#################
# Rust Snippets #
#################

# Functions
snippet fn "Function definition"
	fn ${1:function_name}(${2})${3} {
		${0}
	}
snippet pfn "Function definition"
	pub fn ${1:function_name}(${2})${3} {
		${0}
	}
snippet afn "Async function definition"
	async fn ${1:function_name}(${2})${3} {
		${0}
	}
snippet pafn "Async function definition"
	pub async fn ${1:function_name}(${2})${3} {
		${0}
	}
snippet bench "Bench function" b
	#[bench]
	fn ${1:bench_function_name}(b: &mut test::Bencher) {
		b.iter(|| {
			${0}
		})
	}
snippet new "Constructor function"
	pub fn new(${2}) -> ${1:Self} {
		$1 { ${3} }
	}
snippet main "Main function"
	pub fn main() {
		${0}
	}
snippet let "let variable declaration with type inference"
	let ${1} = ${2};
snippet lett "let variable declaration with explicit type annotation"
	let ${1}: ${2} = ${3};
snippet letm "let mut variable declaration with type inference"
	let mut ${1} = ${2};
snippet lettm "let mut variable declaration with explicit type annotation"
	let mut ${1}: ${2} = ${3};
snippet pri "print!"
	print!("${1}");
snippet pri, "print! with format param"
	print!("${1}{${2}}", ${3});
snippet pln "println!"
	println!("${1}");
snippet pln, "println! with format param"
	println!("${1}{${2}}", ${3});
snippet fmt "format!"
	format!("${1}{${2}}", ${3});
snippet d "dbg! debugging macro"
	dbg!(${0:${VISUAL}})
snippet d; "dbg! debugging macro statement"
	dbg!(&${1});
	${0}
# Modules
snippet ec "extern crate"
	extern crate ${1:sync};
snippet ecl "extern crate log"
	#[macro_use]
	extern crate log;
snippet mod
	mod ${1:`substitute(vim_snippets#Filename(), '\(_\|^\)\(.\)', '\u\2', 'g')`} {
		${0}
	} /* $1 */
# Testing
snippet as "assert!"
	assert!(${1:predicate});
snippet ase "assert_eq!"
	assert_eq!(${1:expected}, ${2:actual});
snippet test "Unit test function"
	#[test]
	fn ${1:function_name}_test() {
		${0}
	}
snippet testmod "Test module" b
	#[cfg(test)]
	mod tests {
		use super::${1:*};

		test${0}
	}
snippet ig "#[ignore]"
	#[ignore]
# Attributes
snippet allow "allow lint attribute" b
	#[allow(${1:unused_variables})]
snippet cfg "cfg attribute" b
	#[cfg(${1:target_os = "linux"})]
snippet feat "feature attribute" b
	#![feature(${1:plugin})]
snippet der "#[derive(..)]" b
	#[derive(${1:Debug})]
snippet attr "#[..]" b
	#[${1:inline}]
snippet crate "Define create meta attributes"
	// Crate name
	#![crate_name = "${1:crate_name}"]
	// Additional metadata attributes
	#![desc = "${2:Description.}"]
	#![license = "${3:BSD}"]
	#![comment = "${4:Comment.}"]
	// Specify the output type
	#![crate_type = "${5:lib}"]
# Common types
snippet opt "Option<T>"
	Option<${1:i32}>
snippet res "Result<T, E>"
	Result<${1:&str}, ${2:()}>
# Control structures
snippet if
	if ${1} {
		${0:${VISUAL}}
	}
snippet ife "if / else"
	if ${1} {
		${2:${VISUAL}}
	} else {
		${0}
	}
snippet ifl "if let (...)"
	if let ${1:Some($2)} = $3 {
		${0:${VISUAL}}
	}
snippet el "else"
	else {
		${0:${VISUAL}}
	}
snippet eli "else if"
	else if ${1} {
		${0:${VISUAL}}
	}
snippet mat "match pattern"
	match ${1} {
		${2} => ${3}
	}
snippet case "Case clause of pattern match"
	${1:_} => ${2:expression}
snippet = "=> "
	=> $0
snippet loop "loop {}" b
	loop {
		${0:${VISUAL}}
	}
snippet wh "while loop"
	while ${1:condition} {
		${0:${VISUAL}}
	}
snippet whl "while let (...)"
	while let ${1:Some($2)} = $3 {
		${0:${VISUAL}}
	}
snippet for "for ... in ... loop"
	for ${1:i} in ${2} {
		${0}
	}
# TODO commenting
snippet todo "TODO comment"
	// TODO: $0
snippet fixme "FIXME comment"
	// FIXME: $0
# Struct
snippet st "Struct definition"
	struct ${1:`substitute(vim_snippets#Filename(), '\(_\|^\)\(.\)', '\u\2', 'g')`} {
		${0}
	}
snippet impl "Struct/Trait implementation"
	impl ${1:Type/Trait}${2: for $3} {
		${0}
	}
snippet stn "Struct with new constructor"
	pub struct ${1:`substitute(vim_snippets#Filename(), '\(_\|^\)\(.\)', '\u\2', 'g')`} {
		${0}
	}

	impl$2 $1$2 {
		pub fn new(${4}) -> Self {
			$1 { ${5} }
		}
	}
snippet ty "Type alias"
	type ${1:NewName} = $2;
snippet enum "enum definition"
	enum ${1:Name} {
		${2},
	}
snippet penum "pub enum definition"
	pub enum ${1:Name} {
		${2},
	}
# Traits
snippet trait "Trait definition"
	trait ${1:Name} {
		${0}
	}
snippet drop "Drop trait implementation (destructor)"
	impl Drop for $1 {
		fn drop(&mut self) {
			${0}
		}
	}
# Statics
snippet ss "static string declaration"
	static ${1}: &'static str = "${0}";
snippet stat "static item declaration"
	static ${1}: ${2:usize} = ${0};
# Concurrency
snippet spawn "spawn a thread"
	thread::spawn(${1:move }|| {
		${0}
	});
snippet chan "Declare (Sender, Receiver) pair of asynchronous channel()"
	let (${1:tx}, ${2:rx}): (Sender<${3:i32}>, Receiver<${4:i32}>) = channel();
# Implementations
snippet asref "AsRef trait implementation"
	impl AsRef<${1:Ref}> for ${2:Type} {
		fn as_ref(&self) -> &${3:$1} {
			&self.${0:field}
		}
	}
snippet asmut "AsMut trait implementation"
	impl AsMut<${1:Ref}> for ${2:Type} {
		fn as_mut(&mut self) -> &mut ${3:$1} {
			&mut self.${0:field}
		}
	}
snippet fd "Struct field definition" w
	${1:name}: ${2:Type},
snippet || "Closure, anonymous function (inline)" i
	${1:move }|$2| { $3 }
snippet |} "Closure, anonymous function (block)" i
	${1:move }|$2| {
		$3
	}
snippet macro "macro_rules!" b
	macro_rules! ${1:name} {
		(${2:matcher}) => (
			$3
		)
	}
snippet boxp "Box::new()"
	Box::new(${0:${VISUAL}})
snippet rc "Rc::new()"
	Rc::new(${0:${VISUAL}})
snippet unim "unimplemented!()"
	unimplemented!()
snippet use "use ...;" b
	use ${1:std::$2};