From cb712ff37d3c20a21695e00c52fff213a6fd40b4 Mon Sep 17 00:00:00 2001
From: Wim <wim@42.be>
Date: Sun, 16 Jun 2019 23:33:25 +0200
Subject: Update vendor (#852)

---
 vendor/github.com/d5/tengo/runtime/vm.go | 63 +++++++++++++++++++++++++++-----
 1 file changed, 54 insertions(+), 9 deletions(-)

(limited to 'vendor/github.com/d5/tengo/runtime')

diff --git a/vendor/github.com/d5/tengo/runtime/vm.go b/vendor/github.com/d5/tengo/runtime/vm.go
index dde52db5..07f6e530 100644
--- a/vendor/github.com/d5/tengo/runtime/vm.go
+++ b/vendor/github.com/d5/tengo/runtime/vm.go
@@ -642,9 +642,31 @@ func (v *VM) run() {
 
 			switch callee := value.(type) {
 			case *objects.Closure:
+				if callee.Fn.VarArgs {
+					// if the closure is variadic,
+					// roll up all variadic parameters into an array
+					realArgs := callee.Fn.NumParameters - 1
+					varArgs := numArgs - realArgs
+					if varArgs >= 0 {
+						numArgs = realArgs + 1
+						args := make([]objects.Object, varArgs)
+						spStart := v.sp - varArgs
+						for i := spStart; i < v.sp; i++ {
+							args[i-spStart] = v.stack[i]
+						}
+						v.stack[spStart] = &objects.Array{Value: args}
+						v.sp = spStart + 1
+					}
+				}
+
 				if numArgs != callee.Fn.NumParameters {
-					v.err = fmt.Errorf("wrong number of arguments: want=%d, got=%d",
-						callee.Fn.NumParameters, numArgs)
+					if callee.Fn.VarArgs {
+						v.err = fmt.Errorf("wrong number of arguments: want>=%d, got=%d",
+							callee.Fn.NumParameters-1, numArgs)
+					} else {
+						v.err = fmt.Errorf("wrong number of arguments: want=%d, got=%d",
+							callee.Fn.NumParameters, numArgs)
+					}
 					return
 				}
 
@@ -674,9 +696,31 @@ func (v *VM) run() {
 				v.sp = v.sp - numArgs + callee.Fn.NumLocals
 
 			case *objects.CompiledFunction:
+				if callee.VarArgs {
+					// if the closure is variadic,
+					// roll up all variadic parameters into an array
+					realArgs := callee.NumParameters - 1
+					varArgs := numArgs - realArgs
+					if varArgs >= 0 {
+						numArgs = realArgs + 1
+						args := make([]objects.Object, varArgs)
+						spStart := v.sp - varArgs
+						for i := spStart; i < v.sp; i++ {
+							args[i-spStart] = v.stack[i]
+						}
+						v.stack[spStart] = &objects.Array{Value: args}
+						v.sp = spStart + 1
+					}
+				}
+
 				if numArgs != callee.NumParameters {
-					v.err = fmt.Errorf("wrong number of arguments: want=%d, got=%d",
-						callee.NumParameters, numArgs)
+					if callee.VarArgs {
+						v.err = fmt.Errorf("wrong number of arguments: want>=%d, got=%d",
+							callee.NumParameters-1, numArgs)
+					} else {
+						v.err = fmt.Errorf("wrong number of arguments: want=%d, got=%d",
+							callee.NumParameters, numArgs)
+					}
 					return
 				}
 
@@ -707,9 +751,7 @@ func (v *VM) run() {
 
 			case objects.Callable:
 				var args []objects.Object
-				for _, arg := range v.stack[v.sp-numArgs : v.sp] {
-					args = append(args, arg)
-				}
+				args = append(args, v.stack[v.sp-numArgs:v.sp]...)
 
 				ret, e := callee.Call(args...)
 				v.sp -= numArgs + 1
@@ -817,9 +859,12 @@ func (v *VM) run() {
 			val := v.stack[v.sp-numSelectors-1]
 			v.sp -= numSelectors + 1
 
-			sp := v.curFrame.basePointer + localIndex
+			dst := v.stack[v.curFrame.basePointer+localIndex]
+			if obj, ok := dst.(*objects.ObjectPtr); ok {
+				dst = *obj.Value
+			}
 
-			if e := indexAssign(v.stack[sp], val, selectors); e != nil {
+			if e := indexAssign(dst, val, selectors); e != nil {
 				v.err = e
 				return
 			}
-- 
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