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85 lines
2.1 KiB
85 lines
2.1 KiB
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namespace Smoll.Ex4.Commands {
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interface ICommand{
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void Perform(List<IScriptable> stack);
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}
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class PushNumberCommand : ICommand
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{
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public double self;
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public PushNumberCommand(double value) {
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self = value;
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}
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public void Perform(List<IScriptable> stack)
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{
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stack.Add(new Number(self));;
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}
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}
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class PushStringCommand : ICommand
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{
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public string self;
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public PushStringCommand(string value) {
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self = value;
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}
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public void Perform(List<IScriptable> stack)
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{
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stack.Add(new Commands.String(self));;
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}
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}
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class PushAtomCommand : ICommand
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{
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public string self;
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public PushAtomCommand(string value) {
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self = value;
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}
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public void Perform(List<IScriptable> stack)
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{
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stack.Add(new Commands.Atom(self));;
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}
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}
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class AddNumberCommand : ICommand
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{
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public void Perform(List<IScriptable> stack)
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{
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if(! stack.TakeLast(2).All(x => x is Ex4.Commands.Number)) {
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throw new Exception("Bad arguments to add as numbers");
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}
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var ret = stack.TakeLast(2).Cast<Ex4.Commands.Number>().Select(x => x.value).Sum();
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stack.RemoveAt(stack.Count - 1);
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stack.RemoveAt(stack.Count - 1);
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stack.Add(new Number(ret));
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}
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}
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class PrintCommand : ICommand
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{
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public void Perform(List<IScriptable> stack)
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{
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var ret = stack.Last();
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stack.RemoveAt(stack.Count - 1);
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System.Console.Out.Write(ret.ToString());
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}
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}
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class CompositeCommand : ICommand
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{
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List<ICommand> executable;
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public CompositeCommand(List<ICommand> executable) {
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this.executable = executable;
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}
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public void Perform(List<IScriptable> stack)
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{
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foreach (var item in executable)
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{
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item.Perform(stack);
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}
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}
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}
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}
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