internal static GreenNode?TryGetNode(
int kind,
GreenNode?child1,
GreenNode?child2,
GreenNode?child3,
GreenNode.NodeFlags flags,
out int hash
)
{
if (CanBeCached(child1, child2, child3))
{
GreenStats.ItemCacheable();
int h = hash = GetCacheHash(kind, flags, child1, child2, child3);
int idx = h & CacheMask;
var e = s_cache[idx];
if (
e.hash == h &&
e.node != null &&
e.node.IsCacheEquivalent(kind, flags, child1, child2, child3)
)
{
GreenStats.CacheHit();
return(e.node);
}
}
else
{
hash = -1;
}
return(null);
}
private static int GetCacheHash(
int kind,
GreenNode.NodeFlags flags,
GreenNode?child1,
GreenNode?child2,
GreenNode?child3
)
{
int code = (int)(flags) ^ kind;
if (child1 != null)
{
code = Hash.Combine(
System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode(child1),
code
);
}
if (child2 != null)
{
code = Hash.Combine(
System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode(child2),
code
);
}
if (child3 != null)
{
code = Hash.Combine(
System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode(child3),
code
);
}
// ensure nonnegative hash
return(code & Int32.MaxValue);
}
private static int GetCacheHash(int kind, GreenNode.NodeFlags flags, GreenNode child1)
{
int code = (int)(flags) ^ kind;
// the only child is never null
code = Hash.Combine(System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode(child1), code);
// ensure nonnegative hash
return(code & Int32.MaxValue);
}
private static int GetCacheHash(int kind, GreenNode.NodeFlags flags, GreenNode?child1)
{
int code = (int)flags ^ kind;
// the only child is never null
// https://github.com/dotnet/roslyn/issues/41539
code = Hash.Combine(System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode(child1 !), code);
// ensure nonnegative hash
return(code & int.MaxValue);
}
private static GreenNode.NodeFlags GetFlags(SyntaxFactoryContext context)
{
GreenNode.NodeFlags flags = GetFlags();
flags = CSharpSyntaxNode.SetFactoryContext(flags, context);
return(flags);
}
