Struct snapbox::Substitutions

pub struct Substitutions { /* private fields */ }

Match pattern expressions, see Assert

Built-in expressions:

• ... on a line of its own: match multiple complete lines
• [..]: match multiple characters within a line

Implementations

impl Substitutions

pub fn new() -> Self

pub fn insert( &mut self, key: &'static str, value: impl Into<Cow<'static, str>> ) -> Result<(), Error>

Insert an additional match pattern

key must be enclosed in [ and ].

let mut subst = snapbox::Substitutions::new();
subst.insert("[EXE]", std::env::consts::EXE_SUFFIX);

pub fn extend( &mut self, vars: impl IntoIterator<Item = (&'static str, impl Into<Cow<'static, str>>)> ) -> Result<(), Error>

Insert additional match patterns

keys must be enclosed in [ and ].

pub fn normalize(&self, input: &str, pattern: &str) -> String

Apply match pattern to input

If pattern matches input, then pattern is returned.

Otherwise, input, with as many patterns replaced as possible, will be returned.

let subst = snapbox::Substitutions::new();
let output = subst.normalize("Hello World!", "Hello [..]!");
assert_eq!(output, "Hello [..]!");

Trait Implementations

impl Clone for Substitutions

fn clone(&self) -> Substitutions

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Substitutions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Substitutions

fn default() -> Substitutions

Returns the “default value” for a type.

impl PartialEq for Substitutions

fn eq(&self, other: &Substitutions) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Substitutions

impl StructuralEq for Substitutions

impl StructuralPartialEq for Substitutions