Canon/Canon.Core/SyntaxNodes/Statement.cs
jackfiled 6130adfa7c feat: 按照open_set中的示例调整语法 (#71)
添加了构建LR分析表冲突的报错

Reviewed-on: PostGuard/Canon#71
2024-05-01 21:06:27 +08:00

104 lines
2.9 KiB
C#

using Canon.Core.Abstractions;
using Canon.Core.CodeGenerators;
using Canon.Core.Enums;
using Canon.Core.LexicalParser;
namespace Canon.Core.SyntaxNodes;
public class AssignGeneratorEventArgs : EventArgs
{
public required Variable Variable { get; init; }
public required Expression Expression { get; init; }
}
public class IfGeneratorEventArgs : EventArgs
{
public required Expression Condition { get; init; }
public required Statement Sentence { get; init; }
public required ElsePart ElseSentence { get; init; }
}
public class ForGeneratorEventArgs : EventArgs
{
public required IdentifierSemanticToken Iterator { get; init; }
public required Expression Begin { get; init; }
public required Expression End { get; init; }
public required Statement Sentence { get; init; }
}
public class Statement : NonTerminatedSyntaxNode
{
public override NonTerminatorType Type => NonTerminatorType.Statement;
public override void PreVisit(SyntaxNodeVisitor visitor)
{
visitor.PreVisit(this);
RaiseEvent();
}
public override void PostVisit(SyntaxNodeVisitor visitor)
{
visitor.PostVisit(this);
RaiseEvent();
}
/// <summary>
/// 使用赋值产生式的事件
/// </summary>
public event EventHandler<AssignGeneratorEventArgs>? OnAssignGenerator;
/// <summary>
/// 使用If产生式的事件
/// </summary>
public event EventHandler<IfGeneratorEventArgs>? OnIfGenerator;
/// <summary>
/// 使用For产生式的事件
/// </summary>
public event EventHandler<ForGeneratorEventArgs>? OnForGenerator;
public static Statement Create(List<SyntaxNodeBase> children)
{
return new Statement { Children = children };
}
private void RaiseEvent()
{
if (Children.Count == 3)
{
OnAssignGenerator?.Invoke(this,
new AssignGeneratorEventArgs
{
Variable = Children[0].Convert<Variable>(), Expression = Children[2].Convert<Expression>()
});
}
else if (Children.Count == 5)
{
OnIfGenerator?.Invoke(this,
new IfGeneratorEventArgs
{
Condition = Children[1].Convert<Expression>(),
Sentence = Children[3].Convert<Statement>(),
ElseSentence = Children[4].Convert<ElsePart>()
});
}
else if (Children.Count == 8)
{
OnForGenerator?.Invoke(this,
new ForGeneratorEventArgs
{
Iterator = Children[1].Convert<TerminatedSyntaxNode>().Token.Convert<IdentifierSemanticToken>(),
Begin = Children[3].Convert<Expression>(),
End = Children[5].Convert<Expression>(),
Sentence = Children[7].Convert<Statement>()
});
}
}
}