如何在Emacs中实现错误追溯？ [英] How to realize error traceback in Emacs?

问题描述

我正在Ocaml编写一个编译器。当我编译并在终端中使用 make 进行编译和调试时，tracback会很好，例如：

  export OCAMLRUNPARAM = b 
 ./Simpler-Basic test.sib 
致命错误：异常Match_failure（interp.ml，45,21）
从文件第97行，字符72-86 
从文件list.ml中调用，第74行，字符24-34 
从文件interp.ml调用，第108行，字符9 -35 
从文件main.ml中调用，第54行，字符4-17 
 make：*** [all]错误2 
   Meta-x编译编译并在我的Emacs中测试它，然后是$ code > make ，它不会在缓冲区中显示回溯部分：
  make 
导出OCAMLRUNPARAM = b 
 ./Simpler-Basic test.sib 
致命错误：异常Match_failure（interp.ml，45,21）
 make：*** [all]错误2 
 
编译在6月18日星期六异常退出代码2 19:03:04 
  
 Ther e是我的 .emacs 中的一部分，用于执行我从朋友复制的追溯： http://paste.ubuntu.com/628838/  
 
 
 
有人可以告诉我如何修改我的 .emacs ，以便在终端中显示追溯？非常感谢你
解决方案
你在哪里写了 export OCAMLRUNPARAM = b  ？
 
 
 
如果你在一个makefile中写这个（↹代表一个选项卡）：
 code>↹exportOCAMLRUNPARAM = b 
↹。/ Simpleer-Basic test.sib 
  
然后它不起作用，因为每个makefile命令在单独的shell中执行，所以环境变量赋值在第一行完成之后就会消失。您可以将两行合并在一条逻辑行中：
 ↹exportOCAMLRUNPARAM = b; \ 
↹。/ Simpleer-Basic test.sib 
  
如果你总是想要回溯在Emacs内运行一个Ocaml程序，在 .emacs 中设置环境变量：
 （setenvOCAMLRUNPARAMb）
  
为了让Emacs识别回溯消息作为与位置的错误消息，您需要在  compilation-regexp-alist  。在你的 .emacs （未经测试）中放入这样的东西：
  eval-after-loadcaml
（add-to-list'compilation-regexp-alist 
'（\\（^ Raised at\\\ | |来自于\\ ）文件\\\（[^\\\
] + \\）\，行\\（[0-9] + \\）
 2 3）））
  
 
I am writing a compiler in Ocaml. The tracback works well when I compile and test it with make in a terminal, for instance:
export OCAMLRUNPARAM=b
./Simpler-Basic test.sib
Fatal error: exception Match_failure("interp.ml", 45, 21)
Called from file "interp.ml", line 97, characters 72-86
Called from file "list.ml", line 74, characters 24-34
Called from file "interp.ml", line 108, characters 9-35
Called from file "main.ml", line 54, characters 4-17
make: *** [all] Error 2
But when I compile and test it in my Emacs by Meta-x compile followed by make, it does not show the traceback part in the buffer:
make
export OCAMLRUNPARAM=b
./Simpler-Basic test.sib
Fatal error: exception Match_failure("interp.ml", 45, 21)
make: *** [all] Error 2

Compilation exited abnormally with code 2 at Sat Jun 18 19:03:04
There is a part in my .emacs to do traceback that I copied from a friend: http://paste.ubuntu.com/628838/

Could anyone tell me how to amend my .emacs so that it shows traceback as in a terminal? Thank you very much
解决方案
Where did you write export OCAMLRUNPARAM=b?

If you wrote this in a makefile (↹ stands for a tab):
↹export OCAMLRUNPARAM=b
↹./Simpler-Basic test.sib
then it doesn't work because each makefile command is executed in a separate shell, so the environment variable assignment vanishes after the first line completes. You can combine the two lines in a single logical line instead:
↹export OCAMLRUNPARAM=b; \
↹./Simpler-Basic test.sib
If you always want backtraces when running an Ocaml program from within Emacs, set the environment variable in your .emacs:
(setenv "OCAMLRUNPARAM" "b")
In order for Emacs to recognize the backtrace messages as error messages with a location, you need to register them in compilation-regexp-alist. Put something like this in your .emacs (untested):
(eval-after-load "caml"
  (add-to-list 'compilation-regexp-alist
               '("\\(^Raised at\\|Called from\\) file \"\\([^"\n]+\\)\", line \\([0-9]+\\)"
                 2 3)))


                        
这篇关于如何在Emacs中实现错误追溯？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！