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//go:generate re2go $INPUT -o $OUTPUT --input-encoding utf8
package main
// This example supports multiple input encodings: UTF-8 and UTF-32.
// Both lexers are generated from the same rules block, and the use
// blocks add only encoding-specific configurations.
/*!rules:re2c
re2c:yyfill:enable = 0;
re2c:define:YYPEEK = "str[cur]";
re2c:define:YYSKIP = "cur += 1";
re2c:define:YYBACKUP = "mar = cur";
re2c:define:YYRESTORE = "cur = mar";
"∀x ∃y" { return 0; }
* { return 1; }
*/
func lexUTF8(str []uint8) int {
var cur, mar int
/*!use:re2c
re2c:encoding:utf8 = 1;
re2c:define:YYCTYPE = uint8;
*/
}
func lexUTF32(str []uint32) int {
var cur, mar int
/*!use:re2c
re2c:encoding:utf32 = 1;
re2c:define:YYCTYPE = uint32;
*/
}
func main() {
assert_eq := func(x, y int) { if x != y { panic("error") } }
assert_eq(lexUTF8([]uint8{0xe2, 0x88, 0x80, 0x78, 0x20, 0xe2, 0x88, 0x83, 0x79}), 0)
assert_eq(lexUTF32([]uint32{0x2200, 0x78, 0x20, 0x2203, 0x79}), 0)
}