// Copyright (c) 2020 Daniel Grunwald
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

namespace ICSharpCode.Decompiler.CSharp.Syntax
{
	/// <summary>
	/// Operator precedence is not represented in the syntax tree; required parentheses are reconstructed by <see cref="ICSharpCode.Decompiler.CSharp.OutputVisitor.InsertParenthesesVisitor"/>.
	/// <c>switch_expression ::= expression 'switch' '{' switch_expression_arm* '}'</c> (C# grammar §12.12)
	/// </summary>
	[DecompilerAstNode(hasNullNode: false)]
	public partial class SwitchExpression : Expression
	{
		public static readonly TokenRole SwitchKeywordRole = new TokenRole("switch");
		public static readonly Role<SwitchExpressionSection> SwitchSectionRole = new Role<SwitchExpressionSection>("SwitchSection", null);

		[Slot("Roles.Expression")]
		public partial Expression Expression { get; set; }

		[Slot("SwitchSectionRole")]
		public partial AstNodeCollection<SwitchExpressionSection> SwitchSections { get; }

		protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
		{
			SwitchExpression o = other as SwitchExpression;
			return o != null && this.Expression.DoMatch(o.Expression, match) && this.SwitchSections.DoMatch(o.SwitchSections, match);
		}
	}

	/// <summary>
	/// <c>switch_expression_arm ::= pattern '=&gt;' expression</c> (C# grammar §12.12)
	/// </summary>
	[DecompilerAstNode(hasNullNode: false)]
	public partial class SwitchExpressionSection : AstNode
	{
		public static readonly Role<Expression> PatternRole = new Role<Expression>("Pattern", Expression.Null);
		public static readonly Role<Expression> BodyRole = new Role<Expression>("Body", Expression.Null);

		[Slot("PatternRole")]
		public partial Expression Pattern { get; set; }

		[Slot("BodyRole")]
		public partial Expression Body { get; set; }

		public override NodeType NodeType => NodeType.Unknown;

		protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
		{
			SwitchExpressionSection o = other as SwitchExpressionSection;
			return o != null && this.Pattern.DoMatch(o.Pattern, match) && this.Body.DoMatch(o.Body, match);
		}
	}
}