Last active
June 10, 2017 23:26
-
-
Save cstockton/895217919b8439de181bb180085cb6ea to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
/* | |
package unibox | |
import ( | |
"bytes" | |
"strings" | |
"unicode/utf8" | |
) | |
// p := `𝕒A𝕓B𝕔C` | |
// fmt.Println(`trace:`, p) | |
// for i := -3; i < len(p)+3; i++ { | |
// fmt.Println(` pat:`, p) | |
// fmt.Println(` pad:`, unibox.MarkEdge(p, i)) | |
// fmt.Println(` pad:`, unibox.MarkLine(p, i)) | |
// } | |
type Marker interface { | |
MarkUnderflow() rune | |
MarkLeft() rune | |
Mark() rune | |
Line() rune | |
MarkRight() rune | |
MarkOverflow() rune | |
} | |
type runeMarker struct { | |
mu, ml, m, l, mr, mo rune | |
} | |
func (r *runeMarker) MarkUnderflow() rune { return r.mu } | |
func (r *runeMarker) MarkLeft() rune { return r.ml } | |
func (r *runeMarker) Mark() rune { return r.m } | |
func (r *runeMarker) Line() rune { return r.l } | |
func (r *runeMarker) MarkRight() rune { return r.mr } | |
func (r *runeMarker) MarkOverflow() rune { return r.mo } | |
var ( | |
EdgeMarker = &runeMarker{'╙', '└', '┴', '─', '┘', '╜'} | |
LineMarker = &runeMarker{'┹', '┵', '┴', '─', '┶', '┺'} | |
) | |
func MarkEdge(pat string, off int) string { | |
return MarkWith(pat, off, EdgeMarker) | |
} | |
func MarkLine(pat string, off int) string { | |
return MarkWith(pat, off, LineMarker) | |
} | |
func MarkRunes(pat string, off int, mu, ml, m, l, mr, mo rune) string { | |
rm := runeMarker{mu, ml, m, l, mr, mo} | |
return MarkWith(pat, off, &rm) | |
} | |
func MarkWith(pat string, off int, m Marker) string { | |
l := m.Line() | |
if off < 0 { | |
return string(m.MarkUnderflow()) + | |
strings.Repeat(string(l), utf8.RuneCountInString(pat)-1) | |
} | |
if off >= len(pat) { | |
return strings.Repeat( | |
string(l), utf8.RuneCountInString(pat)-1) + string(m.MarkOverflow()) | |
} | |
var buf bytes.Buffer | |
for idx, r := range pat { | |
box := l | |
switch { | |
case idx == 0 && off < utf8.RuneLen(r): | |
box, off = m.MarkLeft(), len(pat)*2 | |
case utf8.RuneLen(r)+idx > off: | |
if off == len(pat) { | |
box, off = m.MarkRight(), len(pat)*2 | |
} else { | |
box, off = m.Mark(), len(pat)*2 | |
} | |
} | |
buf.WriteRune(box) | |
} | |
return buf.String() | |
} | |
*/ | |
import ( | |
"bytes" | |
"fmt" | |
"strings" | |
"unicode/utf8" | |
) | |
// // Trace is like Scan but will trace the scan to the given writer and return a | |
// // partial result on error. | |
// func Trace(w io.Writer, p string) (toks []token.Token, err error) { | |
// rl := utf8.RuneCountInString(p) | |
// l := utf8.RuneCountInString(p) | |
// if l < 12 { | |
// l = 12 | |
// } | |
// bar := strings.Repeat(`─`, l-rl) | |
// ls := strconv.Itoa(l) | |
// | |
// top := `╔═════╤═════╤═` + strings.Repeat(`═`, l) + | |
// `═╤════════════════════════════════╗` | |
// if _, err = fmt.Fprintf(w, "%v\n", top); err != nil { | |
// return nil, err | |
// } | |
// | |
// head := fmt.Sprintf("║ %v │ %v │ %-"+ls+"v │ %-30v ║", | |
// `Off`, `Pos`, `Pattern (`+ls+`)`, `Token`) | |
// if _, err = fmt.Fprintln(w, head); err != nil { | |
// return nil, err | |
// } | |
// | |
// col := `╠═════╪═════╪═` + strings.Repeat(`═`, l) + | |
// `═╪════════════════════════════════╣` | |
// if _, err = fmt.Fprintf(w, "%v\n", col); err != nil { | |
// return nil, err | |
// } | |
// | |
// var s Scanner | |
// if err = s.Reset(p); err != nil { | |
// return nil, err | |
// } | |
// for s.More() { | |
// tok := s.Scan() | |
// toks = append(toks, tok) | |
// tokPad := strings.Repeat(`─`, 8-len(tok.Lex.String())) | |
// tokCol := fmt.Sprintf("%v╼%s╾ %-16q", tokPad, tok.Lex, tok.Lit) | |
// pad := trace(p, s.off) | |
// fmt.Fprintf(w, "║ %3.1d │ %3.1d │ %-"+ls+"v ├%-31v ║\n", | |
// s.off, s.pos, p, tokCol) | |
// if s.More() { | |
// fmt.Fprintf(w, "║─────┼─────┼─%v%v─┼────────────────────────────────╢\n", pad, bar) | |
// } else { | |
// fmt.Fprintf(w, "╙─────┴─────┴─%v%v─┴────────────────────────────────╜\n", pad, bar) | |
// } | |
// } | |
// return toks, s.Err() | |
// } | |
func tracePad(pat string, off int) string { | |
return tracePadWith(pat, off, '╙', '└', '┴', '─', '┘', '╜') | |
} | |
func tracePadWith(pat string, off int, neg, ml, m, nf, mr, eof rune) string { | |
if off < 0 { | |
return string(neg) + strings.Repeat( | |
string(nf), utf8.RuneCountInString(pat)-1) | |
} | |
if off >= len(pat) { | |
return strings.Repeat( | |
string(nf), utf8.RuneCountInString(pat)-1) + string(eof) | |
} | |
var buf bytes.Buffer | |
for idx, r := range pat { | |
box := nf | |
switch { | |
case idx == 0 && off < utf8.RuneLen(r): | |
box, off = ml, len(pat)*2 | |
case utf8.RuneLen(r)+idx > off: | |
if off == len(pat) { | |
box, off = mr, len(pat)*2 | |
} else { | |
box, off = m, len(pat)*2 | |
} | |
} | |
buf.WriteRune(box) | |
} | |
return buf.String() | |
} | |
func main() { | |
p := `𝕒A𝕓B𝕔C𝕕` | |
fmt.Println(`trace:`, p) | |
for i := -1; i < len(p)+1; i++ { | |
fmt.Printf(" %2.1d %v\n", i, p) | |
fmt.Printf(" %v\n", tracePad(p, i)) | |
} | |
// ╔═════╤═════╤══════════════════════════════════════════════════╤════════════════════════════════╗ | |
// ║ Off │ Pos │ Pattern (48) │ Token ║ | |
// ╠═════╪═════╪══════════════════════════════════════════════════╪════════════════════════════════╣ | |
// ║ 0 │ 1 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├──╼FSLASH╾ "/" ║ | |
// ║─────┼─────┼─└────────────────────────────────────────────────┼────────────────────────────────╢ | |
// ║ 1 │ 2 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├──╼FSLASH╾ "/" ║ | |
// ║─────┼─────┼──┴───────────────────────────────────────────────┼────────────────────────────────╢ | |
// ║ 5 │ 6 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├─────╼LIT╾ "rgs" ║ | |
// ║─────┼─────┼──────┴───────────────────────────────────────────┼────────────────────────────────╢ | |
// ║ 6 │ 7 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├──╼FSLASH╾ "/" ║ | |
// ║─────┼─────┼───────┴──────────────────────────────────────────┼────────────────────────────────╢ | |
// ║ 11 │ 12 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├─────╼LIT╾ "orgs" ║ | |
// ║─────┼─────┼────────────┴─────────────────────────────────────┼────────────────────────────────╢ | |
// ║ 12 │ 13 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├──╼FSLASH╾ "/" ║ | |
// ║─────┼─────┼─────────────┴────────────────────────────────────┼────────────────────────────────╢ | |
// ║ 17 │ 18 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├─────╼LIT╾ "eams" ║ | |
// ║─────┼─────┼──────────────────┴───────────────────────────────┼────────────────────────────────╢ | |
// ║ 18 │ 19 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├──╼FSLASH╾ "/" ║ | |
// ║─────┼─────┼───────────────────┴──────────────────────────────┼────────────────────────────────╢ | |
// ║ 23 │ 24 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├─────╼LIT╾ "team" ║ | |
// ║─────┼─────┼────────────────────────┴─────────────────────────┼────────────────────────────────╢ | |
// ║ 41 │ 42 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├─────╼LIT╾ "[a-zA-Z0-9]{3-12}" ║ | |
// ║─────┼─────┼──────────────────────────────────────────┴───────┼────────────────────────────────╢ | |
// ║ 42 │ 43 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├──╼FSLASH╾ "/" ║ | |
// ║─────┼─────┼───────────────────────────────────────────┴──────┼────────────────────────────────╢ | |
// ║ 43 │ 44 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├──╼FSLASH╾ "/" ║ | |
// ║─────┼─────┼────────────────────────────────────────────┴─────┼────────────────────────────────╢ | |
// ║ 48 │ 48 │ /orgs/:orgs/teams/:team([a-zA-Z0-9]{3-12})/users ├─────╼LIT╾ "sers" ║ | |
// ╙─────┴─────┴────────────────────────────────────────────────╜─┴────────────────────────────────╜ | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment