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package vm
import (
"errors"
"fmt"
"jinx/pkg/lang/vm/code"
"jinx/pkg/lang/vm/text"
"jinx/pkg/lang/vm/value"
)
type Error struct {
Pc int
Line int
Err error
}
func (e Error) Error() string {
if e.Line == -1 {
return fmt.Sprintf("vm error at pc %d, unknown line: %v", e.Pc, e.Err)
}
return fmt.Sprintf("vm error at pc %d, line %d: %v", e.Pc, e.Line, e.Err)
}
// Fatal errors
var (
ErrStackOverflow = errors.New("stack overflow (max depth: 1000)")
ErrStackUnderflow = errors.New("local stack underflow")
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 {
Index int
Len int
}
func (e ErrLocalIndexOutOfBounds) Error() string {
return fmt.Sprintf("local index out of bounds: %d (len: %d)", e.Index, e.Len)
}
type ErrStackIndexOutOfBounds struct {
Index int
Len int
}
func (e ErrStackIndexOutOfBounds) Error() string {
return fmt.Sprintf("stack index out of bounds: %d (len: %d)", e.Index, e.Len)
}
type ErrInvalidOp struct {
Op uint8
}
func (e ErrInvalidOp) Error() string {
return fmt.Sprintf("invalid opcode: %d", e.Op)
}
// Non-fatal errors, which will later be implemented as catchable exceptions
type ErrInvalidOperandType struct {
Op code.Op
X value.Type
}
func (e ErrInvalidOperandType) Error() string {
return fmt.Sprintf("invalid operand type for op %s: %v", text.OpToString(e.Op), e.X)
}
type ErrInvalidOperandTypes struct {
Op code.Op
X value.Type
Y value.Type
}
func (e ErrInvalidOperandTypes) Error() string {
return fmt.Sprintf("invalid operand types for op %s: %v, %v", text.OpToString(e.Op), e.X, e.Y)
}
type ErrArrayIndexOutOfBounds struct {
Index int
Len int
}
func (e ErrArrayIndexOutOfBounds) Error() string {
return fmt.Sprintf("array index out of bounds: %d (len: %d)", e.Index, e.Len)
}
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