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xo-expression xo-reader: parser improvements, prep type inf/unify

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This commit is contained in:
Roland Conybeare 2025-07-28 09:12:41 -04:00
commit f3fde735da
18 changed files with 274 additions and 45 deletions
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38
xo-reader/src/reader/if_else_xs.cpp
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@ -164,6 +164,30 @@ namespace xo {
this->illegal_input_on_token(c_self_name, tk, exp, p_psm);
}
void
if_else_xs::finish_and_continue(parserstatemachine * p_psm)
{
rp<IfExprAccess> if_expr = this->if_expr_;
std::unique_ptr<exprstate> self = p_psm->pop_exprstate();
if (this->ifxs_type_ == ifexprstatetype::if_4) {
/* if no else-branch, then if-expr can't have valuetype */
if_expr->assign_valuetype(nullptr);
}
p_psm->top_exprstate().on_expr(if_expr, p_psm);
}
void
if_else_xs::on_rightbrace_token(const token_type & tk,
parserstatemachine * p_psm)
{
scope log(XO_DEBUG(p_psm->debug_flag()));
this->finish_and_continue(p_psm);
p_psm->on_rightbrace_token(tk);
}
void
if_else_xs::on_semicolon_token(const token_type & tk,
parserstatemachine * p_psm)
@ -180,24 +204,18 @@ namespace xo {
case ifexprstatetype::n_ifexprstatetype:
// unreachable
assert(false);
return;
break;
case ifexprstatetype::if_1:
case ifexprstatetype::if_2:
case ifexprstatetype::if_3:
case ifexprstatetype::if_5:
this->illegal_input_on_token(c_self_name, tk, get_expect_str(), p_psm);
return;
break;
case ifexprstatetype::if_4:
case ifexprstatetype::if_6: {
rp<IfExprAccess> if_expr = this->if_expr_;
std::unique_ptr<exprstate> self = p_psm->pop_exprstate();
TypeDescr td = nullptr;
if_expr->assign_valuetype(td);
p_psm->top_exprstate().on_expr(if_expr, p_psm);
return;
this->finish_and_continue(p_psm);
break;
}
}
}