add invalid boolean validation field

Author: Emyrk

Diff for: provider/parameter.go

@@ -34,6 +34,7 @@ type Validation struct {
 	Max         int
 	MaxDisabled bool `mapstructure:"max_disabled"`
 
+	Invalid   bool
 	Monotonic string
 
 	Regex string
@@ -363,6 +364,11 @@ func parameterDataSource() *schema.Resource {
 							Description:   "A regex for the input parameter to match against.",
 							Optional:      true,
 						},
+						"invalid": {
+							Type:        schema.TypeBool,
+							Optional:    true,
+							Description: "If invalid is 'true', the error will be shown.",
+						},
 						"error": {
 							Type:        schema.TypeString,
 							Optional:    true,
@@ -452,6 +458,10 @@ func valueIsType(typ, value string) diag.Diagnostics {
 }
 
 func (v *Validation) Valid(typ, value string) error {
+	if v.Invalid {
+		return v.errorRendered(value)
+	}
+
 	if typ != "number" {
 		if !v.MinDisabled {
 			return fmt.Errorf("a min cannot be specified for a %s type", typ)