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// RUN: clang-tidy %s --checks='-*,llvm-namespace-comment,clang-diagnostic*' \
// RUN: -- -Wunused-variable 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-WARN -implicit-check-not='{{warning|error}}:'
// RUN: not clang-tidy %s --checks='-*,llvm-namespace-comment,clang-diagnostic*' \
// RUN: --warnings-as-errors='clang-diagnostic*' -- -Wunused-variable 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-WERR -implicit-check-not='{{warning|error}}:'
// RUN: not clang-tidy %s --checks='-*,llvm-namespace-comment,clang-diagnostic*' \
// RUN: --warnings-as-errors='clang-diagnostic*' -quiet -- -Wunused-variable 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-WERR-QUIET -implicit-check-not='{{warning|error}}:'
// RUN: clang-tidy %s --checks='-*,llvm-namespace-comment' --warnings-as-errors=* -- \
// RUN: -Wunused-variable 2>&1 | FileCheck %s --check-prefix=CHECK-SUPPRESSED \
// RUN: -implicit-check-not='{{warning|error}}:'
void f() { int i; }
// CHECK-WARN: warning: unused variable 'i' [clang-diagnostic-unused-variable]
// CHECK-WERR: error: unused variable 'i' [clang-diagnostic-unused-variable,-warnings-as-errors]
// CHECK-WERR-QUIET: error: unused variable 'i' [clang-diagnostic-unused-variable,-warnings-as-errors]
// CHECK-WARN-NOT: treated as
// CHECK-WERR: 1 warning treated as error
// CHECK-WERR-QUIET-NOT: treated as
// CHECK-SUPPRESSED-NOT: unused variable 'i'
// CHECK-SUPPRESSED: 1 warning generated.
// CHECK-SUPPRESSED: Suppressed 1 warnings (1 with check filters).
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