1 files changed, 20 insertions, 0 deletions
diff --git a/refined/condition.go b/refined/condition.go
new file mode 100644
index 0000000..5b43554
--- /dev/null
+++ b/refined/condition.go
@@ -0,0 +1,20 @@
+/*******************************************************************************
+* Copyright 2025 Stefan Majewsky <majewsky@gmx.net>
+* SPDX-License-Identifier: Apache-2.0
+* Refer to the file "LICENSE" for details.
+*******************************************************************************/
+
+package refined
+
+import (
+	"fmt"
+	"regexp"
+)
+
+// Building block for writing MatchesValue() implementations.
+func RegexpMatch(rx *regexp.Regexp, value string) error {
+	if !rx.MatchString(value) {
+		return fmt.Errorf("provided value %q does not match expected pattern %q", value, rx.String())
+	}
+	return nil
+}