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#pragma once
#include <stdbool.h>
typedef enum ASTtype{
AST_LIST,
AST_WORD,
AST_NUMBER,
AST_STRING,
AST_SYMBOL,
} ASTtype;
typedef struct AST AST;
typedef struct ASTlist{
int len;
AST **nodes;
bool quoted;
} ASTlist;
typedef struct ASTword{
char *word;
} ASTword;
typedef struct ASTnumber{
double num;
} ASTnumber;
typedef struct ASTstring{
char *str;
int len;
} ASTstring;
typedef struct ASTsymbol{
char *name;
int symid;
//if you're not the interpreter:
// if you just allocated the ASTsymbol yourself, set symid to -1;
// else, leave symid alone.
//You should probably use ast_symbol(), in which case you don't have to do anything.
} ASTsymbol;
struct AST{
ASTtype type;
union {
ASTlist l;
ASTword w;
ASTnumber n;
ASTstring S;
ASTsymbol s;
};
};
void ast_free(AST *ast);
AST* ast_copy(const AST *ast);
char* ast_stringify(const AST *ast);
AST* ast_list(int len,AST **nodes); //these convenience functions DO NOT copy their arguments
AST* ast_word(char *word);
AST* ast_number(double num);
AST* ast_string(char *str,int len);
AST* ast_symbol(char *name);
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