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xo-reader: wip: + paren_xs impl [not used]

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Roland Conybeare 2024-08-09 11:41:40 -04:00
commit ccfd0660d5
3 changed files with 312 additions and 1 deletions
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88
include/xo/reader/paren_xs.hpp Normal file
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/** @file paren_xs.hpp
*
* Author: Roland Conybeare
**/
#pragma once
#include "exprstate.hpp"
//#include <cstdint>
namespace xo {
namespace scm {
enum class parenexprstatetype {
invalid = -1,
lparen_0,
lparen_1,
n_parenexprstatetype,
};
/** @class paren_xs
* @brief state machine for handling parentheses in expressions
**/
class paren_xs : public exprstate {
public:
//paren_xs(rp<Expression> valex);
virtual ~paren_xs() = default;
static const paren_xs * from(const exprstate * x) { return dynamic_cast<const paren_xs *>(x); }
//static std::unique_ptr<paren_xs> make();
virtual bool admits_definition() const override;
virtual bool admits_symbol() const override;
virtual bool admits_colon() const override;
virtual bool admits_semicolon() const override;
virtual bool admits_singleassign() const override;
virtual bool admits_leftparen() const override;
virtual bool admits_rightparen() const override;
virtual bool admits_f64() const override;
// virtual void on_f64(..) override
virtual void on_def(exprstatestack * p_stack) override;
virtual void on_expr(ref::brw<Expression> expr,
exprstatestack * p_stack,
rp<Expression> * p_emit_expr) override;
virtual void on_symbol(const std::string & symbol,
exprstatestack * p_stack,
rp<Expression> * p_emit_expr) override;
virtual void on_typedescr(TypeDescr td,
exprstatestack * /*p_stack*/,
rp<Expression> * /*p_emit_expr*/) override;
virtual void on_symbol(const token_type & tk,
exprstatestack * p_stack,
rp<Expression> * p_emit_expr) override;
virtual void on_colon(exprstatestack * p_stack) override;
virtual void on_semicolon(exprstatestack * p_stack,
rp<Expression> * /*p_emit_expr*/) override;
virtual void on_singleassign(exprstatestack * p_stack) override;
virtual void on_leftparen(exprstatestack * p_stack,
rp<Expression> * /*p_emit_expr*/) override;
virtual void on_rightparen(exprstatestack * p_stack,
rp<Expression> * /*p_emit_expr*/) override;
virtual void on_f64(const token_type & tk,
exprstatestack * p_stack,
rp<Expression> * /*p_emit_expr*/) override;
virtual void print(std::ostream & os) const override;
private:
#ifdef NOT_YET
/**
* ( foo ... )
* ^
* |
* lparen_0
**/
parenexprstatetype parenxs_type_;
#endif
};
} /*namespace scm*/
} /*namespace xo*/
/** end paren_xs.hpp **/