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! Verify that reading from stdin works as expected
! REQUIRES: new-flang-driver
!--------------------------
! FLANG DRIVER (flang)
!--------------------------
! Input type is implicit
! RUN: cat %s | %flang -E - | FileCheck %s --check-prefix=PP-NOT-DEFINED
! RUN: cat %s | %flang -DNEW -E - | FileCheck %s --check-prefix=PP-DEFINED
! Input type is explicit
! RUN: cat %s | %flang -E -x f95-cpp-input - | FileCheck %s --check-prefix=PP-NOT-DEFINED
! RUN: cat %s | %flang -DNEW -E -x f95-cpp-input - | FileCheck %s --check-prefix=PP-DEFINED
!---------------------------------------
! FLANG FRONTEND DRIVER (flang -fc1)
!---------------------------------------
! Test `-E`: for the corresponding frontend actions the driver relies on the prescanner API to handle file I/O
! RUN: cat %s | %flang -fc1 -E | FileCheck %s --check-prefix=PP-NOT-DEFINED
! RUN: cat %s | %flang -fc1 -DNEW -E | FileCheck %s --check-prefix=PP-DEFINED
! Test `-test-io`: for the corresponding frontend action (`InputOutputTestAction`) the driver handles the file I/O on its own
! the corresponding action (`PrintPreprocessedAction`)
! RUN: cat %s | %flang -fc1 -test-io | FileCheck %s --check-prefix=IO --match-full-lines
! RUN: cat %s | %flang -fc1 -DNEW -test-io | FileCheck %s --check-prefix=IO --match-full-lines
!-------------------------
! EXPECTED OUTPUT for `-E`
!-------------------------
! PP-NOT-DEFINED: program b
! PP-DEFINED: program a
!-------------------------------
! EXPECTED OUTPUT for `-test-io`
!-------------------------------
! IO: #ifdef NEW
! IO-NEXT: Program A
! IO-NEXT: #else
! IO-NEXT: Program B
! IO-NEXT: #endif
#ifdef NEW
Program A
#else
Program B
#endif
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