* src/abg-ir.h (class function_type): Forward decl prior to class
function_decl.
(function_decl::parameter): Pass string by const reference. Add a
variadic marker member and initialize it.
(function_decl::parameter::get_type): Add a non-const overload.
(function_decl::parameter::get_variadic_marker): New getter.
(function_decl::function_decl) Take a const reference to a vector
for parameters, type size/alignment. Add two overloads that takes a
pointer to function_type.
(function_decl::get_parameters): Move this out-of-line.
(function_decl::append_parameter(s)): Renamed
function_decl::add_parameter(s) into these. Move it out-of-line.
Add an overload.
(function_decl::{get_type, set_type}): New declaration.
(function_decl::get_return_type): Move this out-of-line.
(function_decl::is_variadic): New in-line function.
(function_decl::m_type): New data member.
(function_decl::{m_parms, m_return_type}): Remove. This are now
carried by function_decl::m_type.
(class function_type, struct function_type_hash): New
declarations.
(member_function::member_function): Take a vector of pointers to
parameters. Take size/align of the type of the member function.
Adjust initialization.
* src/abg-ir.cc (dynamic_type_hash): Hash instance of
function_type accessed through a pointer.
(function_type::{operator==, ~function_type})
(function_type_hash::operaror(), function_decl::{get_return_type,
}, function_decl::parameter:#️⃣:operator()): New definitions.
(function_decl::function_decl): The out-of-line definitions of the
declarations above.
(function_decl::append_parameter): Moved this out-of-line from
inline function_decl::add_parameter. Make this rely on the
underlying m_type.
(function_decl::operator==): Adjust for use of vector for the
parameters. Also, there is no need anymore to compare the
parameters or the return types as they are compared by the
comparison of the function types.
* src/abg-reader.cc (build_function_decl): Read the new size/alignment
attributes on the function-decl element. Build a function_type
and use it to build the function_decl. Parameters and return type
are now hung off of the function_type.
(handle_function_decl): use build_function_decl.
* src/abg-writer.cc (write_function_decl): Write the new
size/alignment properties of the function-decl element. Adjust
for the use of vectors for function parameters now.
* tests/data/test-read-write/test10.xml: Adjust for the presence
of size/alignment properties in the function-decl element now.
* tests/data/test-read-write/test11.xml: Likewise.
* tests/data/test-read-write/test12.xml: Likewise.
* tests/data/test-read-write/test13.xml: Likewise.
* tests/data/test-read-write/test14.xml: Likewise.
* tests/data/test-read-write/test9.xml: Likewise.
