syntax: implement ES6-like spread operator

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 28 insertions, 0 deletions

diff --git a/tests/00_syntax/15_function_declarations b/tests/00_syntax/15_function_declarations
index 1ed6f83..f02f90a 100644
--- a/tests/00_syntax/15_function_declarations
+++ b/tests/00_syntax/15_function_declarations
@@ -96,3 +96,31 @@ function variadic_2(...args) { ... }
 	]), "\n");
 %}
 -- End --
+
+
+Complementary to the "rest" argument syntax, the spread operator may be
+used in function call arguments to pass arrays of values as argument list.
+
+-- Expect stdout --
+[ 1, 2, 3, 4, 5, 6 ]
+[ 4, 5, 6, 1, 2, 3 ]
+[ 1, 2, 3, 1, 2, 3 ]
+[ 1, 2, 3 ]
+-- End --
+
+-- Testcase --
+{%
+	arr = [ 1, 2, 3 ];
+
+	function test(...args) {
+		return args;
+	}
+
+	print(join("\n", [
+		test(...arr, 4, 5, 6),
+		test(4, 5, 6, ...arr),
+		test(...arr, ...arr),
+		test(...arr)
+	]), "\n");
+%}
+-- End --