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Introduce make_symbol.

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make_symbol provides a means to construct a full symbol (kind, value,
location) in a single shot.  It is meant to be a Symbol constructor,
parameterized by the symbol kind so that overloading would prevent
incorrect kind/value pairs.  Unfortunately parameterized constructors do
not work well in C++ (unless the parameter also appears as an argument,
which is not acceptable), hence the use of a function instead of a
constructor.

	* data/lalr1.cc (b4_symbol_constructor_declaration_)
	(b4_symbol_constructor_declarations)
	(b4_symbol_constructor_specialization_)
	(b4_symbol_constructor_specializations)
	(b4_symbol_constructor_definition_)
	(b4_symbol_constructor_definitions): New.
	Use them where appropriate to generate declaration, declaration of
	the specializations, and implementations of the templated
	overloaded function "make_symbol".
	(variant::variant): Always define a default ctor.
	Also provide a copy ctor.
	(symbol_base_type, symbol_type): New ctor overloads for value-less
	symbols.
	(symbol_type): Now public, so that functions such as yylex can use
	it.
This commit is contained in:
Akim Demaille
2008-08-18 15:48:36 +02:00
parent 8be046d7b8
commit 2873fdf8b1
2 changed files with 147 additions and 6 deletions
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27
ChangeLog
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@@ -1,3 +1,30 @@
2008-11-11 Akim Demaille <demaille@gostai.com>
Introduce make_symbol.
make_symbol provides a means to construct a full symbol (kind, value,
location) in a single shot. It is meant to be a Symbol constructor,
parameterized by the symbol kind so that overloading would prevent
incorrect kind/value pairs. Unfortunately parameterized constructors do
not work well in C++ (unless the parameter also appears as an argument,
which is not acceptable), hence the use of a function instead of a
constructor.
* data/lalr1.cc (b4_symbol_constructor_declaration_)
(b4_symbol_constructor_declarations)
(b4_symbol_constructor_specialization_)
(b4_symbol_constructor_specializations)
(b4_symbol_constructor_definition_)
(b4_symbol_constructor_definitions): New.
Use them where appropriate to generate declaration, declaration of
the specializations, and implementations of the templated
overloaded function "make_symbol".
(variant::variant): Always define a default ctor.
Also provide a copy ctor.
(symbol_base_type, symbol_type): New ctor overloads for value-less
symbols.
(symbol_type): Now public, so that functions such as yylex can use
it.
2008-11-11 Akim Demaille <demaille@gostai.com>
Inform m4 whether a tag is a valid id.