| #!/usr/bin/env bash | 
 | # | 
 | # This script produces a list of all diagnostics that are defined | 
 | # in Diagnostic*.td files but not used in sources. | 
 | # | 
 |  | 
 | # Gather all diagnostic identifiers from the .td files. | 
 | ALL_DIAGS=$(grep -E --only-matching --no-filename '(err_|warn_|ext_|note_)[a-z_]+' ./include/clang/Basic/Diagnostic*.td) | 
 |  | 
 | # Now look for all potential identifiers in the source files. | 
 | ALL_SOURCES=$(find lib include tools utils -name \*.cpp -or -name \*.h) | 
 | DIAGS_IN_SOURCES=$(grep -E --only-matching --no-filename '(err_|warn_|ext_|note_)[a-z_]+' $ALL_SOURCES) | 
 |  | 
 | # Print all diags that occur in the .td files but not in the source. | 
 | comm -23 <(sort -u <<< "$ALL_DIAGS") <(sort -u <<< "$DIAGS_IN_SOURCES") |