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xo-reader2: + SyntaxStateMachine.forward_children method

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Support gc traversal with goal of making ParserStateMachine a gc root
This commit is contained in:
Roland Conybeare 2026-03-24 17:43:45 -04:00
commit 3af72fec64
91 changed files with 626 additions and 39 deletions
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8
include/xo/reader2/lambda/DLambdaSsm.hpp
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@ -59,6 +59,7 @@ namespace xo {
public:
using Super = DSyntaxStateMachine<DLambdaSsm>;
using DLocalSymtab = xo::scm::DLocalSymtab;
using ACollector = xo::mm::ACollector;
using AAllocator = xo::mm::AAllocator;
using DArena = xo::mm::DArena;
using TypeDescr = xo::reflect::TypeDescr;
@ -184,6 +185,13 @@ namespace xo {
bool pretty(const ppindentinfo & ppii) const;
///@}
/** @defgroup scm-lambdassm-gc-support gc support methods **/
///@{
/** gc support: visit gc-aware child pointers **/
void forward_children(obj<ACollector> gc) noexcept;
///@}
private:

3
include/xo/reader2/lambda/ISyntaxStateMachine_DLambdaSsm.hpp
View file

@ -42,6 +42,7 @@ namespace xo {
/** @defgroup scm-syntaxstatemachine-dlambdassm-type-traits **/
///@{
using TypeDescr = xo::scm::ASyntaxStateMachine::TypeDescr;
using ACollector = xo::scm::ASyntaxStateMachine::ACollector;
using AGCObject = xo::scm::ASyntaxStateMachine::AGCObject;
using Copaque = xo::scm::ASyntaxStateMachine::Copaque;
using Opaque = xo::scm::ASyntaxStateMachine::Opaque;
@ -75,6 +76,8 @@ namespace xo {
static void on_parsed_expression_with_token(DLambdaSsm & self, obj<AExpression> expr, const Token & tk, ParserStateMachine * p_psm);
/** update state machine for nested quoted literal @p lit **/
static void on_quoted_literal(DLambdaSsm & self, obj<AGCObject> lit, ParserStateMachine * p_psm);
/** gc support: move immediate children to to-space and sub forwarding pointer **/
static void forward_children(DLambdaSsm & self, obj<ACollector> gc);
///@}
};