$ perl -le"die prototype('CORE::splice')"
\@;$$@ at -e line 1.

$ perl -le" sub mysplice (\@$$@){ warn@_}  mysplice @a, 1,1,3,4"
ARRAY(0x3d8bdc)1134 at -e line 1.

$ perl -le" sub mysplice (\@$$@){ warn@_}  mysplice 1"
Type of arg 1 to main::mysplice must be array (not constant item) at -e line 1, at EOF
Not enough arguments for main::mysplice at -e line 1, at EOF
Execution of -e aborted due to compilation errors.

$ perl -le" sub mysplice (\@$$@){ warn@_}  mysplice 1, @a, "
Type of arg 1 to main::mysplice must be array (not constant item) at -e line 1, at EOF
Not enough arguments for main::mysplice at -e line 1, at EOF
Execution of -e aborted due to compilation errors.

$ perl -le" sub mysplice { warn@_}  mysplice \@a, 1, 1"
ARRAY(0x97a0ac)11 at -e line 1.