|Summary:||Parsing error with template in Eigen_Colamd.h|
Description Jérémie 2016-01-05 09:49:53 UTC
Created attachment 643 [details] Minimal example code to reproduce the bug. In the file Eigen_Colamd.h, the line 519 "if (Col [col].length < 0)" can sometimes lead to compilation errors depending on the surrounding user code. A seemingly benign minimal example is given in attachment, where the user creates a templated "length" function, included in a header before Eigen. This leads to compilation errors "Eigen_Colamd.h:519:19: error: parse error in template argument list" and "Eigen_Colamd.h:519:5: error: ‘length’ is not a member template function". Using > instead of < for the comparison does the trick here, but there might be some other places where such an issue can arise.
Comment 1 Christoph Hertzberg 2016-01-06 11:04:38 UTC
Thanks for the report. This is likely caused by a gcc bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=10200 I worked-around using parentheses (for devel and 3.2): https://bitbucket.org/eigen/eigen/commits/667570c89d3 https://bitbucket.org/eigen/eigen/commits/56ce6e48d77
Comment 2 Nobody 2019-12-04 15:18:57 UTC
-- GitLab Migration Automatic Message -- This bug has been migrated to gitlab.com's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.com/libeigen/eigen/issues/1143.