143 lines
4.8 KiB
C++
143 lines
4.8 KiB
C++
/** @file DExpectQLiteralSsm.hpp
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*
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* @author Roland Conybeare, Mar 2026
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**/
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#pragma once
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#include "DSyntaxStateMachine.hpp"
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//#include <xo/object2/DArray.hpp>
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//#include <xo/arena/DArena.hpp>
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namespace xo {
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namespace scm {
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#ifdef NOT_USING
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/**
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* Already in quoted-literal context
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*
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* #q{ }
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* ^
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* qliteral_0
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*
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* qliteral_0 --on_leftparen_token()--> push QuotedListSsm
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**/
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enum class formalarglstatetype {
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invalid = -1,
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argl_0,
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argl_1a,
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argl_1b,
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n_formalarglstatetype,
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};
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extern const char *
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formalarglstatetype_descr(formalarglstatetype x);
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inline std::ostream &
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operator<< (std::ostream & os, formalarglstatetype x) {
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os << formalarglstatetype_descr(x);
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return os;
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}
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#endif
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/** @class expect_formal_arglist
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* @brief parser state-machine for a formal parameter list
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**/
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class DExpectQLiteralSsm : public DSyntaxStateMachine<DExpectQLiteralSsm> {
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public:
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using Super = DSyntaxStateMachine<DExpectQLiteralSsm>;
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using AAllocator = xo::mm::AAllocator;
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using DArena = xo::mm::DArena;
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using TypeDescr = xo::reflect::TypeDescr;
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using ppindentinfo = xo::print::ppindentinfo;
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using size_type = std::uint32_t;
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public:
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DExpectQLiteralSsm();
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/** create instance, using memory from @parser_mm **/
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static obj<ASyntaxStateMachine,DExpectQLiteralSsm> make(DArena & parser_mm);
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static DExpectQLiteralSsm * _make(DArena & parser_mm);
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/** start nested syntax for a quoted literal **/
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static void start(ParserStateMachine * p_psm);
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/** @defgroup scm-expectformalarglistssm-methods general methods **/
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///@{
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static const char * ssm_classname() { return "DExpectQLiteralSsm"; }
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/** update state for f64 token @p tk, with overall parser state in @p p_psm.
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* delegates to parent ssm via @ref on_quoted_literal
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**/
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void on_f64_token(const Token & tk,
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ParserStateMachine * p_psm);
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/** update state on incoming token @p tk, with overall parser state in @p p_psm **/
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void on_leftparen_token(const Token & tk,
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ParserStateMachine * p_psm);
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/** update state on incoming token @p tk, with overall parser state in @p p_psm **/
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void on_comma_token(const Token & tk,
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ParserStateMachine * p_psm);
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/** update state on incoming rightparen token @p tk, with overall parser state in @p p_psm **/
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void on_rightparen_token(const Token & tk,
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ParserStateMachine * p_psm);
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///@}
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/** @defgroup scm-expectformalarglistssm-ssm-facet syntaxstatemachine facet methods **/
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///@{
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/** identifies the ssm implemented here **/
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syntaxstatetype ssm_type() const noexcept;
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/** mnemonic for expected input (for this ssm) in current state **/
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std::string_view get_expect_str() const;
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/** update state on incoming token @p tk,
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* with overall parser state in @p p_psm
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**/
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void on_token(const Token & tk,
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ParserStateMachine * p_psm);
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///@}
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/** @defgroup scm-expectformalarglistssm-printable-facet printable facet methods **/
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///@{
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bool pretty(const ppindentinfo & ppii) const;
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///@}
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private:
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/** @defgroup scm-expectformalarglistssm-impl-methods **/
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///@{
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/** update local state to include parsed formal (param_name, param_type).
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* If stack memory needed, get from @p parser_alloc.
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* Lifetime until formal arglist completely parsed
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**/
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void _accept_formal(obj<AAllocator> expr_alloc,
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DArena & parser_alloc,
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const DUniqueString * param_name,
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TypeDescr param_type);
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///@}
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private:
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#ifdef NOT_USING
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/** parsing state-machine state **/
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formalarglstatetype fastate_ = formalarglstatetype::argl_0;
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/** populate with (parameter-name, parameter-type) list
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* as they're encountered.
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*
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* Not using flexible array here since we don't know size at construction time
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**/
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DArray * argl_ = nullptr;
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#endif
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};
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} /*namespace scm*/
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} /*namespace xo*/
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/* end DExpectQLiteralSsm.hpp */
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