public override void EmitCode(IBlockContext context, bool dropResult) { if (condition.ResultType(context) != BuiltinType.Bool) { context.AddError( new StructuralError( StructuralError.ErrorType.InvalidType, "Condition of while is not a boolean", Start, End ) ); } IBlockContext tmpContext = context.CreateLoopContext(context.IL.DefineLabel(false), context.IL.DefineLabel(false)); Dictionary <string, TO2Type> scopeVariables = condition.GetScopeVariables(tmpContext); if (scopeVariables != null) { foreach (var(name, type) in scopeVariables) { tmpContext.DeclaredVariable(name, true, type.UnderlyingType(context.ModuleContext)); } } ILCount conditionCount = condition.GetILCount(tmpContext, false); ILCount loopCount = loopExpression.GetILCount(tmpContext, true); if (loopCount.stack > 0) { context.AddError( new StructuralError( StructuralError.ErrorType.CoreGeneration, "Body of the while expression leaves values on stack. This must not happen", Start, End ) ); return; } if (context.HasErrors) { return; } using ITempLocalRef loopCounter = context.IL.TempLocal(typeof(int)); LabelRef whileStart = context.IL.DefineLabel(conditionCount.opCodes + loopCount.opCodes < 110); LabelRef whileEnd = context.IL.DefineLabel(conditionCount.opCodes + loopCount.opCodes < 110); LabelRef whileLoop = context.IL.DefineLabel(conditionCount.opCodes + loopCount.opCodes < 100); IBlockContext loopContext = context.CreateLoopContext(whileStart, whileEnd); if (scopeVariables != null) { foreach (var(name, type) in scopeVariables) { if (loopContext.FindVariable(name) != null) { loopContext.AddError(new StructuralError( StructuralError.ErrorType.DuplicateVariableName, $"Variable '{name}' already declared in this scope", Start, End )); return; } loopContext.DeclaredVariable(name, true, type.UnderlyingType(context.ModuleContext)); } } loopContext.IL.Emit(whileStart.isShort ? OpCodes.Br_S : OpCodes.Br, whileStart); context.IL.MarkLabel(whileLoop); // Timeout check LabelRef skipCheck = context.IL.DefineLabel(true); loopCounter.EmitLoad(loopContext); loopContext.IL.Emit(OpCodes.Ldc_I4_1); loopContext.IL.Emit(OpCodes.Add); loopContext.IL.Emit(OpCodes.Dup); loopCounter.EmitStore(loopContext); loopContext.IL.Emit(OpCodes.Ldc_I4, 10000); loopContext.IL.Emit(OpCodes.Cgt); loopContext.IL.Emit(OpCodes.Brfalse, skipCheck); loopContext.IL.Emit(OpCodes.Ldc_I4_0); loopCounter.EmitStore(loopContext); context.IL.EmitCall(OpCodes.Call, typeof(Runtime.ContextHolder).GetMethod("CheckTimeout"), 0); loopContext.IL.MarkLabel(skipCheck); loopExpression.EmitCode(loopContext, true); loopContext.IL.MarkLabel(whileStart); condition.EmitCode(loopContext, false); loopContext.IL.Emit(whileLoop.isShort ? OpCodes.Brtrue_S : OpCodes.Brtrue, whileLoop); loopContext.IL.MarkLabel(whileEnd); if (!dropResult) { context.IL.Emit(OpCodes.Ldnull); } }
public override void EmitCode(IBlockContext context, bool dropResult) { RealizedType sourceType = sourceExpression.ResultType(context).UnderlyingType(context.ModuleContext); IForInSource source = sourceType.ForInSource(context.ModuleContext, variableType); if (source == null) { context.AddError( new StructuralError( StructuralError.ErrorType.InvalidType, $"{sourceType} cannot be use as for ... in source", Start, End ) ); } if (context.FindVariable(variableName) != null) { context.AddError(new StructuralError( StructuralError.ErrorType.DuplicateVariableName, $"Variable '{variableName}' already declared in this scope", Start, End )); } if (source != null && variableType != null && !variableType.IsAssignableFrom(context.ModuleContext, source.ElementType)) { context.AddError( new StructuralError( StructuralError.ErrorType.InvalidType, $"{sourceType} has elements of type {source.ElementType}, expected {variableType}", Start, End ) ); } if (context.HasErrors) { return; } using ITempLocalRef loopCounter = context.IL.TempLocal(typeof(int)); ILCount loopSize = EstimateLoop(context, source); LabelRef start = context.IL.DefineLabel(loopSize.opCodes < 110); LabelRef end = context.IL.DefineLabel(loopSize.opCodes < 110); LabelRef loop = context.IL.DefineLabel(loopSize.opCodes < 100); IBlockContext loopContext = context.CreateLoopContext(start, end); IBlockVariable loopVariable = loopContext.DeclaredVariable(variableName, true, source !.ElementType); sourceExpression.EmitCode(context, false); if (context.HasErrors) { return; } source.EmitInitialize(loopContext); loopContext.IL.Emit(start.isShort ? OpCodes.Br_S : OpCodes.Br, start); loopContext.IL.MarkLabel(loop); // Timeout check LabelRef skipCheck = context.IL.DefineLabel(true); loopCounter.EmitLoad(loopContext); loopContext.IL.Emit(OpCodes.Ldc_I4_1); loopContext.IL.Emit(OpCodes.Add); loopContext.IL.Emit(OpCodes.Dup); loopCounter.EmitStore(loopContext); loopContext.IL.Emit(OpCodes.Ldc_I4, 10000); loopContext.IL.Emit(OpCodes.Cgt); loopContext.IL.Emit(OpCodes.Brfalse, skipCheck); loopContext.IL.Emit(OpCodes.Ldc_I4_0); loopCounter.EmitStore(loopContext); context.IL.EmitCall(OpCodes.Call, typeof(Runtime.ContextHolder).GetMethod("CheckTimeout"), 0); loopContext.IL.MarkLabel(skipCheck); source.EmitNext(loopContext); loopVariable.EmitStore(loopContext); loopExpression.EmitCode(loopContext, true); loopContext.IL.MarkLabel(start); source.EmitCheckDone(loopContext, loop); loopContext.IL.MarkLabel(end); if (!dropResult) { context.IL.Emit(OpCodes.Ldnull); } }