cynic-parser 0.11.1

A fast, correct and easy to use GraphQL parser
Documentation 
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use std::{borrow::Cow, fmt};

use crate::common::trim_block_string_whitespace;

#[derive(Clone, Copy, Debug)]
pub struct StringLiteral<'a>(StringLiteralInner<'a>);

impl<'a> StringLiteral<'a> {
    pub(crate) fn new_string(inner: &'a str) -> Self {
        Self(StringLiteralInner::String(inner))
    }

    pub(crate) fn new_block(inner: &'a str) -> Self {
        Self(StringLiteralInner::BlockString(inner))
    }
}

#[derive(Clone, Copy, Debug)]
enum StringLiteralInner<'a> {
    String(&'a str),
    BlockString(&'a str),
}

#[derive(Clone, Copy, Debug)]
pub enum StringLiteralKind {
    String,
    Block,
}

impl<'a> StringLiteral<'a> {
    pub fn to_cow(&self) -> Cow<'a, str> {
        match self.0 {
            StringLiteralInner::String(string) => Cow::Borrowed(string),
            StringLiteralInner::BlockString(string) => {
                // This is more intense - we need to unquote the string
                //
                // TODO: Look into recording what work needs done at parse time
                Cow::Owned(trim_block_string_whitespace(string))
            }
        }
    }

    pub fn raw_untrimmed_str(&self) -> &'a str {
        match self.0 {
            StringLiteralInner::String(string) => string,
            StringLiteralInner::BlockString(string) => string,
        }
    }

    pub fn kind(&self) -> StringLiteralKind {
        match self.0 {
            StringLiteralInner::String(_) => StringLiteralKind::String,
            StringLiteralInner::BlockString(_) => StringLiteralKind::Block,
        }
    }
}

impl fmt::Display for StringLiteral<'_> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.write_str(self.to_cow().as_ref())
    }
}