private static Func <TIn, TOut> CompileFromFingerprint(Expression <Func <TIn, TOut> > expr)
{
List <object> capturedConstants;
ExpressionFingerprintChain fingerprint =
FingerprintingExpressionVisitor.GetFingerprintChain(
expr,
out capturedConstants
);
if (fingerprint != null)
{
var del = _fingerprintedCache.GetOrAdd(
fingerprint,
_ =>
{
// Fingerprinting succeeded, but there was a cache miss. Rewrite the expression
// and add the rewritten expression to the cache.
var hoistedExpr = HoistingExpressionVisitor <TIn, TOut> .Hoist(expr);
return(hoistedExpr.Compile());
}
);
return(model => del(model, capturedConstants));
}
// couldn't be fingerprinted
return(null);
}
private static Func <TIn, TOut> CompileFromFingerprint(Expression <Func <TIn, TOut> > expr)
{
List <object> capturedConstants;
ExpressionFingerprintChain fingerprintChain = FingerprintingExpressionVisitor.GetFingerprintChain(expr, out capturedConstants);
if (fingerprintChain != null)
{
Hoisted <TIn, TOut> del = CachedExpressionCompiler.Compiler <TIn, TOut> ._fingerprintedCache.GetOrAdd(fingerprintChain, delegate(ExpressionFingerprintChain _)
{
Expression <Hoisted <TIn, TOut> > expression = HoistingExpressionVisitor <TIn, TOut> .Hoist(expr);
return(expression.Compile());
});
return((TIn model) => del(model, capturedConstants));
}
return(null);
}