1870 lines
53 KiB
Rust
1870 lines
53 KiB
Rust
//! Serializing Rust structures into TOML.
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//!
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//! This module contains all the Serde support for serializing Rust structures
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//! into TOML documents (as strings). Note that some top-level functions here
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//! are also provided at the top of the crate.
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//!
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//! Note that the TOML format has a restriction that if a table itself contains
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//! tables, all keys with non-table values must be emitted first. This is
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//! typically easy to ensure happens when you're defining a `struct` as you can
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//! reorder the fields manually, but when working with maps (such as `BTreeMap`
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//! or `HashMap`) this can lead to serialization errors. In those situations you
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//! may use the `tables_last` function in this module like so:
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//!
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//! ```rust
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//! # use serde_derive::Serialize;
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//! # use std::collections::HashMap;
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//! #[derive(Serialize)]
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//! struct Manifest {
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//! package: Package,
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//! #[serde(serialize_with = "toml::ser::tables_last")]
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//! dependencies: HashMap<String, Dependency>,
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//! }
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//! # type Package = String;
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//! # type Dependency = String;
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//! # fn main() {}
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//! ```
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use std::cell::Cell;
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use std::error;
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use std::fmt::{self, Write};
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use std::marker;
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use std::rc::Rc;
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use crate::datetime;
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use serde::ser;
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/// Serialize the given data structure as a TOML byte vector.
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///
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/// Serialization can fail if `T`'s implementation of `Serialize` decides to
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/// fail, if `T` contains a map with non-string keys, or if `T` attempts to
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/// serialize an unsupported datatype such as an enum, tuple, or tuple struct.
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pub fn to_vec<T: ?Sized>(value: &T) -> Result<Vec<u8>, Error>
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where
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T: ser::Serialize,
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{
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to_string(value).map(|e| e.into_bytes())
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}
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/// Serialize the given data structure as a String of TOML.
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///
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/// Serialization can fail if `T`'s implementation of `Serialize` decides to
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/// fail, if `T` contains a map with non-string keys, or if `T` attempts to
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/// serialize an unsupported datatype such as an enum, tuple, or tuple struct.
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///
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/// # Examples
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///
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/// ```
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/// use serde_derive::Serialize;
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///
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/// #[derive(Serialize)]
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/// struct Config {
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/// database: Database,
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/// }
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///
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/// #[derive(Serialize)]
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/// struct Database {
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/// ip: String,
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/// port: Vec<u16>,
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/// connection_max: u32,
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/// enabled: bool,
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/// }
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///
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/// fn main() {
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/// let config = Config {
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/// database: Database {
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/// ip: "192.168.1.1".to_string(),
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/// port: vec![8001, 8002, 8003],
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/// connection_max: 5000,
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/// enabled: false,
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/// },
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/// };
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///
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/// let toml = toml::to_string(&config).unwrap();
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/// println!("{}", toml)
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/// }
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/// ```
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pub fn to_string<T: ?Sized>(value: &T) -> Result<String, Error>
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where
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T: ser::Serialize,
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{
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let mut dst = String::with_capacity(128);
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value.serialize(&mut Serializer::new(&mut dst))?;
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Ok(dst)
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}
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/// Serialize the given data structure as a "pretty" String of TOML.
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///
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/// This is identical to `to_string` except the output string has a more
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/// "pretty" output. See `Serializer::pretty` for more details.
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pub fn to_string_pretty<T: ?Sized>(value: &T) -> Result<String, Error>
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where
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T: ser::Serialize,
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{
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let mut dst = String::with_capacity(128);
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value.serialize(&mut Serializer::pretty(&mut dst))?;
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Ok(dst)
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}
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/// Errors that can occur when serializing a type.
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#[derive(Debug, PartialEq, Eq, Clone)]
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pub enum Error {
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/// Indicates that a Rust type was requested to be serialized but it was not
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/// supported.
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///
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/// Currently the TOML format does not support serializing types such as
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/// enums, tuples and tuple structs.
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UnsupportedType,
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/// The key of all TOML maps must be strings, but serialization was
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/// attempted where the key of a map was not a string.
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KeyNotString,
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/// An error that we never omit but keep for backwards compatibility
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#[doc(hidden)]
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KeyNewline,
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/// Arrays in TOML must have a homogenous type, but a heterogeneous array
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/// was emitted.
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ArrayMixedType,
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/// All values in a TOML table must be emitted before further tables are
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/// emitted. If a value is emitted *after* a table then this error is
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/// generated.
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ValueAfterTable,
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/// A serialized date was invalid.
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DateInvalid,
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/// A serialized number was invalid.
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NumberInvalid,
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/// None was attempted to be serialized, but it's not supported.
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UnsupportedNone,
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/// A custom error which could be generated when serializing a particular
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/// type.
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Custom(String),
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#[doc(hidden)]
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__Nonexhaustive,
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}
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#[derive(Debug, Default, Clone)]
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#[doc(hidden)]
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/// Internal place for holding array setings
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struct ArraySettings {
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indent: usize,
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trailing_comma: bool,
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}
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impl ArraySettings {
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fn pretty() -> ArraySettings {
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ArraySettings {
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indent: 4,
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trailing_comma: true,
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}
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}
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}
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#[doc(hidden)]
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#[derive(Debug, Default, Clone)]
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/// String settings
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struct StringSettings {
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/// Whether to use literal strings when possible
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literal: bool,
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}
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impl StringSettings {
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fn pretty() -> StringSettings {
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StringSettings { literal: true }
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}
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}
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#[derive(Debug, Default, Clone)]
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#[doc(hidden)]
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/// Internal struct for holding serialization settings
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struct Settings {
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array: Option<ArraySettings>,
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string: Option<StringSettings>,
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}
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/// Serialization implementation for TOML.
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///
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/// This structure implements serialization support for TOML to serialize an
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/// arbitrary type to TOML. Note that the TOML format does not support all
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/// datatypes in Rust, such as enums, tuples, and tuple structs. These types
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/// will generate an error when serialized.
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///
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/// Currently a serializer always writes its output to an in-memory `String`,
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/// which is passed in when creating the serializer itself.
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pub struct Serializer<'a> {
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dst: &'a mut String,
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state: State<'a>,
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settings: Rc<Settings>,
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}
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#[derive(Debug, Clone)]
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enum State<'a> {
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Table {
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key: &'a str,
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parent: &'a State<'a>,
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first: &'a Cell<bool>,
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table_emitted: &'a Cell<bool>,
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},
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Array {
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parent: &'a State<'a>,
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first: &'a Cell<bool>,
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type_: &'a Cell<Option<&'static str>>,
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len: Option<usize>,
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},
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End,
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}
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#[doc(hidden)]
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pub struct SerializeSeq<'a, 'b> {
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ser: &'b mut Serializer<'a>,
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first: Cell<bool>,
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type_: Cell<Option<&'static str>>,
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len: Option<usize>,
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}
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#[doc(hidden)]
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pub enum SerializeTable<'a, 'b> {
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Datetime(&'b mut Serializer<'a>),
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Table {
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ser: &'b mut Serializer<'a>,
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key: String,
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first: Cell<bool>,
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table_emitted: Cell<bool>,
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},
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}
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impl<'a> Serializer<'a> {
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/// Creates a new serializer which will emit TOML into the buffer provided.
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///
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/// The serializer can then be used to serialize a type after which the data
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/// will be present in `dst`.
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pub fn new(dst: &'a mut String) -> Serializer<'a> {
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Serializer {
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dst,
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state: State::End,
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settings: Rc::new(Settings::default()),
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}
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}
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/// Instantiate a "pretty" formatter
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///
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/// By default this will use:
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///
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/// - pretty strings: strings with newlines will use the `'''` syntax. See
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/// `Serializer::pretty_string`
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/// - pretty arrays: each item in arrays will be on a newline, have an indentation of 4 and
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/// have a trailing comma. See `Serializer::pretty_array`
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pub fn pretty(dst: &'a mut String) -> Serializer<'a> {
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Serializer {
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dst,
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state: State::End,
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settings: Rc::new(Settings {
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array: Some(ArraySettings::pretty()),
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string: Some(StringSettings::pretty()),
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}),
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}
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}
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/// Enable or Disable pretty strings
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///
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/// If enabled, literal strings will be used when possible and strings with
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/// one or more newlines will use triple quotes (i.e.: `'''` or `"""`)
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///
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/// # Examples
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///
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/// Instead of:
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///
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/// ```toml,ignore
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/// single = "no newlines"
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/// text = "\nfoo\nbar\n"
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/// ```
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///
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/// You will have:
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///
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/// ```toml,ignore
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/// single = 'no newlines'
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/// text = '''
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/// foo
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/// bar
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/// '''
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/// ```
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pub fn pretty_string(&mut self, value: bool) -> &mut Self {
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Rc::get_mut(&mut self.settings).unwrap().string = if value {
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Some(StringSettings::pretty())
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} else {
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None
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};
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self
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}
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/// Enable or Disable Literal strings for pretty strings
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///
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/// If enabled, literal strings will be used when possible and strings with
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/// one or more newlines will use triple quotes (i.e.: `'''` or `"""`)
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///
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/// If disabled, literal strings will NEVER be used and strings with one or
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/// more newlines will use `"""`
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///
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/// # Examples
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///
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/// Instead of:
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///
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/// ```toml,ignore
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/// single = "no newlines"
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/// text = "\nfoo\nbar\n"
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/// ```
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///
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/// You will have:
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///
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/// ```toml,ignore
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/// single = "no newlines"
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/// text = """
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/// foo
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/// bar
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/// """
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/// ```
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pub fn pretty_string_literal(&mut self, value: bool) -> &mut Self {
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let use_default = if let Some(ref mut s) = Rc::get_mut(&mut self.settings).unwrap().string {
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s.literal = value;
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false
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} else {
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true
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};
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if use_default {
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let mut string = StringSettings::pretty();
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string.literal = value;
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Rc::get_mut(&mut self.settings).unwrap().string = Some(string);
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}
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self
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}
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/// Enable or Disable pretty arrays
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///
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/// If enabled, arrays will always have each item on their own line.
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///
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/// Some specific features can be controlled via other builder methods:
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///
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/// - `Serializer::pretty_array_indent`: set the indent to a value other
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/// than 4.
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/// - `Serializer::pretty_array_trailing_comma`: enable/disable the trailing
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/// comma on the last item.
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///
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/// # Examples
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///
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/// Instead of:
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///
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/// ```toml,ignore
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/// array = ["foo", "bar"]
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/// ```
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///
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/// You will have:
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///
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/// ```toml,ignore
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/// array = [
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/// "foo",
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/// "bar",
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/// ]
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/// ```
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pub fn pretty_array(&mut self, value: bool) -> &mut Self {
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Rc::get_mut(&mut self.settings).unwrap().array = if value {
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Some(ArraySettings::pretty())
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} else {
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None
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};
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self
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}
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/// Set the indent for pretty arrays
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///
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/// See `Serializer::pretty_array` for more details.
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pub fn pretty_array_indent(&mut self, value: usize) -> &mut Self {
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let use_default = if let Some(ref mut a) = Rc::get_mut(&mut self.settings).unwrap().array {
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a.indent = value;
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false
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} else {
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true
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};
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if use_default {
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let mut array = ArraySettings::pretty();
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array.indent = value;
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Rc::get_mut(&mut self.settings).unwrap().array = Some(array);
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}
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self
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}
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/// Specify whether to use a trailing comma when serializing pretty arrays
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///
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/// See `Serializer::pretty_array` for more details.
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pub fn pretty_array_trailing_comma(&mut self, value: bool) -> &mut Self {
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let use_default = if let Some(ref mut a) = Rc::get_mut(&mut self.settings).unwrap().array {
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a.trailing_comma = value;
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false
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} else {
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true
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};
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if use_default {
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let mut array = ArraySettings::pretty();
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array.trailing_comma = value;
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Rc::get_mut(&mut self.settings).unwrap().array = Some(array);
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}
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self
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}
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fn display<T: fmt::Display>(&mut self, t: T, type_: &'static str) -> Result<(), Error> {
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self.emit_key(type_)?;
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write!(self.dst, "{}", t).map_err(ser::Error::custom)?;
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if let State::Table { .. } = self.state {
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self.dst.push_str("\n");
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}
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Ok(())
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}
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fn emit_key(&mut self, type_: &'static str) -> Result<(), Error> {
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self.array_type(type_)?;
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let state = self.state.clone();
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self._emit_key(&state)
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}
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// recursive implementation of `emit_key` above
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fn _emit_key(&mut self, state: &State<'_>) -> Result<(), Error> {
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match *state {
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State::End => Ok(()),
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State::Array {
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parent,
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first,
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type_,
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len,
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} => {
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assert!(type_.get().is_some());
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if first.get() {
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self._emit_key(parent)?;
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}
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self.emit_array(first, len)
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}
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State::Table {
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parent,
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first,
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table_emitted,
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key,
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} => {
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if table_emitted.get() {
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return Err(Error::ValueAfterTable);
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}
|
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if first.get() {
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self.emit_table_header(parent)?;
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first.set(false);
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}
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self.escape_key(key)?;
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self.dst.push_str(" = ");
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Ok(())
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}
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}
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}
|
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|
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fn emit_array(&mut self, first: &Cell<bool>, len: Option<usize>) -> Result<(), Error> {
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match (len, &self.settings.array) {
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(Some(0..=1), _) | (_, &None) => {
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if first.get() {
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self.dst.push_str("[")
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} else {
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self.dst.push_str(", ")
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}
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}
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(_, &Some(ref a)) => {
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if first.get() {
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self.dst.push_str("[\n")
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} else {
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self.dst.push_str(",\n")
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}
|
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for _ in 0..a.indent {
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self.dst.push_str(" ");
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}
|
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}
|
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}
|
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Ok(())
|
|
}
|
|
|
|
fn array_type(&mut self, type_: &'static str) -> Result<(), Error> {
|
|
let prev = match self.state {
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|
State::Array { type_, .. } => type_,
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_ => return Ok(()),
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|
};
|
|
if let Some(prev) = prev.get() {
|
|
if prev != type_ {
|
|
return Err(Error::ArrayMixedType);
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|
}
|
|
} else {
|
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prev.set(Some(type_));
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}
|
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Ok(())
|
|
}
|
|
|
|
fn escape_key(&mut self, key: &str) -> Result<(), Error> {
|
|
let ok = key.chars().all(|c| match c {
|
|
'a'..='z' | 'A'..='Z' | '0'..='9' | '-' | '_' => true,
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|
_ => false,
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|
});
|
|
if ok {
|
|
write!(self.dst, "{}", key).map_err(ser::Error::custom)?;
|
|
} else {
|
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self.emit_str(key, true)?;
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}
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Ok(())
|
|
}
|
|
|
|
fn emit_str(&mut self, value: &str, is_key: bool) -> Result<(), Error> {
|
|
#[derive(PartialEq)]
|
|
enum Type {
|
|
NewlineTripple,
|
|
OnelineTripple,
|
|
OnelineSingle,
|
|
}
|
|
|
|
enum Repr {
|
|
/// represent as a literal string (using '')
|
|
Literal(String, Type),
|
|
/// represent the std way (using "")
|
|
Std(Type),
|
|
}
|
|
|
|
fn do_pretty(value: &str) -> Repr {
|
|
// For doing pretty prints we store in a new String
|
|
// because there are too many cases where pretty cannot
|
|
// work. We need to determine:
|
|
// - if we are a "multi-line" pretty (if there are \n)
|
|
// - if ['''] appears if multi or ['] if single
|
|
// - if there are any invalid control characters
|
|
//
|
|
// Doing it any other way would require multiple passes
|
|
// to determine if a pretty string works or not.
|
|
let mut out = String::with_capacity(value.len() * 2);
|
|
let mut ty = Type::OnelineSingle;
|
|
// found consecutive single quotes
|
|
let mut max_found_singles = 0;
|
|
let mut found_singles = 0;
|
|
let mut can_be_pretty = true;
|
|
|
|
for ch in value.chars() {
|
|
if can_be_pretty {
|
|
if ch == '\'' {
|
|
found_singles += 1;
|
|
if found_singles >= 3 {
|
|
can_be_pretty = false;
|
|
}
|
|
} else {
|
|
if found_singles > max_found_singles {
|
|
max_found_singles = found_singles;
|
|
}
|
|
found_singles = 0
|
|
}
|
|
match ch {
|
|
'\t' => {}
|
|
'\n' => ty = Type::NewlineTripple,
|
|
// note that the following are invalid: \b \f \r
|
|
c if c < '\u{1f}' => can_be_pretty = false, // Invalid control character
|
|
_ => {}
|
|
}
|
|
out.push(ch);
|
|
} else {
|
|
// the string cannot be represented as pretty,
|
|
// still check if it should be multiline
|
|
if ch == '\n' {
|
|
ty = Type::NewlineTripple;
|
|
}
|
|
}
|
|
}
|
|
if can_be_pretty && found_singles > 0 && value.ends_with('\'') {
|
|
// We cannot escape the ending quote so we must use """
|
|
can_be_pretty = false;
|
|
}
|
|
if !can_be_pretty {
|
|
debug_assert!(ty != Type::OnelineTripple);
|
|
return Repr::Std(ty);
|
|
}
|
|
if found_singles > max_found_singles {
|
|
max_found_singles = found_singles;
|
|
}
|
|
debug_assert!(max_found_singles < 3);
|
|
if ty == Type::OnelineSingle && max_found_singles >= 1 {
|
|
// no newlines, but must use ''' because it has ' in it
|
|
ty = Type::OnelineTripple;
|
|
}
|
|
Repr::Literal(out, ty)
|
|
}
|
|
|
|
let repr = if !is_key && self.settings.string.is_some() {
|
|
match (&self.settings.string, do_pretty(value)) {
|
|
(&Some(StringSettings { literal: false, .. }), Repr::Literal(_, ty)) => {
|
|
Repr::Std(ty)
|
|
}
|
|
(_, r) => r,
|
|
}
|
|
} else {
|
|
Repr::Std(Type::OnelineSingle)
|
|
};
|
|
match repr {
|
|
Repr::Literal(literal, ty) => {
|
|
// A pretty string
|
|
match ty {
|
|
Type::NewlineTripple => self.dst.push_str("'''\n"),
|
|
Type::OnelineTripple => self.dst.push_str("'''"),
|
|
Type::OnelineSingle => self.dst.push('\''),
|
|
}
|
|
self.dst.push_str(&literal);
|
|
match ty {
|
|
Type::OnelineSingle => self.dst.push('\''),
|
|
_ => self.dst.push_str("'''"),
|
|
}
|
|
}
|
|
Repr::Std(ty) => {
|
|
match ty {
|
|
Type::NewlineTripple => self.dst.push_str("\"\"\"\n"),
|
|
// note: OnelineTripple can happen if do_pretty wants to do
|
|
// '''it's one line'''
|
|
// but settings.string.literal == false
|
|
Type::OnelineSingle | Type::OnelineTripple => self.dst.push('"'),
|
|
}
|
|
for ch in value.chars() {
|
|
match ch {
|
|
'\u{8}' => self.dst.push_str("\\b"),
|
|
'\u{9}' => self.dst.push_str("\\t"),
|
|
'\u{a}' => match ty {
|
|
Type::NewlineTripple => self.dst.push('\n'),
|
|
Type::OnelineSingle => self.dst.push_str("\\n"),
|
|
_ => unreachable!(),
|
|
},
|
|
'\u{c}' => self.dst.push_str("\\f"),
|
|
'\u{d}' => self.dst.push_str("\\r"),
|
|
'\u{22}' => self.dst.push_str("\\\""),
|
|
'\u{5c}' => self.dst.push_str("\\\\"),
|
|
c if c < '\u{1f}' => {
|
|
write!(self.dst, "\\u{:04X}", ch as u32).map_err(ser::Error::custom)?;
|
|
}
|
|
ch => self.dst.push(ch),
|
|
}
|
|
}
|
|
match ty {
|
|
Type::NewlineTripple => self.dst.push_str("\"\"\""),
|
|
Type::OnelineSingle | Type::OnelineTripple => self.dst.push('"'),
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn emit_table_header(&mut self, state: &State<'_>) -> Result<(), Error> {
|
|
let array_of_tables = match *state {
|
|
State::End => return Ok(()),
|
|
State::Array { .. } => true,
|
|
_ => false,
|
|
};
|
|
|
|
// Unlike [..]s, we can't omit [[..]] ancestors, so be sure to emit table
|
|
// headers for them.
|
|
let mut p = state;
|
|
if let State::Array { first, parent, .. } = *state {
|
|
if first.get() {
|
|
p = parent;
|
|
}
|
|
}
|
|
while let State::Table { first, parent, .. } = *p {
|
|
p = parent;
|
|
if !first.get() {
|
|
break;
|
|
}
|
|
if let State::Array {
|
|
parent: &State::Table { .. },
|
|
..
|
|
} = *parent
|
|
{
|
|
self.emit_table_header(parent)?;
|
|
break;
|
|
}
|
|
}
|
|
|
|
match *state {
|
|
State::Table { first, .. } => {
|
|
if !first.get() {
|
|
// Newline if we are a table that is not the first
|
|
// table in the document.
|
|
self.dst.push('\n');
|
|
}
|
|
}
|
|
State::Array { parent, first, .. } => {
|
|
if !first.get() {
|
|
// Always newline if we are not the first item in the
|
|
// table-array
|
|
self.dst.push('\n');
|
|
} else if let State::Table { first, .. } = *parent {
|
|
if !first.get() {
|
|
// Newline if we are not the first item in the document
|
|
self.dst.push('\n');
|
|
}
|
|
}
|
|
}
|
|
_ => {}
|
|
}
|
|
self.dst.push_str("[");
|
|
if array_of_tables {
|
|
self.dst.push_str("[");
|
|
}
|
|
self.emit_key_part(state)?;
|
|
if array_of_tables {
|
|
self.dst.push_str("]");
|
|
}
|
|
self.dst.push_str("]\n");
|
|
Ok(())
|
|
}
|
|
|
|
fn emit_key_part(&mut self, key: &State<'_>) -> Result<bool, Error> {
|
|
match *key {
|
|
State::Array { parent, .. } => self.emit_key_part(parent),
|
|
State::End => Ok(true),
|
|
State::Table {
|
|
key,
|
|
parent,
|
|
table_emitted,
|
|
..
|
|
} => {
|
|
table_emitted.set(true);
|
|
let first = self.emit_key_part(parent)?;
|
|
if !first {
|
|
self.dst.push_str(".");
|
|
}
|
|
self.escape_key(key)?;
|
|
Ok(false)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
macro_rules! serialize_float {
|
|
($this:expr, $v:expr) => {{
|
|
$this.emit_key("float")?;
|
|
if ($v.is_nan() || $v == 0.0) && $v.is_sign_negative() {
|
|
write!($this.dst, "-").map_err(ser::Error::custom)?;
|
|
}
|
|
if $v.is_nan() {
|
|
write!($this.dst, "nan").map_err(ser::Error::custom)?;
|
|
} else {
|
|
write!($this.dst, "{}", $v).map_err(ser::Error::custom)?;
|
|
}
|
|
if $v % 1.0 == 0.0 {
|
|
write!($this.dst, ".0").map_err(ser::Error::custom)?;
|
|
}
|
|
if let State::Table { .. } = $this.state {
|
|
$this.dst.push_str("\n");
|
|
}
|
|
return Ok(());
|
|
}};
|
|
}
|
|
|
|
impl<'a, 'b> ser::Serializer for &'b mut Serializer<'a> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
type SerializeSeq = SerializeSeq<'a, 'b>;
|
|
type SerializeTuple = SerializeSeq<'a, 'b>;
|
|
type SerializeTupleStruct = SerializeSeq<'a, 'b>;
|
|
type SerializeTupleVariant = SerializeSeq<'a, 'b>;
|
|
type SerializeMap = SerializeTable<'a, 'b>;
|
|
type SerializeStruct = SerializeTable<'a, 'b>;
|
|
type SerializeStructVariant = ser::Impossible<(), Error>;
|
|
|
|
fn serialize_bool(self, v: bool) -> Result<(), Self::Error> {
|
|
self.display(v, "bool")
|
|
}
|
|
|
|
fn serialize_i8(self, v: i8) -> Result<(), Self::Error> {
|
|
self.display(v, "integer")
|
|
}
|
|
|
|
fn serialize_i16(self, v: i16) -> Result<(), Self::Error> {
|
|
self.display(v, "integer")
|
|
}
|
|
|
|
fn serialize_i32(self, v: i32) -> Result<(), Self::Error> {
|
|
self.display(v, "integer")
|
|
}
|
|
|
|
fn serialize_i64(self, v: i64) -> Result<(), Self::Error> {
|
|
self.display(v, "integer")
|
|
}
|
|
|
|
fn serialize_u8(self, v: u8) -> Result<(), Self::Error> {
|
|
self.display(v, "integer")
|
|
}
|
|
|
|
fn serialize_u16(self, v: u16) -> Result<(), Self::Error> {
|
|
self.display(v, "integer")
|
|
}
|
|
|
|
fn serialize_u32(self, v: u32) -> Result<(), Self::Error> {
|
|
self.display(v, "integer")
|
|
}
|
|
|
|
fn serialize_u64(self, v: u64) -> Result<(), Self::Error> {
|
|
self.display(v, "integer")
|
|
}
|
|
|
|
fn serialize_f32(self, v: f32) -> Result<(), Self::Error> {
|
|
serialize_float!(self, v)
|
|
}
|
|
|
|
fn serialize_f64(self, v: f64) -> Result<(), Self::Error> {
|
|
serialize_float!(self, v)
|
|
}
|
|
|
|
fn serialize_char(self, v: char) -> Result<(), Self::Error> {
|
|
let mut buf = [0; 4];
|
|
self.serialize_str(v.encode_utf8(&mut buf))
|
|
}
|
|
|
|
fn serialize_str(self, value: &str) -> Result<(), Self::Error> {
|
|
self.emit_key("string")?;
|
|
self.emit_str(value, false)?;
|
|
if let State::Table { .. } = self.state {
|
|
self.dst.push_str("\n");
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn serialize_bytes(self, value: &[u8]) -> Result<(), Self::Error> {
|
|
use serde::ser::Serialize;
|
|
value.serialize(self)
|
|
}
|
|
|
|
fn serialize_none(self) -> Result<(), Self::Error> {
|
|
Err(Error::UnsupportedNone)
|
|
}
|
|
|
|
fn serialize_some<T: ?Sized>(self, value: &T) -> Result<(), Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
value.serialize(self)
|
|
}
|
|
|
|
fn serialize_unit(self) -> Result<(), Self::Error> {
|
|
Err(Error::UnsupportedType)
|
|
}
|
|
|
|
fn serialize_unit_struct(self, _name: &'static str) -> Result<(), Self::Error> {
|
|
Err(Error::UnsupportedType)
|
|
}
|
|
|
|
fn serialize_unit_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
variant: &'static str,
|
|
) -> Result<(), Self::Error> {
|
|
self.serialize_str(variant)
|
|
}
|
|
|
|
fn serialize_newtype_struct<T: ?Sized>(
|
|
self,
|
|
_name: &'static str,
|
|
value: &T,
|
|
) -> Result<(), Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
value.serialize(self)
|
|
}
|
|
|
|
fn serialize_newtype_variant<T: ?Sized>(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_value: &T,
|
|
) -> Result<(), Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
Err(Error::UnsupportedType)
|
|
}
|
|
|
|
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
|
|
self.array_type("array")?;
|
|
Ok(SerializeSeq {
|
|
ser: self,
|
|
first: Cell::new(true),
|
|
type_: Cell::new(None),
|
|
len,
|
|
})
|
|
}
|
|
|
|
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
|
|
self.serialize_seq(Some(len))
|
|
}
|
|
|
|
fn serialize_tuple_struct(
|
|
self,
|
|
_name: &'static str,
|
|
len: usize,
|
|
) -> Result<Self::SerializeTupleStruct, Self::Error> {
|
|
self.serialize_seq(Some(len))
|
|
}
|
|
|
|
fn serialize_tuple_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
len: usize,
|
|
) -> Result<Self::SerializeTupleVariant, Self::Error> {
|
|
self.serialize_seq(Some(len))
|
|
}
|
|
|
|
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
|
|
self.array_type("table")?;
|
|
Ok(SerializeTable::Table {
|
|
ser: self,
|
|
key: String::new(),
|
|
first: Cell::new(true),
|
|
table_emitted: Cell::new(false),
|
|
})
|
|
}
|
|
|
|
fn serialize_struct(
|
|
self,
|
|
name: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeStruct, Self::Error> {
|
|
if name == datetime::NAME {
|
|
self.array_type("datetime")?;
|
|
Ok(SerializeTable::Datetime(self))
|
|
} else {
|
|
self.array_type("table")?;
|
|
Ok(SerializeTable::Table {
|
|
ser: self,
|
|
key: String::new(),
|
|
first: Cell::new(true),
|
|
table_emitted: Cell::new(false),
|
|
})
|
|
}
|
|
}
|
|
|
|
fn serialize_struct_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeStructVariant, Self::Error> {
|
|
Err(Error::UnsupportedType)
|
|
}
|
|
}
|
|
|
|
impl<'a, 'b> ser::SerializeSeq for SerializeSeq<'a, 'b> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
value.serialize(&mut Serializer {
|
|
dst: &mut *self.ser.dst,
|
|
state: State::Array {
|
|
parent: &self.ser.state,
|
|
first: &self.first,
|
|
type_: &self.type_,
|
|
len: self.len,
|
|
},
|
|
settings: self.ser.settings.clone(),
|
|
})?;
|
|
self.first.set(false);
|
|
Ok(())
|
|
}
|
|
|
|
fn end(self) -> Result<(), Error> {
|
|
match self.type_.get() {
|
|
Some("table") => return Ok(()),
|
|
Some(_) => match (self.len, &self.ser.settings.array) {
|
|
(Some(0..=1), _) | (_, &None) => {
|
|
self.ser.dst.push_str("]");
|
|
}
|
|
(_, &Some(ref a)) => {
|
|
if a.trailing_comma {
|
|
self.ser.dst.push_str(",");
|
|
}
|
|
self.ser.dst.push_str("\n]");
|
|
}
|
|
},
|
|
None => {
|
|
assert!(self.first.get());
|
|
self.ser.emit_key("array")?;
|
|
self.ser.dst.push_str("[]")
|
|
}
|
|
}
|
|
if let State::Table { .. } = self.ser.state {
|
|
self.ser.dst.push_str("\n");
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, 'b> ser::SerializeTuple for SerializeSeq<'a, 'b> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
ser::SerializeSeq::serialize_element(self, value)
|
|
}
|
|
|
|
fn end(self) -> Result<(), Error> {
|
|
ser::SerializeSeq::end(self)
|
|
}
|
|
}
|
|
|
|
impl<'a, 'b> ser::SerializeTupleVariant for SerializeSeq<'a, 'b> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
ser::SerializeSeq::serialize_element(self, value)
|
|
}
|
|
|
|
fn end(self) -> Result<(), Error> {
|
|
ser::SerializeSeq::end(self)
|
|
}
|
|
}
|
|
|
|
impl<'a, 'b> ser::SerializeTupleStruct for SerializeSeq<'a, 'b> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
ser::SerializeSeq::serialize_element(self, value)
|
|
}
|
|
|
|
fn end(self) -> Result<(), Error> {
|
|
ser::SerializeSeq::end(self)
|
|
}
|
|
}
|
|
|
|
impl<'a, 'b> ser::SerializeMap for SerializeTable<'a, 'b> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
fn serialize_key<T: ?Sized>(&mut self, input: &T) -> Result<(), Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
match *self {
|
|
SerializeTable::Datetime(_) => panic!(), // shouldn't be possible
|
|
SerializeTable::Table { ref mut key, .. } => {
|
|
key.truncate(0);
|
|
*key = input.serialize(StringExtractor)?;
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
match *self {
|
|
SerializeTable::Datetime(_) => panic!(), // shouldn't be possible
|
|
SerializeTable::Table {
|
|
ref mut ser,
|
|
ref key,
|
|
ref first,
|
|
ref table_emitted,
|
|
..
|
|
} => {
|
|
let res = value.serialize(&mut Serializer {
|
|
dst: &mut *ser.dst,
|
|
state: State::Table {
|
|
key,
|
|
parent: &ser.state,
|
|
first,
|
|
table_emitted,
|
|
},
|
|
settings: ser.settings.clone(),
|
|
});
|
|
match res {
|
|
Ok(()) => first.set(false),
|
|
Err(Error::UnsupportedNone) => {}
|
|
Err(e) => return Err(e),
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn end(self) -> Result<(), Error> {
|
|
match self {
|
|
SerializeTable::Datetime(_) => panic!(), // shouldn't be possible
|
|
SerializeTable::Table { ser, first, .. } => {
|
|
if first.get() {
|
|
let state = ser.state.clone();
|
|
ser.emit_table_header(&state)?;
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, 'b> ser::SerializeStruct for SerializeTable<'a, 'b> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<(), Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
match *self {
|
|
SerializeTable::Datetime(ref mut ser) => {
|
|
if key == datetime::FIELD {
|
|
value.serialize(DateStrEmitter(&mut *ser))?;
|
|
} else {
|
|
return Err(Error::DateInvalid);
|
|
}
|
|
}
|
|
SerializeTable::Table {
|
|
ref mut ser,
|
|
ref first,
|
|
ref table_emitted,
|
|
..
|
|
} => {
|
|
let res = value.serialize(&mut Serializer {
|
|
dst: &mut *ser.dst,
|
|
state: State::Table {
|
|
key,
|
|
parent: &ser.state,
|
|
first,
|
|
table_emitted,
|
|
},
|
|
settings: ser.settings.clone(),
|
|
});
|
|
match res {
|
|
Ok(()) => first.set(false),
|
|
Err(Error::UnsupportedNone) => {}
|
|
Err(e) => return Err(e),
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn end(self) -> Result<(), Error> {
|
|
match self {
|
|
SerializeTable::Datetime(_) => {}
|
|
SerializeTable::Table { ser, first, .. } => {
|
|
if first.get() {
|
|
let state = ser.state.clone();
|
|
ser.emit_table_header(&state)?;
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
struct DateStrEmitter<'a, 'b>(&'b mut Serializer<'a>);
|
|
|
|
impl<'a, 'b> ser::Serializer for DateStrEmitter<'a, 'b> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
type SerializeSeq = ser::Impossible<(), Error>;
|
|
type SerializeTuple = ser::Impossible<(), Error>;
|
|
type SerializeTupleStruct = ser::Impossible<(), Error>;
|
|
type SerializeTupleVariant = ser::Impossible<(), Error>;
|
|
type SerializeMap = ser::Impossible<(), Error>;
|
|
type SerializeStruct = ser::Impossible<(), Error>;
|
|
type SerializeStructVariant = ser::Impossible<(), Error>;
|
|
|
|
fn serialize_bool(self, _v: bool) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_i8(self, _v: i8) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_i16(self, _v: i16) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_i32(self, _v: i32) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_i64(self, _v: i64) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_u8(self, _v: u8) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_u16(self, _v: u16) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_u32(self, _v: u32) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_u64(self, _v: u64) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_f32(self, _v: f32) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_f64(self, _v: f64) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_char(self, _v: char) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_str(self, value: &str) -> Result<(), Self::Error> {
|
|
self.0.display(value, "datetime")?;
|
|
Ok(())
|
|
}
|
|
|
|
fn serialize_bytes(self, _value: &[u8]) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_none(self) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<(), Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_unit(self) -> Result<(), Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_unit_struct(self, _name: &'static str) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_unit_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
) -> Result<(), Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_newtype_struct<T: ?Sized>(
|
|
self,
|
|
_name: &'static str,
|
|
_value: &T,
|
|
) -> Result<(), Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_newtype_variant<T: ?Sized>(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_value: &T,
|
|
) -> Result<(), Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_tuple_struct(
|
|
self,
|
|
_name: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeTupleStruct, Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_tuple_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeTupleVariant, Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_struct(
|
|
self,
|
|
_name: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeStruct, Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
|
|
fn serialize_struct_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeStructVariant, Self::Error> {
|
|
Err(Error::DateInvalid)
|
|
}
|
|
}
|
|
|
|
struct StringExtractor;
|
|
|
|
impl ser::Serializer for StringExtractor {
|
|
type Ok = String;
|
|
type Error = Error;
|
|
type SerializeSeq = ser::Impossible<String, Error>;
|
|
type SerializeTuple = ser::Impossible<String, Error>;
|
|
type SerializeTupleStruct = ser::Impossible<String, Error>;
|
|
type SerializeTupleVariant = ser::Impossible<String, Error>;
|
|
type SerializeMap = ser::Impossible<String, Error>;
|
|
type SerializeStruct = ser::Impossible<String, Error>;
|
|
type SerializeStructVariant = ser::Impossible<String, Error>;
|
|
|
|
fn serialize_bool(self, _v: bool) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_i8(self, _v: i8) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_i16(self, _v: i16) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_i32(self, _v: i32) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_i64(self, _v: i64) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_u8(self, _v: u8) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_u16(self, _v: u16) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_u32(self, _v: u32) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_u64(self, _v: u64) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_f32(self, _v: f32) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_f64(self, _v: f64) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_char(self, _v: char) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_str(self, value: &str) -> Result<String, Self::Error> {
|
|
Ok(value.to_string())
|
|
}
|
|
|
|
fn serialize_bytes(self, _value: &[u8]) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_none(self) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<String, Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_unit(self) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_unit_struct(self, _name: &'static str) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_unit_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
) -> Result<String, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_newtype_struct<T: ?Sized>(
|
|
self,
|
|
_name: &'static str,
|
|
value: &T,
|
|
) -> Result<String, Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
value.serialize(self)
|
|
}
|
|
|
|
fn serialize_newtype_variant<T: ?Sized>(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_value: &T,
|
|
) -> Result<String, Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_tuple_struct(
|
|
self,
|
|
_name: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeTupleStruct, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_tuple_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeTupleVariant, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_struct(
|
|
self,
|
|
_name: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeStruct, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
|
|
fn serialize_struct_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeStructVariant, Self::Error> {
|
|
Err(Error::KeyNotString)
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for Error {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
match *self {
|
|
Error::UnsupportedType => "unsupported Rust type".fmt(f),
|
|
Error::KeyNotString => "map key was not a string".fmt(f),
|
|
Error::ArrayMixedType => "arrays cannot have mixed types".fmt(f),
|
|
Error::ValueAfterTable => "values must be emitted before tables".fmt(f),
|
|
Error::DateInvalid => "a serialized date was invalid".fmt(f),
|
|
Error::NumberInvalid => "a serialized number was invalid".fmt(f),
|
|
Error::UnsupportedNone => "unsupported None value".fmt(f),
|
|
Error::Custom(ref s) => s.fmt(f),
|
|
Error::KeyNewline => unreachable!(),
|
|
Error::__Nonexhaustive => panic!(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl error::Error for Error {
|
|
fn description(&self) -> &str {
|
|
match *self {
|
|
Error::UnsupportedType => "unsupported Rust type",
|
|
Error::KeyNotString => "map key was not a string",
|
|
Error::ArrayMixedType => "arrays cannot have mixed types",
|
|
Error::ValueAfterTable => "values must be emitted before tables",
|
|
Error::DateInvalid => "a serialized date was invalid",
|
|
Error::NumberInvalid => "a serialized number was invalid",
|
|
Error::UnsupportedNone => "unsupported None value",
|
|
Error::Custom(_) => "custom error",
|
|
Error::KeyNewline => unreachable!(),
|
|
Error::__Nonexhaustive => panic!(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ser::Error for Error {
|
|
fn custom<T: fmt::Display>(msg: T) -> Error {
|
|
Error::Custom(msg.to_string())
|
|
}
|
|
}
|
|
|
|
enum Category {
|
|
Primitive,
|
|
Array,
|
|
Table,
|
|
}
|
|
|
|
/// Convenience function to serialize items in a map in an order valid with
|
|
/// TOML.
|
|
///
|
|
/// TOML carries the restriction that keys in a table must be serialized last if
|
|
/// their value is a table itself. This isn't always easy to guarantee, so this
|
|
/// helper can be used like so:
|
|
///
|
|
/// ```rust
|
|
/// # use serde_derive::Serialize;
|
|
/// # use std::collections::HashMap;
|
|
/// #[derive(Serialize)]
|
|
/// struct Manifest {
|
|
/// package: Package,
|
|
/// #[serde(serialize_with = "toml::ser::tables_last")]
|
|
/// dependencies: HashMap<String, Dependency>,
|
|
/// }
|
|
/// # type Package = String;
|
|
/// # type Dependency = String;
|
|
/// # fn main() {}
|
|
/// ```
|
|
pub fn tables_last<'a, I, K, V, S>(data: &'a I, serializer: S) -> Result<S::Ok, S::Error>
|
|
where
|
|
&'a I: IntoIterator<Item = (K, V)>,
|
|
K: ser::Serialize,
|
|
V: ser::Serialize,
|
|
S: ser::Serializer,
|
|
{
|
|
use serde::ser::SerializeMap;
|
|
|
|
let mut map = serializer.serialize_map(None)?;
|
|
for (k, v) in data {
|
|
if let Category::Primitive = v.serialize(Categorize::new())? {
|
|
map.serialize_entry(&k, &v)?;
|
|
}
|
|
}
|
|
for (k, v) in data {
|
|
if let Category::Array = v.serialize(Categorize::new())? {
|
|
map.serialize_entry(&k, &v)?;
|
|
}
|
|
}
|
|
for (k, v) in data {
|
|
if let Category::Table = v.serialize(Categorize::new())? {
|
|
map.serialize_entry(&k, &v)?;
|
|
}
|
|
}
|
|
map.end()
|
|
}
|
|
|
|
struct Categorize<E>(marker::PhantomData<E>);
|
|
|
|
impl<E> Categorize<E> {
|
|
fn new() -> Self {
|
|
Categorize(marker::PhantomData)
|
|
}
|
|
}
|
|
|
|
impl<E: ser::Error> ser::Serializer for Categorize<E> {
|
|
type Ok = Category;
|
|
type Error = E;
|
|
type SerializeSeq = Self;
|
|
type SerializeTuple = Self;
|
|
type SerializeTupleStruct = Self;
|
|
type SerializeTupleVariant = Self;
|
|
type SerializeMap = Self;
|
|
type SerializeStruct = Self;
|
|
type SerializeStructVariant = ser::Impossible<Category, E>;
|
|
|
|
fn serialize_bool(self, _: bool) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_i8(self, _: i8) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_i16(self, _: i16) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_i32(self, _: i32) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_i64(self, _: i64) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_u8(self, _: u8) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_u16(self, _: u16) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_u32(self, _: u32) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_u64(self, _: u64) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_f32(self, _: f32) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_f64(self, _: f64) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_char(self, _: char) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_str(self, _: &str) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Primitive)
|
|
}
|
|
|
|
fn serialize_bytes(self, _: &[u8]) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Array)
|
|
}
|
|
|
|
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
|
|
Err(ser::Error::custom("unsupported"))
|
|
}
|
|
|
|
fn serialize_some<T: ?Sized + ser::Serialize>(self, v: &T) -> Result<Self::Ok, Self::Error> {
|
|
v.serialize(self)
|
|
}
|
|
|
|
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
|
|
Err(ser::Error::custom("unsupported"))
|
|
}
|
|
|
|
fn serialize_unit_struct(self, _: &'static str) -> Result<Self::Ok, Self::Error> {
|
|
Err(ser::Error::custom("unsupported"))
|
|
}
|
|
|
|
fn serialize_unit_variant(
|
|
self,
|
|
_: &'static str,
|
|
_: u32,
|
|
_: &'static str,
|
|
) -> Result<Self::Ok, Self::Error> {
|
|
Err(ser::Error::custom("unsupported"))
|
|
}
|
|
|
|
fn serialize_newtype_struct<T: ?Sized + ser::Serialize>(
|
|
self,
|
|
_: &'static str,
|
|
v: &T,
|
|
) -> Result<Self::Ok, Self::Error> {
|
|
v.serialize(self)
|
|
}
|
|
|
|
fn serialize_newtype_variant<T: ?Sized + ser::Serialize>(
|
|
self,
|
|
_: &'static str,
|
|
_: u32,
|
|
_: &'static str,
|
|
_: &T,
|
|
) -> Result<Self::Ok, Self::Error> {
|
|
Err(ser::Error::custom("unsupported"))
|
|
}
|
|
|
|
fn serialize_seq(self, _: Option<usize>) -> Result<Self, Self::Error> {
|
|
Ok(self)
|
|
}
|
|
|
|
fn serialize_tuple(self, _: usize) -> Result<Self::SerializeTuple, Self::Error> {
|
|
Ok(self)
|
|
}
|
|
|
|
fn serialize_tuple_struct(
|
|
self,
|
|
_: &'static str,
|
|
_: usize,
|
|
) -> Result<Self::SerializeTupleStruct, Self::Error> {
|
|
Ok(self)
|
|
}
|
|
|
|
fn serialize_tuple_variant(
|
|
self,
|
|
_: &'static str,
|
|
_: u32,
|
|
_: &'static str,
|
|
_: usize,
|
|
) -> Result<Self::SerializeTupleVariant, Self::Error> {
|
|
Ok(self)
|
|
}
|
|
|
|
fn serialize_map(self, _: Option<usize>) -> Result<Self, Self::Error> {
|
|
Ok(self)
|
|
}
|
|
|
|
fn serialize_struct(self, _: &'static str, _: usize) -> Result<Self, Self::Error> {
|
|
Ok(self)
|
|
}
|
|
|
|
fn serialize_struct_variant(
|
|
self,
|
|
_: &'static str,
|
|
_: u32,
|
|
_: &'static str,
|
|
_: usize,
|
|
) -> Result<Self::SerializeStructVariant, Self::Error> {
|
|
Err(ser::Error::custom("unsupported"))
|
|
}
|
|
}
|
|
|
|
impl<E: ser::Error> ser::SerializeSeq for Categorize<E> {
|
|
type Ok = Category;
|
|
type Error = E;
|
|
|
|
fn serialize_element<T: ?Sized + ser::Serialize>(&mut self, _: &T) -> Result<(), Self::Error> {
|
|
Ok(())
|
|
}
|
|
|
|
fn end(self) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Array)
|
|
}
|
|
}
|
|
|
|
impl<E: ser::Error> ser::SerializeTuple for Categorize<E> {
|
|
type Ok = Category;
|
|
type Error = E;
|
|
|
|
fn serialize_element<T: ?Sized + ser::Serialize>(&mut self, _: &T) -> Result<(), Self::Error> {
|
|
Ok(())
|
|
}
|
|
|
|
fn end(self) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Array)
|
|
}
|
|
}
|
|
|
|
impl<E: ser::Error> ser::SerializeTupleVariant for Categorize<E> {
|
|
type Ok = Category;
|
|
type Error = E;
|
|
|
|
fn serialize_field<T: ?Sized + ser::Serialize>(&mut self, _: &T) -> Result<(), Self::Error> {
|
|
Ok(())
|
|
}
|
|
|
|
fn end(self) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Array)
|
|
}
|
|
}
|
|
|
|
impl<E: ser::Error> ser::SerializeTupleStruct for Categorize<E> {
|
|
type Ok = Category;
|
|
type Error = E;
|
|
|
|
fn serialize_field<T: ?Sized + ser::Serialize>(&mut self, _: &T) -> Result<(), Self::Error> {
|
|
Ok(())
|
|
}
|
|
|
|
fn end(self) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Array)
|
|
}
|
|
}
|
|
|
|
impl<E: ser::Error> ser::SerializeMap for Categorize<E> {
|
|
type Ok = Category;
|
|
type Error = E;
|
|
|
|
fn serialize_key<T: ?Sized + ser::Serialize>(&mut self, _: &T) -> Result<(), Self::Error> {
|
|
Ok(())
|
|
}
|
|
|
|
fn serialize_value<T: ?Sized + ser::Serialize>(&mut self, _: &T) -> Result<(), Self::Error> {
|
|
Ok(())
|
|
}
|
|
|
|
fn end(self) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Table)
|
|
}
|
|
}
|
|
|
|
impl<E: ser::Error> ser::SerializeStruct for Categorize<E> {
|
|
type Ok = Category;
|
|
type Error = E;
|
|
|
|
fn serialize_field<T: ?Sized>(&mut self, _: &'static str, _: &T) -> Result<(), Self::Error>
|
|
where
|
|
T: ser::Serialize,
|
|
{
|
|
Ok(())
|
|
}
|
|
|
|
fn end(self) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Category::Table)
|
|
}
|
|
}
|