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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.
#nullable disable
using System;
using System.Collections.Immutable;
using System.Diagnostics;
using Microsoft.CodeAnalysis.CSharp.Symbols;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.PooledObjects;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.CSharp
{
/// <summary>
/// This binder owns the scope for an embedded statement.
/// </summary>
internal sealed class EmbeddedStatementBinder : LocalScopeBinder
{
private readonly StatementSyntax _statement;
public EmbeddedStatementBinder(Binder enclosing, StatementSyntax statement)
: base(enclosing, enclosing.Flags)
{
Debug.Assert(statement != null);
_statement = statement;
}
protected override ImmutableArray<LocalSymbol> BuildLocals()
{
ArrayBuilder<LocalSymbol> locals = ArrayBuilder<LocalSymbol>.GetInstance(DefaultLocalSymbolArrayCapacity);
BuildLocals(this, _statement, locals);
return locals.ToImmutableAndFree();
}
protected override ImmutableArray<LocalFunctionSymbol> BuildLocalFunctions()
{
ArrayBuilder<LocalFunctionSymbol> locals = null;
BuildLocalFunctions(_statement, ref locals);
return locals?.ToImmutableAndFree() ?? ImmutableArray<LocalFunctionSymbol>.Empty;
}
internal override bool IsLocalFunctionsScopeBinder
{
get
{
return true;
}
}
protected override ImmutableArray<LabelSymbol> BuildLabels()
{
ArrayBuilder<LabelSymbol> labels = null;
var containingMethod = (MethodSymbol)this.ContainingMemberOrLambda;
BuildLabels(containingMethod, _statement, ref labels);
return labels?.ToImmutableAndFree() ?? ImmutableArray<LabelSymbol>.Empty;
}
internal override bool IsLabelsScopeBinder
{
get
{
return true;
}
}
internal override ImmutableArray<LocalSymbol> GetDeclaredLocalsForScope(SyntaxNode scopeDesignator)
{
if (ScopeDesignator == scopeDesignator)
{
return this.Locals;
}
throw ExceptionUtilities.Unreachable();
}
internal override SyntaxNode ScopeDesignator
{
get
{
return _statement;
}
}
internal override ImmutableArray<LocalFunctionSymbol> GetDeclaredLocalFunctionsForScope(CSharpSyntaxNode scopeDesignator)
{
if (ScopeDesignator == scopeDesignator)
{
return this.LocalFunctions;
}
throw ExceptionUtilities.Unreachable();
}
}
}
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