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-rw-r--r--new-luxc/test/test/luxc/analyser/case.lux87
1 files changed, 68 insertions, 19 deletions
diff --git a/new-luxc/test/test/luxc/analyser/case.lux b/new-luxc/test/test/luxc/analyser/case.lux
index 98777b5d6..69ab4cd99 100644
--- a/new-luxc/test/test/luxc/analyser/case.lux
+++ b/new-luxc/test/test/luxc/analyser/case.lux
@@ -12,7 +12,7 @@
["S" set]))
["r" math/random "r/" Monad<Random>]
[type "Type/" Eq<Type>]
- (type ["TC" check])
+ (type ["tc" check])
[macro #+ Monad<Lux>]
(macro [code])
test)
@@ -40,24 +40,26 @@
head head+]
(wrap (#;Cons head tail+)))))
-(def: (total-branches-for variantTC inputC)
- (-> (List [Code Code]) Code (r;Random (List Code)))
+(def: (total-branches-for allow-literals? variantTC inputC)
+ (-> Bool (List [Code Code]) Code (r;Random (List Code)))
(case inputC
[_ (#;Bool _)]
(r/wrap (list (' true) (' false)))
(^template [<tag> <gen> <wrapper>]
[_ (<tag> _)]
- (do r;Monad<Random>
- [?sample (r;maybe <gen>)]
- (case ?sample
- (#;Some sample)
- (do @
- [else (total-branches-for variantTC inputC)]
- (wrap (list& (<wrapper> sample) else)))
+ (if allow-literals?
+ (do r;Monad<Random>
+ [?sample (r;maybe <gen>)]
+ (case ?sample
+ (#;Some sample)
+ (do @
+ [else (total-branches-for allow-literals? variantTC inputC)]
+ (wrap (list& (<wrapper> sample) else)))
- #;None
- (wrap (list (' _))))))
+ #;None
+ (wrap (list (' _)))))
+ (r/wrap (list (' _)))))
([#;Nat r;nat code;nat]
[#;Int r;int code;int]
[#;Deg r;deg code;deg]
@@ -72,7 +74,7 @@
[_ (#;Tuple members)]
(do r;Monad<Random>
- [member-wise-patterns (monad;map @ (total-branches-for variantTC) members)]
+ [member-wise-patterns (monad;map @ (total-branches-for allow-literals? variantTC) members)]
(wrap (|> member-wise-patterns
total-weaving
(L/map code;tuple))))
@@ -81,7 +83,7 @@
(do r;Monad<Random>
[#let [ks (L/map product;left kvs)
vs (L/map product;right kvs)]
- member-wise-patterns (monad;map @ (total-branches-for variantTC) vs)]
+ member-wise-patterns (monad;map @ (total-branches-for allow-literals? variantTC) vs)]
(wrap (|> member-wise-patterns
total-weaving
(L/map (|>. (list;zip2 ks) code;record)))))
@@ -91,7 +93,7 @@
[bundles (monad;map @
(function [[_tag _code]]
(do @
- [v-branches (total-branches-for variantTC _code)]
+ [v-branches (total-branches-for allow-literals? variantTC _code)]
(wrap (L/map (function [pattern] (` ((~ _tag) (~ pattern))))
v-branches))))
variantTC)]
@@ -119,8 +121,14 @@
(r/wrap (code;record (list;zip2 record-tags primitivesC)))
))))
+(def: (branch body pattern)
+ (-> Code Code [Code Code])
+ [pattern body])
+
(context: "Pattern-matching."
- #seed +9253409297339902486
+ ## #seed +9253409297339902486
+ ## #seed +3793366152923578600
+ #seed +5004137551292836565
[module-name (r;text +5)
variant-name (r;text +5)
record-name (|> (r;text +5) (r;filter (|>. (T/= variant-name) not)))
@@ -135,11 +143,26 @@
variantTC (list;zip2 variant-tags+ primitivesC)]
inputC (gen-input variant-tags+ record-tags+ primitivesC)
[outputT outputC] gen-primitive
- total-patterns (total-branches-for variantTC inputC)
- #let [total-branchesC (L/map (function [pattern] [pattern outputC])
+ [heterogeneousT heterogeneousC] (|> gen-primitive
+ (r;filter (|>. product;left (tc;checks? outputT) not)))
+ total-patterns (total-branches-for true variantTC inputC)
+ redundant-patterns (total-branches-for false variantTC inputC)
+ redundancy-idx (|> r;nat (:: @ map (n.% (list;size redundant-patterns))))
+ heterogeneous-idx (|> r;nat (:: @ map (n.% (list;size total-patterns))))
+ #let [total-branchesC (L/map (branch outputC)
total-patterns)
non-total-branchesC (list;take (n.dec (list;size total-branchesC))
- total-branchesC)]]
+ total-branchesC)
+ redundant-branchesC (<| (L/map (branch outputC))
+ list;concat
+ (list (list;take redundancy-idx redundant-patterns)
+ (list (assume (list;nth redundancy-idx redundant-patterns)))
+ (list;drop redundancy-idx redundant-patterns)))
+ heterogeneous-branchesC (list;concat (list (list;take heterogeneous-idx total-branchesC)
+ (list (let [[_pattern _body] (assume (list;nth heterogeneous-idx total-branchesC))]
+ [_pattern heterogeneousC]))
+ (list;drop (n.inc heterogeneous-idx) total-branchesC)))
+ ]]
($_ seq
(test "Will reject empty pattern-matching (no branches)."
(|> (&;with-scope
@@ -172,4 +195,30 @@
(&;with-expected-type outputT
(@;analyse-case analyse inputC non-total-branchesC)))))
check-failure))
+ (test "Will reject redundant pattern-matching."
+ (|> (@module;with-module +0 module-name
+ (do Monad<Lux>
+ [_ (@module;declare-tags variant-tags false
+ (#;Named [module-name variant-name]
+ (type;variant primitivesT)))
+ _ (@module;declare-tags record-tags false
+ (#;Named [module-name record-name]
+ (type;tuple primitivesT)))]
+ (&;with-scope
+ (&;with-expected-type outputT
+ (@;analyse-case analyse inputC redundant-branchesC)))))
+ check-failure))
+ (test "Will reject pattern-matching if the bodies of the branches do not all have the same type."
+ (|> (@module;with-module +0 module-name
+ (do Monad<Lux>
+ [_ (@module;declare-tags variant-tags false
+ (#;Named [module-name variant-name]
+ (type;variant primitivesT)))
+ _ (@module;declare-tags record-tags false
+ (#;Named [module-name record-name]
+ (type;tuple primitivesT)))]
+ (&;with-scope
+ (&;with-expected-type outputT
+ (@;analyse-case analyse inputC heterogeneous-branchesC)))))
+ check-failure))
))