[14727] | 1 | namespace HeuristicLab.Problems.ProgramSynthesis.Push.Expressions {
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[14777] | 2 | using System;
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| 3 |
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[14727] | 4 | using HeuristicLab.Problems.ProgramSynthesis.Push.Attributes;
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| 5 | using HeuristicLab.Problems.ProgramSynthesis.Push.Interpreter;
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| 6 | using HeuristicLab.Problems.ProgramSynthesis.Push.Stack;
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| 7 |
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[14777] | 8 | [Serializable]
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[14727] | 9 | public abstract class DoCountExpression : LoopExpression {
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| 10 |
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| 11 | protected DoCountExpression() { }
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| 12 | protected DoCountExpression(LoopState state) : base(state) { }
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[14834] | 13 | protected override bool HasInsufficientArguments(IInternalPushInterpreter interpreter, IPushStack<Expression> sourceStack) {
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[14727] | 14 | return interpreter.IntegerStack.Count < 1 ||
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| 15 | sourceStack.Count == 0 ||
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| 16 | interpreter.IntegerStack.Top <= 0;
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| 17 | }
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| 18 |
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[14834] | 19 | protected override LoopState InitState(IInternalPushInterpreter interpreter, IPushStack<Expression> sourceStack) {
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[14777] | 20 | var state = LoopState.Create(interpreter.PoolContainer.LoopStatePool,
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[14727] | 21 | body: sourceStack.Pop(),
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| 22 | currentIndex: 1,
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| 23 | destinationIndex: interpreter.IntegerStack.Top,
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| 24 | incrementor: 1);
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| 25 |
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| 26 | interpreter.IntegerStack.SetTop(0);
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| 27 |
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| 28 | return state;
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| 29 | }
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| 30 | }
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| 31 |
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| 32 | /// <summary>
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| 33 | /// An iteration instruction that performs a loop (the body of which is taken from the CODE stack) the number of times
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| 34 | /// indicated by
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| 35 | /// the INTEGER argument, pushing an index (which runs from zero to one less than the number of iterations) onto the
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| 36 | /// INTEGER stack
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| 37 | /// prior to each execution of the loop body. This should be implemented as a macro that expands into a call to
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| 38 | /// CODE.DO*RANGE.
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| 39 | /// CODE.DO*COUNT takes a single INTEGER argument (the number of times that the loop will be executed) and a single
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| 40 | /// CODE argument
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| 41 | /// (the body of the loop). If the provided INTEGER argument is negative or zero then this becomes a NOOP. Otherwise it
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| 42 | /// expands into:
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| 43 | /// ( 0 '1 - IntegerArg>' CODE.QUOTE 'CodeArg' CODE.DO*RANGE )
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| 44 | /// </summary>
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[14777] | 45 | [Serializable]
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| 46 | [PushExpression(StackTypes.Code, "CODE.DO*COUNT", StackTypes.Integer)]
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[14727] | 47 | public class CodeDoCountExpression : DoCountExpression {
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| 48 |
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| 49 | public CodeDoCountExpression() { }
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| 50 |
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| 51 | public CodeDoCountExpression(LoopState state) : base(state) { }
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| 52 |
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[14834] | 53 | public override bool Eval(IInternalPushInterpreter interpreter) {
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[14908] | 54 | return Eval(interpreter, interpreter.CodeStack);
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[14727] | 55 | }
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| 56 |
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[14834] | 57 | protected override LoopExpression Clone(LoopState state, IInternalPushInterpreter interpreter) {
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[14777] | 58 | var expression = interpreter.PoolContainer.GetStatefulExpression<CodeDoCountExpression>();
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| 59 | expression.State = state;
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| 60 |
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| 61 | return expression;
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[14727] | 62 | }
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| 63 | }
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| 64 |
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| 65 | /// <summary>
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| 66 | /// An iteration instruction that performs a loop (the body of which is taken from the EXEC stack) the number of times
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| 67 | /// indicated
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| 68 | /// by the INTEGER argument, pushing an index (which runs from zero to one less than the number of iterations) onto the
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| 69 | /// INTEGER
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| 70 | /// stack prior to each execution of the loop body. This is similar to CODE.DO*COUNT except that it takes its code
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| 71 | /// argument from
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| 72 | /// the EXEC stack. This should be implemented as a macro that expands into a call to EXEC.DO*RANGE. EXEC.DO*COUNT
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| 73 | /// takes a single
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| 74 | /// INTEGER argument (the number of times that the loop will be executed) and a single EXEC argument (the body of the
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| 75 | /// loop). If
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| 76 | /// the provided INTEGER argument is negative or zero then this becomes a NOOP. Otherwise it expands into:
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| 77 | /// ( 0 '1 - IntegerArg' EXEC.DO* RANGE'ExecArg' )
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| 78 | /// </summary>
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[14777] | 79 | [Serializable]
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| 80 | [PushExpression(StackTypes.Exec, "EXEC.DO*COUNT", StackTypes.Integer)]
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[14727] | 81 | public class ExecDoCountExpression : DoCountExpression {
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| 82 | public ExecDoCountExpression() { }
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| 83 | public ExecDoCountExpression(LoopState state) : base(state) { }
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| 84 |
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[14834] | 85 | public override bool Eval(IInternalPushInterpreter interpreter) {
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[14908] | 86 | return Eval(interpreter, interpreter.ExecStack);
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[14727] | 87 | }
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| 88 |
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[14834] | 89 | protected override LoopExpression Clone(LoopState state, IInternalPushInterpreter interpreter) {
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[14777] | 90 | var expression = interpreter.PoolContainer.GetStatefulExpression<ExecDoCountExpression>();
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| 91 | expression.State = state;
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| 92 |
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| 93 | return expression;
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[14727] | 94 | }
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| 95 | }
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| 96 | } |
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