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From 5d5a6c9d8c5a8db252d972ec32dd70d2510404fb Mon Sep 17 00:00:00 2001
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From: Jim MacArthur <jim.macarthur@codethink.co.uk>
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Date: Thu, 4 Feb 2016 16:00:30 +0000
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Subject: [PATCH 12/23] Allow old-style initializers in derived types
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This allows simple declarations in derived types and structures, such as:
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LOGICAL*1 NIL /0/
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Only single value expressions are allowed at the moment.
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This feature is enabled by the `-std=extra-legacy` compiler flag.
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---
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commit a9ee9b2c45580d0e52670cec4d3d68095dabc178
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Author: Jim MacArthur <jim.macarthur@codethink.co.uk>
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Date: Thu Feb 4 16:00:30 2016 +0000
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Allow old-style initializers in derived types
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This allows simple declarations in derived types and structures, such as:
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LOGICAL*1 NIL /0/
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Only single value expressions are allowed at the moment.
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This feature is enabled by the `-std=extra-legacy` compiler flag.
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Test written by: Francisco Redondo Marchena <francisco.marchena@codethink.co.uk>
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diff --git a/gcc/fortran/decl.c b/gcc/fortran/decl.c
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index c90f9de5a78..3ad9c2c8b40 100644
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--- a/gcc/fortran/decl.c
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+++ b/gcc/fortran/decl.c
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@@ -2437,12 +2437,30 @@ variable_decl (int elem)
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but not components of derived types. */
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else if (gfc_current_state () == COMP_DERIVED)
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{
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- gfc_error ("Invalid old style initialization for derived type "
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- "component at %C");
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- m = MATCH_ERROR;
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- goto cleanup;
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- }
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+ if (gfc_option.allow_std & GFC_STD_EXTRA_LEGACY)
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+ {
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+ /* Attempt to match an old-style initializer which is a simple
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+ integer or character expression; this will not work with
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+ multiple values. */
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+ m = gfc_match_init_expr (&initializer);
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+ if (m == MATCH_ERROR)
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+ goto cleanup;
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+ else if (m == MATCH_YES)
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+ {
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+ m = gfc_match ("/");
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+ if (m != MATCH_YES)
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+ goto cleanup;
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+ }
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+ }
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+ else
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+ {
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+ gfc_error ("Invalid old style initialization for derived type "
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+ "component at %C");
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+ m = MATCH_ERROR;
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+ goto cleanup;
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+ }
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+ }
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/* For structure components, read the initializer as a special
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expression and let the rest of this function apply the initializer
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as usual. */
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diff --git a/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style.f b/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style.f
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new file mode 100644
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index 00000000000..eac7de987e8
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--- /dev/null
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+++ b/gcc/testsuite/gfortran.dg/dec_derived_types_initialised_old_style.f
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@@ -0,0 +1,22 @@
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+! { dg-do compile }
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+! { dg-options "-std=extra-legacy" }
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+!
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+! Test old style initializers in derived types
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+!
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+ PROGRAM spec_in_var
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+ TYPE STRUCT1
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+ INTEGER*4 ID /8/
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+ INTEGER*4 TYPE /5/
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+ INTEGER*8 DEFVAL /0/
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+ CHARACTER*(5) NAME /'tests'/
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+ LOGICAL*1 NIL /0/
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+ END TYPE STRUCT1
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+
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+ TYPE (STRUCT1) SINST
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+
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+ if(SINST%ID.NE.8) STOP 1
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+ if(SINST%TYPE.NE.5) STOP 2
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+ if(SINST%DEFVAL.NE.0) STOP 3
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+ if(SINST%NAME.NE.'tests') STOP 4
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+ if(SINST%NIL) STOP 5
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+ END
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