On Thursday, June 11, 2015 07:40:51 PM David Crayford wrote:
I love it. I've got a Lua for z/OS port and REXX is *the* scripting
language of the mainframe. It's tricky for REXXers to learn Lua string
patterns when they are so used to parse, which is much simpler for lots
of use cases. Does your library handle positional parsing?
Yes it does. Also relative positions and positions supplied by a variable: the
"=(vref)" format.
It would be nice to be able to pre-compile a template pattern for
optimization. For example, parsing a large text file.
This is currently handled by the same parse function. The single call
result = rexxparse.parse(testString, matchPattern, envTable)
has the arguments in that order to look similar to the Rexx command. But it
can only handle a single string argument. The expanded way to call the parser
and the only way to pass multiple arguments is
parser = rexxparse.parse(matchPattern)
result = parser(envTable, testString)
The parser is a coroutine that can be invoked again to parse other strings. If
this is too confusing I could make it two separate functions.
local today = os.date "%m/%d"
local parser = rexxparse.parse "name1 11 name2 21 birthday 26" -- no year
for record in io.lines("memberslist.txt") do
local memberInfo = parser(record)
if memberInfo.birthday == today then
sendmail(memberInfo.name2 .. " "..memberInfo.name1,
"Happy birthday!")
end
end
