protected override bool Init(GenerationEnvironment env)
{
env.errorContext.ClearFlag();
if (!(base.Init(env)))
{
return(false);
}
symbol.TryGetAttribute(RelevantSymbols.AutoActivationAttribute, out var autoActivation);
var exportedChains = GetExportedChains(env);
if (autoActivation is null)
{
Chains = exportedChains.ToArray();
if (Chains.Length == 0)
{
env.ReportError("Behaviors must define at least a chain. Otherwise, they are just components");
}
}
else
{
if (exportedChains.Any())
{
env.ReportError($"Behaviors decorated with AutoActivation cannot define additional chains.");
}
else
{
if (!TryInitActivationContext(env, out var context))
{
return(false);
}
Chains = new IChainWrapper[] {
new BehaviorActivationChainWrapper("Check", symbol, context),
new BehaviorActivationChainWrapper("Do", symbol, context)
};
foreach (var chain in Chains)
{
env.TryAddChain(chain);
}
ActivationAlias = autoActivation.Alias;
if (env.aliases.Contains(ActivationAlias))
{
env.ReportError($"Duplicate alias name {ActivationAlias} in behavior {symbol.Name}.");
}
}
}
return(!env.errorContext.Flag);
}
private IEnumerable <ChainSymbolWrapper> GetExportedChains(GenerationEnvironment env)
{
foreach (var field in symbol.GetInstanceFields())
{
if (field.TryGetAttribute(RelevantSymbols.ChainAttribute, out var chainAttribute))
{
var wrapped = new ChainSymbolWrapper(field, chainAttribute);
if (wrapped.Init(env) && env.TryAddChain(wrapped))
{
yield return(wrapped);
}
}
}
}
