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