我如何获得错误被调用的位置？ [英] How can I get the position where error was called?

问题描述

我正在寻找替代 loch （及其预处理器）的内容，因为它没有使用ghc编译7.

具体来说，如果调用 error ，那么我想弄清楚，就像（行号和堆栈跟踪会很好）。

解决方案

您可以使用 -xc RTS选项，详见本页;你需要使用分析支持来编译你的程序，并且输出非常难看，但是它很有用。

这应该是这样做的：

  $ ghc --make -prof -auto-all myprog.hs 
 $ ./myprog + RTS -xc 
 成本中心堆栈，而不是真正的堆栈跟踪。改进的堆栈跟踪支持来自GHC 7.4  。
 
I am looking for something to replace loch (and its preprocessor) since it doesn't compile with ghc 7. 

Specifically, if error is called then I would like to figure out, as conveniently as possible, where it was called from (line number and stack trace would be nice).
解决方案
You can use the -xc RTS option, as described on this page; you need to compile your program with profiling support, and the output is pretty ugly, but it works.

This should do it:
$ ghc --make -prof -auto-all myprog.hs
$ ./myprog +RTS -xc
Technically this only gives a cost centre stack, not a true stack trace. Improved stack trace support is coming in GHC 7.4.

                        
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