add .clang-format (#2395)

00f80d12 · Zhi · Tianqi Chen · be07fac5 · 00f80d12
Commit 00f80d12 authored 6 years ago by Zhi Committed by Tianqi Chen 6 years ago
--- a/.clang-format
+++ b/.clang-format
+# Run the following command to reformat a file:
+# clang-format -i -style=Google <file>
+# Or use clang-format-diff to only reformat the changed lines:
+# https://clang.llvm.org/docs/ClangFormat.html
+BasedOnStyle: Google
+DerivePointerAlignment: false
+ColumnLimit:     100
+PointerAlignment: Left