Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
g

Test String

Code Generator

Language

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r"(?:font)[\ ]+([A-Za-z0-9\=\:]+)[\}\ \}]").unwrap(); let string = "conky.config = { -- ------------------------- Windows Settings own_window = true, own_window_type = 'normal', own_window_transparent = false, own_window_hints = 'undecorated,sticky,below,skip_taskbar,skip_pager', own_window_argb_visual = true, own_window_argb_value = 0, double_buffer = true, background = true, -- ------------------------- Position alignment = 'bottom_left', minimum_width = 295, minimum_height = 155, maximum_width = 313, gap_x = 1252, gap_y = 155, border_inner_margin = 0, border_outer_margin = 0, border_width = 0, -- ------------------------- Font use_xft = true, xftalpha = 0.8, override_utf8_locale = true, draw_shades = true, default_shade_color = 'black', draw_borders = false, draw_outline = false, font = 'Monofur:bold:size=8', -- ------------------------- Color default_color = 'DCDCDC', color0 = '1793d0', color1 = 'DDDDDD', color2 = 'AAAAAA', color3 = '888888', -- ------------------------- OTHER update_interval = 1, lua_load = '~/.conky/ConkyBar/lua/net_graph.lua', lua_draw_hook_pre = 'main_graph', }; conky.text = [[ ${color DCDCDC} ${color DCDCDC } ${if_existing /proc/net/route enp8s0}${voffset 25}${goto 50}${font}Network${image ~/.conky/ConkyBar/img/networkhigh.png -p 0,15} ${goto 50}${font}Public ip: ${font Monofur:size=8}${texeci 36000 wget -qO - http://ip.tupeux.com | tail} ${voffset 81}${goto 50}${font}Recieve: ${font Monofur:size=8}${downspeed enp8s0}${goto 210}${font}Send: ${font Monofur:size=8}${upspeed enp8s0}${else}${if_existing /proc/net/route wlp2s0}${voffset 25}${goto 50}${font}Network ${goto 50}${font}Public ip: ${font Monofur:size=8}${texeci 36000 wget -qO - http://ip.tupeux.com | tail}${goto 210}${font}Sign: ${font Monofur:size=8}${wireless_link_qual_perc wlp2s0}% ${voffset 81}${goto 50}${font}Recieve: ${font Monofur:size=8}${downspeed wlp2s0}${goto 210}${font}Send: ${font Monofur:size=8}${upspeed wlp2s0} ${if_match \"${wireless_link_qual_perc wlp2s0}\"<\"33\"}${image ~/.conky/ConkyBar/img/networklow.png -p 0,15 -s 45x45}${else}${if_match \"${wireless_link_qual_perc wlp2s0}\"<\"66\"}${image ~/.conky/ConkyBar/img/networkmid.png -p 0,15}${else}${image ~/.conky/ConkyBar/img/networkhigh.png -p 0,15}${endif}${endif}${else}${voffset 27}${goto 50}${font}Network${image ~/.conky/ConkyBar/img/nonetwork.png -p 0,15} ${goto 50}No connection${endif}${endif} ]];"; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/