Question

我实际上在编写一个包含这四个文件的个人Frama-C插件：

analyseTU_core.ml

module Options = AnalyseTU_options

open Cil_types

let rec member x list1 = match list1 with 
    []->false
    |hd :: tl -> if hd = x then true else member x tl

let rec sandr list2 result= match list2 with
    []-> Format.fprintf out "job termine"
    |hd :: tl -> if member hd result = false then begin result::hd ; Format.fprintf out hd; sandr tl result end
        else sandr tl result

class print_analyse out = object 
    inherit Visitor.frama_c_inplace

method vstmt s=
    let listing =[] in
    let impacted = !Db.Impact.compute_pragmas in
    let impacted2= impacted.Stmt.loc in
    sandr impacted2 listing;
    Cil.DoChildren
   end

和：

analyseTU_register.ml

open AnalyseTU_options
open AnalyseTU_core

let run () =
    if Enabled.get () then
    let filename=OutputFile.get () in
    let chan = open_out filename in
    let fmt = Format.formatter_of_out_channel chan in
    Visitor.visitFramacFileSameGlobals (new print_analyse fmt) (Ast.get ());
    close_out chan

let () = Db.Main.extend run

和：

analyseTU_options.ml

module Self = Plugin.register 
(struct
  let name = "analyse TU"
  let shortname = "TU"
  let help = "impacted statements computation from a source code modification and display consequently unit tests to be run in an output file"
end)

module Enabled = Self.False 
(struct
  let optilon_name = "-TU"
  let help = "when on (off by default), give the unit tests to be run"
end)

module OutputFile = Self.String 
(struct
  let option_name = "-TU-output"
  let default = "TUresults.txt"
  let arg_name = "output-file"
  let help = "name of the output file"
end)

最后是makefile：

FRAMAC_SHARE := $(shell frama-c -print-path)
FRAMAC_LIBDIR := $(shell frama-c -print-libpath)
PLUGIN_NAME = analyseTU
PLUGIN_CMO = analyseTU_options analyseTU_core analyseTU_register
include $(FRAMAC_SHARE)/Makefile.dynamic

所以，当我使用make命令编译它时，我实际上得到了：

FILE "analyseTU_core.ml", line 9 :
Error: unbound value out
make : *** [analyseTU_core.cmo] erreur 2

我是这么想的，这是因为事实＆＃39; out＆＃39;编译器不知道，我重新推出了＃39; out＆＃39; by＆＃39;陈＆＃39;顺便说一下，我遇到了同样的错误。

＆＃39; out＆＃39;未在开发人员指南的代码中定义，最后我认为这个错误不是我认为的错误......

你有过见过吗？如果是的话，你是怎么处理它的？

Answer 1

正如camlspotter所说，错误确实只是意味着out未在环境中定义。您必须将其作为方法的参数提供，或者在某处定义全局out格式化程序。另一种可能性是使用printf代替fprintf，printf作为stdout输出，因此不需要格式化程序作为参数。最后，在Frama-C的特定上下文中，您应该考虑使用Analyse_TU_option.Self.feedback或其中一个同伴（result，debug，...）作为输出。

带有Format.fprintf的未绑定值

1 个答案: