add a couple of tests

Author: Enchufa2

ChangeLog

@@ -2,6 +2,8 @@
 
 	* inst/include/Rcpp/internal/r_vector.h: Return null start for empty vectors
 	instead of an invalid pointer, which causes UB in e.g. std::copy
+	* inst/tinytest/test_vector.R: Add tests for std::copy
+	* inst/tinytest/cpp/Vector.cpp: Idem
 
 2026-03-26  Dirk Eddelbuettel  <edd@debian.org>
 

inst/tinytest/cpp/Vector.cpp

@@ -2,7 +2,8 @@
 //
 // Vector.cpp: Rcpp R/C++ interface class library -- Vector unit tests
 //
-// Copyright (C) 2012 - 2018    Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2012 - 2025    Dirk Eddelbuettel and Romain François
+// Copyright (C) 2026           Dirk Eddelbuettel, Romain François and Iñaki Ucar
 //
 // This file is part of Rcpp.
 //
@@ -896,3 +897,10 @@ double NumericVector_test_out_of_bounds_read(NumericVector v, R_xlen_t i) {
 SEXP CharacterVector_test_out_of_bounds_read(CharacterVector v, R_xlen_t i) {
     return v[i];
 }
+
+// [[Rcpp::export]]
+NumericVector vec_copy(NumericVector vec1) {
+    NumericVector vec2(vec1.size());
+    std::copy(vec1.begin(), vec1.end(), vec2.begin());
+    return vec2;
+}

inst/tinytest/test_vector.R

@@ -1,5 +1,6 @@
 
-##  Copyright (C) 2010 - 2019  Dirk Eddelbuettel and Romain Francois
+##  Copyright (C) 2010 - 2025  Dirk Eddelbuettel and Romain François
+##  Copyright (C) 2026         Dirk Eddelbuettel, Romain François and Iñaki Ucar
 ##
 ##  This file is part of Rcpp.
 ##
@@ -702,3 +703,8 @@ expect_true( !CharacterVector_test_equality_crosspolicy("foo", "bar") )
 #expect_warning(CharacterVector_test_out_of_bounds_read(character(0), 0))
 #expect_warning(CharacterVector_test_out_of_bounds_read(character(1), 1))
 
+
+# https://github.com/RcppCore/Rcpp/issues/1461
+expect_equal(vec_copy(as.numeric(1:10)), as.numeric(1:10))
+expect_equal(vec_copy(numeric(0)), numeric(0))
+