Function isConstructor

lint/constructor_purity.go:57–66

isConstructor reports whether fn is a plain top-level function named New or New (the next rune after "New" is upper-case) that returns at least one result.

(fn *ast.FuncDecl)

// New<Something> (the next rune after "New" is upper-case) that returns at
// least one result.
func isConstructor(fn *ast.FuncDecl) bool {
	if fn.Recv != nil || fn.Name == nil {
		return false
	}
	name := fn.Name.Name
	if !isConstructorName(name) {
		return false
	}
	return fn.Type.Results != nil && len(fn.Type.Results.List) > 0
}

func isConstructorName(name string) bool {
	return name == "New" || (len(name) > 3 && name[:3] == "New" && name[3] >= 'A' && name[3] <= 'Z')