| Server IP : 85.214.239.14 / Your IP : 13.59.58.68 Web Server : Apache/2.4.62 (Debian) System : Linux h2886529.stratoserver.net 4.9.0 #1 SMP Tue Jan 9 19:45:01 MSK 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.18 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : OFF | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : OFF Directory : /proc/3/cwd/proc/3/root/usr/share/doc/re2c/examples/go/reuse/ |
Upload File : |
//go:generate re2go $INPUT -o $OUTPUT
package main
// This example shows how to combine reusable re2c blocks: two blocks
// ('colors' and 'fish') are merged into one. The 'salmon' rule occurs
// in both blocks; the 'fish' block takes priority because it is used
// earlier. Default rule * occurs in all three blocks; the local (not
// inherited) definition takes priority.
const (
Color = iota
Fish
Dunno
)
/*!rules:re2c:colors
* { panic("eh!") }
"red" | "salmon" | "magenta" { return Color }
*/
/*!rules:re2c:fish
* { panic("oh!") }
"haddock" | "salmon" | "eel" { return Fish }
*/
func lex(str string) int {
var cur, mar int
/*!re2c
re2c:yyfill:enable = 0;
re2c:define:YYCTYPE = byte;
re2c:define:YYPEEK = "str[cur]";
re2c:define:YYSKIP = "cur += 1";
re2c:define:YYBACKUP = "mar = cur";
re2c:define:YYRESTORE = "cur = mar";
!use:fish;
!use:colors;
* { return Dunno } // overrides inherited '*' rules
*/
}
func main() {
assert_eq := func(x, y int) { if x != y { panic("error") } }
assert_eq(lex("salmon"), Fish);
assert_eq(lex("what?"), Dunno);
}