Imported Upstream version 2.16.0

[lilypond.git] / input / regression / markup-cyclic-reference.ly

diff --git a/input/regression/markup-cyclic-reference.ly b/input/regression/markup-cyclic-reference.ly
new file mode 100644 (file)
index 0000000..9ca834b
--- /dev/null
+++ b/input/regression/markup-cyclic-reference.ly
@@ -0,0 +1,26 @@
+\version "2.16.0"
+#(ly:set-option 'warning-as-error #f)
+#(ly:expect-warning (ly:translate-cpp-warning-scheme "Cyclic markup detected: %s") 'cycle-markup)
+#(ly:expect-warning (ly:translate-cpp-warning-scheme "Cyclic markup detected: %s") 'cycleI-markup)
+
+\header {
+  texidoc = "Cyclic markup definitions should cause a warning, but
+not crash LilyPond with an endless loop"
+}
+
+% A simple markup function that calls itself in a loop.
+#(define-markup-command (cycle layout props m)
+  (markup?)
+  (interpret-markup layout props (make-cycle-markup m)))
+
+% Two simple markup functions that call each other in a loop.
+#(define-markup-command (cycleI layout props m)
+  (markup?)
+  (interpret-markup layout props (make-cycleII-markup m)))
+#(define-markup-command (cycleII layout props m)
+  (markup?)
+  (interpret-markup layout props (make-cycleI-markup m)))
+
+
+\markup { \cycle "a" }
+\markup { \cycleI "a" }