- Simplified the macros for asking about or ensuring AST tokens.

8 files changed, 103 insertions, 102 deletions

diff --git a/stdlib/source/lux/concurrency/actor.lux b/stdlib/source/lux/concurrency/actor.lux
index 650065a0e..e55386d9d 100644
--- a/stdlib/source/lux/concurrency/actor.lux
+++ b/stdlib/source/lux/concurrency/actor.lux
@@ -133,7 +133,7 @@
                                                           (wrap (#;Right new-server))))
                                                       ))))
                                         #end (lambda [_ server] (exec (io;run (poison server))
-                                                             (:: Monad<Promise> wrap [])))})))]
+                                                                  (:: Monad<Promise> wrap [])))})))]
         (update@ #obituary (: (-> (P;Promise [(Maybe Text) (Actor ($ +0) ($ +1)) (List ($ +1))])
                                   (P;Promise [(Maybe Text) ($ +0) (List ($ +1))]))
                               (lambda [process]
@@ -154,7 +154,7 @@
 (def: method^
   (Syntax Method)
   (s;form (do s;Monad<Syntax>
-            [_ (s;symbol! ["" "method:"])
+            [_ (s;sample! (' method:))
              vars (s;default (list) (s;tuple (s;some s;local-symbol)))
              [name args] (s;form ($_ s;seq
                                      s;local-symbol
@@ -171,7 +171,7 @@
 (def: stop^
   (Syntax AST)
   (s;form (do s;Monad<Syntax>
-            [_ (s;symbol! ["" "stop:"])]
+            [_ (s;sample! (' stop:))]
             s;any)))
 
 (def: actor-decl^
diff --git a/stdlib/source/lux/control/effect.lux b/stdlib/source/lux/control/effect.lux
index bf98b9391..2b81ad543 100644
--- a/stdlib/source/lux/control/effect.lux
+++ b/stdlib/source/lux/control/effect.lux
@@ -217,7 +217,7 @@
 (def: translation^
   (Syntax Translation)
   (s;form (do s;Monad<Syntax>
-            [_ (s;symbol! ["" "=>"])]
+            [_ (s;sample! (' =>))]
             (s;seq s;symbol
                    (s;tuple (s;seq s;any
                                    s;any))))))
diff --git a/stdlib/source/lux/host.lux b/stdlib/source/lux/host.lux
index 7c0180ec1..ededaa0a4 100644
--- a/stdlib/source/lux/host.lux
+++ b/stdlib/source/lux/host.lux
@@ -561,14 +561,14 @@
   (-> Text Text (Syntax AST))
   (do s;Monad<Syntax>
     [#let [dotted-name (format "." field-name)]
-     _ (s;symbol! ["" dotted-name])]
+     _ (s;sample! (ast;symbol ["" dotted-name]))]
     (wrap (`' (_lux_proc ["jvm" (~ (ast;text (format "getstatic" ":" class-name ":" field-name)))] [])))))
 
 (def: (make-get-var-parser class-name field-name)
   (-> Text Text (Syntax AST))
   (do s;Monad<Syntax>
     [#let [dotted-name (format "." field-name)]
-     _ (s;symbol! ["" dotted-name])]
+     _ (s;sample! (ast;symbol ["" dotted-name]))]
     (wrap (`' (_lux_proc ["jvm" (~ (ast;text (format "getfield" ":" class-name ":" field-name)))] [_jvm_this])))))
 
 (def: (make-put-var-parser class-name field-name)
@@ -576,7 +576,7 @@
   (do s;Monad<Syntax>
     [#let [dotted-name (format "." field-name)]
      [_ _ value] (: (Syntax [Unit Unit AST])
-                    (s;form ($_ s;seq (s;symbol! ["" ":="]) (s;symbol! ["" dotted-name]) s;any)))]
+                    (s;form ($_ s;seq (s;sample! (' :=)) (s;sample! (ast;symbol ["" dotted-name])) s;any)))]
     (wrap (`' (_lux_proc ["jvm" (~ (ast;text (format "putfield" ":" class-name ":" field-name)))] [_jvm_this (~ value)])))))
 
 (def: (pre-walk-replace f input)
@@ -621,7 +621,7 @@
   (-> (List TypeParam) Text (List ArgDecl) (Syntax AST))
   (do s;Monad<Syntax>
     [[_ args] (: (Syntax [Unit (List AST)])
-                 (s;form ($_ s;seq (s;symbol! ["" ".new!"]) (s;tuple (s;exactly (list;size arg-decls) s;any)))))
+                 (s;form ($_ s;seq (s;sample! (' .new!)) (s;tuple (s;exactly (list;size arg-decls) s;any)))))
      #let [arg-decls' (: (List Text) (map (. (simple-class$ params) product;right) arg-decls))]]
     (wrap (` (;_lux_proc ["jvm" (~ (ast;text (format "new" ":" class-name ":" (text;join-with "," arg-decls'))))]
                          [(~@ args)])))))
@@ -631,7 +631,7 @@
   (do s;Monad<Syntax>
     [#let [dotted-name (format "." method-name "!")]
      [_ args] (: (Syntax [Unit (List AST)])
-                 (s;form ($_ s;seq (s;symbol! ["" dotted-name]) (s;tuple (s;exactly (list;size arg-decls) s;any)))))
+                 (s;form ($_ s;seq (s;sample! (ast;symbol ["" dotted-name])) (s;tuple (s;exactly (list;size arg-decls) s;any)))))
      #let [arg-decls' (: (List Text) (map (. (simple-class$ params) product;right) arg-decls))]]
     (wrap (`' (;_lux_proc ["jvm" (~ (ast;text (format "invokestatic" ":" class-name ":" method-name ":" (text;join-with "," arg-decls'))))]
                           [(~@ args)])))))
@@ -642,7 +642,7 @@
      (do s;Monad<Syntax>
        [#let [dotted-name (format "." method-name "!")]
         [_ args] (: (Syntax [Unit (List AST)])
-                    (s;form ($_ s;seq (s;symbol! ["" dotted-name]) (s;tuple (s;exactly (list;size arg-decls) s;any)))))
+                    (s;form ($_ s;seq (s;sample! (ast;symbol ["" dotted-name])) (s;tuple (s;exactly (list;size arg-decls) s;any)))))
         #let [arg-decls' (: (List Text) (map (. (simple-class$ params) product;right) arg-decls))]]
        (wrap (`' (;_lux_proc ["jvm" (~ (ast;text (format <jvm-op> ":" class-name ":" method-name ":" (text;join-with "," arg-decls'))))]
                              [(~' _jvm_this) (~@ args)])))))]
@@ -680,32 +680,32 @@
   (Syntax PrivacyModifier)
   (let [(^open) s;Monad<Syntax>]
     ($_ s;alt
-        (s;tag! ["" "public"])
-        (s;tag! ["" "private"])
-        (s;tag! ["" "protected"])
+        (s;sample! (' #public))
+        (s;sample! (' #private))
+        (s;sample! (' #protected))
         (wrap []))))
 
 (def: inheritance-modifier^
   (Syntax InheritanceModifier)
   (let [(^open) s;Monad<Syntax>]
     ($_ s;alt
-        (s;tag! ["" "final"])
-        (s;tag! ["" "abstract"])
+        (s;sample! (' #final))
+        (s;sample! (' #abstract))
         (wrap []))))
 
 (def: bound-kind^
   (Syntax BoundKind)
-  (s;alt (s;symbol! ["" "<"])
-         (s;symbol! ["" ">"])))
+  (s;alt (s;sample! (' <))
+         (s;sample! (' >))))
 
 (def: (generic-type^ imports type-vars)
   (-> ClassImports (List TypeParam) (Syntax GenericType))
   ($_ s;either
       (do s;Monad<Syntax>
-        [_ (s;symbol! ["" "?"])]
+        [_ (s;sample! (' ?))]
         (wrap (#GenericWildcard #;None)))
       (s;tuple (do s;Monad<Syntax>
-                 [_ (s;symbol! ["" "?"])
+                 [_ (s;sample! (' ?))
                   bound-kind bound-kind^
                   bound (generic-type^ imports type-vars)]
                  (wrap (#GenericWildcard (#;Some [bound-kind bound])))))
@@ -731,7 +731,7 @@
                 ## else
                 (wrap (#GenericClass name (list))))))
       (s;form (do s;Monad<Syntax>
-                [name (s;symbol! ["" "Array"])
+                [name (s;sample! (' Array))
                  component (generic-type^ imports type-vars)]
                 (case component
                   (^template [<class> <name>]
@@ -763,7 +763,7 @@
               (wrap [param-name (list)]))
             (s;tuple (do s;Monad<Syntax>
                        [param-name s;local-symbol
-                        _ (s;symbol! ["" "<"])
+                        _ (s;sample! (' <))
                         bounds (s;many (generic-type^ imports (list)))]
                        (wrap [param-name bounds])))))
 
@@ -807,7 +807,7 @@
 (def: (annotations^' imports)
   (-> ClassImports (Syntax (List Annotation)))
   (do s;Monad<Syntax>
-    [_ (s;tag! ["" "ann"])]
+    [_ (s;sample! (' #ann))]
     (s;tuple (s;some (annotation^ imports)))))
 
 (def: (annotations^ imports)
@@ -819,7 +819,7 @@
 (def: (throws-decl'^ imports type-vars)
   (-> ClassImports (List TypeParam) (Syntax (List GenericType)))
   (do s;Monad<Syntax>
-    [_ (s;tag! ["" "throws"])]
+    [_ (s;sample! (' #throws))]
     (s;tuple (s;some (generic-type^ imports type-vars)))))
 
 (def: (throws-decl^ imports type-vars)
@@ -845,14 +845,14 @@
 (def: state-modifier^
   (Syntax StateModifier)
   ($_ s;alt
-      (s;tag! ["" "volatile"])
-      (s;tag! ["" "final"])
+      (s;sample! (' #volatile))
+      (s;sample! (' #final))
       (:: s;Monad<Syntax> wrap [])))
 
 (def: (field-decl^ imports type-vars)
   (-> ClassImports (List TypeParam) (Syntax [MemberDecl FieldDecl]))
   (s;either (s;form (do s;Monad<Syntax>
-                      [_ (s;tag! ["" "const"])
+                      [_ (s;sample! (' #const))
                        name s;local-symbol
                        anns (annotations^ imports)
                        type (generic-type^ imports type-vars)
@@ -887,10 +887,10 @@
   (-> ClassImports (List TypeParam) (Syntax [MemberDecl MethodDef]))
   (s;form (do s;Monad<Syntax>
             [pm privacy-modifier^
-             strict-fp? (s;tag? ["" "strict"])
+             strict-fp? (s;sample? (' #strict))
              method-vars (s;default (list) (type-params^ imports))
              #let [total-vars (List/append class-vars method-vars)]
-             [_ arg-decls] (s;form (s;seq (s;symbol! ["" "new"])
+             [_ arg-decls] (s;form (s;seq (s;sample! (' new))
                                           (arg-decls^ imports total-vars)))
              constructor-args (constructor-args^ imports total-vars)
              exs (throws-decl^ imports total-vars)
@@ -905,8 +905,8 @@
   (-> ClassImports (List TypeParam) (Syntax [MemberDecl MethodDef]))
   (s;form (do s;Monad<Syntax>
             [pm privacy-modifier^
-             strict-fp? (s;tag? ["" "strict"])
-             final? (s;tag? ["" "final"])
+             strict-fp? (s;sample? (' #strict))
+             final? (s;sample? (' #final))
              method-vars (s;default (list) (type-params^ imports))
              #let [total-vars (List/append class-vars method-vars)]
              [name arg-decls] (s;form (s;seq s;local-symbol
@@ -923,7 +923,7 @@
 (def: (overriden-method-def^ imports)
   (-> ClassImports (Syntax [MemberDecl MethodDef]))
   (s;form (do s;Monad<Syntax>
-            [strict-fp? (s;tag? ["" "strict"])
+            [strict-fp? (s;sample? (' #strict))
              owner-class (class-decl^ imports)
              method-vars (s;default (list) (type-params^ imports))
              #let [total-vars (List/append (product;right owner-class) method-vars)]
@@ -942,8 +942,8 @@
   (-> ClassImports (Syntax [MemberDecl MethodDef]))
   (s;form (do s;Monad<Syntax>
             [pm privacy-modifier^
-             strict-fp? (s;tag? ["" "strict"])
-             _ (s;tag! ["" "static"])
+             strict-fp? (s;sample? (' #strict))
+             _ (s;sample! (' #static))
              method-vars (s;default (list) (type-params^ imports))
              #let [total-vars method-vars]
              [name arg-decls] (s;form (s;seq s;local-symbol
@@ -961,7 +961,7 @@
   (-> ClassImports (Syntax [MemberDecl MethodDef]))
   (s;form (do s;Monad<Syntax>
             [pm privacy-modifier^
-             _ (s;tag! ["" "abstract"])
+             _ (s;sample! (' #abstract))
              method-vars (s;default (list) (type-params^ imports))
              #let [total-vars method-vars]
              [name arg-decls] (s;form (s;seq s;local-symbol
@@ -978,7 +978,7 @@
   (-> ClassImports (Syntax [MemberDecl MethodDef]))
   (s;form (do s;Monad<Syntax>
             [pm privacy-modifier^
-             _ (s;tag! ["" "native"])
+             _ (s;sample! (' #native))
              method-vars (s;default (list) (type-params^ imports))
              #let [total-vars method-vars]
              [name arg-decls] (s;form (s;seq s;local-symbol
@@ -1008,42 +1008,42 @@
 (def: class-kind^
   (Syntax ClassKind)
   (s;either (do s;Monad<Syntax>
-              [_ (s;tag! ["" "class"])]
+              [_ (s;sample! (' #class))]
               (wrap #Class))
             (do s;Monad<Syntax>
-              [_ (s;tag! ["" "interface"])]
+              [_ (s;sample! (' #interface))]
               (wrap #Interface))
             ))
 
 (def: import-member-alias^
   (Syntax (Maybe Text))
   (s;opt (do s;Monad<Syntax>
-           [_ (s;tag! ["" "as"])]
+           [_ (s;sample! (' #as))]
            s;local-symbol)))
 
 (def: (import-member-args^ imports type-vars)
   (-> ClassImports (List TypeParam) (Syntax (List [Bool GenericType])))
-  (s;tuple (s;some (s;seq (s;tag? ["" "?"]) (generic-type^ imports type-vars)))))
+  (s;tuple (s;some (s;seq (s;sample? (' #?)) (generic-type^ imports type-vars)))))
 
 (def: import-member-return-flags^
   (Syntax [Bool Bool Bool])
-  ($_ s;seq (s;tag? ["" "io"]) (s;tag? ["" "try"]) (s;tag? ["" "?"])))
+  ($_ s;seq (s;sample? (' #io)) (s;sample? (' #try)) (s;sample? (' #?))))
 
 (def: primitive-mode^
   (Syntax Primitive-Mode)
-  (s;alt (s;tag! ["" "manual"])
-         (s;tag! ["" "auto"])))
+  (s;alt (s;sample! (' #manual))
+         (s;sample! (' #auto))))
 
 (def: (import-member-decl^ imports owner-vars)
   (-> ClassImports (List TypeParam) (Syntax ImportMemberDecl))
   ($_ s;either
       (s;form (do s;Monad<Syntax>
-                [_ (s;tag! ["" "enum"])
+                [_ (s;sample! (' #enum))
                  enum-members (s;some s;local-symbol)]
                 (wrap (#EnumDecl enum-members))))
       (s;form (do s;Monad<Syntax>
                 [tvars (s;default (list) (type-params^ imports))
-                 _ (s;symbol! ["" "new"])
+                 _ (s;sample! (' new))
                  ?alias import-member-alias^
                  #let [total-vars (List/append owner-vars tvars)]
                  ?prim-mode (s;opt primitive-mode^)
@@ -1061,7 +1061,7 @@
                 ))
       (s;form (do s;Monad<Syntax>
                 [kind (: (Syntax ImportMethodKind)
-                         (s;alt (s;tag! ["" "static"])
+                         (s;alt (s;sample! (' #static))
                                 (wrap [])))
                  tvars (s;default (list) (type-params^ imports))
                  name s;local-symbol
@@ -1083,12 +1083,12 @@
                                      #import-method-return  return
                                      }]))))
       (s;form (do s;Monad<Syntax>
-                [static? (s;tag? ["" "static"])
+                [static? (s;sample? (' #static))
                  name s;local-symbol
                  ?prim-mode (s;opt primitive-mode^)
                  gtype (generic-type^ imports owner-vars)
-                 maybe? (s;tag? ["" "?"])
-                 setter? (s;tag? ["" "!"])]
+                 maybe? (s;sample? (' #?))
+                 setter? (s;sample? (' #!))]
                 (wrap (#FieldAccessDecl {#import-field-mode    (default #AutoPrM ?prim-mode)
                                          #import-field-name    name
                                          #import-field-static? static?
@@ -1251,7 +1251,7 @@
     
     (#OverridenMethod strict-fp? class-decl type-vars arg-decls return-type body exs)
     (let [super-replacer (parser->replacer (s;form (do s;Monad<Syntax>
-                                                     [_ (s;symbol! ["" ".super!"])
+                                                     [_ (s;sample! (' .super!))
                                                       args (s;tuple (s;exactly (list;size arg-decls) s;any))
                                                       #let [arg-decls' (: (List Text) (map (. (simple-class$ (list)) product;right)
                                                                                            arg-decls))]]
@@ -1944,7 +1944,7 @@
     (compiler;fail (format "Unknown class: " class-name))))
 
 (syntax: #export (jvm-import [#let [imports (class-imports *compiler*)]]
-                   [long-name? (s;tag? ["" "long"])]
+                   [long-name? (s;sample? (' #long))]
                    [class-decl (class-decl^ imports)]
                    [#let [full-class-name (product;left class-decl)
                           imports (add-import [(short-class-name full-class-name) full-class-name]
diff --git a/stdlib/source/lux/macro.lux b/stdlib/source/lux/macro.lux
index f9cfce416..b06deedb7 100644
--- a/stdlib/source/lux/macro.lux
+++ b/stdlib/source/lux/macro.lux
@@ -13,7 +13,7 @@
 
 (def: omit^
   (Syntax Bool)
-  (s;tag? ["" "omit"]))
+  (s;sample? (' #omit)))
 
 (do-template [<macro> <func>]
   [(syntax: #export (<macro> [? omit^] token)
diff --git a/stdlib/source/lux/macro/syntax.lux b/stdlib/source/lux/macro/syntax.lux
index dd7a3ac06..45aaee1bb 100644
--- a/stdlib/source/lux/macro/syntax.lux
+++ b/stdlib/source/lux/macro/syntax.lux
@@ -18,7 +18,7 @@
              (struct [list #* "" Functor<List> Fold<List> "List/" Monoid<List>])
              [product]
              [error #- fail]))
-  (.. [ast]))
+  (.. [ast "AST/" Eq<AST>]))
 
 ## [Utils]
 (def: (join-pairs pairs)
@@ -78,7 +78,7 @@
 ## [Utils]
 (def: (remaining-inputs asts)
   (-> (List AST) Text)
-  ($_ Text/append " | Remaining input: "
+  ($_ Text/append "\nRemaining input: "
       (|> asts (map ast;to-text) (interpose " ") (text;join-with ""))))
 
 ## [Syntaxs]
@@ -90,7 +90,7 @@
       #;Nil                (#;Left "There are no tokens to parse!")
       (#;Cons [t tokens']) (#;Right [tokens' t]))))
 
-(do-template [<get-name> <ask-name> <demand-name> <type> <tag> <eq> <desc>]
+(do-template [<get-name> <type> <tag> <eq> <desc>]
   [(def: #export <get-name>
      {#;doc (#;TextM ($_ Text/append "Parses the next " <desc> " input AST."))}
      (Syntax <type>)
@@ -100,46 +100,47 @@
          (#;Right [tokens' x])
 
          _
-         (#;Left ($_ Text/append "Can't parse " <desc> (remaining-inputs tokens))))))
+         (#;Left ($_ Text/append "Can't parse " <desc> (remaining-inputs tokens))))))]
 
-   (def: #export (<ask-name> v)
-     {#;doc (#;TextM ($_ Text/append "Asks if the given " <desc> " is the next input AST."))}
-     (-> <type> (Syntax Bool))
-     (lambda [tokens]
-       (case tokens
-         (#;Cons [[_ (<tag> x)] tokens'])
-         (let [is-it? (:: <eq> = v x)
-               remaining (if is-it?
-                           tokens'
-                           tokens)]
-           (#;Right [remaining is-it?]))
+  [  bool  Bool   #;BoolS   bool;Eq<Bool> "bool"]
+  [   nat   Nat    #;NatS  number;Eq<Nat> "nat"]
+  [   int   Int    #;IntS  number;Eq<Int> "int"]
+  [  frac  Frac   #;FracS number;Eq<Frac> "frac"]
+  [  real  Real   #;RealS number;Eq<Real> "real"]
+  [  char  Char   #;CharS   char;Eq<Char> "char"]
+  [  text  Text   #;TextS   text;Eq<Text> "text"]
+  [symbol Ident #;SymbolS ident;Eq<Ident> "symbol"]
+  [   tag Ident    #;TagS ident;Eq<Ident> "tag"]
+  )
 
-         _
-         (#;Right [tokens false]))))
+(def: #export (sample? ast)
+  {#;doc "Asks if the given AST is the next input."}
+  (-> AST (Syntax Bool))
+  (lambda [tokens]
+    (case tokens
+      (#;Cons [token tokens'])
+      (let [is-it? (AST/= ast token)
+            remaining (if is-it?
+                        tokens'
+                        tokens)]
+        (#;Right [remaining is-it?]))
 
-   (def: #export (<demand-name> v)
-     {#;doc (#;TextM ($_ Text/append "Ensures the given " <desc> " is the next input AST."))}
-     (-> <type> (Syntax Unit))
-     (lambda [tokens]
-       (case tokens
-         (#;Cons [[_ (<tag> x)] tokens'])
-         (if (:: <eq> = v x)
-           (#;Right [tokens' []])
-           (#;Left ($_ Text/append "Expected a " <desc> " but instead got " (ast;to-text [_ (<tag> x)]) (remaining-inputs tokens))))
+      _
+      (#;Right [tokens false]))))
 
-         _
-         (#;Left ($_ Text/append "Can't parse " <desc> (remaining-inputs tokens))))))]
+(def: #export (sample! ast)
+  {#;doc "Ensures the given AST is the next input."}
+  (-> AST (Syntax Unit))
+  (lambda [tokens]
+    (case tokens
+      (#;Cons [token tokens'])
+      (if (AST/= ast token)
+        (#;Right [tokens' []])
+        (#;Left ($_ Text/append "Expected a " (ast;to-text ast) " but instead got " (ast;to-text token)
+                    (remaining-inputs tokens))))
 
-  [  bool   bool?   bool!  Bool   #;BoolS   bool;Eq<Bool> "bool"]
-  [   nat    nat?    nat!   Nat    #;NatS  number;Eq<Nat> "nat"]
-  [   int    int?    int!   Int    #;IntS  number;Eq<Int> "int"]
-  [  frac   frac?   frac!  Frac   #;FracS number;Eq<Frac> "frac"]
-  [  real   real?   real!  Real   #;RealS number;Eq<Real> "real"]
-  [  char   char?   char!  Char   #;CharS   char;Eq<Char> "char"]
-  [  text   text?   text!  Text   #;TextS   text;Eq<Text> "text"]
-  [symbol symbol? symbol! Ident #;SymbolS ident;Eq<Ident> "symbol"]
-  [   tag    tag?    tag! Ident    #;TagS ident;Eq<Ident> "tag"]
-  )
+      _
+      (#;Left "There are no tokens to parse!"))))
 
 (def: #export (assert message test)
   {#;doc "Fails with the given message if the test is false."}
diff --git a/stdlib/source/lux/macro/syntax/common.lux b/stdlib/source/lux/macro/syntax/common.lux
index 69564fc7d..72faa2ada 100644
--- a/stdlib/source/lux/macro/syntax/common.lux
+++ b/stdlib/source/lux/macro/syntax/common.lux
@@ -27,8 +27,8 @@
               #export
               #hidden)}
   (Syntax (Maybe Export-Level))
-  (s;opt (s;alt (s;tag! ["" "export"])
-                (s;tag! ["" "hidden"]))))
+  (s;opt (s;alt (s;sample! (' #export))
+                (s;sample! (' #hidden)))))
 
 (def: #export (gen-export-level ?el)
   (-> (Maybe Export-Level) (List AST))
@@ -70,7 +70,7 @@
 (def: check^
   (Syntax [(Maybe AST) AST])
   (s;either (s;form (do s;Monad<Syntax>
-                      [_ (s;symbol! ["lux" "_lux_:"])
+                      [_ (s;sample! (' lux;_lux_:))
                        type s;any
                        value s;any]
                       (wrap [(#;Some type) value])))
@@ -83,9 +83,9 @@
 
 (def: (_def-anns^ _)
   (-> Top (Syntax (List [Ident AST])))
-  (s;alt (s;tag! ["lux" "Nil"])
+  (s;alt (s;sample! (' #lux;Nil))
          (s;form (do s;Monad<Syntax>
-                   [_ (s;tag! ["lux" "Cons"])
+                   [_ (s;sample! (' #lux;Cons))
                     [head tail] (s;seq (s;tuple (s;seq _def-anns-tag^ s;any))
                                        (_def-anns^ []))]
                    (wrap [head tail])))
@@ -94,10 +94,10 @@
 (def: (flat-list^ _)
   (-> Top (Syntax (List AST)))
   (s;either (do s;Monad<Syntax>
-              [_ (s;tag! ["lux" "Nil"])]
+              [_ (s;sample! (' #lux;Nil))]
               (wrap (list)))
             (s;form (do s;Monad<Syntax>
-                      [_ (s;tag! ["lux" "Cons"])
+                      [_ (s;sample! (' #lux;Cons))
                        [head tail] (s;tuple (s;seq s;any s;any))
                        tail (s;local (list tail) (flat-list^ []))]
                       (wrap (#;Cons head tail))))))
@@ -105,13 +105,13 @@
 (def: list-meta^
   (Syntax (List AST))
   (s;form (do s;Monad<Syntax>
-            [_ (s;tag! ["lux" "ListM"])]
+            [_ (s;sample! (' #lux;ListM))]
             (flat-list^ []))))
 
 (def: text-meta^
   (Syntax Text)
   (s;form (do s;Monad<Syntax>
-            [_ (s;tag! ["lux" "TextM"])]
+            [_ (s;sample! (' #lux;TextM))]
             s;text)))
 
 (def: (find-def-args meta-data)
@@ -138,7 +138,7 @@
                       (compiler;macro-expand-all def-raw))]
     (s;local me-def-raw
              (s;form (do @
-                       [_ (s;symbol! ["lux" "_lux_def"])
+                       [_ (s;sample! (' lux;_lux_def))
                         def-name s;local-symbol
                         [?def-type def-value] check^
                         def-anns s;any
diff --git a/stdlib/source/lux/math.lux b/stdlib/source/lux/math.lux
index 4c7c2e92e..c1d855c8e 100644
--- a/stdlib/source/lux/math.lux
+++ b/stdlib/source/lux/math.lux
@@ -118,7 +118,7 @@
           (s/map ast;tag s;tag))
       (s;form (s;many s;any))
       (s;tuple (s;either (do s;Monad<Syntax>
-                           [_ (s;tag! ["" "and"])
+                           [_ (s;sample! (' #and))
                             init-subject (infix^ [])
                             init-op s;any
                             init-param (infix^ [])
diff --git a/stdlib/source/lux/test.lux b/stdlib/source/lux/test.lux
index 4bebfe10c..e7012f06e 100644
--- a/stdlib/source/lux/test.lux
+++ b/stdlib/source/lux/test.lux
@@ -136,10 +136,10 @@
 (def: config^
   (Syntax Test-Config)
   (s;alt (do s;Monad<Syntax>
-           [_ (s;tag! ["" "seed"])]
+           [_ (s;sample! (' #seed))]
            s;nat)
          (do s;Monad<Syntax>
-           [_ (s;tag! ["" "times"])]
+           [_ (s;sample! (' #times))]
            s;nat)))
 
 (def: property-test^