50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
/* file expect_expr_xs.hpp
|
|
*
|
|
* author: Roland Conybeare, Aug 2024
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "exprstate.hpp"
|
|
|
|
namespace xo {
|
|
namespace scm {
|
|
|
|
/** @class expect_expr_xs
|
|
* @brief state machine to expect + capture an expression
|
|
**/
|
|
class expect_expr_xs : public exprstate {
|
|
public:
|
|
expect_expr_xs();
|
|
|
|
static void start(exprstatestack * p_stack);
|
|
|
|
virtual void on_lambda_token(const token_type & tk,
|
|
exprstatestack * p_stack,
|
|
rp<Expression> * p_emit_expr) override;
|
|
virtual void on_leftparen_token(const token_type & tk,
|
|
exprstatestack * p_stack,
|
|
rp<Expression> * p_emit_expr) override;
|
|
|
|
virtual void on_symbol_token(const token_type & tk,
|
|
exprstatestack * p_stack,
|
|
rp<Expression> * p_emit_expr) override;
|
|
|
|
virtual void on_f64_token(const token_type & tk,
|
|
exprstatestack * p_stack,
|
|
rp<Expression> * p_emit_expr) override;
|
|
|
|
/** update exprstate in response to a successfully-parsed subexpression **/
|
|
virtual void on_expr(ref::brw<Expression> expr,
|
|
exprstatestack * p_stack,
|
|
rp<Expression> * p_emit_expr) override;
|
|
|
|
private:
|
|
static std::unique_ptr<expect_expr_xs> make();
|
|
};
|
|
|
|
} /*namespace scm*/
|
|
} /*namespace xo*/
|
|
|
|
|
|
/* end expect_expr_xs.hpp */
|