private DeconstructionVariable BindDeconstructionDeclarationLocals(VariableComponentSyntax node, DiagnosticBag diagnostics)
{
switch (node.Kind())
{
case SyntaxKind.TypedVariableComponent:
{
var component = (TypedVariableComponentSyntax)node;
return(BindDeconstructionDeclarationLocals(component.Type, component.Designation, diagnostics));
}
case SyntaxKind.ParenthesizedVariableComponent:
{
var component = (ParenthesizedVariableComponentSyntax)node;
var builder = ArrayBuilder <DeconstructionVariable> .GetInstance(component.Variables.Count);
foreach (var n in component.Variables)
{
builder.Add(BindDeconstructionDeclarationLocals(n, diagnostics));
}
return(new DeconstructionVariable(builder, node));
}
default:
throw ExceptionUtilities.UnexpectedValue(node.Kind());
}
}
internal void CollectLocalsFromDeconstruction(
VariableComponentSyntax declaration,
LocalDeclarationKind kind,
ArrayBuilder <LocalSymbol> locals,
SyntaxNode deconstructionStatement,
Binder enclosingBinderOpt = null)
{
switch (declaration.Kind())
{
case SyntaxKind.ParenthesizedVariableComponent:
{
var component = (ParenthesizedVariableComponentSyntax)declaration;
foreach (var decl in component.Variables)
{
CollectLocalsFromDeconstruction(decl, kind, locals, deconstructionStatement, enclosingBinderOpt);
}
break;
}
case SyntaxKind.TypedVariableComponent:
{
var component = (TypedVariableComponentSyntax)declaration;
CollectLocalsFromDeconstruction(component.Designation, component.Type, kind, locals, deconstructionStatement, enclosingBinderOpt);
break;
}
default:
throw ExceptionUtilities.UnexpectedValue(declaration.Kind());
}
}
private void AddVariableExpressions(
VariableComponentSyntax component,
IList <string> expressions)
{
if (!_includeDeclarations)
{
return;
}
switch (component.Kind())
{
case SyntaxKind.ParenthesizedVariableComponent:
{
var t = (ParenthesizedVariableComponentSyntax)component;
foreach (var v in t.Variables)
{
AddVariableExpressions(component, expressions);
}
break;
}
case SyntaxKind.TypedVariableComponent:
{
var t = (TypedVariableComponentSyntax)component;
AddVariableExpressions(t.Designation, expressions);
break;
}
}
}
private DeconstructionVariable BindDeconstructionDeclarationLocals(VariableComponentSyntax node, DiagnosticBag diagnostics)
{
switch (node.Kind())
{
case SyntaxKind.TypedVariableComponent:
{
var component = (TypedVariableComponentSyntax)node;
return BindDeconstructionDeclarationLocals(component.Type, component.Designation, diagnostics);
}
case SyntaxKind.ParenthesizedVariableComponent:
{
var component = (ParenthesizedVariableComponentSyntax)node;
var builder = ArrayBuilder<DeconstructionVariable>.GetInstance(component.Variables.Count);
foreach (var n in component.Variables)
{
builder.Add(BindDeconstructionDeclarationLocals(n, diagnostics));
}
return new DeconstructionVariable(builder, node);
}
default:
throw ExceptionUtilities.UnexpectedValue(node.Kind());
}
}
internal BoundDeconstructionAssignmentOperator BindDeconstructionDeclaration(CSharpSyntaxNode node, VariableComponentSyntax declaration, ExpressionSyntax right, DiagnosticBag diagnostics, BoundDeconstructValuePlaceholder rightPlaceholder = null)
{
DeconstructionVariable locals = BindDeconstructionDeclarationLocals(declaration, diagnostics);
Debug.Assert(locals.HasNestedVariables);
var result = BindDeconstructionAssignment(node, right, locals.NestedVariables, diagnostics, isDeclaration: true, rhsPlaceholder: rightPlaceholder);
FreeDeconstructionVariables(locals.NestedVariables);
return result;
}
internal BoundDeconstructionAssignmentOperator BindDeconstructionDeclaration(CSharpSyntaxNode node, VariableComponentSyntax declaration, ExpressionSyntax right, DiagnosticBag diagnostics, BoundDeconstructValuePlaceholder rightPlaceholder = null)
{
DeconstructionVariable locals = BindDeconstructionDeclarationLocals(declaration, diagnostics);
Debug.Assert(locals.HasNestedVariables);
var result = BindDeconstructionAssignment(node, right, locals.NestedVariables, diagnostics, isDeclaration: true, rhsPlaceholder: rightPlaceholder);
FreeDeconstructionVariables(locals.NestedVariables);
return(result);
}
private void AddVariableExpressions(
VariableComponentSyntax component,
IList<string> expressions)
{
if (!_includeDeclarations) return;
switch (component.Kind())
{
case SyntaxKind.ParenthesizedVariableComponent:
{
var t = (ParenthesizedVariableComponentSyntax)component;
foreach (var v in t.Variables) AddVariableExpressions(component, expressions);
break;
}
case SyntaxKind.TypedVariableComponent:
{
var t = (TypedVariableComponentSyntax)component;
AddVariableExpressions(t.Designation, expressions);
break;
}
}
}
