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#ifndef AST_H
#define AST_H
struct stmt_node;
struct expr_node;
struct type_node {
bool _unsigned;
bool _short;
bool _long;
unsigned char ptr_level;
char* name;
};
struct int_lit_node {
long long val;
};
struct var_ref_node {
char* ident;
};
struct var_decl_node {
struct type_node type;
char* ident;
struct var_decl_node* next;
};
struct lval_node {
enum {
LVAL_VAR_DECL,
LVAL_VAR_REF,
} type;
union {
struct var_ref_node _var_ref;
struct var_decl_node _var_decl;
} as;
};
/* TODO: add to expression, parse */
struct assign_node {
struct lval_node lval;
struct expr_node* rval;
};
struct expr_node {
enum {
EXPR_INT_LIT,
EXPR_VAR_REF,
EXPR_ASSIGN,
} type;
union {
struct int_lit_node _int_lit;
struct var_ref_node _var_ref;
struct assign_node _assign;
} as;
};
struct group_node {
struct stmt_node* body_head;
};
struct fn_decl_node {
struct type_node return_type;
char* name;
struct var_decl_node* args_head;
struct group_node body;
};
struct return_node {
struct expr_node* ret_val; /* null to return void */
};
struct stmt_node {
enum {
STMT_EMPTY,
STMT_EXPR,
STMT_VAR_DECL,
STMT_RETURN,
STMT_GROUP,
} type;
union {
struct expr_node _expr;
struct var_decl_node _var_decl;
struct return_node _return;
struct group_node _group;
} as;
struct stmt_node* next;
};
struct root_node {
enum {
ROOT_FN_DECL,
} type;
union {
struct fn_decl_node _fn_decl;
} as;
struct root_node* next;
};
void ast_destroy(struct root_node* head);
#endif
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