fix: improve multiple define

The VM Vassign instruction now takes an argument to indicates the
number of assignations to perform on the stack.
Definitions with a function returning multiple values now work.
There is still some simplifications, and also to apply the same
strategy to var declarations with assign.

1 files changed, 7 insertions, 2 deletions

diff --git a/vm/vm.go b/vm/vm.go
index f5bb78e..96d61eb 100644
--- a/vm/vm.go
+++ b/vm/vm.go
@@ -311,8 +311,13 @@ func (m *Machine) Run() (err error) {
 			mem[sp-3].SetMapIndex(mem[sp-2].Value, mem[sp-1].Value)
 			mem = mem[:sp-2]
 		case Vassign:
-			mem[sp-2].Set(mem[sp-1].Value)
-			mem = mem[:sp-2]
+			n := c.Arg[0]
+			for i := 0; i < n; i++ {
+				mem[sp-n-i-1].Set(mem[sp-n+i].Value)
+			}
+			mem = mem[:sp-n-1]
+			// mem[sp-2].Set(mem[sp-1].Value)
+			// mem = mem[:sp-2]
 		}
 		ip++
 	}