public override IAstNode VisitReadFieldStmt(MicroCParser.ReadFieldStmtContext context)
{
var label = ++_label;
string recName = context.name.Text;
string fieldName = context.field.Text;
var recSymbol = _symbolTable.LookupSymbol(recName);
if (recSymbol == null)
{
throw new ArgumentException($"Record: {recName} does not exist");
}
var fieldSymbol = recSymbol.Children.SingleOrDefault(f => f.Name == fieldName);
if (fieldSymbol == null)
{
throw new ArgumentException($"Record: {recName} does not include a field: {fieldName}");
}
var recIdent = new Identifier(recName, recSymbol.Type, recSymbol.Id);
var fieldIdent = new Identifier(fieldName, fieldSymbol.Type, fieldSymbol.Id);
RecordAccess sa = new RecordAccess(recIdent, fieldIdent);
var readStmt = new ReadStmt(sa);
readStmt.Label = label;
return(readStmt);
}
/// <summary>
/// Exit a parse tree produced by the <c>readFieldStmt</c>
/// labeled alternative in <see cref="MicroCParser.statement"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitReadFieldStmt([NotNull] MicroCParser.ReadFieldStmtContext context)
{
}
/// <summary>
/// Visit a parse tree produced by the <c>readFieldStmt</c>
/// labeled alternative in <see cref="MicroCParser.statement"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitReadFieldStmt([NotNull] MicroCParser.ReadFieldStmtContext context)
{
return(VisitChildren(context));
}
