fn main() {
	a := 4 // comment1
	 + 6 // comment2

	b := 5 + // comment3
	 6

	c := 4 + 6 // comment4

	var := 'a' // comment5
	 + 'b' // comment6
	 + 'c' // comment7

	// vfmt off
pattern := r'^('
	+ r'(\^|([<>]?=?))?'       // match: ^, >, <, =, >=, <=
	+ r'((\*)|([0-9]+))'       // match: *, 1
	+ r'((\.?\*)|(\.[0-9]+))?' // match: *, .*, .1
	+ r'((\.?\*)|(\.[0-9]+))?' // match: *, .*, .1
	+ r'(-[0-9a-zA-Z.]+)?)'    // match prerelease part e.g: -beta.1
	+ r'|(\*)$'                // match just '*'
	// vfmt on

	pattern_fmt := r'^(' + r'(\^|([<>]?=?))?' // match: ^, >, <, =, >=, <=
	 + r'((\*)|([0-9]+))' // match: *, 1
	 + r'((\.?\*)|(\.[0-9]+))?' // match: *, .*, .1
	 + r'((\.?\*)|(\.[0-9]+))?' // match: *, .*, .1
	 + r'(-[0-9a-zA-Z.]+)?)' // match prerelease part e.g: -beta.1
	 + r'|(\*)$' // match just '*'
}