Werk College 11
The easiest way to make these exercises is to add your definitions to the Prolog Interperter
. If you make mistakes you can easily see where your parser and the input do have a mismatch
- Define a parser for a (possibly negative) integer number, which consists of an optional minus sign followed by a natural number.
- Let the parser for floating point numbers recognize an optional exponent.
- As another variation on the theme `repetition', define a =pSequence=combinator that transforms alist of parsers for some type into a parser yielding a list of elements of that type.
- Consider application of the parser
Many (pSym 'a') to the string
"aaa". In what order do the four possible parsings appear in the list of successes?
- When defining the priority of the
<|>=operator, using the =infixr keyword we also specified that the operator associates to the right. Why is this a better choice than association to the left?
- Can you write the function
pToken in terms of
- 19 Oct 2010