r) # ...any trailing white-space and a line-break,
(?&NOCODE_INDENT) # ...indent for header indicator
(?:={3,}|-{3,}) # ...H1- or H2-header indicator resp.,
\h*$ # ...trailing white-space up till line-break
)
)
"
>
<functionName>
<nameExpr expr="(?x)
(?|
(?:\h+\x23+\h*$)
[^\r\n]+
(?=
\h+\x23
)
| .*
)
"
/>
</functionName>
</function>
</parser>
Cheers.
