private static SyntaxNode RightAssignment(RParser.RightAssignmentContext assignment, Func <ParserRuleContext, Scope, SyntaxNode> transform, Scope scope)
{
var left = transform(assignment.expr()[1], scope) as ExpressionSyntax;
var right = transform(assignment.expr()[0], scope) as ExpressionSyntax;
Debug.Assert(left != null && right != null);
if (topLevel(assignment))
{
return(assigmentStatement(left, right, scope));
}
Debug.Assert(left is IdentifierNameSyntax);
var leftValue = left.ToString();
if (!scope.hasVariable(leftValue))
{
scope.PreStatements().Add(preVariable.Get <StatementSyntax>(left));
scope.addVariable(leftValue);
}
return(preAssignment.Get(left, right));
}
/// <summary>
/// Exit a parse tree produced by <see cref="RParser.RightAssignment"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitRightAssignment([NotNull] RParser.RightAssignmentContext context)
{
}
