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pub use self::brace_interpolate::*;
pub use self::dollar_interpolate::*;
mod brace_interpolate;
mod dollar_interpolate;
#[derive(Debug, PartialEq, Clone)]
pub enum InterpolationError {
InvalidChar(InvalidCharValue),
MissingVariable(String),
MissingPositionalVariable(usize),
NumberParse(NumberParseValue),
Unexpected(UnexpectedValue),
}
#[derive(Debug, PartialEq, Clone)]
pub struct InvalidCharValue {
pub found: char,
pub offset: usize,
}
#[derive(Debug, PartialEq, Clone)]
pub struct NumberParseValue {
pub offset: usize,
pub source: String,
pub error: String,
}
#[derive(Debug, PartialEq, Clone)]
pub struct UnexpectedValue {
pub template: String,
pub offset: usize,
pub code: String,
}
#[inline]
fn invalid_char_err(found: char, offset: usize)
-> InterpolationError {
InterpolationError::InvalidChar(InvalidCharValue { found, offset })
}
#[inline]
fn number_parse_err(offset: usize, source: String, error: String)
-> InterpolationError {
InterpolationError::NumberParse(NumberParseValue { offset, source, error })
}
#[inline]
fn unexpected_err<S1, S2>(s: S1, offset: usize, code: S2) -> InterpolationError
where S1: ToString, S2: ToString {
InterpolationError::Unexpected(UnexpectedValue {
template: s.to_string(), offset, code: code.to_string() })
}
const UPPER_SIZE: usize = 65536;
const LOWER_SIZE: usize = 256;
#[inline]
fn size_grow_up(n: usize) -> usize {
if n > UPPER_SIZE {
n + n >> 2
} else if n > LOWER_SIZE {
n + n >> 1
} else {
n + n
}
}
#[inline]
fn add_default_value(result: &mut String, default_value: Option<&str>, variable: String)
-> Result<(), InterpolationError> {
if let Some(some_default_value) = default_value {
result.push_str(some_default_value);
Ok(())
} else {
Err(InterpolationError::MissingVariable(variable))
}
}
#[inline]
fn add_default_value_positional(result: &mut String, default_value: Option<&str>, index: usize)
-> Result<(), InterpolationError> {
if let Some(some_default_value) = default_value {
result.push_str(some_default_value);
Ok(())
} else {
Err(InterpolationError::MissingPositionalVariable(index))
}
}