lucas/serde_sjson
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feat: Implement serialization

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Lucas Schwiderski 2022-11-18 09:21:46 +01:00
commit 502c2a2986
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/target
/Cargo.lock
*.profraw
*.profdata

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[package]
name = "serde_sjson"
version = "0.1.0"
edition = "2021"
keywords = ["serde", "serialization", "sjson"]
description = "An SJSON serialization file format"
categories = ["encoding", "parser-implementations"]
[dependencies]
serde = { version = "1.0.147", default-features = false }
[dev-dependencies]
serde = { version = "1.0.147", features = ["derive"] }

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project := "serde_sjson"
default := "run"
run *ARGS:
cargo run -- {{ARGS}}
test *ARGS:
cargo test {{ARGS}}
coverage *ARGS:
RUSTFLAGS="-C instrument-coverage" cargo test --tests {{ARGS}} || true
cargo profdata -- merge -sparse default*.profraw -o {{project}}.profdata
rm default*.profraw
cov-report *ARGS:
#!/bin/bash
RUSTFLAGS="-C instrument-coverage" cargo test --tests {{ARGS}} || true
cargo profdata -- merge -sparse default*.profraw -o {{project}}.profdata
rm default*.profraw
cargo cov -- report \
$(for file in \
$(RUSTFLAGS="-C instrument-coverage" cargo test --tests --no-run --message-format=json\
| jq -r "select(.profile.test == true) | .filenames[]" \
| grep -v dSYM - \
); \
do \
printf "%s %s " -object $file; \
done \
) \
--use-color --ignore-filename-regex='/.cargo/registry' \
--instr-profile={{project}}.profdata --summary-only
cov-show *ARGS:
#!/bin/bash
RUSTFLAGS="-C instrument-coverage" cargo test --tests {{ARGS}} || true
cargo profdata -- merge -sparse default*.profraw -o {{project}}.profdata
rm default*.profraw
cargo cov -- show \
$(for file in \
$(RUSTFLAGS="-C instrument-coverage" cargo test --tests --no-run --message-format=json\
| jq -r "select(.profile.test == true) | .filenames[]" \
| grep -v dSYM - \
); \
do \
printf "%s %s " -object $file; \
done \
) \
--use-color --ignore-filename-regex='/.cargo/registry' \
--instr-profile={{project}}.profdata \
--show-instantiations --show-line-counts-or-regions \
--Xdemangler=rustfilt | bat

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USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

13
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= Serde SJSON
:idprefix:
:idseparator:
:toc: macro
:toclevels: 1
:!toc-title:
:caution-caption: :fire:
:important-caption: :exclamtion:
:note-caption: :paperclip:
:tip-caption: :bulb:
:warning-caption: :warning:
A __ser__ialization/__de__serialization library for __Simplified JSON__, specifically, the Bitsquid/Stingray flavor.

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pub struct Deserializer {}
impl serde::Deserializer for Deserializer {
type Error;
fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_i8<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_i16<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_i32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_i64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_u8<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_u16<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_u32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_u64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_f32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_f64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_unit_struct<V>(
self,
name: &'static str,
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_newtype_struct<V>(
self,
name: &'static str,
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_tuple<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_tuple_struct<V>(
self,
name: &'static str,
len: usize,
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_struct<V>(
self,
name: &'static str,
fields: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_enum<V>(
self,
name: &'static str,
variants: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
todo!()
}
}
pub fn from_str<T>() -> crate::Result<T> {}

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use std::{fmt, io};
pub type Result<T> = std::result::Result<T, Error>;
pub struct Error {
inner: Box<ErrorImpl>,
}
struct ErrorImpl {
code: ErrorCode,
line: usize,
column: usize,
}
// TODO: Remove once they are constructed
#[allow(dead_code)]
pub(crate) enum ErrorCode {
// Generic error built from a message or different error
Message(String),
// Wrap inner I/O errors
Io(io::Error),
Eof,
Syntax,
ExpectedTopLevelObject,
ExpectedBoolean,
ExpectedInteger,
ExpectedString,
ExpectedNull,
ExpectedArray,
ExpectedArrayEnd,
ExpectedMap,
ExpectedMapEquals,
ExpectedMapEnd,
TrailingCharacters,
}
impl fmt::Display for ErrorCode {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
ErrorCode::Message(msg) => f.write_str(msg),
ErrorCode::Io(err) => fmt::Display::fmt(err, f),
ErrorCode::Eof => f.write_str("unexpected end of input"),
ErrorCode::Syntax => f.write_str("syntax error"),
ErrorCode::ExpectedTopLevelObject => f.write_str("expected object at the top level"),
ErrorCode::ExpectedBoolean => f.write_str("expected a boolean value"),
ErrorCode::ExpectedInteger => f.write_str("expected an integer value"),
ErrorCode::ExpectedString => f.write_str("expected a string value"),
ErrorCode::ExpectedNull => f.write_str("expected null"),
ErrorCode::ExpectedArray => f.write_str("expected an array value"),
ErrorCode::ExpectedArrayEnd => f.write_str("expected an array end delimiter"),
ErrorCode::ExpectedMap => f.write_str("expected an object value"),
ErrorCode::ExpectedMapEquals => f.write_str("expected a '=' between key and value"),
ErrorCode::ExpectedMapEnd => f.write_str("expected an object end delimiter"),
ErrorCode::TrailingCharacters => f.write_str("unexpected trailing characters"),
}
}
}
impl fmt::Display for ErrorImpl {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.line == 0 {
fmt::Display::fmt(&self.code, f)
} else {
write!(
f,
"{} at line {} column {}",
self.code, self.line, self.column
)
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
fmt::Display::fmt(&self.inner, f)
}
}
impl fmt::Debug for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"Error({:?}, line: {}, column: {})",
self.inner.code.to_string(),
self.inner.line,
self.inner.column
)
}
}
impl serde::de::Error for Error {
fn custom<T>(msg: T) -> Self
where
T: ToString,
{
let inner = Box::new(ErrorImpl {
code: ErrorCode::Message(msg.to_string()),
line: 0,
column: 0,
});
Self { inner }
}
}
impl serde::ser::Error for Error {
fn custom<T>(msg: T) -> Self
where
T: ToString,
{
let inner = Box::new(ErrorImpl {
code: ErrorCode::Message(msg.to_string()),
line: 0,
column: 0,
});
Self { inner }
}
}
impl std::error::Error for Error {}
impl Error {
pub(crate) fn new(code: ErrorCode, line: usize, column: usize) -> Self {
Self {
inner: Box::new(ErrorImpl { code, line, column }),
}
}
}

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// mod de;
mod error;
mod ser;
// pub use de::{from_str, Deserializer};
pub use error::{Error, Result};
pub use ser::{to_string, Serializer};

516
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use serde::Serialize;
use crate::error::{Error, ErrorCode, Result};
// TODO: Make configurable
const INDENT: &str = " ";
pub struct Serializer {
// The current indentation level
level: usize,
// The output string
output: String,
}
pub fn to_string<T>(value: &T) -> Result<String>
where
T: Serialize,
{
let mut serializer = Serializer {
level: 0,
output: String::new(),
};
value.serialize(&mut serializer)?;
Ok(serializer.output)
}
impl Serializer {
fn add_indent(&mut self) {
for _ in 0..self.level.saturating_sub(1) {
self.output += INDENT;
}
}
fn ensure_top_level_struct(&self) -> Result<()> {
if self.level == 0 {
return Err(Error::new(ErrorCode::ExpectedTopLevelObject, 0, 0));
}
Ok(())
}
}
impl<'a> serde::ser::Serializer for &'a mut Serializer {
type Ok = ();
type Error = Error;
type SerializeSeq = Self;
type SerializeTuple = Self;
type SerializeTupleStruct = Self;
type SerializeTupleVariant = Self;
type SerializeMap = Self;
type SerializeStruct = Self;
type SerializeStructVariant = Self;
fn serialize_bool(self, v: bool) -> Result<Self::Ok> {
self.ensure_top_level_struct()?;
self.output += if v { "true" } else { "false" };
Ok(())
}
fn serialize_i8(self, v: i8) -> Result<Self::Ok> {
self.serialize_i64(v.into())
}
fn serialize_i16(self, v: i16) -> Result<Self::Ok> {
self.serialize_i64(v.into())
}
fn serialize_i32(self, v: i32) -> Result<Self::Ok> {
self.serialize_i64(v.into())
}
fn serialize_i64(self, v: i64) -> Result<Self::Ok> {
self.ensure_top_level_struct()?;
self.output += &v.to_string();
Ok(())
}
fn serialize_u8(self, v: u8) -> Result<Self::Ok> {
self.serialize_u64(v.into())
}
fn serialize_u16(self, v: u16) -> Result<Self::Ok> {
self.serialize_u64(v.into())
}
fn serialize_u32(self, v: u32) -> Result<Self::Ok> {
self.serialize_u64(v.into())
}
fn serialize_u64(self, v: u64) -> Result<Self::Ok> {
self.ensure_top_level_struct()?;
self.output += &v.to_string();
Ok(())
}
fn serialize_f32(self, v: f32) -> Result<Self::Ok> {
if v.is_finite() {
self.serialize_f64(v.into())
} else {
self.ensure_top_level_struct()?;
self.output += "null";
Ok(())
}
}
fn serialize_f64(self, v: f64) -> Result<Self::Ok> {
self.ensure_top_level_struct()?;
if v.is_finite() {
self.output += &v.to_string();
} else {
self.output += "null";
}
Ok(())
}
fn serialize_char(self, v: char) -> Result<Self::Ok> {
let mut buf = [0; 4];
self.serialize_str(v.encode_utf8(&mut buf))
}
fn serialize_str(self, v: &str) -> Result<Self::Ok> {
self.ensure_top_level_struct()?;
let needs_escapes =
v.is_empty() || v.contains([' ', '\n', '\r', '\t', '=', '\'', '"', '\\', '/']);
if needs_escapes {
self.output += "\"";
let len = v.len();
let chars = v.chars();
let mut start = 0;
for (i, c) in chars.enumerate() {
if ('\x20'..='\x7e').contains(&c)
&& !['\t', '\n', '\r', '\"', '\\', '/'].contains(&c)
{
continue;
}
self.output += &v[start..i];
self.output.push('\\');
match c {
'\t' => {
self.output.push('t');
}
'\n' => {
self.output.push('n');
}
'\r' => {
self.output.push('r');
}
'\x7f'.. => {
self.output += &format!("u{:4x}", c as u32);
}
c => {
self.output.push(c);
}
};
start = i + 1;
}
if start < len {
self.output += &v[start..];
}
self.output += "\"";
} else {
self.output += v;
}
Ok(())
}
fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok> {
todo!()
}
fn serialize_none(self) -> Result<Self::Ok> {
self.serialize_unit()
}
fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok>
where
T: serde::Serialize,
{
self.ensure_top_level_struct()?;
// A present value is represented as just that value.
// Just like JSON, we do not distinguish between `None` and `Some(())`.
value.serialize(self)
}
fn serialize_unit(self) -> Result<Self::Ok> {
self.ensure_top_level_struct()?;
self.output += "null";
Ok(())
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok> {
self.serialize_unit()
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
) -> Result<Self::Ok> {
self.serialize_str(variant)
}
fn serialize_newtype_struct<T: ?Sized>(self, _name: &'static str, value: &T) -> Result<Self::Ok>
where
T: serde::Serialize,
{
self.ensure_top_level_struct()?;
value.serialize(self)
}
// Serialize an externally tagged enum: `{ NAME = VALUE }`.
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Self::Ok>
where
T: serde::Serialize,
{
self.ensure_top_level_struct()?;
self.output += "{ ";
variant.serialize(&mut *self)?;
self.output += " = ";
value.serialize(&mut *self)?;
self.output += " }\n";
Ok(())
}
// Serialize the start of a sequence.
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq> {
self.ensure_top_level_struct()?;
self.output += "[\n";
self.level += 1;
Ok(self)
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple> {
// SJSON, like JSON, does not distinguish a tuple from an array.
self.serialize_seq(Some(len))
}
fn serialize_tuple_struct(
self,
_name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct> {
// A tuple struct also serializes into an array.
self.serialize_seq(Some(len))
}
// Serialize the externally tagged representation of tuple structs: `{ NAME = [DATA...] }`.
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleVariant> {
self.ensure_top_level_struct()?;
variant.serialize(&mut *self)?;
self.output += " = [\n";
self.level += 1;
Ok(self)
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap> {
if self.level > 0 {
self.output += "{\n";
}
self.level += 1;
Ok(self)
}
fn serialize_struct(self, _name: &'static str, len: usize) -> Result<Self::SerializeStruct> {
self.serialize_map(Some(len))
}
// Serialize the externally tagged representation: `{ NAME = { K = V, ... } }`.
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant> {
self.ensure_top_level_struct()?;
variant.serialize(&mut *self)?;
self.output += " = {\n";
self.level += 1;
Ok(self)
}
fn collect_str<T: ?Sized>(self, value: &T) -> Result<Self::Ok>
where
T: std::fmt::Display,
{
self.serialize_str(&value.to_string())
}
}
impl<'a> serde::ser::SerializeSeq for &'a mut Serializer {
type Ok = ();
type Error = Error;
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<()>
where
T: Serialize,
{
self.add_indent();
value.serialize(&mut **self)?;
if !self.output.ends_with('\n') {
self.output += "\n";
}
Ok(())
}
fn end(self) -> Result<Self::Ok> {
self.level -= 1;
self.add_indent();
self.output += "]\n";
Ok(())
}
}
impl<'a> serde::ser::SerializeTuple for &'a mut Serializer {
type Ok = ();
type Error = Error;
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<()>
where
T: Serialize,
{
self.add_indent();
value.serialize(&mut **self)?;
if !self.output.ends_with('\n') {
self.output += "\n";
}
Ok(())
}
fn end(self) -> Result<Self::Ok> {
self.level -= 1;
self.add_indent();
self.output += "]\n";
Ok(())
}
}
impl<'a> serde::ser::SerializeTupleStruct for &'a mut Serializer {
type Ok = ();
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<()>
where
T: Serialize,
{
self.add_indent();
value.serialize(&mut **self)?;
if !self.output.ends_with('\n') {
self.output += "\n";
}
Ok(())
}
fn end(self) -> Result<Self::Ok> {
self.level -= 1;
self.add_indent();
self.output += "]\n";
Ok(())
}
}
impl<'a> serde::ser::SerializeTupleVariant for &'a mut Serializer {
type Ok = ();
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<()>
where
T: Serialize,
{
self.add_indent();
value.serialize(&mut **self)?;
if !self.output.ends_with('\n') {
self.output += "\n";
}
Ok(())
}
fn end(self) -> Result<Self::Ok> {
self.level -= 1;
self.add_indent();
self.output += "]\n";
self.level -= 1;
if self.level > 0 {
self.add_indent();
self.output += "}\n";
}
Ok(())
}
}
impl<'a> serde::ser::SerializeMap for &'a mut Serializer {
type Ok = ();
type Error = Error;
fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<()>
where
T: Serialize,
{
self.add_indent();
key.serialize(&mut **self)
}
fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<()>
where
T: Serialize,
{
// It doesn't make a difference where the `=` is added. But doing it here
// means `serialize_key` is only a call to a different function, which should
// have greater optimization potential for the compiler.
self.output += " = ";
value.serialize(&mut **self)?;
if !self.output.ends_with('\n') {
self.output += "\n";
}
Ok(())
}
fn end(self) -> Result<Self::Ok> {
if self.level > 1 {
self.level -= 1;
self.add_indent();
self.output += "}\n";
}
Ok(())
}
}
impl<'a> serde::ser::SerializeStruct for &'a mut Serializer {
type Ok = ();
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<()>
where
T: Serialize,
{
self.add_indent();
key.serialize(&mut **self)?;
self.output += " = ";
value.serialize(&mut **self)?;
if !self.output.ends_with('\n') {
self.output += "\n";
}
Ok(())
}
fn end(self) -> Result<Self::Ok> {
if self.level > 1 {
self.level -= 1;
self.add_indent();
self.output += "}\n";
}
Ok(())
}
}
impl<'a> serde::ser::SerializeStructVariant for &'a mut Serializer {
type Ok = ();
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<()>
where
T: Serialize,
{
self.add_indent();
key.serialize(&mut **self)?;
self.output += " = ";
value.serialize(&mut **self)?;
if !self.output.ends_with('\n') {
self.output += "\n";
}
Ok(())
}
fn end(self) -> Result<Self::Ok> {
if self.level > 0 {
self.level -= 1;
self.add_indent();
self.output += "}\n";
}
Ok(())
}
}

563
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use serde_sjson::to_string;
#[test]
fn serialize_null() {
#[derive(serde::Serialize)]
struct Value {
value: (),
}
let value = Value { value: () };
let expected = String::from("value = null\n");
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
#[test]
fn serialize_u64() {
#[derive(serde::Serialize)]
struct Value {
value: u64,
}
let tests = [u64::MIN, 4, u64::MAX];
for value in tests {
let expected = format!("value = {}\n", value);
let value = Value { value };
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
}
#[test]
fn serialize_i64() {
#[derive(serde::Serialize)]
struct Value {
value: i64,
}
let tests = [i64::MIN, -6, 0, 4, i64::MAX];
for value in tests {
let expected = format!("value = {}\n", value);
let value = Value { value };
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
}
#[test]
fn serialize_f64() {
#[derive(serde::Serialize)]
struct Value {
value: f64,
}
let tests = [
f64::MIN,
-12.3456,
4.3,
f64::MAX,
f64::EPSILON,
std::f64::consts::PI,
];
for value in tests {
let expected = format!("value = {}\n", value);
let value = Value { value };
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
}
#[test]
fn serialize_non_representable_floats() {
#[derive(serde::Serialize)]
struct Value64 {
value: f64,
}
#[derive(serde::Serialize)]
struct Value32 {
value: f32,
}
let tests = [std::f64::NAN, std::f64::INFINITY, std::f64::NEG_INFINITY];
let expected = String::from("value = null\n");
for value in tests {
let value = Value64 { value };
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
let tests = [std::f32::NAN, std::f32::INFINITY, std::f32::NEG_INFINITY];
for value in tests {
let value = Value32 { value };
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
}
#[test]
fn serialize_bool() {
#[derive(serde::Serialize)]
struct Value {
value: bool,
}
let tests = [true, false];
for value in tests {
let expected = format!("value = {}\n", value);
let value = Value { value };
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
}
#[test]
fn serialize_string() {
#[derive(serde::Serialize)]
struct Value {
value: String,
}
let tests = [
("", "\"\""),
("foo", "foo"),
("foo bar", "\"foo bar\""),
("foo\nbar", "\"foo\\nbar\""),
("foo\r\nbar", "\"foo\\r\\nbar\""),
("foo\tbar", "\"foo\\tbar\""),
("foo/bar", "\"foo\\/bar\""),
("foo\\bar", "\"foo\\\\bar\""),
];
for (value, expected) in tests {
let expected = format!("value = {}\n", expected);
let value = Value {
value: value.to_string(),
};
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
}
#[test]
fn serialize_char() {
#[derive(serde::Serialize)]
struct Value {
value: String,
}
let tests = [
(' ', "\" \""),
('f', "f"),
('\n', "\"\\n\""),
('\t', "\"\\t\""),
('\r', "\"\\r\""),
('\\', "\"\\\\\""),
('/', "\"\\/\""),
('\"', "\"\\\"\""),
('\'', "\"'\""),
];
for (value, expected) in tests {
let expected = format!("value = {}\n", expected);
let value = Value {
value: value.to_string(),
};
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
}
#[test]
fn serialize_vec_of_strings() {
#[derive(serde::Serialize)]
struct Value {
value: Vec<&'static str>,
}
let value = Value {
value: vec!["foo", "foo bar", "foo123"],
};
let expected = String::from(
"\
value = [
foo
\"foo bar\"
foo123
]
",
);
let actual = to_string(&value).unwrap();
assert_eq!(actual, expected);
}
#[test]
fn serialize_nested_vec_of_numbers() {
#[derive(serde::Serialize)]
struct Value {
value: Vec<u64>,
}
let value = Value {
value: vec![0, 1, 1234],
};
let actual = to_string(&value).unwrap();
let expected = String::from(
"\
value = [
0
1
1234
]
",
);
assert_eq!(actual, expected);
}
#[test]
fn serialize_flat_struct() {
#[derive(serde::Serialize)]
#[serde(tag = "animal")]
struct Cat {
name: String,
lives: usize,
}
let luna = Cat {
name: String::from("Luna"),
lives: 9,
};
let actual = to_string(&luna).unwrap();
let expected = String::from("animal = Cat\nname = Luna\nlives = 9\n");
assert_eq!(actual, expected);
}
#[test]
fn serialize_list_of_structs() {
#[derive(serde::Serialize)]
struct Dog {
name: String,
}
let buddy = Dog {
name: String::from("Buddy"),
};
let lotta = Dog {
name: String::from("Lotta"),
};
#[derive(serde::Serialize)]
struct Value {
value: Vec<Dog>,
}
{
let actual = to_string(&Value {
value: vec![buddy, lotta],
})
.unwrap();
let expected = String::from(
"\
value = [
{
name = Buddy
}
{
name = Lotta
}
]
",
);
assert_eq!(actual, expected);
}
}
#[test]
fn serialize_nested_struct() {
#[derive(serde::Serialize)]
struct Dog {
name: String,
}
#[derive(serde::Serialize)]
struct DogHouse<'a> {
dog: &'a Dog,
size: usize,
}
let buddy = Dog {
name: String::from("Buddy"),
};
let value = DogHouse {
dog: &buddy,
size: 50,
};
let actual = to_string(&value).unwrap();
let expected = String::from(
"\
dog = {
name = Buddy
}
size = 50
",
);
assert_eq!(actual, expected);
}
#[test]
fn serialize_deeply_nested_struct() {
#[derive(serde::Serialize)]
struct Dog {
name: String,
}
#[derive(serde::Serialize)]
struct Cat {
name: String,
}
#[derive(serde::Serialize)]
struct DogHouse {
dog: Dog,
size: usize,
}
#[derive(serde::Serialize)]
struct Garden {
dog_house: DogHouse,
cat: Cat,
}
let value = Garden {
dog_house: DogHouse {
dog: Dog {
name: String::from("Buddy"),
},
size: 50,
},
cat: Cat {
name: String::from("Luna"),
},
};
let actual = to_string(&value).unwrap();
let expected = String::from(
"\
dog_house = {
dog = {
name = Buddy
}
size = 50
}
cat = {
name = Luna
}
",
);
assert_eq!(actual, expected);
}
#[test]
fn serialize_struct_with_vec_of_structs() {
#[derive(serde::Serialize)]
struct Dog {
name: String,
}
let buddy = Dog {
name: String::from("Buddy"),
};
let lotta = Dog {
name: String::from("Lotta"),
};
#[derive(serde::Serialize)]
struct DogHotel<'a> {
dogs: Vec<&'a Dog>,
}
let value = DogHotel {
dogs: vec![&buddy, &lotta],
};
let actual = to_string(&value).unwrap();
let expected = String::from(
"\
dogs = [
{
name = Buddy
}
{
name = Lotta
}
]
",
);
assert_eq!(actual, expected);
}
#[test]
fn serialize_enum_variant() {
#[derive(serde::Serialize)]
enum Color {
Red,
}
#[derive(serde::Serialize)]
struct Value {
value: Color,
}
let value = Value { value: Color::Red };
assert_eq!(to_string(&value).unwrap(), String::from("value = Red\n"));
}
#[test]
fn serialize_enum_newtype_variant() {
#[derive(serde::Serialize)]
enum Variant {
Int(i64),
}
#[derive(serde::Serialize)]
struct Value {
value: Variant,
}
let value = Value {
value: Variant::Int(13),
};
assert_eq!(
to_string(&value).unwrap(),
String::from("value = { Int = 13 }\n")
);
}
#[test]
fn serialize_enum_tagged_variant() {
#[derive(serde::Serialize)]
#[serde(tag = "variant", content = "value")]
enum TaggedVariant {
Int(i64),
}
#[derive(serde::Serialize)]
struct Value {
value: TaggedVariant,
}
let value = Value {
value: TaggedVariant::Int(13),
};
assert_eq!(
to_string(&value).unwrap(),
String::from(
"\
value = {
variant = Int
value = 13
}
"
)
);
}
#[test]
fn serialize_tuple_single() {
#[derive(serde::Serialize)]
struct Value {
value: ((),),
}
let value = Value { value: ((),) };
assert_eq!(
to_string(&value).unwrap(),
String::from("value = [\n null\n]\n")
);
}
#[test]
fn serialize_tuple_multiple_unit() {
#[derive(serde::Serialize)]
struct Value {
value: ((), ()),
}
let value = Value { value: ((), ()) };
assert_eq!(
to_string(&value).unwrap(),
String::from("value = [\n null\n null\n]\n")
);
}
#[test]
fn serialize_tuple_multiple_value() {
#[derive(serde::Serialize)]
struct Value {
value: (&'static str, bool),
}
let value = Value {
value: ("foo", false),
};
assert_eq!(
to_string(&value).unwrap(),
String::from("value = [\n foo\n false\n]\n")
);
}
#[test]
fn serialize_option_unit() {
#[derive(serde::Serialize)]
struct Value {
value: Option<()>,
}
let value = Value { value: None };
assert_eq!(to_string(&value).unwrap(), String::from("value = null\n"));
let value = Value { value: Some(()) };
assert_eq!(to_string(&value).unwrap(), String::from("value = null\n"));
}
#[test]
fn serialize_option_number() {
#[derive(serde::Serialize)]
struct Value {
value: Option<u64>,
}
let value = Value { value: None };
assert_eq!(to_string(&value).unwrap(), String::from("value = null\n"));
let value = Value { value: Some(1234) };
assert_eq!(to_string(&value).unwrap(), String::from("value = 1234\n"));
}
#[test]
fn serialize_option_string() {
#[derive(serde::Serialize)]
struct Value {
value: Option<String>,
}
let value = Value { value: None };
assert_eq!(to_string(&value).unwrap(), String::from("value = null\n"));
let value = Value {
value: Some(String::from("foo")),
};
assert_eq!(to_string(&value).unwrap(), String::from("value = foo\n"));
let value = Value {
value: Some(String::from("foo bar")),
};
assert_eq!(
to_string(&value).unwrap(),
String::from("value = \"foo bar\"\n")
);
}