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-rw-r--r--prolog/problems/denotational_semantics/algol_3/common.py78
-rw-r--r--prolog/problems/denotational_semantics/algol_3/en.py32
2 files changed, 0 insertions, 110 deletions
diff --git a/prolog/problems/denotational_semantics/algol_3/common.py b/prolog/problems/denotational_semantics/algol_3/common.py
deleted file mode 100644
index 8138484..0000000
--- a/prolog/problems/denotational_semantics/algol_3/common.py
+++ /dev/null
@@ -1,78 +0,0 @@
-id = 176
-number = 83
-visible = False
-facts = None
-
-solution = '''\
-algol(fun(S0,S,apply176([printout=[]|S0],S,Minstructs))) -->
- [begin], instructs176(Minstructs), [end].
-
-instructs176(Minstr) --> instr176(Minstr).
-instructs176(fun(S0,S,
- (apply176(S0,S1,Minstr),
- apply176(S1,S,Minstructs))))
- -->
- instr176(Minstr), instructs176(Minstructs).
-
-instr176(Massign) --> assign176(Massign).
-instr176(fun(S0,[printout = L1|S1],
- (memb(X = V,S0),
- del(printout = L0,S0,S1),
- conc(L0,[V],L1))))
- -->
- [print(X)].
-instr176(fun(S0,S,
- loop176(S0,Mcond,Minstructs,S)))
- -->
- [while], cond176(Mcond), [do,begin], instructs176(Minstructs), [end].
-
-assign176(fun(S0,[X = Value|S1],
- (apply176(S0,Value,Mexpr),
- del(X = _,S0,S1))))
- -->
- var176(X), [:=], expr176(Mexpr).
-
-cond176( fun( S, TruthVal,
- (apply176(S,Val1,ME1),
- apply176(S,Val2,ME2),
- (Val1 < Val2,!,TruthVal = true ; TruthVal = false))))
- -->
- expr176(ME1), [<], expr176(ME2).
-
-var176(X) --> [X], {atom(X)}.
-
-expr176(fun(S,Value,eval(Expr,S,Value))) -->
- [Expr].
-
-apply176(In, Out, fun(In, Out, Goals)) :-
- call(Goals).
-
-loop176( State0, Mcond, _, State0) :-
- apply176( State0, false, Mcond), !.
-loop176( S0, Mcond, MBody, S) :-
- copy_term( MBody, MBodyCopy),
- apply176( S0, S1, MBody),
- loop176( S1, Mcond, MBodyCopy, S).
-
-eval176( N, _, N) :-
- number176( N), !.
-eval176( X, State, Val) :- % A program variable
- atom( X), !,
- memb( X = Val, State).
-eval176( E1 + E2, State, Val) :- !,
- eval176( E1, State, V1),
- eval176( E2, State, V2),
- Val is V1 + V2.
-eval176( E1 - E2, State, Val) :- !,
- eval176( E1, State, V1),
- eval176( E2, State, V2),
- Val is V1 - V2.
-eval176( E1 * E2, State, Val) :- !,
- eval176( E1, State, V1),
- eval176( E2, State, V2),
- Val is V1 * V2.
-eval176( E1 / E2, State, Val) :- !,
- eval176( E1, State, V1),
- eval176( E2, State, V2),
- Val is V1 / V2.
-'''
diff --git a/prolog/problems/denotational_semantics/algol_3/en.py b/prolog/problems/denotational_semantics/algol_3/en.py
deleted file mode 100644
index 3b91a47..0000000
--- a/prolog/problems/denotational_semantics/algol_3/en.py
+++ /dev/null
@@ -1,32 +0,0 @@
-name = 'algol/3'
-slug = 'interpreter for mini-algol'
-
-description = '''\
-<p>A DCG for mini-algol.</p>
-<pre>
-% apply a function to a starting state
-?- apply([a=2], Out, fun(_In, Out, eval(a+3, _In, Out))).
- Out = 5.
-
-% a := a+b
-% b := a-b
-% a := a-b
-?- _Program = [begin,a,:=,a+b,b,:=,a-b,a,:=,a-b,end],
- algol(_F, _Program, []),
- apply([a=3,b=5], Output, _F).
- Output = [a=5,b=3,printout=[]].
-
-% a := 0
-% while a < 10 do
-% begin
-% print(a)
-% a := a+1
-% end
-?- _Program = [begin,a,:=,0,while,a,<,10,do,begin,print(a),a,:=,a+1,end,end],
- algol(_F, _Program, []),
- apply([a=3], Output, _F).
- Output = [a=10,printout=[0,1,2,3,4,5,6,7,8,9]].
-</pre>
-'''
-
-hint = {}