Canon/Canon.Core/SyntaxNodes/SubprogramHead.cs

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