From: Steven G. Kargl <kargl@gcc.gnu.org>
Date: Mon, 12 Mar 2018 18:26:28 +0000 (+0000)
Subject: re PR fortran/83939 (Constraint C1290 (elemental function cannot be allocatable)... 
X-Git-Tag: releases/gcc-6.5.0~447
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=851b57408b2d08f734eec70a988be5e5da6fbfee;p=thirdparty%2Fgcc.git

re PR fortran/83939 (Constraint C1290 (elemental function cannot be allocatable) not enforced)

2018-03-12  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/83939
	* resolve.c (resolve_fl_procedure): Enforce F2018:C15100.

2018-03-12  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/83939
	* gfortran.dg/pr83939.f90

From-SVN: r258457
---

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 840b0b0c21da..433d66b4ee16 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,8 @@
+2018-03-12  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/83939
+	* resolve.c (resolve_fl_procedure): Enforce F2018:C15100.
+
 2018-03-10  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/84734
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index d2d1b5835356..99ee31efeeb2 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -11958,6 +11958,19 @@ resolve_fl_procedure (gfc_symbol *sym, int mp_flag)
 	}
     }
 
+  /* F2018, C15100: "The result of an elemental function shall be scalar,
+     and shall not have the POINTER or ALLOCATABLE attribute."  The scalar
+     pointer is tested and caught elsewhere.  */
+  if (sym->attr.elemental && sym->result
+      && (sym->result->attr.allocatable || sym->result->attr.pointer))
+    {
+      gfc_error ("Function result variable %qs at %L of elemental "
+		 "function %qs shall not have an ALLOCATABLE or POINTER "
+		 "attribute", sym->result->name,
+		 &sym->result->declared_at, sym->name);
+      return false;
+    }
+
   if (sym->attr.is_bind_c && sym->attr.is_c_interop != 1)
     {
       gfc_formal_arglist *curr_arg;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index baaf4088e38a..d29d0a61c4e4 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-03-12  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/83939
+	* gfortran.dg/pr83939.f90
+
 2018-03-10  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/84734
diff --git a/gcc/testsuite/gfortran.dg/pr83939.f90 b/gcc/testsuite/gfortran.dg/pr83939.f90
new file mode 100644
index 000000000000..dfeaac71630c
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr83939.f90
@@ -0,0 +1,12 @@
+! { dg-do compile }
+elemental function f() result(s) ! { dg-error "shall not have an ALLOCATABLE or POINTER" }
+  allocatable s
+  allocate(s)
+  s = 3.5
+end function
+
+elemental function g() result(s) ! { dg-error "shall not have an ALLOCATABLE or POINTER" }
+  pointer s
+  allocate(s)
+  s = 3.5
+end function