40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
/* file parserstatemachine.hpp
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*
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* author: Roland Conybeare, Aug 2024
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*/
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#pragma once
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#include "exprstate.hpp"
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namespace xo {
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namespace scm {
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/** @class parserstatemachine
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* @brief public parser state.
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*
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* Schematica parser state; sent to subsidiary single-feature state machines.
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* For example entry points for the lambda feature (@ref lambda_xs)
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* will accept a non-const parserstatemachine pointer argument
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**/
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class parserstatemachine {
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public:
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using Expression = xo::ast::Expression;
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public:
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parserstatemachine(exprstatestack * p_stack,
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rp<Expression> * p_emit_expr)
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: p_stack_{p_stack}, p_emit_expr_{p_emit_expr} {}
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std::unique_ptr<exprstate> pop_exprstate();
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exprstate & top_exprstate();
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void push_exprstate(std::unique_ptr<exprstate> x);
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public:
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exprstatestack * p_stack_;
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rp<Expression> * p_emit_expr_;
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};
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} /*namespace scm*/
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} /*namespace xo*/
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/* end parserstatemachine.hpp */
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