string_loc loc name in
tactic
-let rec to_constant env = function
- | EConstant (loc, c) -> c
-
- | EVar (loc, name) ->
- let expr = getvar env loc name in
- to_constant env expr
-
- | ESubsts (loc, str) ->
- CString (substitute env loc str)
-
- | EList (loc, _) ->
- failwithf "%a: list found where constant expression expected"
- string_loc loc
-
- | ECallGoal (loc, name, _) ->
- failwithf "%a: cannot use goal ‘%s’ in constant expression"
- string_loc loc name
-
- | ETacticCtor (loc, name, _) ->
- failwithf "%a: cannot use tactic ‘%s’ in constant expression"
- string_loc loc name
-
- | EGoalDefn (loc, _) ->
- failwithf "%a: cannot use goal in constant expression"
- string_loc loc
-
- | ETacticDefn (loc, _) ->
- failwithf "%a: cannot use tactic in constant expression"
- string_loc loc
-
-and substitute env loc substs =
- let b = Buffer.create 13 in
- List.iter (
- function
- | SString s -> Buffer.add_string b s
- | SVar name ->
- let expr = getvar env loc name in
- match to_constant env expr with
- | CString s -> Buffer.add_string b s
- ) substs;
- Buffer.contents b
-
-let rec to_shell_script env loc substs =
- let b = Buffer.create 13 in
- List.iter (
- function
- | SString s -> Buffer.add_string b s
- | SVar name ->
- let expr = getvar env loc name in
- let s = expr_to_shell_string env expr in
- Buffer.add_string b s
- ) substs;
- Buffer.contents b
-
-and expr_to_shell_string env = function
- | EConstant (loc, CString s) -> Filename.quote s
-
- | EVar (loc, name) ->
- let expr = getvar env loc name in
- expr_to_shell_string env expr
-
- | ESubsts (loc, str) ->
- Filename.quote (substitute env loc str)
-
- | EList (loc, exprs) ->
- let strs = List.map (expr_to_shell_string env) exprs in
- (* These are shell quoted so we can just concat them with space. *)
- String.concat " " strs
-
- | ECallGoal (loc, name, _) ->
- failwithf "%a: cannot use goal ‘%s’ in shell expansion"
- string_loc loc name
-
- (* Tactics expand to the first parameter. *)
- | ETacticCtor (loc, _, []) -> Filename.quote ""
- | ETacticCtor (loc, _, (arg :: _)) -> expr_to_shell_string env arg
-
- | EGoalDefn (loc, _) ->
- failwithf "%a: cannot use goal in shell expansion"
- string_loc loc
-
- | ETacticDefn (loc, _) ->
- failwithf "%a: cannot use tactic in shell expansion"
- string_loc loc
-
module Substs = struct
type t = {
mutable elems : subst list; (* built in reverse order *)
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 _]. *)
-val to_constant : env -> expr -> constant
-
-(** Take a substitution list and try to turn it into a simple
- string by evaluating every variable. If not possible this
- 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