add $$take_first() and $$take_last() functions

while implementing stacks and queues was possible before with the help
of $$member(), these functions make it much more straight-forward.

[ChangeLog][qmake] Added $$take_first() and $$take_last() functions.

Change-Id: I4922a5331780e468a42c663c9ad3c6456a95a6bf
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, 48 insertions, 0 deletions

diff --git a/tests/auto/tools/qmakelib/evaltest.cpp b/tests/auto/tools/qmakelib/evaltest.cpp
index 4642c822bc..69ccf4858f 100644
--- a/tests/auto/tools/qmakelib/evaltest.cpp
+++ b/tests/auto/tools/qmakelib/evaltest.cpp
@@ -742,6 +742,30 @@ void tst_qmakelib::addReplaceFunctions(const QString &qindir)
             << "##:1: first(var) requires one argument."
             << true;
 
+    QTest::newRow("$$take_first(): empty")
+            << "IN = \nVAR = $$take_first(IN)"
+            << "VAR =\nIN ="
+            << ""
+            << true;
+
+    QTest::newRow("$$take_first(): one")
+            << "IN = one\nVAR = $$take_first(IN)"
+            << "VAR = one\nIN ="
+            << ""
+            << true;
+
+    QTest::newRow("$$take_first(): multiple")
+            << "IN = one two three\nVAR = $$take_first(IN)"
+            << "VAR = one\nIN = two three"
+            << ""
+            << true;
+
+    QTest::newRow("$$take_first(): bad number of arguments")
+            << "VAR = $$take_first(1, 2)"
+            << "VAR ="
+            << "##:1: take_first(var) requires one argument."
+            << true;
+
     QTest::newRow("$$last(): empty")
             << "IN = \nVAR = $$last(IN)"
             << "VAR ="
@@ -766,6 +790,30 @@ void tst_qmakelib::addReplaceFunctions(const QString &qindir)
             << "##:1: last(var) requires one argument."
             << true;
 
+    QTest::newRow("$$take_last(): empty")
+            << "IN = \nVAR = $$take_last(IN)"
+            << "VAR =\nIN ="
+            << ""
+            << true;
+
+    QTest::newRow("$$take_last(): one")
+            << "IN = one\nVAR = $$take_last(IN)"
+            << "VAR = one\nIN ="
+            << ""
+            << true;
+
+    QTest::newRow("$$take_last(): multiple")
+            << "IN = one two three\nVAR = $$take_last(IN)"
+            << "VAR = three\nIN = one two"
+            << ""
+            << true;
+
+    QTest::newRow("$$take_last(): bad number of arguments")
+            << "VAR = $$take_last(1, 2)"
+            << "VAR ="
+            << "##:1: take_last(var) requires one argument."
+            << true;
+
     QTest::newRow("$$size()")
             << "IN = one two three\nVAR = $$size(IN)"
             << "VAR = 3"