Move semantic actions into their own module

base/derivation.rkt

@@ -17,17 +17,7 @@
     (-> semantic-action? parser-derivation? #:rest (listof parser-derivation?)
         nonterminal-derivation?))]
   [parser-derivation->syntax (-> parser-derivation? syntax?)]
-  [parser-derivation->datum (-> parser-derivation? any/c)]
-  [semantic-action? predicate/c]
-  [cut-action cut-action?]
-  [cut-action? predicate/c]
-  [splice-action splice-action?]
-  [splice-action? predicate/c]
-  [label-action? predicate/c]
-  [label-action (->* (any/c) (#:properties hash? #:expression-properties hash?) label-action?)]
-  [label-action-value (-> label-action? any/c)]
-  [label-action-properties (-> label-action? hash?)]
-  [label-action-expression-properties (-> label-action? hash?)]))
+  [parser-derivation->datum (-> parser-derivation? any/c)]))
 
 
 (require racket/match
@@ -35,6 +25,7 @@
          racket/struct
          rebellion/collection/vector
          rebellion/private/static-name
+         yaragg/base/semantic-action
          yaragg/base/token)
 
 
@@ -47,35 +38,6 @@
 ;@----------------------------------------------------------------------------------------------------
 
 
-(define (semantic-action? v)
-  (or (cut-action? v) (splice-action? v) (label-action? v)))
-
-
-(struct cut-action () #:transparent #:constructor-name constructor:cut-action #:omit-define-syntaxes)
-(define cut-action (constructor:cut-action))
-
-
-(struct splice-action ()
-  #:transparent #:constructor-name constructor:splice-action #:omit-define-syntaxes)
-(define splice-action (constructor:splice-action))
-
-
-(struct label-action (value expression-properties properties)
-  #:transparent
-  #:constructor-name constructor:label-action
-  #:omit-define-syntaxes
-  #:guard
-  (struct-guard/c any/c
-                  (hash/c any/c any/c #:immutable #true #:flat? #true)
-                  (hash/c any/c any/c #:immutable #true #:flat? #true)))
-
-
-(define (label-action value
-                      #:properties [properties (hash)]
-                      #:expression-properties [expression-properties (hash)])
-  (constructor:label-action value properties expression-properties))
-
-
 (define (parser-derivation? v)
   (or (terminal-derivation? v) (nonterminal-derivation? v)))
 

base/grammar.rkt

@@ -21,7 +21,8 @@
 (require racket/sequence
          racket/set
          rebellion/collection/vector
-         yaragg/base/derivation)
+         yaragg/base/derivation
+         yaragg/base/semantic-action)
 
 
 ;@----------------------------------------------------------------------------------------------------

base/semantic-action.rkt

@@ -0,0 +1,58 @@
+#lang racket/base
+
+
+(require racket/contract/base)
+
+
+(provide
+ (contract-out
+  [semantic-action? predicate/c]
+  [cut-action cut-action?]
+  [cut-action? predicate/c]
+  [splice-action splice-action?]
+  [splice-action? predicate/c]
+  [label-action? predicate/c]
+  [label-action (->* (any/c) (#:properties hash? #:expression-properties hash?) label-action?)]
+  [label-action-value (-> label-action? any/c)]
+  [label-action-properties (-> label-action? hash?)]
+  [label-action-expression-properties (-> label-action? hash?)]))
+
+
+(require racket/match
+         racket/sequence
+         racket/struct
+         rebellion/collection/vector
+         rebellion/private/static-name
+         yaragg/base/token)
+
+
+;@----------------------------------------------------------------------------------------------------
+
+
+(define (semantic-action? v)
+  (or (cut-action? v) (splice-action? v) (label-action? v)))
+
+
+(struct cut-action () #:transparent #:constructor-name constructor:cut-action #:omit-define-syntaxes)
+(define cut-action (constructor:cut-action))
+
+
+(struct splice-action ()
+  #:transparent #:constructor-name constructor:splice-action #:omit-define-syntaxes)
+(define splice-action (constructor:splice-action))
+
+
+(struct label-action (value expression-properties properties)
+  #:transparent
+  #:constructor-name constructor:label-action
+  #:omit-define-syntaxes
+  #:guard
+  (struct-guard/c any/c
+                  (hash/c any/c any/c #:immutable #true #:flat? #true)
+                  (hash/c any/c any/c #:immutable #true #:flat? #true)))
+
+
+(define (label-action value
+                      #:properties [properties (hash)]
+                      #:expression-properties [expression-properties (hash)])
+  (constructor:label-action value properties expression-properties))