func ExampleMany() {
var r interface{}
var ok bool
prt := func() {
if ok {
fmt.Printf("Result: %c\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
}
letter := kern.Regexp(`\pL`)
p := kern.Many(letter)
t := utf88.Text("abc78d")
u := utf88.Text("789def")
r, ok = kern.ParseText(p, t)
prt()
r, ok = kern.ParseText(p, u)
prt()
// Output:
// Result: [[a] [b] [c]]
// Result: []
}
func ExampleParseText() {
var r interface{}
var ok bool
prt := func() {
if ok {
fmt.Printf("Result: %c\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
}
p := kern.Symbol(utf88.Codepoint('a'))
t := utf88.Text("abc")
r, ok = kern.ParseText(p, t)
prt()
u := utf88.Text("defg")
r, ok = kern.ParseText(p, u)
prt()
// Output:
// Result: a
// Error: Unexpected d input.
}
func ExampleOption() {
var r interface{}
var ok bool
prt := func() {
if ok {
fmt.Printf("Result: %s\n", utf88.Surr(r.(utf88.Text)))
} else {
fmt.Printf("Error: %v\n", r)
}
}
letter := kern.Regexp(`\pL`)
p := kern.Option(utf88.Text("None."), letter)
t := utf88.Text("abc")
u := utf88.Text("789")
r, ok = kern.ParseText(p, t)
prt()
r, ok = kern.ParseText(p, u)
prt()
// Output:
// Result: a
// Result: None.
}
func ExampleSepBy() {
var r interface{}
var ok bool
prt := func() {
if ok {
fmt.Printf("Result: %c\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
}
letter := kern.Regexp(`\pL`)
punc := kern.Regexp(`\pP`)
p := kern.SepBy(punc, letter)
t := utf88.Text("a;b:c789")
u := utf88.Text(";789")
r, ok = kern.ParseText(p, t)
prt()
r, ok = kern.ParseText(p, u)
prt()
// Output:
// Result: [[a] [b] [c]]
// Result: []
}
func ExampleAlt() {
var r interface{}
var ok bool
prt := func() {
if ok {
fmt.Printf("Result: %s\n", utf88.Surr(r.(utf88.Text)))
} else {
fmt.Printf("Error: %v\n", r)
}
}
lower := kern.Regexp(`\p{Ll}`)
upper := kern.Regexp(`\p{Lu}`)
digit := kern.Regexp(`\p{Nd}`)
p := kern.Alt(lower, digit)
q := kern.Alt(lower, digit, upper)
t := utf88.Text("7ef")
u := utf88.Text(";ef")
r, ok = kern.ParseText(p, t)
prt()
r, ok = kern.ParseText(p, u)
prt()
r, ok = kern.ParseText(q, t)
prt()
// Output:
// Result: 7
// Error: No alternatives selected.
// Result: 7
}
func ExampleNoneOf() {
p := kern.NoneOf(utf88.Text("xyz\n\t"))
t := utf88.Text("abcde")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %s\n", utf88.Sur(r.(utf88.Codepoint)))
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: a
}
func ExampleToken() {
p := kern.Token(utf88.Text("ab"))
t := utf88.Text("abc")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %s\n", utf88.Surr(r.(utf88.Text)))
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: ab
}
func ExampleFail() {
p := kern.Fail(utf88.Text("Some Failure"))
t := utf88.Text("anything")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %v\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Error: Some Failure
}
func ExampleTry() {
p := kern.Flatten(kern.Regexp(`\pL`), kern.Regexp(`\pL`))
q := kern.Flatten(kern.Regexp(`\pL`), kern.Regexp(`\pN`))
t := utf88.Text("a7bcde")
var r interface{}
var ok bool
prt := func() {
if ok {
fmt.Printf("Result: %s\n", utf88.Surr(r.(utf88.Text)))
} else {
fmt.Printf("Error: %v\n", r)
}
}
r, ok = kern.ParseText(kern.Alt(p, q), t)
prt()
r, ok = kern.ParseText(kern.Alt(kern.Try(p), q), t)
prt()
// Output:
// Error: Unexpected 7 input.
// Result: a7
}
func ExampleBind() {
var r interface{}
var ok bool
prt := func() {
if ok {
fmt.Printf("Result: %s\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
}
lower := kern.Regexp(`\p{Ll}`)
intNum := kern.Regexp(`\p{Nd}*`)
p := kern.Bind(lower, func(c interface{}) kern.Parser {
return kern.Bind(intNum, func(d interface{}) kern.Parser {
return kern.Bind(lower, func(e interface{}) kern.Parser {
return kern.Return(utf88.Surr(c.(utf88.Text)) + "," +
utf88.Surr(d.(utf88.Text)) + "," +
utf88.Surr(e.(utf88.Text)))
})
})
})
t := utf88.Text("e789fg")
r, ok = kern.ParseText(p, t)
prt()
// Output:
// Result: e,789,f
}
func ExampleAsk() {
letter := kern.Regexp(`\pL`)
digit := kern.Regexp(`\p{Nd}`)
p := kern.Ask(kern.Collect(digit, letter), utf88.Text("digit,letter"))
t := utf88.Text(";efg")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %s\n", utf88.Sur(r.(utf88.Codepoint)))
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Error: Unexpected ; input. Expecting digit,letter
}
func ExamplePrint() {
p := Alt(digit,
Alt(punct,
Print(u8.Text("Just before the letter:"), letter)))
parseStr(p, "defg")
// Output:
// Just before the letter: "defg"/0, ok, empty
}
func ExamplePrintState() {
p := Alt(digit,
Alt(punct,
Bind(PrintState(u8.Text("Just before the letter:")),
func(x interface{}) (p Parser) { return letter })))
parseStr(p, "defg")
// Output:
// Just before the letter: "defg"/0, ok, empty
}
//================================================================================
func TestInputAndPosition(t *testing.T) {
ts.LogAsserts("InputAndPosition", t, func(tt *ts.T) {
letter := Regexp(`\pL`)
p1 := Flatten(letter, letter, letter)
tt.AssertEqual(parseStr(SeqRight(SetInput(u8.Desur("Hi!")), GetInput), "abcdefg"),
PState{input: "Hi!", pos: 0, value: u8.Desur("Hi!"), empty: true, ok: true})
tt.AssertEqual(parseStr(SeqRight(letter, GetInput), "abcdefg"),
PState{input: "bcdefg", pos: 1, value: u8.Desur("bcdefg"), ok: true})
tt.AssertEqual(parseStr(SeqRight(SetPosition(100), GetPosition), "abcdefg"),
PState{input: "abcdefg", pos: 100, value: uint64(100), empty: true, ok: true})
tt.AssertEqual(parseStr(SeqRight(SetInputAndPosition(InputAndPosition{u8.Desur("Hi there!"), 5}), GetInputAndPosition), "abcdefg"),
PState{input: "Hi there!", pos: 5, value: InputAndPosition{u8.Desur("Hi there!"), 5}, empty: true, ok: true})
tt.AssertEqual(parseStr(Collect(p1, SeqRight(SetInput(u8.Desur("XYZ")), p1)), "ABCDEFG"),
PState{input: "", pos: 6, value: arrText("ABC", "XYZ"), ok: true}) //TODO: what should pos be?
tt.AssertEqual(parseStr(Collect(p1, SeqRight(SetInput(u8.Desur("XYZ")), p1)), "ABC"),
PState{input: "", pos: 6, value: arrText("ABC", "XYZ"), ok: true}) //TODO: ditto
tt.AssertEqual(parseStr(Collect(p1), "ABC"),
PState{input: "", pos: 3, value: arrText("ABC"), ok: true})
p2 := SeqRight(Skip(SetInput(u8.Text("XY0")), SetPosition(0)), p1)
tt.AssertEqual(parseStr(Collect(p1, p2), "ABC"),
PState{input: "0", pos: 2, value: nil, error: makeUnexpInp("0")})
p3 := SeqRight(Skip(SetInput(u8.Text("WXYZ")), SetPosition(0)), GetPosition)
tt.AssertEqual(parseStr(SeqRight(p1, p3), "ABC"),
PState{input: "WXYZ", pos: 0, value: uint64(0), ok: true})
p4 := SeqRight(SetInput(u8.Text("XYZ")), GetInput)
tt.AssertEqual(parseStr(SeqRight(p1, p4), "ABC"),
PState{input: "XYZ", pos: 3, value: u8.Text("XYZ"), ok: true})
tt.AssertEqual(parseStr(Collect(p1, SeqRight(SetInputAndPosition(InputAndPosition{u8.Desur("XYZ"), 2}), p1)), "ABCDEFG"), //posn changed from 3 to 2...
PState{input: "", pos: 5, value: arrText("ABC", "XYZ"), ok: true}) //...so posn is 5 instead of 6
})
}
func ExampleReturn() {
p := kern.Return(1234567890)
t := utf88.Text("anything")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %v\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: 1234567890
}
func ExampleSymbol() {
p := kern.Symbol(utf88.Codepoint('a'))
t := utf88.Text("abc")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %c\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: a
}
func ExampleRegexp() {
p := kern.Regexp(`z|a|b`)
t := utf88.Text("abc")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %s\n", utf88.Surr(r.(utf88.Text)))
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: a
}
func ExampleFwd() {
var expr func() kern.Parser
paren := func() kern.Parser {
return kern.SeqRight(kern.Token(utf88.Text(string('('))),
kern.SeqLeft(kern.Fwd(expr), // Fwd will evaluate passed expression lazily
kern.Token(utf88.Text(string(')')))))
}
expr = func() kern.Parser { // will parse string enclosed in parenthesis pairs to any depth
return kern.Alt(kern.Token(utf88.Text(string('a'))),
paren())
}
t := utf88.Text("(((a)))")
r, ok := kern.ParseText(expr(), t)
if ok {
fmt.Printf("Result: %s\n", utf88.Surr(r.(utf88.Text)))
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: a
}
func ExampleFwdWithParams() {
var expr func(...interface{}) kern.Parser
paren := func(as ...interface{}) kern.Parser {
return kern.SeqRight(kern.Token(utf88.Text(string('('))),
kern.SeqLeft(kern.FwdWithParams(expr, as...), // FwdWithParams will evaluate passed expression lazily
kern.Token(utf88.Text(string(')')))))
}
expr = func(as ...interface{}) kern.Parser { // will parse string enclosed in parenthesis pairs to any depth
return kern.Alt(kern.Token(utf88.Text(string('a'))),
paren(as...))
}
t := utf88.Text("(((a)))")
r, ok := kern.ParseText(expr(101, 102), t) // call expr with extra (unused in this e.g.) args
if ok {
fmt.Printf("Result: %s\n", utf88.Surr(r.(utf88.Text)))
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: a
}
func ExampleSatisfy() {
p := kern.Satisfy(func(c utf88.Codepoint) bool {
return c == 'a'
})
t := utf88.Text("abcde")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %c\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: a
}
func ExampleCollect() {
letter := kern.Regexp(`\pL`)
digit := kern.Regexp(`\p{Nd}`)
p := kern.Collect(letter, digit, letter)
t := utf88.Text("a5bc")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %c\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: [[a] [5] [b]]
}
func ExampleSeqRight() {
digit := kern.Regexp(`\p{Nd}`)
letter := kern.Regexp(`\pL`)
p := kern.SeqRight(digit, letter)
t := utf88.Text("7efg")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %s\n", utf88.Surr(r.(utf88.Text)))
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: e
}
// AlterTopStateStack assumes the user state in the parser state record
// is a slice, and alters the final value.
func AlterTopStateStack(k interface{}) Parser {
return Bind(GetState, func(s interface{}) Parser {
var vec []interface{}
tx := u8.Text("AlterTopStateStack doesn't handle zero-sized stacks.")
if s == nil {
vec = []interface{}{}
return Fail(tx)
} else if len(s.([]interface{})) == 0 {
return Fail(tx)
} else {
vec = make([]interface{}, 0)
for _, n := range s.([]interface{})[:len(s.([]interface{}))-1] {
vec = append(vec, n)
}
vec = append(vec, k)
}
return SeqRight(PutState(vec), Return(nil))
})
}
func ExampleApply() {
letter := kern.Regexp(`\pL`)
p := kern.Apply(func(c interface{}) interface{} {
cs := utf88.Surr(c.(utf88.Text))
return cs + cs + cs
}, letter)
t := utf88.Text("abc")
r, ok := kern.ParseText(p, t)
if ok {
fmt.Printf("Result: %s\n", r)
} else {
fmt.Printf("Error: %v\n", r)
}
// Output:
// Result: aaa
}
//================================================================================
func TestAsciiLexer(t *testing.T) {
ts.LogAsserts("AsciiLexer", t, func(tt *ts.T) {
a := NewAsciiLexer(false)
at := NewAsciiLexer(true)
tt.AssertEqual(parseStr(a.Letter(), "defg"),
PState{input: "efg", pos: 1, value: u8.Text("d"), ok: true})
tt.AssertEqual(parseStr(a.Letter(), ";efg"),
PState{input: ";efg", empty: true, error: makeUnexpInp(";")})
tt.AssertEqual(parseStr(a.Lower(), "defg"),
PState{input: "efg", pos: 1, value: u8.Text("d"), ok: true})
tt.AssertEqual(parseStr(a.Lower(), "Defg"),
PState{input: "Defg", empty: true, error: makeUnexpInp("D")})
tt.AssertEqual(parseStr(a.Lower(), ";efg"),
PState{input: ";efg", empty: true, error: makeUnexpInp(";")})
tt.AssertEqual(parseStr(a.Upper(), "Defg"),
PState{input: "efg", pos: 1, value: u8.Text("D"), ok: true})
tt.AssertEqual(parseStr(a.Upper(), "defg"),
PState{input: "defg", empty: true, error: makeUnexpInp("d")})
tt.AssertEqual(parseStr(a.Upper(), ";efg"),
PState{input: ";efg", empty: true, error: makeUnexpInp(";")})
tt.AssertEqual(parseStr(a.Digit(), "6efg"),
PState{input: "efg", pos: 1, value: u8.Text("6"), ok: true})
tt.AssertEqual(parseStr(a.Digit(), "defg"),
PState{input: "defg", empty: true, error: makeUnexpInp("d")})
tt.AssertEqual(parseStr(a.Space(), " efg"),
PState{input: "efg", pos: 1, value: u8.Text(" "), ok: true})
tt.AssertEqual(parseStr(a.Space(), "defg"),
PState{input: "defg", empty: true, error: makeUnexpInp("d")})
tt.AssertEqual(parseStr(a.Tab(), "\tefg"),
PState{input: "efg", pos: 1, value: u8.Text("\t"), ok: true})
tt.AssertEqual(parseStr(a.Tab(), "defg"),
PState{input: "defg", empty: true, error: makeUnexpInp("d")})
tt.AssertEqual(parseStr(a.Newline(),
"\nefg"), PState{input: "efg", pos: 1, value: u8.Text("\n"), ok: true})
tt.AssertEqual(parseStr(a.Newline(),
"\r\nefg"), PState{input: "\r\nefg", empty: true, error: makeUnexpInp("\r")})
tt.AssertEqual(parseStr(at.Newline(),
"\nefg"), PState{input: "efg", pos: 1, value: u8.Text("\n"), ok: true})
tt.AssertEqual(parseStr(at.Newline(),
"\r\nefg"), PState{input: "efg", pos: 2, value: u8.Text("\r\n"), ok: true})
tt.AssertEqual(parseStr(a.Whitespace(), " efg"),
PState{input: "efg", pos: 1, value: u8.Text(" "), ok: true})
tt.AssertEqual(parseStr(a.Whitespace(), "\tefg"),
PState{input: "efg", pos: 1, value: u8.Text("\t"), ok: true})
tt.AssertEqual(parseStr(a.Whitespace(), "\refg"),
PState{input: "efg", pos: 1, value: u8.Text("\r"), ok: true})
tt.AssertEqual(parseStr(a.Whitespace(), "\nefg"),
PState{input: "efg", pos: 1, value: u8.Text("\n"), ok: true})
tt.AssertEqual(parseStr(a.Whitespace(), "\fefg"),
PState{input: "efg", pos: 1, value: u8.Text("\f"), ok: true})
tt.AssertEqual(parseStr(a.Whitespace(), "\vefg"),
PState{input: "efg", pos: 1, value: u8.Text("\v"), ok: true})
tt.AssertEqual(parseStr(a.Whitespace(), "defg"),
PState{input: "defg", empty: true, error: makeUnexpInp("d")})
// Punct() Parser{ return Regexp(`[!"#%&'()*,\-./:;?@[\\\]_{}]`)
// StartPunct() Parser{ return Regexp(`[([{]`)
// EndPunct() Parser{ return Regexp(`[)\]}]`)
// ConnectorPunct() Parser{ return Regexp(`_`)
// DashPunct() Parser{ return Regexp(`-`)
// OtherPunct() Parser{ return Regexp(`[!"#%&'*,./:;?@\\]`)
// Symbol() Parser{ return Regexp(`[$+<=>^`+"`"+`|~]`)
// CurrencySymbol() Parser{ return Regexp(`$`)
// MathSymbol() Parser{ return Regexp(`[+<=>|~]`)
// ModifierSymbol() Parser{ return Regexp(`[^`+"`"+`]`)
// Control() Parser{ return Regexp(`[\x00-\x1F\x7F]`) //[:cntrl:]
// Graphical() Parser{ return Regexp(`[\x21-\x7E]`) //[:graph:]
// Printable() Parser{ return Regexp(`[\x20-\x7E]`) //[:print:]
})
}
//================================================================================
func TestLexer(t *testing.T) {
ts.LogAsserts("Lexer", t, func(tt *ts.T) {
u := NewUnicodeLexer()
tt.AssertEqual(parseStr(u.Letter(), "defg"),
PState{input: "efg", pos: 1, value: u8.Text("d"), ok: true})
tt.AssertEqual(parseStr(u.Letter(), ";efg"),
PState{input: ";efg", empty: true, error: makeUnexpInp(";")})
tt.AssertEqual(parseStr(u.Lower(), "defg"),
PState{input: "efg", pos: 1, value: u8.Text("d"), ok: true})
tt.AssertEqual(parseStr(u.Lower(), "Defg"),
PState{input: "Defg", empty: true, error: makeUnexpInp("D")})
tt.AssertEqual(parseStr(u.Lower(), ";efg"),
PState{input: ";efg", empty: true, error: makeUnexpInp(";")})
tt.AssertEqual(parseStr(u.Upper(), "Defg"),
PState{input: "efg", pos: 1, value: u8.Text("D"), ok: true})
tt.AssertEqual(parseStr(u.Upper(), "defg"),
PState{input: "defg", empty: true, error: makeUnexpInp("d")})
tt.AssertEqual(parseStr(u.Upper(), ";efg"),
PState{input: ";efg", empty: true, error: makeUnexpInp(";")})
tt.AssertEqual(parseStr(u.Digit(), "6efg"),
PState{input: "efg", pos: 1, value: u8.Text("6"), ok: true})
tt.AssertEqual(parseStr(u.Digit(), "defg"),
PState{input: "defg", empty: true, error: makeUnexpInp("d")})
tt.AssertEqual(parseStr(u.Whitespace(), " efg"),
PState{input: "efg", pos: 1, value: u8.Codepoint(' '), ok: true})
tt.AssertEqual(parseStr(u.Whitespace(), "\tefg"),
PState{input: "efg", pos: 1, value: u8.Codepoint('\t'), ok: true})
tt.AssertEqual(parseStr(u.Whitespace(), "\refg"),
PState{input: "efg", pos: 1, value: u8.Codepoint('\r'), ok: true})
tt.AssertEqual(parseStr(u.Whitespace(), "\nefg"),
PState{input: "efg", pos: 1, value: u8.Codepoint('\n'), ok: true})
tt.AssertEqual(parseStr(u.Whitespace(), "\fefg"),
PState{input: "efg", pos: 1, value: u8.Codepoint('\f'), ok: true})
tt.AssertEqual(parseStr(u.Whitespace(), "\vefg"),
PState{input: "efg", pos: 1, value: u8.Codepoint('\v'), ok: true})
tt.AssertEqual(parseStr(u.Whitespace(), "defg"),
PState{input: "defg", empty: true, error: makeUnexpInp("d")})
tt.AssertEqual(parseStr(u.Space(), " efg"),
PState{input: "efg", pos: 1, value: u8.Text(" "), ok: true})
tt.AssertEqual(parseStr(u.Space(), "defg"),
PState{input: "defg", empty: true, error: makeUnexpInp("d")})
// TitlecaseLetter() Parser{ return Regexp(`\p{Lt}`)
// ModifyingLetter() Parser{ return Regexp(`\p{Lm}`)
// OtherLetter() Parser{ return Regexp(`\p{Lo}`)
// Number() Parser{ return Regexp(`\pN`)
// LetterNumber() Parser{ return Regexp(`\p{Nl}`)
// OtherNumber() Parser{ return Regexp(`\p{No}`)
// Mark() Parser{ return Regexp(`\pM`)
// SpacingMark() Parser{ return Regexp(`\p{Mc}`)
// EnclosingMark() Parser{ return Regexp(`\p{Me}`)
// NonspacingMark() Parser{ return Regexp(`\p{Mn}`)
// Punct() Parser{ return Regexp(`\pP`)
// StartPunct() Parser{ return Regexp(`\p{Ps}`)
// EndPunct() Parser{ return Regexp(`\p{Pe}`)
// InitialPunct() Parser{ return Regexp(`\p{Pi}`)
// FinalPunct() Parser{ return Regexp(`\p{Pf}`)
// ConnectorPunct() Parser{ return Regexp(`\p{Pc}`)
// DashPunct() Parser{ return Regexp(`\p{Pd}`)
// OtherPunct() Parser{ return Regexp(`\p{Po}`)
// Symbol() Parser{ return Regexp(`\pS`)
// CurrencySymbol() Parser{ return Regexp(`\p{Sc}`)
// MathSymbol() Parser{ return Regexp(`\p{Sm}`)
// ModifierSymbol() Parser{ return Regexp(`\p{Sk}`)
// OtherSymbol() Parser{ return Regexp(`\p{So}`)
// Spacing() Parser{ return Regexp(`\pZ`)
// LineSeparator() Parser{ return Regexp(`\p{Zl}`)
// ParagraphSeparator() Parser{ return Regexp(`\p{Zp}`)
// OtherCategory() Parser{ return Regexp(`\pC`)
// Control() Parser{ return Regexp(`\p{Cc}`)
// Format() Parser{ return Regexp(`\p{Cf}`)
// PrivateUse() Parser{ return Regexp(`\p{Co}`)
// Nonchar() Parser{ return Regexp(`\p{Cn}`)
// Surrogate() Parser{ return Regexp(`\p{Cs}`)
// Graphical() Parser{ return len(cc) == 1 && unicode.IsGraphic(cc[0])
// Printable() Parser{ return len(cc) == 1 && unicode.IsPrint(cc[0])
// SpecialControl() Parser{ return len(cc) == 1 && unicode.IsControl(cc[0])
// CommonScript() Parser{ return len(cc) == 1 && unicode.In(cc[0], unicode.Common)
// InheritedScript() Parser{ return len(cc) == 1 && unicode.In(cc[0], unicode.Inherited)
// UnicodeIn(ranges ...*unicode.RangeTable) Parser { return len(cc) == 1 && unicode.In(cc[0], ranges...)
})
}