par package:BNFC

Create a valid parser function name for a given category.

>>> parserName (Cat "Abcd")
pAbcd

>>> parserName (ListCat (Cat "Xyz"))
pListXyz

Entrypoint.

Main parsing function

Put parens around document if given condition is true.

>>> parensIf True "foo"
(foo)

>>> parensIf False "bar"
bar

Wrap in parentheses if condition holds.

ordinary rule (also for parser)

C (False) or C++ no STL (True) mode, with name to use as prefix.

C++ mode, with optional package name

Define an ordering on lists' rules with the following properties:

• rules with a higher coercion level should come first, i.e. the rules for [Foo3] are before rules for [Foo1] and they are both lower than rules for [Foo].
• [] < [_] < _:_

This is desiged to correctly order the rules in the prt function for lists so that the pattern matching works as expectd.

>>> compareRules (npRule "[]" (ListCat (CoercCat "Foo" 3)) [] Parsable) (npRule "[]" (ListCat (CoercCat "Foo" 1)) [] Parsable)
LT

>>> compareRules (npRule "[]" (ListCat (CoercCat "Foo" 3)) [] Parsable) (npRule "[]" (ListCat (Cat "Foo")) [] Parsable)
LT

>>> compareRules (npRule "[]" (ListCat (Cat "Foo")) [] Parsable) (npRule "(:[])" (ListCat (Cat "Foo")) [] Parsable)
LT

>>> compareRules (npRule "(:[])" (ListCat (Cat "Foo")) [] Parsable) (npRule "(:)" (ListCat (Cat "Foo")) [] Parsable)
LT