What are the characters not allowed in Salesforce when creating trigger names?

Question

I am trying to create a trigger in Salesforce wit the name:

 trigger (uam) on Account (after update) {
 }

but get the error:Unexpected token '('

Is there a regex expression or a list of characters not allowed ?

Answer 1

From the Metadata API guide on ApexTrigger:

The name can only contain characters, letters, and the underscore (_) character, must start with a letter, and cannot end with an underscore or contain two consecutive underscore characters.