Added more token methods

src/parser.rs

@@ -40,7 +40,6 @@ pub enum Token {
 	Number(LineLocation, f64),
 	Constant(LineLocation, f64, String),
 
-	Root(VecDeque<Token>),
 	Multiply(VecDeque<Token>),
 	Divide(VecDeque<Token>),
 	Add(VecDeque<Token>),
@@ -52,6 +51,42 @@ pub enum Token {
 
 impl Token {
 
+	#[inline(always)]
+	pub fn get_args(&mut self) -> Option<&mut VecDeque<Token>> {
+		match self {
+			Token::Multiply(ref mut v)
+			| Token::Divide(ref mut v)
+			| Token::Add(ref mut v)
+			| Token::Factorial(ref mut v)
+			| Token::Negative(ref mut v)
+			| Token::Power(ref mut v)
+			| Token::Modulo(ref mut v)
+			=> Some(v),
+			_ => None
+		}
+	}
+
+	#[inline(always)]
+	pub fn get_line_location(&self) -> &LineLocation {
+		match self {
+			Token::PreNumber(l, _) |
+			Token::PreWord(l, _) |
+			Token::PreOperator(l, _) |
+			Token::PreGroupStart(l) |
+			Token::PreGroupEnd(l) |
+			Token::PreGroup(l, _)
+			=> l,
+
+			// These have a line location, but we shouldn't ever need to get it.
+			Token::Number(_l, _) |
+			Token::Constant(_l, _, _)
+			=> panic!(),
+
+
+			_ => panic!()
+		}
+	}
+
 	#[inline(always)]
 	fn as_number(&self) -> Token {
 		match self {

src/parser/evaluate.rs

@@ -9,17 +9,7 @@ fn get_at_coords<'a>(g: &'a mut Token, coords: &Vec<usize>) -> &'a mut Token {
 	let mut h = &mut *g;
 
 	for t in coords.iter() {
-		let inner = match h {
-			Token::Multiply(ref mut v) => v,
-			Token::Divide(ref mut v) => v,
-			Token::Add(ref mut v) => v,
-			Token::Factorial(ref mut v) => v,
-			Token::Negative(ref mut v) => v,
-			Token::Power(ref mut v) => v,
-			Token::Modulo(ref mut v) => v,
-			_ => panic!()
-		};
-
+		let inner = h.get_args().unwrap();
 		h = &mut inner[*t];
 	}
 
@@ -37,17 +27,7 @@ pub fn p_evaluate(
 
 		let mut h = &mut g;
 		for t in coords.iter() {
-			let inner: Option<&mut VecDeque<Token>> = match h {
-				Token::Multiply(ref mut v)
-				| Token::Divide(ref mut v)
-				| Token::Add(ref mut v)
-				| Token::Factorial(ref mut v)
-				| Token::Negative(ref mut v)
-				| Token::Power(ref mut v)
-				| Token::Modulo(ref mut v)
-				=> Some(v),
-				_ => None
-			};
+			let inner = h.get_args();
 
 			if inner.is_none() || *t >= inner.as_ref().unwrap().len() {
 				coords.pop();

src/parser/treeify.rs

@@ -5,18 +5,6 @@ use crate::parser::LineLocation;
 use crate::parser::ParserError;
 use crate::parser::Operator;
 
-#[inline(always)]
-fn get_line_location(t: &Token) -> &LineLocation {
-	match t {
-		Token::PreNumber(l, _) |
-		Token::PreWord(l, _) |
-		Token::PreOperator(l, _) |
-		Token::PreGroup(l, _)
-		=> l,
-		_ => panic!()
-	}
-}
-
 #[inline(always)]
 fn select_op(k: Operator, mut new_token_args: VecDeque<Token>) -> Token {
 	match k {
@@ -87,7 +75,7 @@ fn treeify_binary(
 			=> {
 				// Binary and right-unary operators cannot
 				// follow a binary operator.
-				let LineLocation { pos: posa, .. } = *get_line_location(&this);
+				let LineLocation { pos: posa, .. } = *this.get_line_location();
 				let LineLocation { pos: posb, len: lenb } = *l;
 				return Err((
 					LineLocation{pos: posa, len: posb - posa + lenb},
@@ -184,7 +172,7 @@ fn treeify_unaryleft(
 			=> {
 				// Binary and right-unary operators cannot
 				// follow a binary operator.
-				let LineLocation { pos: posa, .. } = *get_line_location(&this);
+				let LineLocation { pos: posa, .. } = *this.get_line_location();
 				let LineLocation { pos: posb, len: lenb } = *l;
 				return Err((
 					LineLocation{pos: posa, len: posb - posa + lenb},
@@ -273,7 +261,7 @@ fn treeify_unaryright(
 			match o {
 				// Left unary operators
 				Operator::Negative => {
-					let LineLocation { pos: posa, .. } = *get_line_location(&this);
+					let LineLocation { pos: posa, .. } = *this.get_line_location();
 					let LineLocation { pos: posb, len: lenb } = *l;
 					return Err((
 						LineLocation{pos: posa, len: posb - posa + lenb},
@@ -284,14 +272,14 @@ fn treeify_unaryright(
 			};
 		} else {
 			return Err((
-				*get_line_location(&this),
+				*this.get_line_location(),
 				ParserError::Syntax
 			));
 		}
 	}
 
 	if let Token::PreOperator(l, _) = left {
-		let LineLocation { pos: posa, .. } = *get_line_location(&this);
+		let LineLocation { pos: posa, .. } = *this.get_line_location();
 		let LineLocation { pos: posb, len: lenb } = *l;
 		return Err((
 			LineLocation{pos: posa, len: posb - posa + lenb},