Edit C:\Users\Admin\AppData\Roaming\Notepad++\functionList\c.xml

<?xml version="1.0" encoding="UTF-8" ?>

<NotepadPlus>
	<functionList>
		
		<parser
			displayName="C"
			id         ="c_function"
			commentExpr="(?x)                                               # Utilize inline comments (see `RegEx - Pattern Modifiers`)
							(?s:\x2F\x2A.*?\x2A\x2F)                        # Multi Line Comment
						|	(?m-s:\x2F{2}.*$)                               # Single Line Comment
						|	(?s:\x22(?:[^\x22\x5C]|\x5C.)*\x22)             # String Literal - Double Quoted
						|	(?s:\x27(?:[^\x27\x5C]|\x5C.)*\x27)             # String Literal - Single Quoted
						"
		>
			<function
				mainExpr="(?x)                                              # Utilize inline comments (see `RegEx - Pattern Modifiers`)
						(?:                                                 # Declaration specifiers
							\b
							(?:
								(?-i:auto|register|static|extern|typedef)   # Storage class specifier
							|	(?:                                         # Type specifier
									(?-i:void|char|short|int|long|float|double|(?:un)?signed)
								|	(?-i:struct|union|enum)
									\s+
									(?&amp;VALID_ID)                        # Struct, Union or Enum Specifier (simplified)
								|	(?&amp;VALID_ID)                        # Type-definition name
								)
							|	(?'TYPE_QUALIFIER'(?-i:const|volatile))
							)
							\b
							\s*
						)*
						(?'DECLARATOR'
							(?'POINTER'
								\*
								\s*
								(?:
									\b(?&amp;TYPE_QUALIFIER)\b
									\s*
								)*
								(?:(?&amp;POINTER))?                        # Boost::Regex 1.58-1.59 do not correctly handle quantifiers on subroutine calls
							)?
							(?:                                             # 'DIRECT_DECLARATOR'
								\s*
								(?'VALID_ID'                                # valid identifier, use as subroutine
									\b(?!(?-i:
										auto
									|	break
									|	c(?:ase|har|on(?:st|ntinue))
									|	d(?:efault|o(?:uble)?)
									|	e(?:lse|num|xtern)
									|	f(?:loat|or)
									|	goto
									|	i(?:f|n(?:t|line))
									|	long
									|	while
									|	re(?:gister|strict|turn)
									|	s(?:hort|i(?:gned|zeof)|t(?:atic|ruct)|witch)
									|	typedef
									|	un(?:ion|signed)
									|	vo(?:id|latile)
									|	_(?:
											A(?:lignas|lignof|tomic)
										|	Bool
										|	Complex
										|	Generic
										|	Imaginary
										|	Noreturn
										|	Static_assert
										|	Thread_local
										)
									)\b)                                    # keywords, not to be used as identifier
									[A-Za-z_\x7F-\xFF][\w\x7F-\xFF]*        # valid character combination for identifiers
								)
							|	\s*$
								(?&amp;DECLARATOR)
								$
							|	\s*(?&amp;VALID_ID)
								\s*\[
								[^[\];{]*?
								\]
							|	\s*(?&amp;VALID_ID)
								\s*$
								[^();{]*?
								$
							)
							\s*
						)
						(?=\{)                                              # start of function body
					"
			>
				<functionName>
					<nameExpr expr="(?x)                                    # Utilize inline comments (see `RegEx - Pattern Modifiers`)
							[A-Za-z_\x7F-\xFF][\w\x7F-\xFF]*
							\s*$                                           # start of parameters
							(?s:.*?)                                        # whatever, until...
							$                                              # end   of parameters
						" />
					

				</functionName>
			</function>
		</parser>
	</functionList>
</NotepadPlus>

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