#ifndef CERC_PARSE_H
#define CERC_PARSE_H
#include "lex.h"
#include "type.h"

struct ast_externfunc {
	const char *name;
	struct type ret;
	struct type params[];
};

struct ast_param {
	const char *name;
	struct type type;
};

struct ast_cmd { /* TODO */ };

struct ast_block {
	struct ast_cmd *cmds;
};

struct ast_func {
	bool pub, exported;
	const char *name;
	struct ast_block block;
	struct type ret;
	struct ast_param params[];
};

enum const_global {
	CST_TYPE,
	CST_BOOL,
	CST_NUMBER,
	CST_STRING,
};

struct ast_const_global {
	bool pub;
	const char *name;
	enum const_global kind;
	union {
		struct type *type;
		bool b;
		struct number num;
		const char *str;
	} value;
};

struct ast_path {
	const char **segments;
};

struct ast_import {
	struct ast_path path;
	const char *name;
};

enum toplevel {
	TOP_EXTERNFUNC,
	TOP_FUNC,
	TOP_CONST,
};

struct ast_toplevel {
	enum toplevel kind;
	union {
		struct ast_externfunc *extfn;
		struct ast_func *function;
		struct ast_const_global *constant;
	} decl;
};

struct ast_subunit {
	struct ast_import *imports;
	struct ast_toplevel tops[];
};

struct ast_unit {
	struct ast_subunit *root;
	struct ast_subunit imports[];
};

void parse(struct lexer *lexer, struct ast_unit *ast);

#endif