101 lines
3.3 KiB
C#
101 lines
3.3 KiB
C#
using Canon.Core.Abstractions;
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using Canon.Core.CodeGenerators;
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using Canon.Core.Enums;
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using Canon.Core.SemanticParser;
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namespace Canon.Core.SyntaxNodes;
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public class VarDeclarations : NonTerminatedSyntaxNode
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{
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public override NonTerminatorType Type => NonTerminatorType.VarDeclarations;
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/// <summary>
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/// 声明的变量列表
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/// </summary>
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// public IEnumerable<(IdentifierList, TypeSyntaxNode)> Variables => EnumerateVariables();
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public override void PreVisit(SyntaxNodeVisitor visitor)
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{
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visitor.PreVisit(this);
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}
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public override void PostVisit(SyntaxNodeVisitor visitor)
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{
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visitor.PostVisit(this);
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}
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public static VarDeclarations Create(List<SyntaxNodeBase> children)
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{
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return new VarDeclarations { Children = children };
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}
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// private IEnumerable<(IdentifierList, TypeSyntaxNode)> EnumerateVariables()
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// {
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// if (Children.Count == 0)
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// {
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// yield break;
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// }
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//
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// VarDeclaration declaration = Children[1].Convert<VarDeclaration>();
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//
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// while (true)
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// {
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// yield return declaration.Variable;
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//
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// if (declaration.IsRecursive)
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// {
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// declaration = declaration.Children[0].Convert<VarDeclaration>();
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// }
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// else
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// {
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// break;
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// }
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// }
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// }
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// public override void GenerateCCode(CCodeBuilder builder)
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// {
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// foreach (var pair in Variables.Reverse())
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// {
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// //BasicType定义
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// if (pair.Item2.Children.Count == 1)
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// {
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// //输出类型
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// pair.Item2.GenerateCCode(builder);
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// //输出idList
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// pair.Item1.GenerateCCode(builder);
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// builder.AddString(";");
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// }
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// //array定义
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// else
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// {
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// //构造出C语言形式的数组下标定义
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// string arrayPeriod = "";
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// var ranges = pair.Item2.Children[2]
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// .Convert<Period>().Ranges;
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// PascalType pascalType = pair.Item2.Children[5].Convert<BasicType>().TryGetPascalType();
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//
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// foreach (var range in ranges)
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// {
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// int low = int.Parse(range.Item1.LiteralValue);
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// int high = int.Parse(range.Item2.LiteralValue);
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// arrayPeriod = "[" + System.Convert.ToString(high-low+1) + "]" + arrayPeriod;
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// pascalType = new PascalArrayType(pascalType, low, high); //嵌套地构造出多维数组
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// }
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//
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// //依次定义每一个符号
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// foreach (var id in pair.Item1.Identifiers.Reverse())
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// {
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// pair.Item2.Children[5].GenerateCCode(builder);
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// builder.AddString(" " + id.IdentifierName + arrayPeriod + ";");
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// //写入符号表
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// builder.SymbolTable.TryAddSymbol(new Symbol()
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// {
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// SymbolName = id.IdentifierName, SymbolType = pascalType, Reference = false
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// });
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// }
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// }
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// }
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// }
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}
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