47 lines
833 B
C++
47 lines
833 B
C++
#ifndef EXPR_HH
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#define EXPR_HH
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#include "../tokenizer.hh"
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#include <string>
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#include <variant>
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struct Expr {};
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struct Binary : public Expr {
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Binary(Expr left, Token op, Expr right) : left{left}, op{op}, right{right} {};
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Expr left;
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Token op;
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Expr right;
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};
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struct Grouping : public Expr {
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Grouping(Expr expr) : expression{expr} {};
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Expr expression;
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};
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struct Literal : public Expr {
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Literal(Object value) : value{value} {};
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Object value;
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};
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struct Unary : public Expr {
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Unary(Token op, Expr right) : op{op}, right{right} {};
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Token op;
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Expr right;
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};
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using Expression = std::variant<Expr, Binary, Grouping, Literal, Unary>;
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class AstPrinter {
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public:
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std::string print(const Expression &expr);
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private:
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std::string parenthesize(const std::string &name, std::vector<Expression> exprs);
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};
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#endif
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