Continuous VM stack implementation

1 files changed, 6 insertions, 5 deletions

diff --git a/pkg/lang/vm/errors.go b/pkg/lang/vm/errors.go
index 045f9a9..bbc66b8 100644
--- a/pkg/lang/vm/errors.go
+++ b/pkg/lang/vm/errors.go
@@ -20,12 +20,13 @@ func (e Error) Error() string {
 // Fatal errors
 
 var (
-	ErrCallStackOverflow   = errors.New("call stack overflow (max depth: 1000)")
-	ErrLocalStackOverflow  = errors.New("local stack overflow (max depth: 1000)")
-	ErrNoPreviousCallFrame = errors.New("no previous call frame")
-	ErrCantPopRootFrame    = errors.New("cannot pop root frame")
+	ErrStackOverflow  = errors.New("stack overflow (max depth: 1000)")
+	ErrStackUnderflow = errors.New("local stack underflow")
 
-	ErrCallFrameEmpty = errors.New("current call frame is empty")
+	ErrReachedMaxCallDepth  = errors.New("reached max call depth (max depth: 1000)")
+	ErrReachedRootCallFrame = errors.New("reached root call frame")
+
+	ErrCallBaseCantBeNegative = errors.New("call base cannot be negative")
 )
 
 type ErrLocalIndexOutOfBounds struct {