private int GetContextStateIndex(int position)
{
// PositionComparer only checks the position, not the states
var searchContext = new NullableContextState(
position,
warningsState: NullableContextState.State.Unknown,
annotationsState: NullableContextState.State.Unknown
);
int index = _contexts.BinarySearch(searchContext, PositionComparer.Instance);
if (index < 0)
{
// If no exact match, BinarySearch returns the complement
// of the index of the next higher value.
index = ~index - 1;
}
Debug.Assert(index >= -1);
Debug.Assert(index < _contexts.Length);
#if DEBUG
if (index >= 0)
{
Debug.Assert(_contexts[index].Position <= position);
Debug.Assert(
index == _contexts.Length - 1 || position < _contexts[index + 1].Position
);
}
#endif
return(index);
}
internal bool AreNullableAnnotationsEnabled(SyntaxTree syntaxTree, int position)
{
Syntax.NullableContextState context = ((CSharpSyntaxTree)syntaxTree).GetNullableContextState(position);
return(context.AnnotationsState switch
{
Syntax.NullableContextState.State.Enabled => true,
Syntax.NullableContextState.State.Disabled => false,
Syntax.NullableContextState.State.ExplicitlyRestored => GetGlobalAnnotationState(),
Syntax.NullableContextState.State.Unknown => AreNullableAnnotationsGloballyEnabled(),
_ => throw ExceptionUtilities.UnexpectedValue(context.AnnotationsState)
});
internal bool AreNullableAnnotationsEnabled(SyntaxTree syntaxTree, int position)
{
CSharpSyntaxTree csTree = (CSharpSyntaxTree)syntaxTree;
Syntax.NullableContextState context = csTree.GetNullableContextState(position);
return(context.AnnotationsState switch
{
Syntax.NullableContextState.State.Enabled => true,
Syntax.NullableContextState.State.Disabled => false,
Syntax.NullableContextState.State.ExplicitlyRestored => GetGlobalAnnotationState(),
Syntax.NullableContextState.State.Unknown =>
!csTree.IsGeneratedCode(this.Compilation.Options.SyntaxTreeOptionsProvider, CancellationToken.None) &&
AreNullableAnnotationsGloballyEnabled(),
_ => throw ExceptionUtilities.UnexpectedValue(context.AnnotationsState)
});
internal NullableContextState GetContextState(int position)
{
// PositionComparer only checks the position, not the states
var searchContext = new NullableContextState(position, warningsState: NullableContextState.State.Unknown, annotationsState: NullableContextState.State.Unknown);
int index = _contexts.BinarySearch(searchContext, PositionComparer.Instance);
if (index < 0)
{
// If no exact match, BinarySearch returns the complement
// of the index of the next higher value.
index = ~index - 1;
}
var context = GetContextForFileStart(position, _isGeneratedCode);
if (index >= 0)
{
Debug.Assert(_contexts[index].Position <= position);
Debug.Assert(index == _contexts.Length - 1 || position < _contexts[index + 1].Position);
context = _contexts[index];
}
return(context);
}