public override AstNode?VisitExplicitTag(ExplicitTagContext context)
{
if (_currentParameter == null)
{
_contracts.AddError(context, "Tags can be defined only inside parameters");
return(null);
}
if (!int.TryParse(context.tagNumber?.Text, out var tag))
{
_contracts.AddError(context, "Invalid tag value for parameter '{0}': {1}", _currentParameter.Name, context.tagNumber?.Text);
return(null);
}
if (!AstValidator.IsValidTag(tag))
{
_contracts.AddError(context, "Tag for parameter '{0}' is not within the valid range ({1})", _currentParameter.Name, context.tagNumber?.Text);
return(null);
}
if (_currentParameter.Tag != 0)
{
_contracts.AddError(context, "The parameter '{0}' already has an explicit tag ({1})", _currentParameter.Name, _currentParameter.Tag);
return(null);
}
_currentParameter.Tag = tag;
return(null);
}
private void ProcessProtoMemberAttribute(ParameterDefinition param)
{
var attr = param.Attributes.GetAttribute(KnownTypes.ProtoMemberAttribute);
if (attr == null)
{
return;
}
if (string.IsNullOrWhiteSpace(attr.Parameters))
{
_contracts.AddError(attr.ParseContext, "The [{0}] attribute must have parameters", KnownTypes.ProtoMemberAttribute);
return;
}
var match = Regex.Match(attr.Parameters, @"^\s*(?<nb>[0-9]+)\s*(?:,|$)");
if (!match.Success || !int.TryParse(match.Groups["nb"].Value, out var tagNb))
{
_contracts.AddError(attr.ParseContext, "Invalid [{0}] parameters", KnownTypes.ProtoMemberAttribute);
return;
}
if (param.Tag != 0)
{
_contracts.AddError(attr.ParseContext, "The parameter '{0}' already has an explicit tag ({1})", param.Name, param.Tag);
return;
}
if (!AstValidator.IsValidTag(tagNb))
{
_contracts.AddError(attr.ParseContext, "Tag for parameter '{0}' is not within the valid range ({1})", param.Name, tagNb);
return;
}
param.Tag = tagNb;
}