[XEN PATCH 03/10] automation/eclair_analysis: deviate macro count_args_ for MISRA Rule 20.7

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

The count_args_ macro violates Rule 20.7, but it can't be made
compliant with Rule 20.7 without breaking its functionality. Since
it's very unlikely for this macro to be misused, it is deviated.

No functional change.

Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
---
 automation/eclair_analysis/ECLAIR/deviations.ecl | 6 ++++++
 docs/misra/deviations.rst                        | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/automation/eclair_analysis/ECLAIR/deviations.ecl 
b/automation/eclair_analysis/ECLAIR/deviations.ecl
index d21f112a9b94..c17e2f5a0886 100644
--- a/automation/eclair_analysis/ECLAIR/deviations.ecl
+++ b/automation/eclair_analysis/ECLAIR/deviations.ecl
@@ -445,6 +445,12 @@ not to parenthesize their arguments."
 -config=MC3R1.R20.7,reports+={safe, 
"any_area(any_loc(any_exp(macro(^alternative_(v)?call[0-9]$))))"}
 -doc_end
 
+-doc_begin="The argument 'x' of the count_args_ macro can't be parenthesized as
+the rule would require, without breaking the functionality of the macro. The 
uses
+of this macro do not lead to developer confusion, and can thus be deviated."
+-config=MC3R1.R20.7,reports+={safe, 
"any_area(any_loc(any_exp(macro(^count_args_$))))"}
+-doc_end
+
 -doc_begin="Uses of variadic macros that have one of their arguments defined as
 a macro and used within the body for both ordinary parameter expansion and as 
an
 operand to the # or ## operators have a behavior that is well-understood and
diff --git a/docs/misra/deviations.rst b/docs/misra/deviations.rst
index ed0c1e8ed0bf..e228ae2e715f 100644
--- a/docs/misra/deviations.rst
+++ b/docs/misra/deviations.rst
@@ -371,6 +371,12 @@ Deviations related to MISRA C:2012 Rules:
        sanity checks in place.
      - Tagged as `safe` for ECLAIR.
 
+   * - R20.7
+     - The macro `count_args_` is not compliant with the rule, but is not 
likely
+       to incur in the risk of being misused or lead to developer confusion, 
and
+       refactoring it to add parentheses breaks its functionality.
+     - Tagged as `safe` for ECLAIR.
+
    * - R20.12
      - Variadic macros that use token pasting often employ the gcc extension
        `ext_paste_comma`, as detailed in `C-language-toolchain.rst`, which is
-- 
2.34.1