63 lines
1.2 KiB
C++
63 lines
1.2 KiB
C++
#include <string>
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#include "token.hpp"
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#include "visitor.hpp"
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#include "num.hpp"
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namespace dsp {
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struct expr_t
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{
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virtual void accept(visitor_t<void> const * visitor) const = 0;
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virtual std::string accept(visitor_t<std::string> const * visitor) const = 0;
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};
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template <typename T>
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struct expr_accept_t : expr_t {
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virtual void accept(visitor_t<void> const * visitor) const {
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return visitor->visit(static_cast<const T*>(this));
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}
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virtual std::string accept(visitor_t<std::string> const * visitor) const
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{
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return visitor->visit(static_cast<const T*>(this));
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}
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};
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struct binary_t : expr_accept_t<binary_t>
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{
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binary_t(expr_t * left, token_t oper, expr_t * right)
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: left(left), oper(oper), right(right) {}
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const expr_t * left;
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const token_t oper;
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const expr_t * right;
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};
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struct grouping_t : expr_accept_t<grouping_t>
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{
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grouping_t(expr_t * expr)
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: expr(expr) {}
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const expr_t * expr;
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};
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struct literal_t : expr_accept_t<literal_t>
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{
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literal_t(num_t value)
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: value(value) {}
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const num_t value;
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};
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struct unary_t : expr_accept_t<unary_t>
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{
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unary_t(token_t oper, expr_t * right)
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: oper(oper), right(right) {}
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const token_t oper;
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const expr_t * right;
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};
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}
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