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Implement higher-order functions.

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Estimated hours taken: 12

Implement higher-order functions.

Add higher-order function terms
(function lambda expressions, e.g. `Func = (func(X) = Y :- Y is 2 * X)'
and higher-order function calls (apply/N, e.g. `Z = apply(Func, 42)').
Add higher-order function insts and modes.

hlds_goal.m:
	Add a new field pred_or_func to lambda_goal.

prog_data.m:
	Add a new field pred_or_func to pred_inst_info.

prog_io.m:
	Add support for parsing higher-order function terms and
	higher-order function insts and modes.

make_hlds.m:
	Add support for parsing higher-order function terms.

typecheck.m:
	Add support for type-checking higher-order function calls
	and higher-order function terms.

modes.m, mode_errors.m:
	Add support for mode-checking higher-order function calls
	and higher-order function terms.

higher_order.m:
	Handle higher-order function types and insts.

hlds_pred.m:
	Add new predicate pred_args_to_func_args, for extracting the
	function arguments and function return from the arguments
	of a predicate that is really a function.

*.m:
	Minor changes to handle new pred_or_func field in lambda_goals
	and pred_inst_infos.
This commit is contained in:
Fergus Henderson
1996-05-14 10:07:46 +00:00
parent 6c13acd6a7
commit 60b9fa83b6
22 changed files with 542 additions and 196 deletions
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12
compiler/prog_data.m
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@@ -210,10 +210,18 @@
:- type pred_inst_info
---> pred_inst_info(
pred_or_func, % is this a higher-order func
% mode or a higher-order pred
% mode?
list(mode), % the modes of the additional
% (i.e. not-yet-supplied)
% arguments of the pred
determinism % the determinism of the pred
% arguments of the pred;
% for a function, this includes
% the mode of the return value
% as the last element of the
% list.
determinism % the determinism of the
% predicate or function
).
:- type bound_inst ---> functor(cons_id, list(inst)).