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Add a comment explaining a test for -disable-batch-mode -index-file #16074

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Apr 20, 2018
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Add a comment explaining a test for -disable-batch-mode -index-file #16074

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6 changes: 6 additions & 0 deletions test/Driver/batch_mode_with_WMO_or_index.swift
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Expand Up @@ -13,6 +13,12 @@
// RUN: %FileCheck -check-prefix CHECK-INDEX %s <%t/stderr_batch_index
// CHECK-INDEX: warning: ignoring '-enable-batch-mode' because '-index-file' was also specified
//
// The following test is verifying that -disable-batch-mode overrides an earlier
// -enable-batch-mode and silences the warning about mixing batch mode with
// -index-file. Tools that take an existing command line and add -index-file can
// thus add -disable-batch-mode without having to otherwise interpret the
// arguments.
//
// RUN: %swiftc_driver -disable-batch-mode -index-file %S/../Inputs/empty.swift -### 2>%t/stderr_nobatch_index | %FileCheck %s
// RUN: %swiftc_driver -enable-batch-mode -index-file %S/../Inputs/empty.swift -disable-batch-mode -### 2>%t/stderr_batch_nobatch_index | %FileCheck %s
// RUN: %FileCheck -allow-empty -check-prefix CHECK-INDEX-DISABLED %s <%t/stderr_nobatch_index
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