public override void ExitExpression(GolangParser.ExpressionContext context)
{
// expression
// : unaryExpr
// | expression BINARY_OP expression
if (context.expression()?.Length == 2)
{
string leftOperand = Expressions[context.expression(0)];
string rightOperand = Expressions[context.expression(1)];
string binaryOP = context.children[1].GetText();
if (binaryOP.Equals("<<") || binaryOP.Equals(">>"))
{
// TODO: Need expression evaluations - no cast needed if expressions is int type
if (!int.TryParse(rightOperand, out int _))
rightOperand = $"(int)({rightOperand})";
}
binaryOP = binaryOP.Equals("&^") ? " & ~" : $" {binaryOP} ";
Expressions[context] = $"{leftOperand}{binaryOP}{rightOperand}";
}
else
{
if (UnaryExpressions.TryGetValue(context.unaryExpr(), out string unaryExpression))
Expressions[context] = unaryExpression;
else
AddWarning(context, $"Failed to find unary expression \"{context.unaryExpr().GetText()}\" in the expression \"{context.GetText()}\"");
}
}
public override Base VisitExpression([NotNull] GolangParser.ExpressionContext context)
{
if (context.unary_expr() != null)
{
return(context.unary_expr().Accept(this));
}
else
{
var newBe = new BinaryExpression(
(context.binary_op().Accept(this) as BinaryOpWrapper).Op,
context.expression(0).Accept(this) as Expression,
context.expression(1).Accept(this) as Expression);
return(FixPrecedence(newBe));
}
}
