Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-09 20:33:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

c++: variants: fuse declarations and definitions

Browse Source 
We used to create a short definition of yy::parser with all the
implementations of its member functions outside.  But yy::parser is no
longer short and simple to read.  Maintaining each function twice is
painful: a lot of redundancy but different indentation levels, output
which depends on whether we are in a header or not (see
d132c2d545), etc.

Let's simplify this and put the implementations into the class
definition itself.

Discussed in this monologue:
https://lists.gnu.org/archive/html/bison-patches/2018-12/msg00058.html.

* data/skeletons/c++.m4, data/skeletons/lalr1.cc,
* data/skeletons/variant.hh (b4_basic_symbol_constructor_define)
(_b4_token_constructor_declare, b4_token_constructor_declare)
Merge into...
(b4_basic_symbol_constructor_define, _b4_token_constructor_define)
(b4_token_constructor_define): these.
This commit is contained in:
Akim Demaille
2018-12-26 09:04:07 +01:00
parent 50285ff066
commit 5fb0d276b3
3 changed files with 82 additions and 154 deletions
Download Patch File Download Diff File Expand all files Collapse all files

211
data/skeletons/variant.hh
View File

@@ -87,7 +87,7 @@ m4_define([b4_variant_includes],
# b4_value_type_declare
# ---------------------
# Declare semantic_type.
# Define semantic_type.
m4_define([b4_value_type_declare],
[[ /// A buffer to store and retrieve objects.
///
@@ -345,49 +345,78 @@ m4_define([_b4_includes_tokens],
[m4_map([_b4_is_token], [$@])])
# _b4_token_maker_declare(SYMBOL-NUM)
# -----------------------------------
# _b4_token_maker_define(SYMBOL-NUM)
# ----------------------------------
# Declare make_SYMBOL for SYMBOL-NUM. Use at class-level.
m4_define([_b4_token_maker_declare],
m4_define([_b4_token_maker_define],
[b4_token_visible_if([$1],
[#if 201103L <= YY_CPLUSPLUS
static
symbol_type
make_[]_b4_symbol([$1], [id]) (b4_join(
b4_symbol_if([$1], [has_type],
[b4_symbol([$1], [type]) v]),
b4_locations_if([location_type l])));
static
symbol_type
make_[]_b4_symbol([$1], [id]) (b4_join(
b4_symbol_if([$1], [has_type],
[b4_symbol([$1], [type]) v]),
b4_locations_if([location_type l])))
{
return symbol_type (b4_join([token::b4_symbol([$1], [id])],
b4_symbol_if([$1], [has_type], [std::move (v)]),
b4_locations_if([std::move (l)])));
}
#else
static
symbol_type
make_[]_b4_symbol([$1], [id]) (b4_join(
b4_symbol_if([$1], [has_type],
[const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l])));
static
symbol_type
make_[]_b4_symbol([$1], [id]) (b4_join(
b4_symbol_if([$1], [has_type],
[const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l])))
{
return symbol_type (b4_join([token::b4_symbol([$1], [id])],
b4_symbol_if([$1], [has_type], [v]),
b4_locations_if([l])));
}
#endif
])])
# _b4_token_constructor_declare(SYMBOL-NUM...)
# --------------------------------------------
# Declare a unique make_symbol for all the SYMBOL-NUM (they
m4_define([_b4_type_clause],
[b4_symbol_if([$1], [is_token],
[b4_symbol_if([$1], [has_id],
[tok == token::b4_symbol([$1], [id])],
[tok == b4_symbol([$1], [user_number])])])])
# _b4_token_constructor_define(SYMBOL-NUM...)
# -------------------------------------------
# Define a unique make_symbol for all the SYMBOL-NUM (they
# have the same type). Use at class-level.
m4_define([_b4_token_constructor_declare],
m4_define([_b4_token_constructor_define],
[m4_ifval(_b4_includes_tokens($@),
[#if 201103L <= YY_CPLUSPLUS
symbol_type (b4_join(
[int tok],
b4_symbol_if([$1], [has_type],
[b4_symbol([$1], [type]) v]),
b4_locations_if([location_type l])));
[[#if 201103L <= YY_CPLUSPLUS
symbol_type (]b4_join(
[int tok],
b4_symbol_if([$1], [has_type],
[b4_symbol([$1], [type]) v]),
b4_locations_if([location_type l]))[)
: super_type(]b4_join([token_type (tok)],
b4_symbol_if([$1], [has_type], [std::move (v)]),
b4_locations_if([std::move (l)]))[)
{
YYASSERT (]m4_join([ || ], m4_map_sep([_b4_type_clause], [, ], [$@]))[);
}
#else
symbol_type (b4_join(
[int tok],
b4_symbol_if([$1], [has_type],
[const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l])));
symbol_type (]b4_join(
[int tok],
b4_symbol_if([$1], [has_type],
[const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l]))[)
: super_type(]b4_join([token_type (tok)],
b4_symbol_if([$1], [has_type], [v]),
b4_locations_if([l]))[)
{
YYASSERT (]m4_join([ || ], m4_map_sep([_b4_type_clause], [, ], [$@]))[);
}
#endif
])])
]])])
# b4_token_constructor_declare
@@ -399,123 +428,28 @@ b4_symbol_foreach([_b4_token_maker_declare])])
# _b4_token_maker_define(SYMBOL-NUM)
# ----------------------------------
# Define make_SYMBOL for SYMBOL-NUM.
m4_define([_b4_token_maker_define],
[b4_token_visible_if([$1],
[#if 201103L <= YY_CPLUSPLUS
inline
b4_parser_class_name::symbol_type
b4_parser_class_name::make_[]_b4_symbol([$1], [id]) (b4_join(
b4_symbol_if([$1], [has_type],
[b4_symbol([$1], [type]) v]),
b4_locations_if([location_type l])))
{
return symbol_type (b4_join([token::b4_symbol([$1], [id])],
b4_symbol_if([$1], [has_type], [std::move (v)]),
b4_locations_if([std::move (l)])));
}
#else
inline
b4_parser_class_name::symbol_type
b4_parser_class_name::make_[]_b4_symbol([$1], [id]) (b4_join(
b4_symbol_if([$1], [has_type],
[const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l])))
{
return symbol_type (b4_join([token::b4_symbol([$1], [id])],
b4_symbol_if([$1], [has_type], [v]),
b4_locations_if([l])));
}
#endif
])])
# _b4_token_constructor_define(SYMBOL-NUM...)
# -------------------------------------------
# Declare a unique make_symbol for all the SYMBOL-NUM (they
# have the same type). Use at class-level.
m4_define([_b4_type_clause],
[b4_symbol_if([$1], [is_token],
[b4_symbol_if([$1], [has_id],
[tok == token::b4_symbol([$1], [id])],
[tok == b4_symbol([$1], [user_number])])])])
m4_define([_b4_token_constructor_define],
[m4_ifval(_b4_includes_tokens($@),
[[#if 201103L <= YY_CPLUSPLUS
inline
]b4_parser_class_name[::symbol_type::symbol_type (]b4_join(
[int tok],
b4_symbol_if([$1], [has_type],
[b4_symbol([$1], [type]) v]),
b4_locations_if([location_type l]))[)
: super_type(]b4_join([token_type (tok)],
b4_symbol_if([$1], [has_type], [std::move (v)]),
b4_locations_if([std::move (l)]))[)
{
YYASSERT (]m4_join([ || ], m4_map_sep([_b4_type_clause], [, ], [$@]))[);
}
#else
inline
]b4_parser_class_name[::symbol_type::symbol_type (]b4_join(
[int tok],
b4_symbol_if([$1], [has_type],
[const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l]))[)
: super_type(]b4_join([token_type (tok)],
b4_symbol_if([$1], [has_type], [v]),
b4_locations_if([l]))[)
{
YYASSERT (]m4_join([ || ], m4_map_sep([_b4_type_clause], [, ], [$@]))[);
}
#endif
]])])
# b4_basic_symbol_constructor_declare(SYMBOL-NUM)
# -----------------------------------------------
# Generate a constructor declaration for basic_symbol from given type.
m4_define([b4_basic_symbol_constructor_declare],
[[#if 201103L <= YY_CPLUSPLUS
basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], [b4_symbol([$1], [type])&& v]),
b4_locations_if([location_type&& l]))[);
#else
basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], [const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l]))[);
#endif
]])
# b4_basic_symbol_constructor_define(SYMBOL-NUM)
# ----------------------------------------------
# Generate a constructor implementation for basic_symbol from given type.
# Generate a constructor for basic_symbol from given type.
m4_define([b4_basic_symbol_constructor_define],
[[#if 201103L <= YY_CPLUSPLUS
template <typename Base>
]b4_parser_class_name[::basic_symbol<Base>::basic_symbol (]b4_join(
basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], [b4_symbol([$1], [type])&& v]),
b4_locations_if([location_type&& l]))[)
: Base (t)]b4_symbol_if([$1], [has_type], [
, value (std::move (v))])[]b4_locations_if([
, location (std::move (l))])[
{}
: Base (t)]b4_symbol_if([$1], [has_type], [
, value (std::move (v))])[]b4_locations_if([
, location (std::move (l))])[
{}
#else
template <typename Base>
]b4_parser_class_name[::basic_symbol<Base>::basic_symbol (]b4_join(
basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], [const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l]))[)
: Base (t)]b4_symbol_if([$1], [has_type], [
, value (v)])[]b4_locations_if([
, location (l)])[
{}
: Base (t)]b4_symbol_if([$1], [has_type], [
, value (v)])[]b4_locations_if([
, location (l)])[
{}
#endif
]])
@@ -525,5 +459,4 @@ m4_define([b4_basic_symbol_constructor_define],
# Define the overloaded versions of make_symbol for all the value types.
m4_define([b4_token_constructor_define],
[ // Implementation of make_symbol for each symbol type.
b4_type_foreach([_b4_token_constructor_define])
b4_symbol_foreach([_b4_token_maker_define])])