Prolog Syntax Error Postfix/infix Operator Expected
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FAQ about? 1.2. What is the ECLiPSe Constraint Logic Programming System? 1.3. Is that the Eclipse development environment originated from IBM? 1.4. Who is this FAQ for? 1.5. Who contributed to this FAQ? 1.6. Why haven't you answered...? 2. License 2.1. What is the license for ECLiPSe? 2.2. Can syntax error operator expected swi-prolog I get hold of older versions of ECLiPSe, before the open-sourcing? 3. ECLiPSe 3.1. Where can syntax error operator expected ocaml I obtain ECLiPSe? 3.2. What platforms does ECLiPSe run on? 3.3. Where can I find documentation? 3.4. Where can I find sample code? 3.5. How
Arguments Are Not Sufficiently Instantiated
do I write an ECLiPSe program? 3.6. Is there an IDE for ECLiPSe? 3.7. Does ECLiPSe run standard Prolog code? 3.8. What does this predicate do? 3.9. Where can I find an alphabetical list of predicates? 3.10. I'm still stuck.
Singleton Variables Prolog
Where can I find more help? 3.11. I've found a bug in ECLiPSe! 3.12. How do I deliver an ECLiPSe application as an executable? 4. tkeclipse 4.1. What's the difference between eclipse and tkeclipse? 4.2. Can I use tkeclipse with my embedded ECLiPSe applications? 4.3. Why won't tkeclipse run? 4.4. I changed my program but ECLiPSe hasn't noticed! 4.5. How do I clear the output windows? 4.6. How do I copy text from the output windows to the clipboard? 4.7. Why is prolog not operator tkeclipse not responding? 4.8. How do I get help in tkeclipse? 5. General programming 5.1. How do I structure an ECLiPSe program? 5.2. What is the difference between =, ==, =:= and #=? 5.3. How do I convert a real number (e.g. 1.0) to an integer (1) format? 5.4. How do I improve the performance of my program? 5.5. How do I invoke an ECLiPSe goal from the command line? 6. Loops and conditionals 6.1. What are logical loops? 6.2. Where do I put the brackets in a loop? 6.3. How does param work? 6.4. Why is my for loop failing? 6.5. How do I trace a loop statement? 6.6. Where do I put the brackets in a conditional statement? 6.7. Why is my conditional statement failing? 6.8. What can I put in the condition? 6.9. When should I use ;? 7. Constraints 7.1. How do I remove a posted constraint? 8. Search 8.1. Why do I need search? 8.2. What search facilities does ECLiPSe have? 8.3. How do I write my own search predicate? 8.4. What is a backtrack? 8.5. How do I count backtracks? 8.6. What does "search did not instantiate cost variable" mean? 9. Output 9.1. How do I see more of terms I print? How do I see more in the Tracer? 9.2. Why isn't my output being printed? 9.3. How do write and printf differ in buffering? 10. Error messages 10.1. I'm getting a strange error message when compi
of a correct Prolog term. [eclipse 3]: a https://www.ics.uci.edu/~dechter/courses/ics-275a/fall-99/slides/node44.html b
10. saturate([], []). % too big saturate([H|T], [X|Y]) :- H>10, X is 10, saturate(T,Y). % too small saturate([H|T], [X|Y]) :- H< -10, X is -10, saturate(T,Y). % everything else syntax error saturate([H|T], [X|Y]) :- X is H, saturate(T,Y). ... Perhaps surprisingly, hitting ; here will find more copies of your solution, as prolog does the matches in a different order: the number of repetitions is is 2N, where N syntax error operator is the number of elements > 10 or < 10. This is a job for... a (green) CUT!!. Yes, rule order matters. For instance, the base case has to be at the top, as usual. More interestingly, if the last rule is moved up to be the second rule, the first answer generated is that the list is just copied with no changes since it's a default-copy rule and will be used first, before the non-default cases that need attention. Originally, it's the last resort after rules 1,2,3 fail. If it's moved to 2nd place, hitting ; generates 2N solutions, not all the same (!!) as backtracking selects different rules.
can occur only in a compiled file. Module must be an existing, non-locked module. All following code will be added to the module Module up to the next begin_module/1 or module_interface/1 directive or up to the file end. Fail Conditions None. Resatisfiable No. Exceptions (4) instantiation fault Module is not instantiated. (5) type error Module is not an atom. (68) calling an undefined procedure When called from Prolog. (80) not a module Module is not a module. (82) trying to access a locked module Module is locked. Examples Success: [eclipse 2]: [user]. :- module_interface(m). :- op(700, xf, there). :- export p/1. :- begin_module(m). p(X) :- writeln(X). user compiled 56 bytes in 0.03 seconds yes. [eclipse 3]: p(hello there). syntax error: postfix/infix operator expected | p(hello there). | ^ here [eclipse 3]: use_module(m). yes. [eclipse 4]: p(hello there). hello there yes. Error: begin_module(M). (Error 4). begin_module(1). (Error 5). begin_module(a_locked_module). (Error 82). See Also module / 1, create_module / 1, erase_module / 1, current_module / 1, module_interface / 1