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Types of Values 18

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This commit is contained in:
nazrin 2025-06-05 00:55:26 +00:00
parent 41404633da
commit 10c44eab2e
7 changed files with 230 additions and 28 deletions
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46
src/clox/vm.d
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@ -9,6 +9,7 @@ import clox.util;
import clox.compiler;
import clox.container.stack;
import clox.container.varint;
import clox.container.int24;
enum stackMax = 256;
@ -33,7 +34,16 @@ struct VM{
ip = &chunk.code[0];
return run();
}
private InterpretResult run() @nogc nothrow {
private void runtimeError(Args...)(string format, Args args) nothrow {
size_t instruction = ip - (&chunk.code[0]) - 1;
uint line = chunk.lines[instruction].toUint;
try{
stderr.writef("[line %d] ", line);
stderr.writefln(format, args);
} catch(Exception){}
/* stack.reset(); */
}
private InterpretResult run() nothrow {
auto readByte() => *ip++;
auto readIns() => cast(OpCode)readByte();
Value readConstant(){
@ -41,6 +51,9 @@ struct VM{
ip += constant.len;
return chunk.constants[constant.i];
}
Value peek(int distance = 0){
return stack.top[-1 - distance];
}
while(true){
debug(traceExec){
writeln(" ", stack.live);
@ -52,15 +65,42 @@ struct VM{
Value constant = readConstant();
stack.push(constant);
break;
case True:
stack.push(Value.bln(true));
break;
case False:
stack.push(Value.bln(false));
break;
case Nil:
stack.push(Value.nil());
break;
static foreach(k, op; [ Add: "+", Subtract: "-", Multiply: "*", Divide: "/" ]){
case k:
if(!peek(0).isNum || !peek(1).isNum){
runtimeError("Operands must be numbers.");
return InterpretResult.RuntimeError;
}
double b = stack.pop().getNum;
double a = stack.pop().getNum;
stack.push(Value.num(mixin("a", op, "b")));
break opSwitch;
}
static foreach(k, op; [ NotEqual: "!=", Equal: "==", Greater: ">", GreaterEqual: ">=", Less: "<", LessEqual: "<=" ]){
case k:
Value b = stack.pop();
Value a = stack.pop();
stack.push(mixin("a", op, "b"));
stack.push(Value.bln(compare!op(a, b)));
break opSwitch;
}
case Not:
stack.push(Value.bln(stack.pop().isFalsey));
break;
case Negate:
stack.push(-stack.pop());
if(!peek(0).isNum){
runtimeError("Operand must be a number.");
return InterpretResult.RuntimeError;
}
stack.push(Value.num(-stack.pop().getNum));
break;
case Return:
debug printValue(stack.pop());