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using Mono.Cecil;
using Mono.Cecil.Cil;
namespace StardewModdingAPI.Framework.ModLoading.Finders
{
/// <summary>Finds incompatible CIL instructions that reference a given property.</summary>
internal class PropertyFinder : IInstructionHandler
{
/*********
** Properties
*********/
/// <summary>The full type name for which to find references.</summary>
private readonly string FullTypeName;
/// <summary>The property name for which to find references.</summary>
private readonly string PropertyName;
/// <summary>The result to return for matching instructions.</summary>
private readonly InstructionHandleResult Result;
/*********
** Accessors
*********/
/// <summary>A brief noun phrase indicating what the instruction finder matches.</summary>
public string NounPhrase { get; }
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="fullTypeName">The full type name for which to find references.</param>
/// <param name="propertyName">The property name for which to find references.</param>
/// <param name="result">The result to return for matching instructions.</param>
public PropertyFinder(string fullTypeName, string propertyName, InstructionHandleResult result)
{
this.FullTypeName = fullTypeName;
this.PropertyName = propertyName;
this.Result = result;
this.NounPhrase = $"{fullTypeName}.{propertyName} property";
}
/// <summary>Perform the predefined logic for a method if applicable.</summary>
/// <param name="module">The assembly module containing the instruction.</param>
/// <param name="method">The method definition containing the instruction.</param>
/// <param name="assemblyMap">Metadata for mapping assemblies to the current platform.</param>
/// <param name="platformChanged">Whether the mod was compiled on a different platform.</param>
public virtual InstructionHandleResult Handle(ModuleDefinition module, MethodDefinition method, PlatformAssemblyMap assemblyMap, bool platformChanged)
{
return InstructionHandleResult.None;
}
/// <summary>Perform the predefined logic for an instruction if applicable.</summary>
/// <param name="module">The assembly module containing the instruction.</param>
/// <param name="cil">The CIL processor.</param>
/// <param name="instruction">The instruction to handle.</param>
/// <param name="assemblyMap">Metadata for mapping assemblies to the current platform.</param>
/// <param name="platformChanged">Whether the mod was compiled on a different platform.</param>
public virtual InstructionHandleResult Handle(ModuleDefinition module, ILProcessor cil, Instruction instruction, PlatformAssemblyMap assemblyMap, bool platformChanged)
{
return this.IsMatch(instruction)
? this.Result
: InstructionHandleResult.None;
}
/*********
** Protected methods
*********/
/// <summary>Get whether a CIL instruction matches.</summary>
/// <param name="instruction">The IL instruction.</param>
protected bool IsMatch(Instruction instruction)
{
MethodReference methodRef = RewriteHelper.AsMethodReference(instruction);
return
methodRef != null
&& methodRef.DeclaringType.FullName == this.FullTypeName
&& (methodRef.Name == "get_" + this.PropertyName || methodRef.Name == "set_" + this.PropertyName);
}
}
}
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