Uniform handling of delimiters in talon

delimiters.py

from talon import Module, Context, actions

delimiters = {x[0]: x[1] for x in "() [] {} <> “”".split()}

mod = Module()
@mod.action_class
class Actions:
    def delimiter_close(delimiter: str) -> str:
        """Turns a delimiter into its corresponding closing delimiter."""
        return delimiters.get(delimiter, delimiter)

delimiters.talon

# Inserts a closing delimiter, e.g. "close paren" -> ")".
# Kind of redundant if you already have names for those.
# Symbols it doesn't recognize it will leave alone, e.g. "close quote" -> "'".
close <user.symbol>:
  key(user.delimiter_close(symbol))

# Insert a matched pair of delimiters, e.g.
#     empty paren   ->   ()
#     empty angle   ->   <>
#     empty quote   ->   ''
empty <user.symbol>:
  insert(symbol)
  insert(user.delimiter_close(symbol))

# The same thing, but leaves the cursor between the delimiters afterwards.
(in|between) <user.symbol>:
  insert(symbol)
  insert(user.delimiter_close(symbol))
  edit.left()