simon/mw-parser
1
0
Fork 0
Code Issues Pull requests Actions Packages Projects Releases Wiki Activity

State of play just before going back to Glasgow. Doesn't fully work yet, but close.

Browse source
This commit is contained in:
Simon Brooke 2016-01-03 14:59:24 +00:00
parent ac73639533
commit 717097070a
1 changed files with 29 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

35
src/mw_parser/declarative.clj
View file

@ -32,7 +32,7 @@
NEGATED-QUALIFIER := QUALIFIER SPACE NOT | NOT SPACE QUALIFIER;
COMPARATIVE-QUALIFIER := IS SPACE COMPARATIVE SPACE THAN;
QUALIFIER := COMPARATIVE-QUALIFIER | NEGATED-QUALIFIER | EQUIVALENCE | IS SPACE QUALIFIER;
QUANTIFIER := NUMBER | SOME | NONE | ALL;
QUANTIFIER := NUMBER | SOME | NONE | ALL | COMPARATIVE SPACE THAN SPACE NUMBER;
EQUIVALENCE := IS SPACE EQUAL | EQUAL | IS ;
COMPARATIVE := MORE | LESS;
DISJUNCT-VALUE := VALUE | VALUE SPACE OR SPACE DISJUNCT-VALUE;
@ -125,6 +125,14 @@
'upper (list 'max l1 l2)]
(list 'and (list '>= pv 'lower)(list '<= pv 'upper)))))
(defn generate-disjunct-condition
"Generate a property condition where the expression is a disjunct expression"
[tree property qualifier expression]
(let [e (list 'some (list 'fn ['i] '(= i value)) (list 'quote expression))]
(list 'let ['value (list property 'cell)]
(if (= qualifier '=) e
(list 'not e)))))
(defn generate-property-condition
([tree]
(assert-type tree :PROPERTY-CONDITION)
@ -135,10 +143,7 @@
qualifier (generate (nth tree 2))
expression (generate (nth tree 3))]
(case expression-type
:DISJUNCT-EXPRESSION (let [e (list 'some (list 'fn ['i] '(= i value)) (list 'quote expression))]
(list 'let ['value (list property 'cell)]
(if (= qualifier '=) e
(list 'not e))))
:DISJUNCT-EXPRESSION (generate-disjunct-condition tree property qualifier expression)
:RANGE-EXPRESSION (generate-ranged-property-condition tree property expression)
(list qualifier (list property 'cell) expression)))))
@ -173,6 +178,24 @@
:SYMBOL (list (keyword (second (second tree))) 'cell)
(generate (second tree))))
;; (defn generate-neighbours-condition
;; "Generate code for a condition which refers to neighbours."
;; ([tree]
;; (let [q (second tree)]
;; (if (number? q)
;; (generate-neighbours-condition '= q
;; ([comp1 quantity property value remainder comp2 distance]
;; [(list comp1
;; (list 'count
;; (list 'get-neighbours-with-property-value 'world
;; '(cell :x) '(cell :y) distance
;; (keyword property) (keyword-or-numeric value) comp2))
;; quantity)
;; remainder])
;; ([comp1 quantity property value remainder comp2]
;; (gen-neighbours-condition comp1 quantity property value remainder comp2 1)))
(defn generate
"Generate code for this (fragment of a) parse tree"
[tree]
@ -197,7 +220,7 @@
= 'not=
> '<
< '>)
;; :NEIGHBOURS-CONDITION (generate-neighbours-condition tree)
;; :NEIGHBOURS-CONDITION (generate-neighbours-condition tree)
:NUMERIC-EXPRESSION (generate-numeric-expression tree)
:NUMBER (read-string (second tree))
:PROPERTY (list (generate (second tree)) 'cell) ;; dubious - may not be right