roland/xo-alloc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

xo-reader2 xo-expresion2: work on define-expressions [WIP]

Browse source
This commit is contained in:
Roland Conybeare 2026-01-19 21:25:30 -05:00
commit 516b0932ee
40 changed files with 711 additions and 72 deletions
Download patch file Download diff file Expand all files Collapse all files

27
xo-reader2/include/xo/reader2/DDefineSsm.hpp
View file

@ -8,6 +8,8 @@
#include "ParserStateMachine.hpp"
//#include "SyntaxStateMachine.hpp"
#include "syntaxstatetype.hpp"
#include <xo/expression2/detail/IExpression_DDefineExpr.hpp>
#include <xo/expression2/DDefineExpr.hpp>
#include <xo/facet/obj.hpp>
namespace xo {
@ -69,21 +71,29 @@ namespace xo {
**/
class DDefineSsm {
public:
using AAllocator = xo::mm::AAllocator;
using DArena = xo::mm::DArena;
public:
/** @defgroup scm-define-ssm-facet constructors **/
///@{
DDefineSsm();
/** constructor; using @p def_expr for initial expression scaffold **/
explicit DDefineSsm(DDefineExpr * def_expr);
/** create instance using memory from @p parser_mm **/
static DDefineSsm * make(DArena & parser_mm);
/** create instance using memory from @p parser_mm.
* Initial expression scaffold @p def_expr
**/
static DDefineSsm * make(DArena & parser_mm,
DDefineExpr * def_expr);
/** start nested parser for a define-expression,
* on top of parser state machine @p p_psm
* Use @p parser_mm to allocate syntax state machines,
* and @p expr_mm to allocate expressions
**/
static void start(DArena & parser_mm,
obj<AAllocator> expr_mm,
ParserStateMachine * p_psm);
///@}
@ -98,6 +108,12 @@ namespace xo {
**/
std::string_view get_expect_str() const noexcept;
/** operate state machine for this syntax on incoming symbol-token @p tk
* with overall parser state in @p p_psm
**/
void on_symbol_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming token @p tk,
* overall parser state in @p p_psm
**/
@ -121,6 +137,11 @@ namespace xo {
private:
/** identify define-expression state **/
defexprstatetype defstate_;
/** scaffolded define-expression.
* This will eventually be the output of this ssm
**/
obj<AExpression,DDefineExpr> def_expr_;
};
} /*namespace scm*/
} /*namespace xo*/