regex101: printf C99

Pro

%the literal % (37₁₀ / 45₈ / 25₁₆)

Group flag(?'flag'[-0+ #]{0,3})

Character Class[-0+ #]{0,3}

{0,3}matches between 0 and 3 characters from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

Group minwidth(?'minwidth'[0-9]*)

Character Class[0-9]*

*matches any number of characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group comma(?'comma'\.)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group precision(?'precision'(?('comma')[0-9]*))

Condition(?('comma')[0-9]*)

Uses the first branch if group comma matched

If the condition is true, match this branch:[0-9]*

Character Class[0-9]*

*matches any number of characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group length(?'length'[hlqLjzZt]|ll|hh)?

?repeats the group contents below at most once:

1st Alternative[hlqLjzZt]

Character Class[hlqLjzZt]

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

lthe literal l (108₁₀ / 154₈ / 6C₁₆) (case sensitive)

qthe literal q (113₁₀ / 161₈ / 71₁₆) (case sensitive)

Lthe literal L (76₁₀ / 114₈ / 4C₁₆) (case sensitive)

jthe literal j (106₁₀ / 152₈ / 6A₁₆) (case sensitive)

zthe literal z (122₁₀ / 172₈ / 7A₁₆) (case sensitive)

Zthe literal Z (90₁₀ / 132₈ / 5A₁₆) (case sensitive)

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

2nd Alternativell

llthe literal text ll (case sensitive)

3rd Alternativehh

hhthe literal text hh (case sensitive)

Group type(?'type'[dscuobS%nfeEgGaACDiIOUpXx]{1})

Character Class[dscuobS%nfeEgGaACDiIOUpXx]{1}

{1}matches one character from the set below:

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

uthe literal u (117₁₀ / 165₈ / 75₁₆) (case sensitive)

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Sthe literal S (83₁₀ / 123₈ / 53₁₆) (case sensitive)

%the literal % (37₁₀ / 45₈ / 25₁₆)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case sensitive)

fthe literal f (102₁₀ / 146₈ / 66₁₆) (case sensitive)

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

Ethe literal E (69₁₀ / 105₈ / 45₁₆) (case sensitive)

gthe literal g (103₁₀ / 147₈ / 67₁₆) (case sensitive)

Gthe literal G (71₁₀ / 107₈ / 47₁₆) (case sensitive)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

Athe literal A (65₁₀ / 101₈ / 41₁₆) (case sensitive)

Cthe literal C (67₁₀ / 103₈ / 43₁₆) (case sensitive)

Dthe literal D (68₁₀ / 104₈ / 44₁₆) (case sensitive)

ithe literal i (105₁₀ / 151₈ / 69₁₆) (case sensitive)

Ithe literal I (73₁₀ / 111₈ / 49₁₆) (case sensitive)

Othe literal O (79₁₀ / 117₈ / 4F₁₆) (case sensitive)

Uthe literal U (85₁₀ / 125₈ / 55₁₆) (case sensitive)

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

25 tokens

Regular Expression

%(?'flag'[-0+ #]{0,3})(?'minwidth'[0-9]*)(?'comma'\.)?(?'precision'(?('comma')[0-9]*))(?'length'[hlqLjzZt]|ll|hh)?(?'type'[dscuobS%nfeEgGaACDiIOUpXx]{1})

Unit Tests

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