1a6dfffc4a
Mirroring the Lex... triplet of functions, callers here can choose to parse in one of three modes: - ParseConfig is the main entry point and parses what we might consider a whole config file. - ParseExpression parses a sequence as an isolated expression, which may be useful in implementing a REPL to inspect configuration or application state. - ParseTemplate parses a sequence as an isolated template, which may be useful in parsing external files as templates, for situations where the input is too large to be conveniently embedded within configuration.