72 lines
1.6 KiB
Go
72 lines
1.6 KiB
Go
/*
|
|
Serene --- Yet an other Lisp
|
|
|
|
Copyright (c) 2020 Sameer Rahmani <lxsameer@gnu.org>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package core
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"serene-lang.org/bootstrap/pkg/ast"
|
|
"serene-lang.org/bootstrap/pkg/hash"
|
|
)
|
|
|
|
type instructionType int
|
|
|
|
const (
|
|
PopStack instructionType = iota
|
|
)
|
|
|
|
type Instruction struct {
|
|
Node
|
|
ExecutionScope
|
|
Type instructionType
|
|
}
|
|
|
|
func (n *Instruction) GetType() ast.NodeType {
|
|
return ast.Instruction
|
|
}
|
|
|
|
func (n *Instruction) String() string {
|
|
return fmt.Sprintf("<instruction:%d>", n.Type)
|
|
}
|
|
|
|
func (n *Instruction) ToDebugStr() string {
|
|
return n.String()
|
|
}
|
|
|
|
func (n *Instruction) Hash() uint32 {
|
|
bytes := []byte(fmt.Sprintf("%d", n.Type))
|
|
return hash.HashOf(append([]byte{byte(ast.Instruction)}, bytes...))
|
|
}
|
|
|
|
func MakeStackPop(rt *Runtime) IExpr {
|
|
return &Instruction{
|
|
Type: PopStack,
|
|
}
|
|
}
|
|
|
|
func ProcessInstruction(rt *Runtime, form *Instruction) IError {
|
|
switch form.Type {
|
|
case PopStack:
|
|
rt.Stack.Pop()
|
|
return nil
|
|
default:
|
|
panic(fmt.Sprintf("Unknown instruction: '%d'", form.Type))
|
|
}
|
|
}
|