diff options
Diffstat (limited to 'theories/Strings/String.v')
| -rw-r--r-- | theories/Strings/String.v | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/theories/Strings/String.v b/theories/Strings/String.v index 451b65cb..2be6618a 100644 --- a/theories/Strings/String.v +++ b/theories/Strings/String.v @@ -1,10 +1,12 @@ (* -*- coding: utf-8 -*- *) (************************************************************************) -(* v * The Coq Proof Assistant / The Coq Development Team *) -(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *) +(* * The Coq Proof Assistant / The Coq Development Team *) +(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *) +(* <O___,, * (see CREDITS file for the list of authors) *) (* \VV/ **************************************************************) -(* // * This file is distributed under the terms of the *) -(* * GNU Lesser General Public License Version 2.1 *) +(* // * This file is distributed under the terms of the *) +(* * GNU Lesser General Public License Version 2.1 *) +(* * (see LICENSE file for the text of the license) *) (************************************************************************) (** Contributed by Laurent Théry (INRIA); @@ -163,6 +165,18 @@ intros n0 H; apply Rec; simpl; auto. apply Le.le_S_n; auto. Qed. +(** *** Concatenating lists of strings *) + +(** [concat sep sl] concatenates the list of strings [sl], inserting + the separator string [sep] between each. *) + +Fixpoint concat (sep : string) (ls : list string) := + match ls with + | nil => EmptyString + | cons x nil => x + | cons x xs => x ++ sep ++ concat sep xs + end. + (** *** Test functions *) (** Test if [s1] is a prefix of [s2] *) |