private static bool WasFirstVariable(CSharp.Syntax.VariableDeclaratorSyntax variable)
{
var parent = GetOldParent(variable) as CSharp.Syntax.VariableDeclarationSyntax;
if (parent != null)
{
return(parent.Variables[0] == variable);
}
return(false);
}
private static bool CanReuseVariableDeclarator(CSharp.Syntax.VariableDeclaratorSyntax old, VariableFlags flags, bool isFirst)
{
if (old == null)
{
return(false);
}
SyntaxKind oldKind;
return((flags == GetOriginalVariableFlags(old)) &&
(isFirst == WasFirstVariable(old)) &&
old.RankSpecifiers.Count == 0 &&
old.Initializer == null && // can't reuse node that possibly ends in an expression
(oldKind = GetOldParent(old).Kind) != SyntaxKind.VariableDeclaration && // or in a method body
oldKind != SyntaxKind.LocalDeclarationStatement);
}
private static VariableFlags GetOriginalVariableFlags(CSharp.Syntax.VariableDeclaratorSyntax old)
{
var parent = GetOldParent(old);
var mods = GetOriginalModifiers(parent);
VariableFlags flags = default(VariableFlags);
if (mods.Any(SyntaxKind.FinalKeyword))
{
flags |= VariableFlags.Final;
}
if (parent != null && (parent.Kind == SyntaxKind.VariableDeclaration || parent.Kind == SyntaxKind.LocalDeclarationStatement))
{
flags |= VariableFlags.Local;
}
return(flags);
}
