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Produce analyzer errors for invalid generic arguments in converters and validators

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Closes #103
This commit is contained in:
Oleksii Holub
2022-04-16 22:54:11 +00:00
committed by GitHub
parent c7015181e1
commit 41cb8647b5
20 changed files with 188 additions and 61 deletions
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14
CliFx.Analyzers/ParameterMustHaveValidConverterAnalyzer.cs
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@@ -13,7 +13,7 @@ public class ParameterMustHaveValidConverterAnalyzer : AnalyzerBase
public ParameterMustHaveValidConverterAnalyzer()
: base(
$"Parameter converters must derive from `{SymbolNames.CliFxBindingConverterClass}`",
$"Converter specified for this parameter must derive from `{SymbolNames.CliFxBindingConverterClass}`.")
$"Converter specified for this parameter must derive from a compatible `{SymbolNames.CliFxBindingConverterClass}`.")
{
}
@@ -29,13 +29,15 @@ public class ParameterMustHaveValidConverterAnalyzer : AnalyzerBase
if (parameter.ConverterType is null)
return;
// We check against an internal interface because checking against a generic class is a pain
var converterImplementsInterface = parameter
var converterValueType = parameter
.ConverterType
.AllInterfaces
.Any(s => s.DisplayNameMatches(SymbolNames.CliFxBindingConverterInterface));
.GetBaseTypes()
.FirstOrDefault(t => t.ConstructedFrom.DisplayNameMatches(SymbolNames.CliFxBindingConverterClass))?
.TypeArguments
.FirstOrDefault();
if (!converterImplementsInterface)
// Value returned by the converter must be assignable to the property type
if (converterValueType is null || !property.Type.IsAssignableFrom(converterValueType))
{
context.ReportDiagnostic(CreateDiagnostic(propertyDeclaration.GetLocation()));
}