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xo-reader xo-expression: nested lambdas working properly + docs

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This commit is contained in:
Roland Conybeare 2025-07-06 14:13:44 -05:00
commit 699ee5d38e
41 changed files with 736 additions and 137 deletions
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31
xo-reader/src/reader/progress_xs.cpp
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@ -187,6 +187,35 @@ namespace xo {
this->rhs_ = expr.promote();
}
void
progress_xs::on_expr_with_semicolon(bp<Expression> expr,
parserstatemachine * p_psm)
{
constexpr bool c_debug_flag = true;
scope log(XO_DEBUG(c_debug_flag));
log && log(xtag("lhs", lhs_), xtag("op", op_type_), xtag("expr", expr));
constexpr const char * c_self_name = "progress_xs::on_expr_with_semicolon";
if (op_type_ == optype::invalid) {
throw std::runtime_error(tostr(c_self_name,
": consecutive unseparated exprs not legal"));
}
this->rhs_ = expr.promote();
// FORBIDDEN, because .on_semicolon_token() destroys *this before returning
// this->on_semicolon_token(token_type::semicolon(), p_psm);
// INSTEAD, spell out the body
rp<Expression> expr2 = this->assemble_expr();
std::unique_ptr<exprstate> self = p_psm->pop_exprstate();
p_psm->on_expr_with_semicolon(expr2);
}
void
progress_xs::on_symbol_token(const token_type & /*tk*/,
parserstatemachine * /*p_psm*/)
@ -225,6 +254,8 @@ namespace xo {
rp<Expression> expr = this->assemble_expr();
log && log(xtag("assembled-expr", expr));
std::unique_ptr<exprstate> self = p_psm->pop_exprstate();
p_psm->on_expr_with_semicolon(expr);