private JsExpression CompileImportedTypeCheckCode(IType type, ref JsExpression @this, IRuntimeContext context, bool isTypeIs)
{
var def = type.GetDefinition();
if (def == null)
{
return(null);
}
var ia = AttributeReader.ReadAttribute <ImportedAttribute>(def);
if (ia == null || string.IsNullOrEmpty(ia.TypeCheckCode))
{
return(null);
}
// Can ignore errors here because they are caught by the metadata importer
var method = MetadataUtils.CreateTypeCheckMethod(type, _compilation);
var tokens = InlineCodeMethodCompiler.Tokenize(method, ia.TypeCheckCode, _ => {});
int thisCount = tokens.Count(t => t.Type == InlineCodeToken.TokenType.This);
if (!isTypeIs || thisCount > 0)
{
@this = context.EnsureCanBeEvaluatedMultipleTimes(@this, new JsExpression[0]);
}
return(JsExpression.LogicalAnd(
ReferenceNotEquals(@this, JsExpression.Null, context),
InlineCodeMethodCompiler.CompileExpressionInlineCodeMethodInvocation(method, tokens, @this, EmptyList <JsExpression> .Instance, n => { var t = ReflectionHelper.ParseReflectionName(n).Resolve(_compilation); return t.Kind == TypeKind.Unknown ? JsExpression.Null : InstantiateType(t, context); }, t => InstantiateTypeForUseAsTypeArgumentInInlineCode(t, context), _ => {})));
}
private JsExpression GenerateStructEqualsMethod(ITypeDefinition type, string typeVariableName)
{
var o = JsExpression.Identifier("o");
var parts = new List <JsExpression>();
foreach (var f in type.Fields.Where(f => !f.IsStatic))
{
var expr = GenerateFieldCompare(f, o);
if (expr != null)
{
parts.Add(expr);
}
}
JsExpression typeCompare = JsExpression.Invocation(JsExpression.Member(_systemScript, "isInstanceOfType"), o, JsExpression.Identifier(typeVariableName));
if (parts.Count == 0)
{
return(JsExpression.FunctionDefinition(new[] { "o" }, JsStatement.Return(typeCompare)));
}
else
{
return(JsExpression.FunctionDefinition(new[] { "o" }, JsStatement.Block(
JsStatement.If(JsExpression.LogicalNot(typeCompare),
JsStatement.Return(JsExpression.False),
null
),
JsStatement.Return(parts.Aggregate((old, p) => old == null ? p : JsExpression.LogicalAnd(old, p)))
)));
}
}
