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Color escaped characters inside strings #10

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Merged
merged 1 commit into from
Feb 14, 2015
Merged

Color escaped characters inside strings #10

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29 changes: 28 additions & 1 deletion printer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ import (
"fmt"
"reflect"
"regexp"
"strconv"
"strings"
"text/tabwriter"
)
Expand Down Expand Up @@ -104,8 +105,34 @@ func (p *printer) colorPrint(text, color string) {
}

func (p *printer) printString() {
quoted := strconv.Quote(p.value.String())
quoted = quoted[1 : len(quoted)-1]

p.colorPrint(`"`, "Red")
p.colorPrint(p.value.String(), "red")
for len(quoted) > 0 {
pos := strings.IndexByte(quoted, '\\')
if pos == -1 {
p.colorPrint(quoted, "red")
break
}
if pos != 0 {
p.colorPrint(quoted[0:pos], "red")
}

n := 1
switch quoted[pos+1] {
case 'x': // "\x00"
n = 3
case 'u': // "\u0000"
n = 5
case 'U': // "\U00000000"
n = 9
case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': // "\000"
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Owner

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By the way, go compiler's scanner does not accept this type of literal whose number starts with '8' or '9' ★. So you don't have to care about '8' and '9' .

And current strconv.Quote()'s implementation returns not \000 but \x00 for both "\000" and "\x00" ★. Maybe L130-L131 are not used.

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😳 You're right. Sorry!

n = 3
}
p.colorPrint(quoted[pos:pos+n+1], "Magenta")
quoted = quoted[pos+n+1:]
}
p.colorPrint(`"`, "Red")
}

Expand Down
2 changes: 2 additions & 0 deletions printer_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,7 @@ var (
}
`,
},
{"日本\t語\x00", `[red][bold]"[reset][red]日本[reset][magenta][bold]\t[reset][red]語[reset][magenta][bold]\x00[reset][red][bold]"`},
}

arr [3]int
Expand All @@ -116,6 +117,7 @@ var (
FooPri{Public: "hello", private: "world"},
new(regexp.Regexp),
unsafe.Pointer(new(regexp.Regexp)),
"日本\t語\n\000\U00101234a",
}
)

Expand Down