#ifndef INTERPRETER_AST_H
#define INTERPRETER_AST_H

typedef struct {
    void* elements;
    unsigned length;
} Array;

typedef struct {
    enum {
        LITERAL,
        VARIABLE,
        FUNCTION,
    } tag;
    union {
        int integer;
        char* variable;
        struct { char* name; Array args; } function;
    } data;
} Expr;

typedef struct {
    enum {
        SET,
        WHILE,
        EXPR,
    } tag;
    union {
        struct { char* name; Expr expr; } Set;
        struct { Expr condition; Array block; } While;
        struct { Expr expr; } Expr;
    } data;
} Stmt;

typedef struct {
    Stmt* stmts;
    unsigned length;
} StmtArray;

void print_expr(Expr);
void print_ast(StmtArray);

#endif