add $$str_member() function

just like $$member(), but operates on a string value rather than a list
variable. it is the swiss army knife of cutting, providing equivalents
of left(), right(), mid() and reverse() all in one.

[ChangeLog][qmake] Added $$str_member() function.

Change-Id: I7c7c6c971db402fff41b428d32a4451f45400728
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/auto/tools/qmakelib/evaltest.cpp b/tests/auto/tools/qmakelib/evaltest.cpp
index f12b11261a..03fbf96a9f 100644
--- a/tests/auto/tools/qmakelib/evaltest.cpp
+++ b/tests/auto/tools/qmakelib/evaltest.cpp
@@ -718,6 +718,49 @@ void tst_qmakelib::addReplaceFunctions(const QString &qindir)
             << "##:2: member() argument 2 (start) '4..foo' invalid."
             << true;
 
+    // The argument processing is shared with $$member(), so some tests are skipped.
+    QTest::newRow("$$str_member(): empty")
+            << "VAR = $$str_member()"
+            << "VAR ="
+            << ""
+            << true;
+
+    QTest::newRow("$$str_member(): too short")
+            << "VAR = $$str_member(string_value, 7, 12)"
+            << "VAR ="  // this is actually kinda stupid
+            << ""
+            << true;
+
+    QTest::newRow("$$str_member(): ok")
+            << "VAR = $$str_member(string_value, 7, 11)"
+            << "VAR = value"
+            << ""
+            << true;
+
+    QTest::newRow("$$str_member(): ok (default start)")
+            << "VAR = $$str_member(string_value)"
+            << "VAR = s"
+            << ""
+            << true;
+
+    QTest::newRow("$$str_member(): ok (default end)")
+            << "VAR = $$str_member(string_value, 7)"
+            << "VAR = v"
+            << ""
+            << true;
+
+    QTest::newRow("$$str_member(): negative")
+            << "VAR = $$str_member(string_value, -5, -3)"
+            << "VAR = val"
+            << ""
+            << true;
+
+    QTest::newRow("$$str_member(): inverse")
+            << "VAR = $$str_member(string_value, -2, 1)"
+            << "VAR = ulav_gnirt"
+            << ""
+            << true;
+
     QTest::newRow("$$first(): empty")
             << "IN = \nVAR = $$first(IN)"
             << "VAR ="