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package vm
import (
"fmt"
"jinx/pkg/lang/vm/code"
"jinx/pkg/lang/vm/mem"
"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
type ErrNullPtrDereference struct {
At mem.Ptr
}
func (e ErrNullPtrDereference) Error() string {
return fmt.Sprintf("null pointer dereference at %v", e.At)
}
type ErrInvalidOp struct {
Op uint8
}
func (e ErrInvalidOp) Error() string {
return fmt.Sprintf("invalid opcode: %d", e.Op)
}
type ErrUnexpectedMemCell struct {
Ptr mem.Ptr
Expected mem.CellKind
Got mem.CellKind
}
func (e ErrUnexpectedMemCell) Error() string {
return fmt.Sprintf("unexpected memory cell at %s: expected %v, got %v", e.Ptr.String(), e.Expected, e.Got)
}
type ErrMemNilCell struct {
Ptr mem.Ptr
}
func (e ErrMemNilCell) Error() string {
return fmt.Sprintf("found no value at %s", e.Ptr.String())
}
type ErrCorruptedMemCell struct {
Ptr mem.Ptr
}
func (e ErrCorruptedMemCell) Error() string {
return fmt.Sprintf("corrupted memory cell at %s", e.Ptr.String())
}
type ErrCantReanchorType struct {
Type value.TypeKind
}
func (e ErrCantReanchorType) Error() string {
return fmt.Sprintf("can't reanchor type of value which already is of type %v", e.Type)
}
// Non-fatal errors, which will later be implemented as catchable exceptions
type ErrInvalidOperandType struct {
Op code.Op
X value.TypeKind
}
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.TypeKind
Y value.TypeKind
}
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)
}
type ErrWrongNumberOfArguments struct {
Needed uint
Got uint
}
func (e ErrWrongNumberOfArguments) Error() string {
return fmt.Sprintf("wrong number of arguments: needed %d, got %d", e.Needed, e.Got)
}
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