[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index] - Subject: Re: Line info for Lua Scripts
- From: Wayne Collins <wcollins@...>
- Date: Tue, 19 Jun 2001 08:34:48 -0400
twoonkio wrote: > > As I use the literate programming tool noweb > (http://www.eecs.harvard.edu/~nr/noweb/), source codes are generated from > the document files. Suppose the document is called 'doc.nw' and the > generated lua code 'code.lua'. When there is a syntax error, the lua > interpreter points to the problem line in 'code.lua'. However, the line > number does not coincides with the actual line number in 'doc.nw'. As the > document grew, it becomes harder to trace the error message back to the > actual location in the file 'doc.nw'. > > I usually use lua for scripting. Is there a good way to modify the lua > interpreter 'lua' such that it is able to handle metainformation such as ' > #line 40 "doc.nw" '? Better still, is there a way to simply add some codes > within 'code.lua' that modifies the state of dblib's 'currentline' > appropriately? In the second way, the interpreter need not be modified. I think that this would be a lovely "patch" to Lua. I think this because I have exactly the same problem but with nuweb in place of noweb. The "#line" solution gets my vote. > > Thanks, > - WK > > >From: Roberto Ierusalimschy <roberto@inf.puc-rio.br> > > Date: Tue Jun 12, 2001 12:35 pm > >Subject: Re: Line info for Lua Scripts > > > > > Does Lua supports some kind of meta line information? > > > >The debug library (dblib) has a function that returns (among other things) > >the current line number, but it is not very efficient (it does a kind of > >search into an internal data structure, and also builds a table to return > >its results; its main use is for debugging ;-) > > > >print(getinfo(1, 'l').currentline) > > > > -- Roberto > > twoonkio wrote: > > > Hi, > > > > Does Lua supports some kind of meta line information? > > > > For instance, in C, line information can be included in generated source > > codes as follows: > > > > > #line 40 "doc.nw" > > > double f(int x) > > > : > > > > Is there any equivalent syntax for Lua scripts? > > > > Regards, > > - WK
