functionList/haskell.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!-- ==========================================================================\
|
|   To learn how to make your own language parser, please check the following
|   link:
|       https://npp-user-manual.org/docs/function-list/
|
\=========================================================================== -->
<NotepadPlus>
	<functionList>
		<!--
		|   Based on:
		|       https://notepad-plus-plus.org/community/topic/12972/trouble-with-defining-a-function-list-entry/7
		|
		|   By convention, the style of comment is indicated by the file extension,
		|   with ".hs"  indicating a "usual"  Haskell file
		|   and  ".lhs" indicating a literate Haskell file.
		\-->
		<parser
			displayName="Haskell"
			id         ="haskell_function"
			commentExpr="(?x)                                               # free-spacing (see `RegEx - Pattern Modifiers`)
							(?s:                                            # Multi Line Comment (nesting allowed)
								\{-                                         # - start-of-comment indicator
								(?>                                         # - followed by zero or more characters...
									[^{-]                                   #   ...not part of the start indicator,
								|	\{(?!-)                                 #   ...not being a start-of-comment indicator,
								|	-(?!\})                                 #   ...not being an end-of-comment indicator and
								|	(?R)                                    #   ...balancing through recursion (nesting)
								)*
								-\}                                         # - end-of-comment indicator
							)
						|	(?m-s:-{2}.*?$)                                 # Single Line Comment
						"
		>
			<function
				mainExpr="(?x)                                              # free-spacing (see `RegEx - Pattern Modifiers`)
						(?m-s)                                              # ^ and $ match at line breaks, dot does not
						^                                                   # NO leading whitespace at start-of-line
						[A-Za-z][\w\x27]*                                   # valid character combination for identifiers
						\x20+::\x20
						.*?$                                                # whatever, until end-of-line
					"
			>
				<functionName>
					<nameExpr expr="[A-Za-z][\w\x27]*" />
				</functionName>
			</function>
		</parser>
	</functionList>
</NotepadPlus>