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xo-reader2: streamline DExpectSymbolSsm w/ DSyntaxStateMachine

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This commit is contained in:
Roland Conybeare 2026-01-30 13:38:43 -05:00
commit ff62b4e568
3 changed files with 14 additions and 280 deletions
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110
include/xo/reader2/DExpectSymbolSsm.hpp
View file

@ -5,8 +5,7 @@
#pragma once
#include "ParserStateMachine.hpp"
//#include "SyntaxStateMachine.hpp"
#include "DSyntaxStateMachine.hpp"
#include "syntaxstatetype.hpp"
#include <xo/indentlog/print/ppindentinfo.hpp>
#include <xo/facet/obj.hpp>
@ -19,8 +18,9 @@ namespace xo {
* For example:
* - lhs in a define-expression
**/
class DExpectSymbolSsm {
class DExpectSymbolSsm : public DSyntaxStateMachine<DExpectSymbolSsm> {
public:
using Super = DSyntaxStateMachine<DExpectSymbolSsm>;
using DArena = xo::mm::DArena;
using TypeDescr = xo::reflect::TypeDescr;
using ppindentinfo = xo::print::ppindentinfo;
@ -46,6 +46,8 @@ namespace xo {
static void on_symbol_token(const Token & tk,
ParserStateMachine * p_psm);
const char * ssm_classname() const noexcept { return "DExpectSymbolSsm"; }
/** @defgroup scm-expectsymbol-ssm-facet syntaxstatemachine facet methods **/
///@{
@ -57,114 +59,12 @@ namespace xo {
**/
std::string_view get_expect_str() const noexcept;
/** update state for this syntax after parsing a symbol @p sym;
* overall parser state in @p p_psm.
*
* NOTE:
* might not be obvious that this is unreachable.
* DExpectSymbolSsm converts a symbol token,
* and delivers it to parent ssm using this entry point.
* This method would only be called if consecutive
* DExpectSymbolSsm instances on parser stack;
* which scenario never occurs in Schematika syntax
**/
void on_parsed_symbol(std::string_view sym,
ParserStateMachine * p_psm);
/** update state for this syntax after parsing a type-description @p td
* in nested state machine.
* (provided to satisfy ASyntaxStateMachine api. not reachable)
**/
void on_parsed_typedescr(TypeDescr td,
ParserStateMachine * p_psm);
/** update state to consume param (name, value) emitted
* by nested ssm
**/
void on_parsed_formal(const DUniqueString * param_name,
TypeDescr param_type,
ParserStateMachine * p_psm);
/** consume formal params @p arglist from completed nested ssm,
* with overall parser state in @p p_psm.
**/
void on_parsed_formal_arglist(DArray * arglist,
ParserStateMachine * p_psm);
/** update state for this syntax after parsing an expression @p expr
* in nested state machine.
* (provided to satisfy ASyntaxStateMachine api. not reachable)
**/
void on_parsed_expression(obj<AExpression> expr,
ParserStateMachine * p_psm);
/** update state for this syntax after parsing an expression @p expr
* followed by semicolon in nested state machine.
* (provided to satisfy ASyntaxStateMachine api. not reachable)
**/
void on_parsed_expression_with_semicolon(obj<AExpression> expr,
ParserStateMachine * p_psm);
/** operate state machine for this syntax on incoming token @p tk
* with overall parser state in @p p_psm
**/
void on_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming token @p tk,
* overall parser state in @p p_psm.
**/
void on_def_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming token @p tk,
* overall parser state in @p p_psm
**/
void on_if_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming colon token @p tk,
* overall parser state in @p p_psm
**/
void on_colon_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming singleassign token @p tk,
* overall parser state in @p p_psm
**/
void on_singleassign_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming string token @p tk,
* overall parser state in @p p_psm
**/
void on_string_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming f64 token @p tk,
* overall parser state in @p p_psm
**/
void on_f64_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming i64 token @p tk,
* overall parser state in @p p_psm
**/
void on_i64_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming bool token @p tk,
* overall parser state in @p p_psm
**/
void on_bool_token(const Token & tk,
ParserStateMachine * p_psm);
/** update state for this syntax on incoming semicolon token @p tk,
* overall parser state in @p p_psm
**/
void on_semicolon_token(const Token & tk,
ParserStateMachine * p_psm);
///@}
/** @defgroup scm-expectsymbol-printable-facet printable facet methods **/
///@{

1
include/xo/reader2/DSyntaxStateMachine.hpp
View file

@ -6,6 +6,7 @@
#pragma once
#include "SyntaxStateMachine.hpp"
#include "ParserStateMachine.hpp"
#include <xo/object2/DArray.hpp>
namespace xo {