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xo-reader2 xo-expression2: define example working and printing

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def foo : f64 = 3.141593;
This commit is contained in:
Roland Conybeare 2026-01-22 18:40:42 -05:00
commit f6224eefea
2 changed files with 32 additions and 3 deletions
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31
src/reader2/DProgressSsm.cpp
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@ -5,7 +5,10 @@
#include "DProgressSsm.hpp"
#include "ssm/ISyntaxStateMachine_DProgressSsm.hpp"
#include <xo/printable2/Printable.hpp>
#include <xo/facet/FacetRegistry.hpp>
#include <xo/reflectutil/typeseq.hpp>
#include <xo/indentlog/print/cond.hpp>
#ifdef NOT_YET
#include "apply_xs.hpp"
@ -25,6 +28,8 @@ namespace xo {
using xo::scm::Variable;
using xo::scm::Apply;
#endif
using xo::print::APrintable;
using xo::facet::FacetRegistry;
using xo::facet::with_facet;
using xo::reflect::typeseq;
@ -211,12 +216,23 @@ namespace xo {
DProgressSsm::on_semicolon_token(const Token & tk,
ParserStateMachine * p_psm)
{
constexpr bool c_debug_flag = true;
scope log(XO_DEBUG(c_debug_flag));
/* note: implementation should parallel .on_rightparen_token() */
(void)tk;
obj<AExpression> expr = this->assemble_expr(p_psm);
{
obj<APrintable> expr_pr = FacetRegistry::instance().variant<APrintable,AExpression>(expr);
assert(expr_pr);
log && log(xtag("expr", expr_pr));
}
p_psm->pop_ssm();
p_psm->on_parsed_expression_with_semicolon(expr);
@ -951,12 +967,23 @@ namespace xo {
bool
DProgressSsm::pretty(const xo::print::ppindentinfo & ppii) const
{
scope log(XO_DEBUG(true));
log && log(xtag("lhs_.tseq", lhs_._typeseq()));
log && log(xtag("rhs_.tseq", rhs_._typeseq()));
obj<APrintable> lhs
= FacetRegistry::instance().variant<APrintable,AExpression>(lhs_);
obj<APrintable> rhs;
if (rhs_)
rhs = FacetRegistry::instance().variant<APrintable,AExpression>(rhs_);
return ppii.pps()->pretty_struct
(ppii,
"DProgressSsm",
refrtag("lhs", lhs_),
refrtag("lhs", lhs),
refrtag("op", op_type_),
refrtag("rhs", rhs_));
cond(rhs, refrtag("rhs", rhs), "nullptr"));
#ifdef NOPE
if (ppii.upto()) {