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using System;
using Mono.Cecil;
using Mono.Cecil.Cil;
using StardewModdingAPI.Framework.ModLoading.Framework;
namespace StardewModdingAPI.Framework.ModLoading.Finders
{
/// <summary>Finds incompatible CIL instructions that reference a given field.</summary>
internal class FieldFinder : BaseInstructionHandler
{
/*********
** Fields
*********/
/// <summary>The full type name for which to find references.</summary>
private readonly string FullTypeName;
/// <summary>The field name for which to find references.</summary>
private readonly string FieldName;
/// <summary>The result to return for matching instructions.</summary>
private readonly InstructionHandleResult Result;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="fullTypeName">The full type name for which to find references.</param>
/// <param name="fieldName">The field name for which to find references.</param>
/// <param name="result">The result to return for matching instructions.</param>
public FieldFinder(string fullTypeName, string fieldName, InstructionHandleResult result)
: base(defaultPhrase: $"{fullTypeName}.{fieldName} field")
{
this.FullTypeName = fullTypeName;
this.FieldName = fieldName;
this.Result = result;
}
/// <summary>Rewrite a CIL instruction reference if needed.</summary>
/// <param name="module">The assembly module containing the instruction.</param>
/// <param name="cil">The CIL processor.</param>
/// <param name="instruction">The CIL instruction to handle.</param>
/// <param name="replaceWith">Replaces the CIL instruction with a new one.</param>
/// <returns>Returns whether the instruction was changed.</returns>
public override bool Handle(ModuleDefinition module, ILProcessor cil, Instruction instruction, Action<Instruction> replaceWith)
{
if (!this.Flags.Contains(this.Result) && RewriteHelper.IsFieldReferenceTo(instruction, this.FullTypeName, this.FieldName))
this.MarkFlag(this.Result);
return false;
}
}
}
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