X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=src%2Fast.mli;h=e47ddc35fd1b65c5770e74fef64eb38b5c83a6bb;hb=3ed50d510dbab127125a8af9f72554c2dec72ef5;hp=978099e5d24bfe26bc406113485a924a9dda1e28;hpb=24cc20b33e3d81ed7d754391bef929276c1f4f42;p=goals.git

diff --git a/src/ast.mli b/src/ast.mli
index 978099e..e47ddc3 100644
--- a/src/ast.mli
+++ b/src/ast.mli
@@ -26,6 +26,9 @@ module Env : sig
   val fold: (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
   val filter: (key -> 'a -> bool) -> 'a t -> 'a t
   val bindings: 'a t -> (key * 'a) list
+
+  (* This is not the normal Map.merge function. *)
+  val merge : 'a t -> 'a t -> 'a t
 end
 
 (** Location where we parsed from $loc = $startpos, $endpos *)
@@ -40,16 +43,15 @@ type env = expr Env.t
 and pattern =
   (** match tactic such as *file ("filename") *)
   | PTactic of loc * id * substs list
-  (** match named variable, which must be a string, ETactic or
-      a list of those *)
-  | PVar of loc * id
 and expr =
-  (** goal (params) = patterns : exprs = code *)
-  | EGoal of loc * goal
-  (** goalname (params) etc. *)
-  | ECall of loc * id * expr list
-  (** *tactic (params) etc. *)
-  | ETactic of loc * id * expr list
+  (** goal (params) = patterns : exprs code *)
+  | EGoalDefn of loc * goal
+  (** tactic (params) = code *)
+  | ETacticDefn of loc * tactic
+  (** call goalname (params) etc. *)
+  | ECallGoal of loc * id * expr list
+  (** call *tactic (params) etc. *)
+  | ETacticCtor of loc * id * expr list
   (** variable, or goal call with no parameters *)
   | EVar of loc * id
   (** list *)
@@ -61,7 +63,8 @@ and expr =
 and constant =
   | CString of string
 and goal = param_decl list * pattern list * expr list * code option
-  (** Goal parameter is the parameter name and an optional default value. *)
+and tactic = param_decl list * code
+  (** Goal/tactic parameter. *)
 and param_decl = id
 and id = string
 and code = substs
@@ -80,6 +83,10 @@ val getvar : env -> loc -> id -> expr
     found or if the named variable is not a goal. *)
 val getgoal : env -> loc -> id -> goal
 
+(** Look up a tactic in the environment.  Raise [Failure _] if not
+    found or if the named variable is not a tactic. *)
+val gettactic : env -> loc -> id -> tactic
+
 (** Take any expression and simplify it down to a constant.
     If the expression cannot be simplified then this raises
     [Failure _]. *)
@@ -90,6 +97,12 @@ val to_constant : env -> expr -> constant
     raises [Failure _]. *)
 val substitute : env -> loc -> substs -> string
 
+(** Similar to {!substitute} except this is used where we will
+    pass the result immediately to the shell to execute.  Variables
+    are substituted with shell quoted strings.  Raises [Failure _]
+    on error. *)
+val to_shell_script : env -> loc -> substs -> string
+
 (** This is used for incrementally building Ast.substs in the parser. *)
 module Substs : sig
   type t
@@ -100,9 +113,8 @@ module Substs : sig
   val add_var : t -> string -> unit
 end
 
-(** Print all definitions in an environment. *)
-val print_env : out_channel -> env -> unit
-
 (** %a formatters. *)
+val print_env : out_channel -> env -> unit
 val string_pattern : unit -> pattern -> string
 val string_expr : unit -> expr -> string
+val print_expr : out_channel -> expr -> unit