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

# Functions
snippet fn "Function definition"
	fn ${1:function_name}(${2})${3} {
		${0}
	}
snippet test "Unit test function"
	#[test]
	fn ${1:test_function_name}() {
		${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:Name} {
		$1 { ${3} };
	}
snippet main "Main function"
	pub fn main() {
		${0}
	}
snippet let "let variable declaration"
	let ${1:name}${2:: ${3:type}} = ${4};
snippet letm "let mut variable declaration"
	let mut ${1:name}${2:: ${3:type}} = ${4};
snippet pln "println!"
	println!("${1}");
snippet pln, "println! with format param"
	println!("${1}", ${2});

# 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}
	} /* $1 */
snippet testmod "Test module" b
	#[cfg(test)]
	mod tests {
		use super::${1:*};

		test${0}
	}

# Attributes
snippet allow "allow lint attribute" b
	#[allow(${1:unused_variable})]
snippet cfg "cfg attribute" b
	#[cfg(${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 = "${2:Descrption.}"]
	#![license = "${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}
	}
snippet ife "if / else"
	if ${1} {
		${2}
	} else {
		${0}
	}
snippet el "else"
	else {
		${0}
	}
snippet eli "else if"
	else if ${1} {
		${0}
	}
snippet mat "match pattern"
	match ${1} {
		${2} => ${3},
	}
snippet loop "loop {}" b
	loop {
		${0}
	}
snippet while "while loop"
	while ${1:condition} {
		${0}
	}
snippet for "for ... in ... loop"
	for ${1:i} in ${2:0u..10} {
		${0}
	}
# TODO commenting
snippet todo "TODO comment"
	// [TODO]: ${0:Description}
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: ${3:for Type}} {
		${0}
	}
snippet stn "Struct with new constructor"
	pub struct ${1:`substitute(vim_snippets#Filename(), '\(_\|^\)\(.\)', '\u\2', 'g')`} {
		${0}
	}

	impl $1 {
		pub fn new(${2}) -> $1 {
			$1 { ${3} };
		}
	}
snippet type "Type alias"
	type ${1:NewName} = $2;
snippet enum "enum definition"
	enum ${1:Name} {
		${2},
	}
# Traits
snippet trait "Trait definition"
	trait ${1:Name} {
		${0}
	}
snippet drop "Drop trait implementation (destructor)"
	impl Drop for ${1:Name} {
		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 task or thread"
	spawn(proc() {
		${0}
	});
snippet chan "Declare (Sender, Receiver) pair of asynchronous channel()"
	let (${1:tx}, ${2:rx}): (Sender<${3:i32}>, Receiver<${4:i32}>) = channel();

# Testing
snippet as "assert!"
	assert!(${1:predicate})
snippet ase "assert_eq!"
	assert_eq!(${1:expected}, ${2:actual})