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polynomialmani.pl
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Some progress in supporting floats 

Fixed some typos
This commit is contained in:
Diogo Cordeiro 2018-12-20 20:45:11 +00:00
parent 3af7f72aa4
commit d054989bc0
1 changed files with 26 additions and 11 deletions
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polymani.pl
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@ -261,7 +261,6 @@ do_process_input(store_multiplication(TN, PT, V)) :-
write(SP), write(SP),
nl. nl.
do_process_input(multiply(TN, PT)) :- do_process_input(multiply(TN, PT)) :-
%% To multiply, assume the left is a number
%% Flatten both %% Flatten both
polynomial_tree_to_polynomial(TN, N), polynomial_tree_to_polynomial(TN, N),
polynomial_tree_to_polynomial(PT, P), polynomial_tree_to_polynomial(PT, P),
@ -445,18 +444,30 @@ parse_number_explicit(_, T, T, [], []) :-
% %
% Parse a floating point number % Parse a floating point number
% %
parse_floating_number(N) -->
{
not(compound(N))
},
[N],
{
% Assert it must be between negative and positive infinity
% This uses the CLPR library, which makes this reversible,
% whereas `number(N)` is always false, since it only succeeds
% if the argument is bound (to a integer or float)
(N >= 0; N < 0)
}.
parse_floating_number(op('.', TL, TR)) --> parse_floating_number(op('.', TL, TR)) -->
%% A float is a node with a dot as the operator %% A float is a node with a dot as the operator
%% If there's a number on the left %% If there's a number on the left
parse_number(TL), parse_number(TL),
%% Followed by either point or dot %% Followed by either point or dot
[X], [RadixPoint],
{ member(X, [point, dot]), ! }, {
member(RadixPoint, [point, dot]),
!
},
%% Followed by another number %% Followed by another number
parse_positive_number(TR). parse_positive_number(TR).
parse_floating_number(TN) -->
%% Or just a number
parse_number(TN).
%% parse_positive_number(-tree, +stream, -not_consumed) is det %% parse_positive_number(-tree, +stream, -not_consumed) is det
% %
@ -464,8 +475,11 @@ parse_floating_number(TN) -->
% %
parse_positive_number(N) --> parse_positive_number(N) -->
[N], [N],
%% CLPFD, a number between 0 and infinity {
{ N in 0..sup, ! }. not(compound(N)),
%% CLPFD, a number between 0 and infinity
N in 0..sup, !
}.
parse_positive_number(T) --> parse_positive_number(T) -->
parse_number_explicit(void, void, T). parse_number_explicit(void, void, T).
@ -476,7 +490,7 @@ parse_positive_number(T) -->
parse_number(N) --> parse_number(N) -->
[N], [N],
%% CLPFD, a number between negative infinity and positive infinity %% CLPFD, a number between negative infinity and positive infinity
{ not(atom(N)), N in inf..sup, ! }. { N in inf..sup, ! }.
parse_number(op(neg, T)) --> % TODO parse_number(op(neg, T)) --> % TODO
%% A number can start with negative, to negate it %% A number can start with negative, to negate it
[negative], [negative],
@ -574,6 +588,7 @@ parse_polynomial_operand(load(T)) -->
%% Declare polynomial_store as a dynamic predicate with two arguments %% Declare polynomial_store as a dynamic predicate with two arguments
%% Used to store and retrieve polynomials associated with a variable %% Used to store and retrieve polynomials associated with a variable
%% First being the variable name and the second its content
:- dynamic polynomial_store/2. :- dynamic polynomial_store/2.
%% parse_stored_variable(-var) is det %% parse_stored_variable(-var) is det
@ -624,7 +639,7 @@ parse_polynomial_variable(B) -->
% Parse a polynomial. Delegates to explicit variant % Parse a polynomial. Delegates to explicit variant
% %
parse_polynomial(T) --> parse_polynomial(T) -->
%% Ignore "polynomail", if followed by a valid polynomial %% Ignore "polynomial", if followed by a valid polynomial
[polynomial], [polynomial],
{ ! }, { ! },
%% Delegate %% Delegate
@ -809,7 +824,7 @@ parse_command(op(+, TN, TP)) -->
%% parse_input(-tree) is det %% parse_input(-tree) is det
% %
% Parse each command and string it into a list % Parse each command and string into a list
% %
parse_input(command(TCL, TCR)) --> parse_input(command(TCL, TCR)) -->
%% Result is a struct with a command on the left %% Result is a struct with a command on the left