Configuration not discovery

[sfkleach]

Story Statement

As a coder, I can give monogram a pre-defined set of tokenisation rules so that I can restrict the grammar that monogram accepts so it fails early and I can skip the : and ! markers.

Goals

Monogram takes an additional parameter which specifies a tokenisation-rules file e.g. myrules.mg-rules. The rules specify:

• Identifiers

  • Which identifiers may play the role of surround-forms.
  • Which identifiers may play the role of prefix-forms.
  • Which identifiers may play the role of labels.

• Operators

  • Which operators may play the role of infix-operators
  • Which operators may play the role of prefix-operators

• Delimiters

  • Which symbols may play the role of delimiters (brackets)
  • Which symbols may play the role of prefix function-call

• Strings

  • Which string quotes are allowed
  • Are string tags allowed?

• Dot

  • Is dot notation allowed?

• Markers

  • Is a ! prefix marker allowed?
  • Is a : label marker allowed?
  • Is a standalone : allowed?

• XML tags

  • Are XML tags allowed?

Acceptance Criteria

• Once a token is classified as definitely a prefix form or a label the associated marker syntax is redundant. Reflecting that it may be omitted. If the rules forbid the markers then : and ! will be interpreted as ordinary operators.