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Local Variables 22

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This commit is contained in:
nazrin 2025-06-07 23:52:16 +00:00
parent 4f2211eb72
commit 72a41e81e6
18 changed files with 1335 additions and 115 deletions
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35
src/clox/vm.d
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@ -12,19 +12,21 @@ import clox.compiler;
import clox.memory;
import clox.container.stack;
import clox.container.table;
import clox.container.varint;
VM vm;
struct VM{
Chunk* chunk;
ubyte* ip;
Stack!(Value, 256) stack;
Stack!Value stack;
Table globals;
Table strings;
Obj* objects;
bool isREPL;
enum InterpretResult{ Ok, CompileError, RuntimeError }
void initialise(){
stack.reset();
stack.initialise();
strings.initialise();
globals.initialise();
}
@ -32,6 +34,7 @@ struct VM{
freeObjects();
strings.free();
globals.free();
stack.free();
}
InterpretResult interpret(const char* source){
Chunk cnk;
@ -42,21 +45,27 @@ struct VM{
if(!compiler.compile(source, &cnk))
return InterpretResult.CompileError;
this.chunk = &cnk;
this.ip = cnk.code;
this.ip = cnk.code.ptr;
return run();
}
void runtimeError(Args...)(const char* format, Args args){
fprintf(stderr, format, args);
fputs("\n", stderr);
size_t instruction = vm.ip - vm.chunk.code - 1;
int line = vm.chunk.lines[instruction];
size_t instruction = vm.ip - vm.chunk.code.ptr - 1;
uint line = vm.chunk.lines[instruction];
fprintf(stderr, "[line %d] in script\n", line);
stack.reset();
}
InterpretResult run(){
ubyte readByte() => *vm.ip++;
auto readConstant() => chunk.constants.values[readByte()];
ubyte readByte() => *ip++;
long readVarUint(){
VarUint vi = VarUint.read(ip);
ip += vi.len;
return vi.i;
}
Value readConstant(){
return chunk.constants[readVarUint()];
}
Obj.String* readString() => readConstant().asObj.asString;
Value peek(int distance = 0) => stack.top[-1 - distance];
bool checkBinaryType(alias type)() => peek(0).isType(type) && peek(1).isType(type);
@ -73,7 +82,7 @@ struct VM{
}
while(true){
debug(traceExec){
disassembleInstruction(vm.chunk, cast(int)(vm.ip - vm.chunk.code));
disassembleInstruction(vm.chunk, vm.ip - vm.chunk.code.ptr);
printf(" ");
foreach(slot; stack.live){
printf("");
@ -93,6 +102,14 @@ struct VM{
case OpCode.False: stack.push(Value.from(false)); break;
case OpCode.Pop: stack.pop(); break;
case OpCode.GetLocal:
long slot = readVarUint();
stack.push(stack[slot]);
break;
case OpCode.SetLocal:
long slot = readVarUint();
stack[slot] = peek(0);
break;
case OpCode.GetGlobal:
Obj.String* name = readString();
Value value;