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 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 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 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 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 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
}
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 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 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
}