29 lines
987 B
C#
29 lines
987 B
C#
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using Convention.RScript.Parser;
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using System.Diagnostics.CodeAnalysis;
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namespace Convention.RScript.Runner
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{
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public class ExitNamespaceRunner : IRSentenceRunner
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{
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[return: MaybeNull]
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public object Run(ExpressionParser parser, RScriptSentence sentence, RScriptContext context)
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{
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// 移除当前命名空间的变量
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foreach (var local in context.CurrentLocalSpaceVariableNames.Peek())
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{
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context.Variables.Remove(local);
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parser.context.Variables.Remove(local);
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}
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// 还原上层命名空间的变量
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foreach (var local in context.CurrentLocalSpaceVariableNames.Peek())
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{
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parser.context.Variables[local] = context.Variables[local].data;
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}
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context.CurrentLocalSpaceVariableNames.Pop();
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// 弹栈
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context.RuntimePointerStack.Pop();
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return null;
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}
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}
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}
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