func testParse(src string, r Rule) (n int, tok token.Token) {
eat := 0
ok := false
parser.Fast(
[]byte(src),
func(_ scanner.Pos, t token.Token, _ string) error {
if t == token.EOF {
if !ok {
// 让 More 结束
_, ok = r.Eat(t)
}
if ok {
tok = token.EOF
}
return nil
}
// 去占位,
if t > token.IDENT {
return nil
}
if t == token.NL {
// 合并连续的换行, 清理排版换行
switch tok {
case token.NL, token.EOF, token.COMMA, token.SEMICOLON,
token.LEFT, token.RIGHT:
return nil
}
// 推延换行
tok = token.NL
return nil
}
if tok == token.NL {
switch t {
case token.COMMA, token.SEMICOLON, token.RIGHT:
default:
// 换行改 ";"
eat, ok = r.Eat(token.SEMICOLON)
if eat == 0 {
return io.ErrNoProgress
}
n++
}
}
tok = t
eat, ok = r.Eat(t)
if eat == 0 {
return io.ErrNoProgress
}
n++
return nil
})
return
}
func Test_eq(t *testing.T) {
for _, ss := range good {
nodes, err := parser.Fast([]byte(ss[0]), nil)
if err != nil {
t.Fatal(err)
}
if len(nodes) != len(ss)-1 {
t.Fatal(nodes)
}
ss = ss[1:]
for i, n := range nodes {
if ss[i] != n.Source {
t.Fatal(n)
}
}
}
}