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package examples
import (
"io"
"fmt"
parser "github.com/leodido/ragel-machinery/parser"
)
%%{
machine newlines;
action line {
{
m.lines = append(m.lines, string(data[:p+1]))
}
}
main := ("example" . ' '? . digit+ @line) . 10;
}%%
%% write data nofinal;
type newlinesMachine struct{
// define here your support variables for ragel actions
lines []string
}
// Exec implements the parser.Parser interface.
func (m *newlinesMachine) Exec(s *parser.State) (int, int) {
// Tell it to parse from the start for each byte(10) delimited incoming chunk
cs := %%{ write start; }%%
// Retrieve previously stored parsing variables
_, p, pe, eof, data := s.Get()
// Inline FSM code here
%% write exec;
// Update parsing variables
s.Set(cs, p, pe, eof)
return p, pe
}
func (m *newlinesMachine) OnErr(c []byte) {
fmt.Println("OnErr")
if len(c) > 0 {
fmt.Println(string(c))
}
}
func (m *newlinesMachine) OnEOF(c []byte) {
fmt.Println("OnEOF")
if len(c) > 0 {
fmt.Println(string(c))
}
}
func (m *newlinesMachine) OnCompletion() {
fmt.Println("OnCompletion")
}
// Parse composes a new ragel parser for the incoming stream using the current FSM.
func (m *newlinesMachine) Parse(r io.Reader) []string {
m.lines = []string{}
p := parser.New(
parser.ArbitraryReader(r, '\n'), // How to read the stream
m, // How to parse it
parser.WithStart(%%{ write start; }%%), // Options
)
p.Parse()
return m.lines
}
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