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xo-reader: + expect_formal_xs [wip - not used]

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This commit is contained in:
Roland Conybeare 2024-08-16 21:55:23 -04:00
commit 6d5387eef7
8 changed files with 282 additions and 12 deletions
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50
src/reader/exprstate.cpp
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@ -1,6 +1,8 @@
/* @file exprstate.cpp */
#include "exprstate.hpp"
#include "formal_arg.hpp"
#include <stdexcept>
//#include "define_xs.hpp"
//#include "progress_xs.hpp"
//#include "paren_xs.hpp"
@ -63,15 +65,45 @@ namespace xo {
}
void
exprstate::on_typedescr(TypeDescr /*td*/,
exprstatestack * /*p_stack*/,
exprstate::on_typedescr(TypeDescr td,
exprstatestack * p_stack,
rp<Expression> * /*p_emit_expr*/)
{
/* returning type description to something that wants it */
/* unreachable - implement in derived class */
assert(false);
return;
constexpr bool c_debug_flag = true;
scope log(XO_DEBUG(c_debug_flag));
log && log(xtag("exstype",
p_stack->top_exprstate().exs_type()));
constexpr const char * c_self_name = "exprstate::on_typedescr";
throw std::runtime_error(tostr(c_self_name,
": unexpected typedescr for parsing state",
xtag("td", td),
xtag("state", *this)));
}
void
exprstate::on_formal(const formal_arg & formal,
exprstatestack * p_stack,
rp<Expression> * /*p_emit_expr*/)
{
/* returning type description to something that wants it */
constexpr bool c_debug_flag = true;
scope log(XO_DEBUG(c_debug_flag));
log && log(xtag("exstype",
p_stack->top_exprstate().exs_type()));
constexpr const char * c_self_name = "exprstate::on_formal";
throw std::runtime_error(tostr(c_self_name,
": unexpected formal-arg for parsing state",
xtag("formal", formal),
xtag("state", *this)));
}
void
@ -254,13 +286,19 @@ namespace xo {
} /*on_expr*/
void
exprstate::on_symbol(const std::string & /*symbol_name*/,
exprstate::on_symbol(const std::string & symbol_name,
exprstatestack * /*p_stack*/,
rp<Expression> * /*p_emit_expr*/)
{
/* unreachable - derived class that can receive
* will override this method
*/
constexpr bool c_debug_flag = true;
scope log(XO_DEBUG(c_debug_flag));
log && log(xtag("exstype", this->exs_type_),
xtag("symbol_name", symbol_name));
assert(false);
}