using CLanguage.Interpreter; using System; namespace CLanguage.Syntax { public class WhileStatement : Statement { public bool IsDo { get; set; } public Expression Condition { get; set; } public Block Loop { get; set; } public override bool AlwaysReturns => false; public WhileStatement(bool isDo, Expression condition, Block loop) { IsDo = isDo; Condition = condition; Loop = loop; } protected override void DoEmit(EmitContext ec) { if (IsDo) throw new NotImplementedException(); Label label = ec.DefineLabel(); Label l = ec.DefineLabel(); Label label2 = ec.DefineLabel(); ec.EmitLabel(label); Condition.Emit(ec); ec.EmitCastToBoolean(Condition.GetEvaluatedCType(ec)); ec.Emit(OpCode.BranchIfFalse, label2); ec.EmitLabel(l); Loop.Emit(ec); ec.Emit(OpCode.Jump, label); ec.EmitLabel(label2); } public override string ToString() { if (IsDo) return string.Format("do {1} while({0});", Condition, Loop); return $"""{Condition}""{Loop}"""; } } }