public override void ExitUnaryExpr(GoParser.UnaryExprContext context)
{
// unaryExpr
// : primaryExpr
// | ('+' | '-' | '!' | '^' | '*' | '&' | '<-') expression
if (PrimaryExpressions.TryGetValue(context.primaryExpr(), out string primaryExpression))
{
UnaryExpressions[context] = primaryExpression;
}
else if (context.expression() != null)
{
string unaryOP = context.children[0].GetText();
if (unaryOP.Equals("^", StringComparison.Ordinal))
{
unaryOP = "~";
}
else if (unaryOP.Equals("<-", StringComparison.Ordinal))
{
// TODO: Handle channel value access (update when channel class is created):
unaryOP = null;
UnaryExpressions[context] = $"{Expressions[context.expression()]}.Receive()";
}
else if (unaryOP.Equals("&", StringComparison.Ordinal))
{
// TODO: Handle pointer acquisition context - may need to augment pre-scan metadata for heap allocation notation
unaryOP = null;
UnaryExpressions[context] = $"ref {Expressions[context.expression()]}";
}
else if (unaryOP.Equals("*", StringComparison.Ordinal))
{
// TODO: Handle pointer dereference context - if this is a ref variable, Deref call is unnecessary
unaryOP = null;
UnaryExpressions[context] = $"{Expressions[context.expression()]}.Deref";
}
if ((object)unaryOP != null)
{
UnaryExpressions[context] = $"{unaryOP}{Expressions[context.expression()]}";
}
}
else if (!UnaryExpressions.ContainsKey(context))
{
AddWarning(context, $"Unexpected unary expression \"{context.GetText()}\"");
}
}
