71 lines
1.8 KiB
C#
71 lines
1.8 KiB
C#
using Canon.Core.CodeGenerators;
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using Canon.Core.Enums;
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using Canon.Core.LexicalParser;
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namespace Canon.Core.SyntaxNodes;
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public class SubprogramHead : NonTerminatedSyntaxNode
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{
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public override NonTerminatorType Type => NonTerminatorType.SubprogramHead;
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public bool IsProcedure { get; private init; }
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/// <summary>
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/// 子程序的名称
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/// </summary>
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public IdentifierSemanticToken SubprogramName =>
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(IdentifierSemanticToken)Children[1].Convert<TerminatedSyntaxNode>().Token;
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/// <summary>
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/// 子程序的参数
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/// </summary>
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public IEnumerable<Parameter> Parameters => Children[2].Convert<FormalParameter>().Parameters;
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public static SubprogramHead Create(List<SyntaxNodeBase> children)
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{
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bool isProcedure;
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TerminatedSyntaxNode node = children[0].Convert<TerminatedSyntaxNode>();
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KeywordSemanticToken token = (KeywordSemanticToken)node.Token;
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if (token.KeywordType == KeywordType.Procedure)
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{
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isProcedure = true;
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}
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else if (token.KeywordType == KeywordType.Function)
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{
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isProcedure = false;
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}
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else
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{
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throw new InvalidOperationException();
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}
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return new SubprogramHead { Children = children, IsProcedure = isProcedure };
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}
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public override void GenerateCCode(CCodeBuilder builder)
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{
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//可能要用到符号表
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if (IsProcedure)
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{
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builder.AddString("void ");
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}
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else
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{
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//返回类型暂时未知
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builder.AddString("int ");
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}
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builder.AddString(SubprogramName.LiteralValue);
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builder.AddString("(");
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foreach (var param in Parameters)
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{
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}
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builder.AddString(")");
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}
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}
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