Enum Case

Variants

Upper

Uppercase strings are delimited by spaces and all characters are uppercase.

• Boundaries: Space
• Pattern: Uppercase
• Delimeter: Space

use convert_case::{Case, Casing};
assert_eq!("MY VARIABLE NAME", "My variable NAME".to_case(Case::Upper))

Lower

Lowercase strings are delimited by spaces and all characters are lowercase.

• Boundaries: Space
• Pattern: Lowercase
• Delimeter: Space

use convert_case::{Case, Casing};
assert_eq!("my variable name", "My variable NAME".to_case(Case::Lower))

Title

Title case strings are delimited by spaces. Only the leading character of each word is uppercase. No inferences are made about language, so words like "as", "to", and "for" will still be capitalized.

• Boundaries: Space
• Pattern: Capital
• Delimeter: Space

use convert_case::{Case, Casing};
assert_eq!("My Variable Name", "My variable NAME".to_case(Case::Title))

Sentence

Sentence case strings are delimited by spaces. Only the leading character of the first word is uppercase.

• Boundaries: Space
• Pattern: Capital
• Delimeter: Space

use convert_case::{Case, Casing};
assert_eq!("My variable name", "My variable NAME".to_case(Case::Sentence))

Toggle

Toggle case strings are delimited by spaces. All characters are uppercase except for the leading character of each word, which is lowercase.

• Boundaries: Space
• Pattern: Toggle
• Delimeter: Space

use convert_case::{Case, Casing};
assert_eq!("mY vARIABLE nAME", "My variable NAME".to_case(Case::Toggle))

Camel

Camel case strings are lowercase, but for every word except the first the first letter is capitalized.

• Boundaries: LowerUpper, DigitUpper, UpperDigit, DigitLower, LowerDigit, Acronym
• Pattern: Camel
• Delimeter: No delimeter

use convert_case::{Case, Casing};
assert_eq!("myVariableName", "My variable NAME".to_case(Case::Camel))

Pascal

Pascal case strings are lowercase, but for every word the first letter is capitalized.

• Boundaries: LowerUpper, DigitUpper, UpperDigit, DigitLower, LowerDigit, Acronym
• Pattern: Capital
• Delimeter: No delimeter

use convert_case::{Case, Casing};
assert_eq!("MyVariableName", "My variable NAME".to_case(Case::Pascal))

UpperCamel

Upper camel case is an alternative name for Pascal case.

Snake

Snake case strings are delimited by underscores _ and are all lowercase.

• Boundaries: Underscore
• Pattern: Lowercase
• Delimeter: Underscore _

use convert_case::{Case, Casing};
assert_eq!("my_variable_name", "My variable NAME".to_case(Case::Snake))

Constant

Constant case strings are delimited by underscores _ and are all uppercase.

• Boundaries: Underscore
• Pattern: Uppercase
• Delimeter: Underscore _

use convert_case::{Case, Casing};
assert_eq!("MY_VARIABLE_NAME", "My variable NAME".to_case(Case::Constant))

UpperSnake

Upper snake case is an alternative name for constant case.

Kebab

Kebab case strings are delimited by hyphens - and are all lowercase.

• Boundaries: Hyphen
• Pattern: Lowercase
• Delimeter: Hyphen -

use convert_case::{Case, Casing};
assert_eq!("my-variable-name", "My variable NAME".to_case(Case::Kebab))

Cobol

Cobol case strings are delimited by hyphens - and are all uppercase.

• Boundaries: Hyphen
• Pattern: Uppercase
• Delimeter: Hyphen -

use convert_case::{Case, Casing};
assert_eq!("MY-VARIABLE-NAME", "My variable NAME".to_case(Case::Cobol))

UpperKebab

Upper kebab case is an alternative name for Cobol case.

Train

Train case strings are delimited by hyphens -. All characters are lowercase except for the leading character of each word.

• Boundaries: Hyphen
• Pattern: Capital
• Delimeter: Hyphen -

use convert_case::{Case, Casing};
assert_eq!("My-Variable-Name", "My variable NAME".to_case(Case::Train))

Flat

Flat case strings are all lowercase, with no delimiter. Note that word boundaries are lost.

• Boundaries: No boundaries
• Pattern: Lowercase
• Delimeter: No delimeter

use convert_case::{Case, Casing};
assert_eq!("myvariablename", "My variable NAME".to_case(Case::Flat))

UpperFlat

Upper flat case strings are all uppercase, with no delimiter. Note that word boundaries are lost.

• Boundaries: No boundaries
• Pattern: Uppercase
• Delimeter: No delimeter

use convert_case::{Case, Casing};
assert_eq!("MYVARIABLENAME", "My variable NAME".to_case(Case::UpperFlat))

Alternating

Alternating case strings are delimited by spaces. Characters alternate between uppercase and lowercase.

• Boundaries: Space
• Pattern: Alternating
• Delimeter: Space

use convert_case::{Case, Casing};
assert_eq!("mY vArIaBlE nAmE", "My variable NAME".to_case(Case::Alternating));