d3a70f3b2c
Implement `F_C_STRING` to convert a Fortran string to a C null-terminated string. Documented in F2023 Standard: 18.2.3.9 `F_C_STRING (STRING [, ASIS])`.
50 lines
1.4 KiB
Fortran
50 lines
1.4 KiB
Fortran
! RUN: %python %S/test_errors.py %s %flang_fc1
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! Test semantic checking of F_C_STRING from ISO_C_BINDING
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program test
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use iso_c_binding
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implicit none
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character(len=20) :: str
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character(len=:), allocatable :: result
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logical :: flag
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integer :: n
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real :: x
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character(len=20), dimension(2) :: str_array
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! Valid usages
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result = f_c_string('hello')
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result = f_c_string(str)
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result = f_c_string(str, .true.)
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result = f_c_string(str, .false.)
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result = f_c_string(str, flag)
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result = f_c_string(string=str)
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result = f_c_string(string=str, asis=.true.)
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result = f_c_string(asis=.false., string=str)
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! Invalid: missing required argument
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!ERROR: missing mandatory 'string=' argument
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result = f_c_string()
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! Invalid: non-character first argument
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!ERROR: Actual argument for 'string=' has bad type 'INTEGER(4)'
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result = f_c_string(n)
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! Invalid: non-character first argument (real)
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!ERROR: Actual argument for 'string=' has bad type 'REAL(4)'
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result = f_c_string(x)
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! Invalid: non-logical second argument
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!ERROR: Actual argument for 'asis=' has bad type 'INTEGER(4)'
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result = f_c_string(str, n)
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! Invalid: too many arguments
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!ERROR: too many actual arguments for intrinsic '__builtin_f_c_string'
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result = f_c_string(str, .true., .false.)
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! Invalid: array argument (must be scalar)
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!ERROR: 'string=' argument has unacceptable rank 1
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result = f_c_string(str_array)
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end program
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