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From 8bcc0f85ed1718c0dd9033ad4a34df181aabaffe Mon Sep 17 00:00:00 2001
From: Mark Eggleston <markeggleston@gcc.gnu.org>
Date: Fri, 22 Jan 2021 13:11:06 +0000
Subject: [PATCH 05/10] Allow old-style initializers in derived types
This allows simple declarations in derived types and structures, such as:
LOGICAL*1 NIL /0/
Only single value expressions are allowed at the moment.
Use -fdec-old-init to enable. Also enabled by -fdec.
---
gcc/fortran/decl.c | 27 +++++++++++++++----
gcc/fortran/lang.opt | 4 +++
gcc/fortran/options.c | 1 +
...ec_derived_types_initialised_old_style_1.f | 25 +++++++++++++++++
...ec_derived_types_initialised_old_style_2.f | 25 +++++++++++++++++
...ec_derived_types_initialised_old_style_3.f | 26 ++++++++++++++++++
6 files changed, 103 insertions(+), 5 deletions(-)
create mode 100644 gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_1.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_2.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_3.f
diff --git a/gcc/fortran/decl.c b/gcc/fortran/decl.c
index 723915822f3..5c8c1b7981b 100644
--- a/gcc/fortran/decl.c
+++ b/gcc/fortran/decl.c
@@ -2827,12 +2827,29 @@ variable_decl (int elem)
but not components of derived types. */
else if (gfc_current_state () == COMP_DERIVED)
{
- gfc_error ("Invalid old style initialization for derived type "
- "component at %C");
- m = MATCH_ERROR;
- goto cleanup;
+ if (flag_dec_old_init)
+ {
+ /* Attempt to match an old-style initializer which is a simple
+ integer or character expression; this will not work with
+ multiple values. */
+ m = gfc_match_init_expr (&initializer);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ else if (m == MATCH_YES)
+ {
+ m = gfc_match ("/");
+ if (m != MATCH_YES)
+ goto cleanup;
+ }
+ }
+ else
+ {
+ gfc_error ("Invalid old style initialization for derived type "
+ "component at %C");
+ m = MATCH_ERROR;
+ goto cleanup;
+ }
}
-
/* For structure components, read the initializer as a special
expression and let the rest of this function apply the initializer
as usual. */
diff --git a/gcc/fortran/lang.opt b/gcc/fortran/lang.opt
index d527c106bd6..25cc948699b 100644
--- a/gcc/fortran/lang.opt
+++ b/gcc/fortran/lang.opt
@@ -493,6 +493,10 @@ fdec-non-integer-index
Fortran Var(flag_dec_non_integer_index)
Enable support for non-integer substring indexes.
+fdec-old-init
+Fortran Var(flag_dec_old_init)
+Enable support for old style initializers in derived types.
+
fdec-structure
Fortran Var(flag_dec_structure)
Enable support for DEC STRUCTURE/RECORD.
diff --git a/gcc/fortran/options.c b/gcc/fortran/options.c
index 9a042f64881..d6bd36c3a8a 100644
--- a/gcc/fortran/options.c
+++ b/gcc/fortran/options.c
@@ -79,6 +79,7 @@ set_dec_flags (int value)
SET_BITFLAG (flag_dec_char_conversions, value, value);
SET_BITFLAG (flag_dec_duplicates, value, value);
SET_BITFLAG (flag_dec_non_integer_index, value, value);
+ SET_BITFLAG (flag_dec_old_init, value, value);
}
/* Finalize DEC flags. */
diff --git a/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_1.f b/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_1.f
new file mode 100644
index 00000000000..eac4f9bfcf1
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_1.f
@@ -0,0 +1,25 @@
+! { dg-do run }
+! { dg-options "-fdec" }
+!
+! Test old style initializers in derived types
+!
+! Contributed by Jim MacArthur <jim.macarthur@codethink.co.uk>
+! Modified by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ PROGRAM spec_in_var
+ TYPE STRUCT1
+ INTEGER*4 ID /8/
+ INTEGER*4 TYPE /5/
+ INTEGER*8 DEFVAL /0/
+ CHARACTER*(5) NAME /'tests'/
+ LOGICAL*1 NIL /0/
+ END TYPE STRUCT1
+
+ TYPE (STRUCT1) SINST
+
+ IF(SINST%ID.NE.8) STOP 1
+ IF(SINST%TYPE.NE.5) STOP 2
+ IF(SINST%DEFVAL.NE.0) STOP 3
+ IF(SINST%NAME.NE.'tests') STOP 4
+ IF(SINST%NIL) STOP 5
+ END
diff --git a/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_2.f b/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_2.f
new file mode 100644
index 00000000000..d904c8b2974
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_2.f
@@ -0,0 +1,25 @@
+! { dg-do run }
+! { dg-options "-std=legacy -fdec-old-init" }
+!
+! Test old style initializers in derived types
+!
+! Contributed by Jim MacArthur <jim.macarthur@codethink.co.uk>
+! Modified by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ PROGRAM spec_in_var
+ TYPE STRUCT1
+ INTEGER*4 ID /8/
+ INTEGER*4 TYPE /5/
+ INTEGER*8 DEFVAL /0/
+ CHARACTER*(5) NAME /'tests'/
+ LOGICAL*1 NIL /0/
+ END TYPE STRUCT1
+
+ TYPE (STRUCT1) SINST
+
+ IF(SINST%ID.NE.8) STOP 1
+ IF(SINST%TYPE.NE.5) STOP 2
+ IF(SINST%DEFVAL.NE.0) STOP 3
+ IF(SINST%NAME.NE.'tests') STOP 4
+ IF(SINST%NIL) STOP 5
+ END
diff --git a/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_3.f b/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_3.f
new file mode 100644
index 00000000000..58c2b4b66cf
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style_3.f
@@ -0,0 +1,26 @@
+! { dg-do compile }
+! { dg-options "-std=legacy -fdec -fno-dec-old-init" }
+!
+! Test old style initializers in derived types
+!
+! Contributed by Jim MacArthur <jim.macarthur@codethink.co.uk>
+! Modified by Mark Eggleston <mark.eggleston@codethink.com>
+!
+
+ PROGRAM spec_in_var
+ TYPE STRUCT1
+ INTEGER*4 ID /8/ ! { dg-error "Invalid old style initialization" }
+ INTEGER*4 TYPE /5/ ! { dg-error "Invalid old style initialization" }
+ INTEGER*8 DEFVAL /0/ ! { dg-error "Invalid old style initialization" }
+ CHARACTER*(5) NAME /'tests'/ ! { dg-error "Invalid old style initialization" }
+ LOGICAL*1 NIL /0/ ! { dg-error "Invalid old style initialization" }
+ END TYPE STRUCT1
+
+ TYPE (STRUCT1) SINST
+
+ IF(SINST%ID.NE.8) STOP 1 ! { dg-error "'id' at \\(1\\) is not a member" }
+ IF(SINST%TYPE.NE.5) STOP 2 ! { dg-error "'type' at \\(1\\) is not a member" }
+ IF(SINST%DEFVAL.NE.0) STOP 3 ! { dg-error "'defval' at \\(1\\) is not a member" }
+ IF(SINST%NAME.NE.'tests') STOP 4 ! { dg-error "'name' at \\(1\\) is not a member" }
+ IF(SINST%NIL) STOP 5 ! { dg-error "'nil' at \\(1\\) is not a member" }
+ END
--
2.27.0
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