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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections.Immutable;
using System.Diagnostics;
using Microsoft.CodeAnalysis.CSharp.Symbols;
namespace Microsoft.CodeAnalysis.CSharp
{
internal readonly struct InterpolatedStringHandlerData
{
public readonly TypeSymbol? BuilderType;
public readonly BoundExpression Construction;
public readonly bool UsesBoolReturns;
/// <summary>
/// The placeholders that are used for <see cref="Construction"/>.
/// </summary>
public readonly ImmutableArray<BoundInterpolatedStringArgumentPlaceholder> ArgumentPlaceholders;
public readonly ImmutableArray<ImmutableArray<(bool IsLiteral, bool HasAlignment, bool HasFormat)>> PositionInfo;
public bool HasTrailingHandlerValidityParameter => ArgumentPlaceholders.Length > 0 && ArgumentPlaceholders[^1].ArgumentIndex == BoundInterpolatedStringArgumentPlaceholder.TrailingConstructorValidityParameter;
public readonly BoundInterpolatedStringHandlerPlaceholder? ReceiverPlaceholder;
public bool IsDefault => Construction is null;
public InterpolatedStringHandlerData(
TypeSymbol builderType,
BoundExpression construction,
bool usesBoolReturns,
ImmutableArray<BoundInterpolatedStringArgumentPlaceholder> placeholders,
ImmutableArray<ImmutableArray<(bool IsLiteral, bool HasAlignment, bool HasFormat)>> positionInfo,
BoundInterpolatedStringHandlerPlaceholder receiverPlaceholder)
{
Debug.Assert(construction is BoundObjectCreationExpression or BoundDynamicObjectCreationExpression or BoundBadExpression);
Debug.Assert(!placeholders.IsDefault);
// Only the last placeholder may be the out parameter.
Debug.Assert(placeholders.IsEmpty || placeholders.AsSpan()[..^1].All(item => item.ArgumentIndex != BoundInterpolatedStringArgumentPlaceholder.TrailingConstructorValidityParameter));
Debug.Assert(!positionInfo.IsDefault);
BuilderType = builderType;
Construction = construction;
UsesBoolReturns = usesBoolReturns;
ArgumentPlaceholders = placeholders;
PositionInfo = positionInfo;
ReceiverPlaceholder = receiverPlaceholder;
}
public InterpolatedStringHandlerData(BoundExpression construction)
{
BuilderType = null;
Construction = construction;
UsesBoolReturns = false;
ArgumentPlaceholders = default;
PositionInfo = default;
ReceiverPlaceholder = null;
}
}
}
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