exists: compatibility but keep speed

scivision · scivision · commit 76ac5b09eb0c · 2025-09-17T16:23:54.000-04:00
diff --git a/+stdlib/exists.m b/+stdlib/exists.m
@@ -11,7 +11,15 @@
 
 function y = exists(fpath)
 
-y = isfile(fpath) || isfolder(fpath);
+try
+  y = isfile(fpath) || isfolder(fpath);
+catch e
+  if strcmp(e.identifier, 'MATLAB:UndefinedFunction')
+    y = exist(fpath,'file') == 2 || exist(fpath, 'dir') == 7;
+  else
+    rethrow(e)
+  end
+end
 
 end
 
diff --git a/test/TestFilePure.m b/test/TestFilePure.m
@@ -1,5 +1,5 @@
 classdef (SharedTestFixtures={ matlab.unittest.fixtures.PathFixture(fileparts(fileparts(mfilename('fullpath'))))}, ...
-          TestTags = {'R2017b', 'pure'}) ...
+          TestTags = {'R2017a', 'pure'}) ...
     TestFilePure < matlab.unittest.TestCase
 
 
diff --git a/test/TestFilename.m b/test/TestFilename.m
@@ -1,5 +1,5 @@
 classdef (SharedTestFixtures={ matlab.unittest.fixtures.PathFixture(fileparts(fileparts(mfilename('fullpath'))))}, ...
-          TestTags = {'R2017b', 'pure'}) ...
+          TestTags = {'R2017a', 'pure'}) ...
     TestFilename < matlab.unittest.TestCase
 
 properties (TestParameter)
diff --git a/test/TestIsExe.m b/test/TestIsExe.m
@@ -1,5 +1,5 @@
 classdef (SharedTestFixtures={ matlab.unittest.fixtures.PathFixture(fileparts(fileparts(mfilename('fullpath'))))}, ...
-          TestTags = {'R2017b', 'pure'}) ...
+          TestTags = {'R2017a', 'pure'}) ...
     TestIsExe < matlab.unittest.TestCase
 
 properties (TestParameter)
diff --git a/test/TestWhich.m b/test/TestWhich.m
@@ -8,7 +8,7 @@
 end
 
 
-methods (Test, TestTags = {'R2017b'})
+methods (Test, TestTags = {'R2017a'})
 
 function test_which_name(tc)
 
