Bug: splitting define causes java regex error and arduino won't compile

[nothinman]

This doesn't compile:

define SERIAL_BANNER "\

1. Scan for sensors\n\
2. Change sensor I2C address\n\
3. Show readings for all sensors\n
   "

It causes this:
Exception in thread "Thread-6" java.lang.StackOverflowError
at java.util.regex.Pattern$Branch.match(Pattern.java:4114)
at java.util.regex.Pattern$GroupHead.match(Pattern.java:4168)
[..]

Changing it to:

define SERIAL_BANNER "1) Scan for sensors\n2) Change sensor I2C address\n3) Show readings for all sensors\n"

makes it work...

Marcin

[ffissore]

What IDE version are you using? IDE 1.5.x has a couple of fixes related to your problem

[agdl]

Waiting for feedback from too long. Reopen it if needed!

[peabo7]

Although this is a pre-pre-processor problem, it is also deprecated C++ syntax. The recommended way to write this is:

#define SERIAL_BANNER
"1) Scan for sensors\n"
"2) Change sensor I2C address\n"
"3) Show readings for all sensors\n"

This takes advantage of the fact that in modern C/C++ compilers, successive string literals are concatenated as if they had been written as a single literal.

Peter Olson

[ffissore]

Please give a try to the IDEs linked at the bottom of this email on the dev list
https://groups.google.com/a/arduino.cc/forum/#!msg/developers/4X2T3rCxXWM/YNJl6PZuDucJ
We're testing a new preprocessor and it compiles your sketch just fine.

[peabo7]

(I'm not the original poster.)

Tested this fix, it works.

Peter Olson

On January 28, 2015 at 11:18 AM Federico Fissore notifications@github.com
wrote:

Reopened #1935.

---

Reply to this email directly or view it on GitHub:
#1935 (comment)

[ffissore]

New preprocessor tracked at #2636. Builds for testing it are available

[Chris--A]

Using the source for 1.6.5, this does not cause an error.

[cmaglie]

I confirm that this has been fixed on the latest release. Please reopen if needed.