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-rw-r--r--gcc/fortran/ChangeLog13
-rw-r--r--gcc/fortran/gfortran.texi17
-rw-r--r--gcc/fortran/invoke.texi25
-rw-r--r--gcc/fortran/io.c31
-rw-r--r--gcc/fortran/lang.opt4
-rw-r--r--gcc/fortran/options.c1
-rw-r--r--gcc/testsuite/ChangeLog13
-rw-r--r--gcc/testsuite/gfortran.dg/fmt_f_default_field_width_1.f9040
-rw-r--r--gcc/testsuite/gfortran.dg/fmt_f_default_field_width_2.f9043
-rw-r--r--gcc/testsuite/gfortran.dg/fmt_f_default_field_width_3.f9030
-rw-r--r--gcc/testsuite/gfortran.dg/fmt_g_default_field_width_1.f9045
-rw-r--r--gcc/testsuite/gfortran.dg/fmt_g_default_field_width_2.f9048
-rw-r--r--gcc/testsuite/gfortran.dg/fmt_g_default_field_width_3.f9033
-rw-r--r--gcc/testsuite/gfortran.dg/fmt_i_default_field_width_1.f9040
-rw-r--r--gcc/testsuite/gfortran.dg/fmt_i_default_field_width_2.f9044
-rw-r--r--gcc/testsuite/gfortran.dg/fmt_i_default_field_width_3.f9037
16 files changed, 450 insertions, 14 deletions
diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index e6ae6bc..f119e74 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,16 @@
+2019-05-22 Jeff Law <law@redhat.com>
+ Mark Eggleston <mark.eggleston@codethink.com>
+
+ PR fortran/89100
+ * gfortran.texi: Add Default widths for F, G and I format
+ descriptors to Extensions section.
+ * invoke.texi: Add -fdec-format-defaults
+ * io.c (check_format): Use default widths for i, f and g when
+ flag_dec_format_defaults is enabled.
+ * lang.opt: Add new option.
+ * options.c (set_dec_flags): Add SET_BITFLAG for
+ flag_dec_format_defaults.
+
2019-05-21 Janne Blomqvist <jb@gcc.gnu.org>
PR libfortran/90038
diff --git a/gcc/fortran/gfortran.texi b/gcc/fortran/gfortran.texi
index 6c746e3..57461e0 100644
--- a/gcc/fortran/gfortran.texi
+++ b/gcc/fortran/gfortran.texi
@@ -1576,6 +1576,7 @@ additional compatibility extensions along with those enabled by
* X format descriptor without count field::
* Commas in FORMAT specifications::
* Missing period in FORMAT specifications::
+* Default widths for F@comma{} G and I format descriptors::
* I/O item lists::
* @code{Q} exponent-letter::
* BOZ literal constants::
@@ -1782,6 +1783,22 @@ discouraged.
10 FORMAT ('F4')
@end smallexample
+@node Default widths for F@comma{} G and I format descriptors
+@subsection Default widths for @code{F}, @code{G} and @code{I} format descriptors
+
+To support legacy codes, GNU Fortran allows width to be omitted from format
+specifications if and only if @option{-fdec-format-defaults} is given on the
+command line. Default widths will be used. This is considered non-conforming
+code and is discouraged.
+
+@smallexample
+ REAL :: value1
+ INTEGER :: value2
+ WRITE(*,10) value1, value1, value2
+10 FORMAT ('F, G, I')
+@end smallexample
+
+
@node I/O item lists
@subsection I/O item lists
@cindex I/O item lists
diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi
index ec3b040..73b836e 100644
--- a/gcc/fortran/invoke.texi
+++ b/gcc/fortran/invoke.texi
@@ -117,16 +117,16 @@ by type. Explanations are in the following sections.
@item Fortran Language Options
@xref{Fortran Dialect Options,,Options controlling Fortran dialect}.
@gccoptlist{-fall-intrinsics -fbackslash -fcray-pointer -fd-lines-as-code @gol
--fd-lines-as-comments @gol
--fdec -fdec-structure -fdec-intrinsic-ints -fdec-static -fdec-math @gol
--fdec-include -fdefault-double-8 -fdefault-integer-8 -fdefault-real-8 @gol
--fdefault-real-10 -fdefault-real-16 -fdollar-ok -ffixed-line-length-@var{n} @gol
--ffixed-line-length-none -fpad-source -ffree-form -ffree-line-length-@var{n} @gol
--ffree-line-length-none -fimplicit-none -finteger-4-integer-8 @gol
--fmax-identifier-length -fmodule-private -ffixed-form -fno-range-check @gol
--fopenacc -fopenmp -freal-4-real-10 -freal-4-real-16 -freal-4-real-8 @gol
--freal-8-real-10 -freal-8-real-16 -freal-8-real-4 -std=@var{std}
--ftest-forall-temp
+-fd-lines-as-comments -fdec -fdec-structure -fdec-intrinsic-ints @gol
+-fdec-static -fdec-math -fdec-include -fdec-format-defaults @gol
+-fdefault-double-8 -fdefault-integer-8 -fdefault-real-8 -fdefault-real-10 @gol
+-fdefault-real-16 -fdollar-ok -ffixed-line-length-@var{n} @gol
+-ffixed-line-length-none -fpad-source -ffree-form @gol
+-ffree-line-length-@var{n} -ffree-line-length-none @gol
+-fimplicit-none -finteger-4-integer-8 -fmax-identifier-length @gol
+-fmodule-private -ffixed-form -fno-range-check -fopenacc -fopenmp @gol
+-freal-4-real-10 -freal-4-real-16 -freal-4-real-8 -freal-8-real-10 @gol
+-freal-8-real-16 -freal-8-real-4 -std=@var{std} -ftest-forall-temp
}
@item Preprocessing Options
@@ -283,6 +283,11 @@ Enable parsing of INCLUDE as a statement in addition to parsing it as
INCLUDE line. When parsed as INCLUDE statement, INCLUDE does not have to
be on a single line and can use line continuations.
+@item -fdec-format-defaults
+@opindex @code{fdec-format-defaults}
+Enable format specifiers F, G and I to be used without width specifiers,
+default widths will be used instead.
+
@item -fdollar-ok
@opindex @code{fdollar-ok}
@cindex @code{$}
diff --git a/gcc/fortran/io.c b/gcc/fortran/io.c
index 9828897..5711757 100644
--- a/gcc/fortran/io.c
+++ b/gcc/fortran/io.c
@@ -903,6 +903,13 @@ data_desc:
if (u != FMT_POSINT)
{
+ if (flag_dec_format_defaults)
+ {
+ /* Assume a default width based on the variable size. */
+ saved_token = u;
+ break;
+ }
+
format_locus.nextc += format_string_pos;
gfc_error ("Positive width required in format "
"specifier %s at %L", token_to_string (t),
@@ -1027,6 +1034,13 @@ data_desc:
goto fail;
if (t != FMT_ZERO && t != FMT_POSINT)
{
+ if (flag_dec_format_defaults)
+ {
+ /* Assume the default width is expected here and continue lexing. */
+ value = 0; /* It doesn't matter what we set the value to here. */
+ saved_token = t;
+ break;
+ }
error = nonneg_required;
goto syntax;
}
@@ -1096,8 +1110,17 @@ data_desc:
goto fail;
if (t != FMT_ZERO && t != FMT_POSINT)
{
- error = nonneg_required;
- goto syntax;
+ if (flag_dec_format_defaults)
+ {
+ /* Assume the default width is expected here and continue lexing. */
+ value = 0; /* It doesn't matter what we set the value to here. */
+ saved_token = t;
+ }
+ else
+ {
+ error = nonneg_required;
+ goto syntax;
+ }
}
else if (is_input && t == FMT_ZERO)
{
@@ -4368,8 +4391,8 @@ get_io_list:
}
/* See if we want to use defaults for missing exponents in real transfers
- and other DEC runtime extensions. */
- if (flag_dec)
+ and other DEC runtime extensions. */
+ if (flag_dec_format_defaults)
dt->dec_ext = 1;
/* A full IO statement has been matched. Check the constraints. spec_end is
diff --git a/gcc/fortran/lang.opt b/gcc/fortran/lang.opt
index 80edc11..4d2340a 100644
--- a/gcc/fortran/lang.opt
+++ b/gcc/fortran/lang.opt
@@ -452,6 +452,10 @@ fdec-include
Fortran Var(flag_dec_include)
Enable legacy parsing of INCLUDE as statement.
+fdec-format-defaults
+Fortran Var(flag_dec_format_defaults)
+Enable default widths for i, f and g format specifiers.
+
fdec-intrinsic-ints
Fortran Var(flag_dec_intrinsic_ints)
Enable kind-specific variants of integer intrinsic functions.
diff --git a/gcc/fortran/options.c b/gcc/fortran/options.c
index 02970d5..4f91486 100644
--- a/gcc/fortran/options.c
+++ b/gcc/fortran/options.c
@@ -74,6 +74,7 @@ set_dec_flags (int value)
SET_BITFLAG (flag_dec_static, value, value);
SET_BITFLAG (flag_dec_math, value, value);
SET_BITFLAG (flag_dec_include, value, value);
+ SET_BITFLAG (flag_dec_format_defaults, value, value);
}
/* Finalize DEC flags. */
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index bee1a60..07a473d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,16 @@
+2019-05-22 Mark Eggleston <mark.eggleston@codethink.com>
+
+ PR fortran/89100
+ * gfortran.dg/fmt_f_default_field_width_1.f90: New test.
+ * gfortran.dg/fmt_f_default_field_width_2.f90: New test.
+ * gfortran.dg/fmt_f_default_field_width_3.f90: New test.
+ * gfortran.dg/fmt_g_default_field_width_1.f90: New test.
+ * gfortran.dg/fmt_g_default_field_width_2.f90: New test.
+ * gfortran.dg/fmt_g_default_field_width_3.f90: New test.
+ * gfortran.dg/fmt_i_default_field_width_1.f90: New test.
+ * gfortran.dg/fmt_i_default_field_width_2.f90: New test.
+ * gfortran.dg/fmt_i_default_field_width_3.f90: New test.
+
2019-05-22 Martin Liska <mliska@suse.cz>
PR testsuite/90564
diff --git a/gcc/testsuite/gfortran.dg/fmt_f_default_field_width_1.f90 b/gcc/testsuite/gfortran.dg/fmt_f_default_field_width_1.f90
new file mode 100644
index 0000000..5c08342
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_f_default_field_width_1.f90
@@ -0,0 +1,40 @@
+! { dg-do run }
+! { dg-options -fdec }
+!
+! Test case for the default field widths enabled by the -fdec-format-defaults flag.
+!
+! This feature is not part of any Fortran standard, but it is supported by the
+! Oracle Fortran compiler and others.
+!
+
+program test
+ character(50) :: buffer
+
+ real(4) :: real_4
+ real(8) :: real_8
+ real(16) :: real_16
+ integer :: len
+ character(*), parameter :: fmt = "(A, F, A)"
+
+ real_4 = 4.18
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 4.1799998:") stop 1
+
+ real_4 = 0.00000018
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 0.0000002:") stop 2
+
+ real_8 = 4.18
+ write(buffer, fmt) ':',real_8,':'
+ print *,buffer
+ len = len_trim(buffer)
+ if (len /= 27) stop 3
+
+ real_16 = 4.18
+ write(buffer, fmt) ':',real_16,':'
+ print *,buffer
+ len = len_trim(buffer)
+ if (len /= 44) stop 4
+end
diff --git a/gcc/testsuite/gfortran.dg/fmt_f_default_field_width_2.f90 b/gcc/testsuite/gfortran.dg/fmt_f_default_field_width_2.f90
new file mode 100644
index 0000000..fd5b1d2
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_f_default_field_width_2.f90
@@ -0,0 +1,43 @@
+! { dg-do run }
+! { dg-options -fdec-format-defaults }
+!
+! Test case for the default field widths enabled by the -fdec-format-defaults flag.
+!
+! This feature is not part of any Fortran standard, but it is supported by the
+! Oracle Fortran compiler and others.
+!
+! Test case added by Mark Eggleston <mark.eggleston@codethink.com> to check
+! use of -fdec-format-defaults
+!
+
+program test
+ character(50) :: buffer
+
+ real(4) :: real_4
+ real(8) :: real_8
+ real(16) :: real_16
+ integer :: len
+ character(*), parameter :: fmt = "(A, F, A)"
+
+ real_4 = 4.18
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 4.1799998:") stop 1
+
+ real_4 = 0.00000018
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 0.0000002:") stop 2
+
+ real_8 = 4.18
+ write(buffer, fmt) ':',real_8,':'
+ print *,buffer
+ len = len_trim(buffer)
+ if (len /= 27) stop 3
+
+ real_16 = 4.18
+ write(buffer, fmt) ':',real_16,':'
+ print *,buffer
+ len = len_trim(buffer)
+ if (len /= 44) stop 4
+end
diff --git a/gcc/testsuite/gfortran.dg/fmt_f_default_field_width_3.f90 b/gcc/testsuite/gfortran.dg/fmt_f_default_field_width_3.f90
new file mode 100644
index 0000000..6852f8e
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_f_default_field_width_3.f90
@@ -0,0 +1,30 @@
+! { dg-do compile }
+! { dg-options "-fdec -fno-dec-format-defaults" }
+!
+! Test case for the default field widths not enabled.
+!
+! Test case added by Mark Eggleston <mark.eggleston@codethink.com> to check
+! use of -fno-dec-format-defaults
+!
+
+program test
+ character(50) :: buffer
+
+ real*4 :: real_4
+ real*8 :: real_8
+ real*16 :: real_16
+ integer :: len
+ character(*), parameter :: fmt = "(A, F, A)"
+
+ real_4 = 4.18
+ write(buffer, fmt) ':',real_4,':' ! { dg-error "Nonnegative width required" }
+
+ real_4 = 0.00000018
+ write(buffer, fmt) ':',real_4,':' ! { dg-error "Nonnegative width required" }
+
+ real_8 = 4.18
+ write(buffer, fmt) ':',real_8,':' ! { dg-error "Nonnegative width required" }
+
+ real_16 = 4.18
+ write(buffer, fmt) ':',real_16,':' ! { dg-error "Nonnegative width required" }
+end
diff --git a/gcc/testsuite/gfortran.dg/fmt_g_default_field_width_1.f90 b/gcc/testsuite/gfortran.dg/fmt_g_default_field_width_1.f90
new file mode 100644
index 0000000..028cd11
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_g_default_field_width_1.f90
@@ -0,0 +1,45 @@
+! { dg-do run }
+! { dg-options -fdec }
+!
+! Test case for the default field widths enabled by the -fdec-format-defaults flag.
+!
+! This feature is not part of any Fortran standard, but it is supported by the
+! Oracle Fortran compiler and others.
+!
+
+program test
+ character(50) :: buffer
+
+ real(4) :: real_4
+ real(8) :: real_8
+ real(16) :: real_16
+ integer :: len
+ character(*), parameter :: fmt = "(A, G, A)"
+
+ real_4 = 4.18
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 4.180000 :") stop 1
+
+ real_4 = 0.00000018
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 0.1800000E-06:") stop 2
+
+ real_4 = 18000000.4
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 0.1800000E+08:") stop 3
+
+ real_8 = 4.18
+ write(buffer, fmt) ':',real_8,':'
+ print *,buffer
+ len = len_trim(buffer)
+ if (len /= 27) stop 4
+
+ real_16 = 4.18
+ write(buffer, fmt) ':',real_16,':'
+ print *,buffer
+ len = len_trim(buffer)
+ if (len /= 44) stop 5
+end
diff --git a/gcc/testsuite/gfortran.dg/fmt_g_default_field_width_2.f90 b/gcc/testsuite/gfortran.dg/fmt_g_default_field_width_2.f90
new file mode 100644
index 0000000..45c98c7
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_g_default_field_width_2.f90
@@ -0,0 +1,48 @@
+! { dg-do run }
+! { dg-options -fdec-format-defaults }
+!
+! Test case for the default field widths enabled by the -fdec-format-defaults flag.
+!
+! This feature is not part of any Fortran standard, but it is supported by the
+! Oracle Fortran compiler and others.
+!
+! Test case added by Mark Eggleston <mark.eggleston@codethink.com> to check
+! use of -fdec-format-defaults
+!
+
+program test
+ character(50) :: buffer
+
+ real(4) :: real_4
+ real(8) :: real_8
+ real(16) :: real_16
+ integer :: len
+ character(*), parameter :: fmt = "(A, G, A)"
+
+ real_4 = 4.18
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 4.180000 :") stop 1
+
+ real_4 = 0.00000018
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 0.1800000E-06:") stop 2
+
+ real_4 = 18000000.4
+ write(buffer, fmt) ':',real_4,':'
+ print *,buffer
+ if (buffer.ne.": 0.1800000E+08:") stop 3
+
+ real_8 = 4.18
+ write(buffer, fmt) ':',real_8,':'
+ print *,buffer
+ len = len_trim(buffer)
+ if (len /= 27) stop 4
+
+ real_16 = 4.18
+ write(buffer, fmt) ':',real_16,':'
+ print *,buffer
+ len = len_trim(buffer)
+ if (len /= 44) stop 5
+end
diff --git a/gcc/testsuite/gfortran.dg/fmt_g_default_field_width_3.f90 b/gcc/testsuite/gfortran.dg/fmt_g_default_field_width_3.f90
new file mode 100644
index 0000000..3db4fdd
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_g_default_field_width_3.f90
@@ -0,0 +1,33 @@
+! { dg-do compile }
+! { dg-options "-fdec -fno-dec-format-defaults" }
+!
+! Test case for the default field widths not enabled.
+!
+! Test case added by Mark Eggleston <mark.eggleston@codethink.com> to check
+! use of -fno-dec-format-defaults
+!
+
+program test
+ character(50) :: buffer
+
+ real(4) :: real_4
+ real(8) :: real_8
+ real(16) :: real_16
+ integer :: len
+ character(*), parameter :: fmt = "(A, G, A)"
+
+ real_4 = 4.18
+ write(buffer, fmt) ':',real_4,':' ! { dg-error "Positive width required" }
+
+ real_4 = 0.00000018
+ write(buffer, fmt) ':',real_4,':' ! { dg-error "Positive width required" }
+
+ real_4 = 18000000.4
+ write(buffer, fmt) ':',real_4,':' ! { dg-error "Positive width required" }
+
+ real_8 = 4.18
+ write(buffer, fmt) ':',real_8,':' ! { dg-error "Positive width required" }
+
+ real_16 = 4.18
+ write(buffer, fmt) ':',real_16,':' ! { dg-error "Positive width required" }
+end
diff --git a/gcc/testsuite/gfortran.dg/fmt_i_default_field_width_1.f90 b/gcc/testsuite/gfortran.dg/fmt_i_default_field_width_1.f90
new file mode 100644
index 0000000..bb539ad
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_i_default_field_width_1.f90
@@ -0,0 +1,40 @@
+! { dg-do run }
+! { dg-options -fdec }
+!
+! Test case for the default field widths enabled by the -fdec-format-defaults flag.
+!
+! This feature is not part of any Fortran standard, but it is supported by the
+! Oracle Fortran compiler and others.
+
+program test
+ character(50) :: buffer
+ character(1) :: colon
+
+ integer(2) :: integer_2
+ integer(4) :: integer_4
+ integer(8) :: integer_8
+ character(*), parameter :: fmt = "(A, I, A)"
+
+ write(buffer, fmt) ':',12340,':'
+ print *,buffer
+ if (buffer.ne.": 12340:") stop 1
+
+ read(buffer, "(1A, I, 1A)") colon, integer_4, colon
+ if ((integer_4.ne.12340).or.(colon.ne.":")) stop 2
+
+ integer_2 = -99
+ write(buffer, fmt) ':',integer_2,':'
+ print *,buffer
+ if (buffer.ne.": -99:") stop 3
+
+ integer_8 = -11112222
+ write(buffer, fmt) ':',integer_8,':'
+ print *,buffer
+ if (buffer.ne.": -11112222:") stop 4
+
+! If the width is 7 and there are 7 leading zeroes, the result should be zero.
+ integer_2 = 789
+ buffer = '0000000789'
+ read(buffer, '(I)') integer_2
+ if (integer_2.ne.0) stop 5
+end
diff --git a/gcc/testsuite/gfortran.dg/fmt_i_default_field_width_2.f90 b/gcc/testsuite/gfortran.dg/fmt_i_default_field_width_2.f90
new file mode 100644
index 0000000..1583c23
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_i_default_field_width_2.f90
@@ -0,0 +1,44 @@
+! { dg-do run }
+! { dg-options -fdec-format-defaults }
+!
+! Test case for the default field widths enabled by the -fdec-format-defaults flag.
+!
+! This feature is not part of any Fortran standard, but it is supported by the
+! Oracle Fortran compiler and others.
+!
+! Test case added by Mark Eggleston <mark.eggleston@codethink.com> to check
+! use of -fdec-format-defaults
+!
+
+program test
+ character(50) :: buffer
+ character(1) :: colon
+
+ integer(2) :: integer_2
+ integer(4) :: integer_4
+ integer(8) :: integer_8
+ character(*), parameter :: fmt = "(A, I, A)"
+
+ write(buffer, fmt) ':',12340,':'
+ print *,buffer
+ if (buffer.ne.": 12340:") stop 1
+
+ read(buffer, '(A1, I, A1)') colon, integer_4, colon
+ if ((integer_4.ne.12340).or.(colon.ne.":")) stop 2
+
+ integer_2 = -99
+ write(buffer, fmt) ':',integer_2,':'
+ print *,buffer
+ if (buffer.ne.": -99:") stop 3
+
+ integer_8 = -11112222
+ write(buffer, fmt) ':',integer_8,':'
+ print *,buffer
+ if (buffer.ne.": -11112222:") stop 4
+
+! If the width is 7 and there are 7 leading zeroes, the result should be zero.
+ integer_2 = 789
+ buffer = '0000000789'
+ read(buffer, '(I)') integer_2
+ if (integer_2.ne.0) stop 5
+end
diff --git a/gcc/testsuite/gfortran.dg/fmt_i_default_field_width_3.f90 b/gcc/testsuite/gfortran.dg/fmt_i_default_field_width_3.f90
new file mode 100644
index 0000000..325190d
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_i_default_field_width_3.f90
@@ -0,0 +1,37 @@
+! { dg-do compile }
+! { dg-options "-fdec -fno-dec-format-defaults" }
+!
+! Test case for the default field widths enabled by the -fdec-format-defaults flag.
+!
+! This feature is not part of any Fortran standard, but it is supported by the
+! Oracle Fortran compiler and others.
+!
+! Test case added by Mark Eggleston <mark.eggleston@codethink.com> to check
+! use of -fdec-format-defaults
+!
+
+program test
+ character(50) :: buffer
+ character(1) :: colon
+
+ integer(2) :: integer_2
+ integer(4) :: integer_4
+ integer(8) :: integer_8
+ character(*), parameter :: fmt = "(A, I, A)"
+
+ write(buffer, fmt) ':',12340,':' ! { dg-error "Nonnegative width required" }
+
+ read(buffer, '(A1, I, A1)') colon, integer_4, colon ! { dg-error "Nonnegative width required" }
+ if (integer_4.ne.12340) stop 2
+
+ integer_2 = -99
+ write(buffer, fmt) ':',integer_2,':' ! { dg-error "Nonnegative width required" }
+
+ integer_8 = -11112222
+ write(buffer, fmt) ':',integer_8,':' ! { dg-error "Nonnegative width required" }
+
+! If the width is 7 and there are 7 leading zeroes, the result should be zero.
+ integer_2 = 789
+ buffer = '0000000789'
+ read(buffer, '(I)') integer_2 ! { dg-error "Nonnegative width required" }
+end
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