Merge v1.0.1

Cargo.lock

@@ -28,7 +28,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "daisycalc"
-version = "1.0.0"
+version = "1.0.1"
 dependencies = [
  "cfg-if",
  "rug",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "daisycalc"
-version = "1.0.0"
+version = "1.0.1"
 edition = "2021"
 build = "buildscript/main.rs"
 license = "GPL-3.0-only"

README.md

@@ -5,6 +5,7 @@ A high-precision scientific calculator with support for units, derivatives, and
 Many features are missing, this is still under development.
 
 # 📦 Installation
+ - **Cargo:** `cargo install daisycalc`
  - **Arch:** `yay -S daisy`
  - **Debian:** coming soon
 
@@ -14,7 +15,7 @@ Binary will be in `target/release/daisy`
 
 # 📹 Screenshot
 
-![](https://betalupi.com/static/git/daisy.png)
+![Screenshot](https://github.com/rm-dr/daisy/assets/96270320/cc71887a-0fde-46b2-a13b-96b05098b158)
 
 # 🛠️ Features
  - Open-source
@@ -65,4 +66,4 @@ Daisy instead provides four functions (`fromCelsius`, `toCelsius`, `fromFahrenhe
 
 ## Multiplication Order
 
-Implicit multiplication has a higher priority than division. `pi/2 radians` will parse as `pi/(2 radians)`. Type `(pi/2) radians` or `pi/2 * radians` to get 90 degrees.
+Implicit multiplication has a higher priority than division. `pi/2 radians` will parse as `pi/(2 radians)`. Type `(pi/2) radians` or `pi/2 * radians` to get 90 degrees.

TODO.md

@@ -3,7 +3,8 @@
  - run cargo test
  - commit
  - git tag -a v1.0.0 -m "Version 1.0.0"
- - push
+ - git push
+ - git push origin v1.0.0
  - cargo publish
  - Update packages
 
@@ -26,11 +27,6 @@
  - Optional history file
  - daisyrc file
  - Compile to WASM, publish a webapp
- - Options:
-   - disable replacement
-   - disable special characters
-   - 1/ as -1 power toggle
-   - powers as superscripts toggle
  - evaluate straight from command line
  - Auto-push to crates.io
  - Package for debian

src/command/mod.rs

@@ -44,8 +44,8 @@ fn greeter() -> FormattedText {
 
 #[inline(always)]
 pub fn do_command(
+	context: &mut Context,
 	s: &String,
-	context: &mut Context
 ) -> FormattedText {
 	let args: Vec<&str> = s.split(" ").collect();
 	let first = args[0];
@@ -170,7 +170,7 @@ pub fn do_command(
 
 					t.push(&format!(
 						"  {key}{padding} = [c]{v}[n]\n",
-						v = value.to_string(),
+						v = value.display(context),
 					));
 				}
 			}
@@ -184,7 +184,7 @@ pub fn do_command(
 
 					t.push(&format!(
 						"  {s}{padding} = [c]{v}[n]\n",
-						v = exp.to_string(),
+						v = exp.display(context),
 					));
 				}
 			}
@@ -230,7 +230,7 @@ pub fn do_command(
 			}
 
 			let v = args[1].to_string();
-			let v = substitute(&v, context);
+			let v = substitute(context, &v);
 			let r = context.delete(&v);
 
 			return match r {

src/context.rs

@@ -3,7 +3,68 @@ use crate::quantity::freeunit_from_string;
 use std::collections::HashMap;
 
 #[derive(Debug)]
+#[derive(Clone)]
+pub struct Config {
+
+	// How to color terminal text.
+	// 0: No colors
+	// 1: ANSI-compatible, 8 colors
+	// 2: Full 256 color and special styles
+	pub term_color_type: u8,
+
+	// Should we accept input and print in unicode?
+	//pub enable_unicode: bool,
+
+	// Should we replace certain strings (like "pi")
+	// with prettier unicode alternatives?
+	//
+	// Automatically disabled if enable_unicode is off.
+	//pub enable_substituion: bool,
+
+	// Should we print simple powers
+	// as unicode superscript chars?
+	//
+	// Automatically disables if enable_unicode is off.
+	pub enable_super_powers: bool,
+
+	// Should we write "one-over" fractions
+	// as -1 powers?
+	//
+	// Automatically disabled if enable_super_powers is off.
+	pub enable_one_over_power: bool,
+}
+
+impl Config {
+	pub fn new() -> Config {
+		Config{
+			term_color_type: 2,
+			//enable_substituion: true,
+			//enable_unicode: true,
+			enable_super_powers: true,
+			enable_one_over_power: true
+		}
+	}
+
+	pub fn check(&mut self) {
+		//if !self.enable_unicode {
+		//	self.enable_substituion = false;
+		//	self.enable_super_powers = false;
+		//}
+
+		if !self.enable_super_powers {
+			self.enable_one_over_power = false
+		}
+	}
+}
+
+
+
+
+#[derive(Debug)]
+#[derive(Clone)]
 pub struct Context {
+	pub config: Config,
+
 	history: Vec<Expression>,
 	variables: HashMap<String, Expression>,
 	functions: HashMap<String, (Vec<String>, Expression)>,
@@ -16,6 +77,7 @@ pub struct Context {
 impl Context {
 	pub fn new() -> Context {
 		Context{
+			config: Config::new(),
 			history: Vec::new(),
 			variables: HashMap::new(),
 			functions: HashMap::new(),
@@ -84,10 +146,10 @@ impl Context {
 	}
 
 	pub fn is_varible(&self, s: &str) -> bool {
-		return self.valid_varible(s) && (
+		return {
-			self.variables.contains_key(s) ||
+			self.valid_varible(s) &&
-			self.shadow.contains_key(s)
+			(self.variables.contains_key(s) || self.shadow.contains_key(s))
-		);
+		};
 	}
 
 	pub fn get_variables(&self) -> &HashMap<String, Expression> {

src/entrypoint/unix/promptbuffer.rs

@@ -37,9 +37,9 @@ impl PromptBuffer {
 	}
 
 	// Same as write_primpt, but pretends there is no cursor
-	pub fn write_prompt_nocursor(&mut self, stdout: &mut RawTerminal<std::io::Stdout>, context: &Context) -> Result<(), std::io::Error> {
+	pub fn write_prompt_nocursor(&mut self, context: &Context, stdout: &mut RawTerminal<std::io::Stdout>) -> Result<(), std::io::Error> {
 		// Draw prettyprinted expression
-		let (_, s) = substitute_cursor(&self.get_contents(), self.buffer.chars().count(), context);
+		let (_, s) = substitute_cursor(context, &self.get_contents(), self.buffer.chars().count());
 
 		write!(
 			stdout, "\r{}{}==>{}{} {}",
@@ -64,12 +64,12 @@ impl PromptBuffer {
 		return Ok(());
 	}
 
-	pub fn write_prompt(&mut self, stdout: &mut RawTerminal<std::io::Stdout>, context: &Context) -> Result<(), std::io::Error> {
+	pub fn write_prompt(&mut self, context: &Context, stdout: &mut RawTerminal<std::io::Stdout>) -> Result<(), std::io::Error> {
 		let l = self.buffer.chars().count();
 		let i = if l == 0 {0} else {l - self.cursor};
 
 		// Draw prettyprinted expression
-		let (display_cursor, s) = substitute_cursor(&self.get_contents(), i, context);
+		let (display_cursor, s) = substitute_cursor(context, &self.get_contents(), i);
 
 		write!(
 			stdout, "\r{}{}==>{}{} {}",

src/entrypoint/unix/unix.rs

@@ -1,4 +1,3 @@
-use std::io::Write;
 use std::io::stdout;
 use std::io::stdin;
 use std::env;
@@ -6,35 +5,63 @@ use std::env;
 use termion::{
 	event::Key,
 	input::TermRead,
-	raw::IntoRawMode
+	raw::IntoRawMode,
+	color::DetectColors
 };
 
 use super::promptbuffer::PromptBuffer;
 use crate::command;
 use crate::context::Context;
-
+use crate::FormattedText;
 
 #[inline(always)]
 pub fn main() -> Result<(), std::io::Error> {
 	let mut stdout = stdout().into_raw_mode().unwrap();
 	let mut pb: PromptBuffer = PromptBuffer::new(64);
-	let mut context: Context = Context::new();
+	let mut context = Context::new();
+
+	// Set color compatibilty
+	let term_colors = stdout.available_colors().unwrap_or(0);
+	if term_colors >= 256 {
+		context.config.term_color_type = 2
+	} else if term_colors >= 8 {
+		context.config.term_color_type = 1
+	} else {
+		context.config.term_color_type = 0
+	}
+
+	context.config.check();
+
 
 
 	// Handle command-line arguments
 	let args: Vec<String> = env::args().collect();
 	if args.iter().any(|s| s == "--help") {
-		let t = command::do_command(&String::from("help"), &mut context);
+		let t = command::do_command(&mut context, &String::from("help"));
-		t.write(&mut stdout)?;
+		t.write(&context, &mut stdout)?;
 		return Ok(());
 	} else if args.iter().any(|s| s == "--version") {
-		write!(stdout, "Daisy v{}\r\n", env!("CARGO_PKG_VERSION"))?;
+		let t = FormattedText::new(format!(
+			"Daisy v{}\n", env!("CARGO_PKG_VERSION")
+		));
+		t.write(&context, &mut stdout)?;
+		return Ok(());
+	} else if args.iter().any(|s| s == "--debug") {
+		let t = FormattedText::new(format!(
+			concat!(
+				"Daisy v{}\n",
+				"Your terminal supports {} colors.\n"
+			),
+			env!("CARGO_PKG_VERSION"),
+			term_colors
+		));
+		t.write(&context, &mut stdout)?;
 		return Ok(());
 	}
 
 	'outer: loop {
 
-		pb.write_prompt(&mut stdout, &context)?;
+		pb.write_prompt(&mut context, &mut stdout)?;
 
 		let stdin = stdin();
 		for c in stdin.keys() {
@@ -43,19 +70,19 @@ pub fn main() -> Result<(), std::io::Error> {
 					'\n' => {
 						// Print again without cursor, in case we pressed enter
 						// while inside a substitution
-						pb.write_prompt_nocursor(&mut stdout, &context)?;
+						pb.write_prompt_nocursor(&mut context, &mut stdout)?;
 						let in_str = pb.enter();
-						write!(stdout, "\r\n")?;
+						FormattedText::newline(&mut stdout)?;
 						if in_str == "" { break; }
 
 						if in_str.trim() == "quit" {
 							break 'outer;
 						} else {
-							let r = crate::do_string(&in_str, &mut context);
+							let r = crate::do_string(&mut context, &in_str);
 
 							match r {
 								Ok(t) | Err(t) => {
-									t.write(&mut stdout).unwrap();
+									t.write(&context, &mut stdout).unwrap();
 								}
 							}
 						}
@@ -79,10 +106,10 @@ pub fn main() -> Result<(), std::io::Error> {
 				};
 			};
 
-			pb.write_prompt(&mut stdout, &context)?;
+			pb.write_prompt(&mut context, &mut stdout)?;
 		}
 	}
 
-	write!(stdout, "\r\n")?;
+	FormattedText::newline(&mut stdout)?;
 	return Ok(());
 }

src/evaluate/evaluate.rs

@@ -9,8 +9,8 @@ use super::function::eval_function;
 
 
 pub fn evaluate(
-	t: &Expression,
+	context: &mut Context,
-	context: &mut Context
+	t: &Expression
 ) -> Result<
 	Expression,
 	(LineLocation, DaisyError)
@@ -51,7 +51,7 @@ pub fn evaluate(
 			let new = match g {
 				Expression::Quantity(_, _) => None,
 				Expression::Tuple(_, _) => None,
-				Expression::Constant(_, c) => { Some(evaluate(&c.value(), context).unwrap()) },
+				Expression::Constant(_, c) => { Some(evaluate(context, &c.value()).unwrap()) },
 				Expression::Variable(l, s) => {
 					// Don't move up, re-evaluate
 					// This makes variables containing floating variables work properly
@@ -64,7 +64,7 @@ pub fn evaluate(
 					context.get_variable(&s)
 				},
 				Expression::Operator(_, Operator::Function(_), _) => { Some(eval_function(g)?) },
-				Expression::Operator(_, _, _) => { eval_operator(g, context)? },
+				Expression::Operator(_, _, _) => { eval_operator(context, g)? },
 			};
 
 			if let Some(mut new) = new {

src/evaluate/operator.rs

@@ -7,7 +7,7 @@ use crate::errors::DaisyError;
 use super::evaluate;
 
 
-pub fn eval_operator(g: &Expression, context: &mut Context) -> Result<Option<Expression>, (LineLocation, DaisyError)> {
+pub fn eval_operator(context: &mut Context, g: &Expression) -> Result<Option<Expression>, (LineLocation, DaisyError)> {
 
 	let Expression::Operator(op_loc, op, args) = g else {panic!()};
 
@@ -52,7 +52,7 @@ pub fn eval_operator(g: &Expression, context: &mut Context) -> Result<Option<Exp
 			}
 
 
-			let r = evaluate(&exp, context)?;
+			let r = evaluate(context, &exp)?;
 			context.clear_shadow();
 
 			return Ok(Some(r));
@@ -78,8 +78,8 @@ pub fn eval_operator(g: &Expression, context: &mut Context) -> Result<Option<Exp
 						return Err((
 							*la + *lb + *op_loc,
 							DaisyError::IncompatibleUnits(
-								a.convert_to_base().unit.to_string(),
+								a.convert_to_base().unit.display(context),
-								b.convert_to_base().unit.to_string()
+								b.convert_to_base().unit.display(context)
 							)
 						));
 					}
@@ -101,8 +101,8 @@ pub fn eval_operator(g: &Expression, context: &mut Context) -> Result<Option<Exp
 						return Err((
 							*la + *lb + *op_loc,
 							DaisyError::IncompatibleUnits(
-								a.convert_to_base().unit.to_string(),
+								a.convert_to_base().unit.display(context),
-								b.convert_to_base().unit.to_string()
+								b.convert_to_base().unit.display(context)
 							)
 						));
 					}
@@ -179,8 +179,8 @@ pub fn eval_operator(g: &Expression, context: &mut Context) -> Result<Option<Exp
 						return Err((
 							*la + *lb + *op_loc,
 							DaisyError::IncompatibleUnits(
-								va.convert_to_base().unit.to_string(),
+								va.convert_to_base().unit.display(context),
-								vb.convert_to_base().unit.to_string()
+								vb.convert_to_base().unit.display(context)
 							)
 						));
 					}

src/formattedtext.rs

@@ -5,6 +5,7 @@ use termion::style;
 use termion::clear;
 use termion::cursor;
 use std::ops::Add;
+use crate::context::Context;
 
 
 #[derive(Debug)]
@@ -18,8 +19,92 @@ impl ToString for FormattedText {
 }
 
 
-impl FormattedText {
+fn format_map_none(c: char) -> Option<String> {
+	Some(match c {
+		'n'|'i'|'t'|'a'|
+		'e'|'c'|'s'|'r'
+		=> { "".to_string() },
+		_ => { return None }
+	})
+}
 
+
+fn format_map_ansi(c: char) -> Option<String> {
+	Some(match c {
+		'n' => { // Normal text
+			format!("{}{}", color::Fg(color::Reset), color::Bg(color::Reset))
+		},
+		'i' => { // Normal italic text
+			format!("{}{}", color::Fg(color::Reset), color::Bg(color::Reset))
+		},
+		't' => { // Title text
+			format!("{}{}", color::Fg(color::AnsiValue(6)), color::Bg(color::Reset))
+		},
+		'a' => { // Colored text
+			format!("{}{}", color::Fg(color::AnsiValue(5)), color::Bg(color::Reset))
+		},
+		'e' => { // Error titles
+			format!("{}{}", color::Fg(color::AnsiValue(1)), color::Bg(color::Reset))
+		},
+		'c' => { // Console text
+			format!("{}{}", color::Fg(color::AnsiValue(0)), color::Bg(color::AnsiValue(7)))
+		},
+		's' => { // Repeat prompt (how => is styled)
+			format!("{}{}", color::Fg(color::AnsiValue(2)), color::Bg(color::Reset))
+		},
+		'r' => { // Result prompt (how = is styled)
+			format!("{}{}", color::Fg(color::AnsiValue(4)), color::Bg(color::Reset))
+		},
+
+		_ => { return None }
+	})
+}
+
+
+fn format_map_full(c: char) -> Option<String> {
+	Some(match c {
+		'n' => { // Normal text
+			format!("{}{}", color::Fg(color::Reset), style::Reset)
+		},
+		'i' => { // Normal italic text
+			format!("{}{}", color::Fg(color::Reset), style::Italic)
+		},
+		't' => { // Title text
+			format!("{}{}", color::Fg(color::Magenta), style::Bold)
+		},
+		'a' => { // Colored text
+			format!("{}{}", color::Fg(color::Magenta), style::Reset)
+		},
+		'e' => { // Error titles
+			format!("{}{}", color::Fg(color::Red), style::Bold)
+		},
+		'c' => { // Console text
+			format!("{}{}", color::Fg(color::LightBlack), style::Italic)
+		},
+		's' => { // Repeat prompt (how => is styled)
+			format!("{}{}", color::Fg(color::Magenta), style::Bold)
+		},
+		'r' => { // Result prompt (how = is styled)
+			format!("{}{}", color::Fg(color::Green), style::Bold)
+		},
+
+		_ => { return None }
+	})
+}
+
+
+impl FormattedText {
+	pub fn newline(stdout: &mut RawTerminal<std::io::Stdout>) -> Result<(), std::io::Error> {
+		write!(
+			stdout,
+			"\r\n",
+		)?;
+		return Ok(());
+	}
+}
+
+
+impl FormattedText {
 	pub fn new(s: String) -> FormattedText {
 		return FormattedText {
 			text: s
@@ -31,7 +116,7 @@ impl FormattedText {
 	}
 
 
-	pub fn write(&self, stdout: &mut RawTerminal<std::io::Stdout>) -> Result<(), std::io::Error> {
+	pub fn write(&self, context: &Context, stdout: &mut RawTerminal<std::io::Stdout>) -> Result<(), std::io::Error> {
 
 		if self.text == "[clear]" {
 			write!(
@@ -58,30 +143,22 @@ impl FormattedText {
 					let b = chars.next().unwrap();
 
 					match (a, b) {
-						('n', ']') => { // Normal text
+						(c, ']') => { // Normal text
-							s.push_str(&format!("{}{}", color::Fg(color::Reset), style::Reset));
-						},
-						('i', ']') => { // Normal italic text
-							s.push_str(&format!("{}{}", color::Fg(color::Reset), style::Italic));
-						},
-						('t', ']') => { // Title text
-							s.push_str(&format!("{}{}", color::Fg(color::Magenta), style::Bold));
-						},
-						('a', ']') => { // Colored text
-							s.push_str(&format!("{}{}", color::Fg(color::Magenta), style::Reset));
-						},
-						('e', ']') => { // Error titles
-							s.push_str(&format!("{}{}", color::Fg(color::Red), style::Bold));
-						},
-						('c', ']') => { // Console text
-							s.push_str(&format!("{}{}", color::Fg(color::LightBlack), style::Italic));
-						},
 
-						('s', ']') => { // Repeat prompt (how => is styled)
+							let q = match context.config.term_color_type {
-							s.push_str(&format!("{}{}", color::Fg(color::Magenta), style::Bold));
+								0 => format_map_none(c),
-						},
+								1 => format_map_ansi(c),
-						('r', ']') => { // Result prompt (how = is styled)
+								2 => format_map_full(c),
-							s.push_str(&format!("{}{}", color::Fg(color::Green), style::Bold));
+								_ => unreachable!("Invalid term_color_type")
+							};
+
+							if q.is_some() {
+								s.push_str(&q.unwrap());
+							} else {
+								s.push('[');
+								s.push(a);
+								s.push(b);
+							}
 						},
 
 						_ => {

src/main.rs

@@ -26,21 +26,21 @@ fn main() -> Result<(), std::io::Error> {
 
 #[inline(always)]
 pub fn do_string(
-	s: &String,
+	context: &mut Context,
-	mut context: &mut Context
+	s: &String
 ) -> Result<FormattedText, FormattedText> {
 
 	let r: (LineLocation, DaisyError);
 	if command::is_command(s) {
-		return Ok(command::do_command(s, &mut context));
+		return Ok(command::do_command(context, s));
 	} else if s.contains("=") {
-		let x = do_assignment(s, &mut context);
+		let x = do_assignment(context, s);
 		match x {
 			Ok(t) => { return Ok(t) },
 			Err(t) => { r = t }
 		};
 	} else {
-		let x = do_expression(s, &mut context);
+		let x = do_expression(context, s);
 		match x {
 			Ok((t, e)) => { context.push_hist(e); return Ok(t) },
 			Err(t) => { r = t }
@@ -73,25 +73,25 @@ pub fn do_string(
 // Returns a FormattedText with output that should be printed.
 #[inline(always)]
 fn do_expression(
-	s: &String,
+	context: &mut Context,
-	context: &mut Context
+	s: &String
 ) -> Result<(FormattedText, parser::Expression), (LineLocation, DaisyError)> {
 
 	let mut output = FormattedText::new("".to_string());
 
-	let g = parser::parse(&s, context)?;
+	let g = parser::parse(context, &s)?;
-	let g_evaluated = evaluate::evaluate(&g, context)?;
+	let g_evaluated = evaluate::evaluate(context, &g)?;
 
 	// Display parsed string
 	output.push(&format!(
 		" [s]=>[n] {}\n\n",
-		g.to_string()
+		g.display(context)
 	));
 
 	// Display result
 	output.push(&format!(
 		"  [r]=[n] {}\n\n",
-		g_evaluated.to_string_outer(),
+		g_evaluated.display_outer(context),
 	));
 
 	return Ok((output, g_evaluated));
@@ -102,8 +102,8 @@ fn do_expression(
 // Returns a FormattedText with output that should be printed.
 #[inline(always)]
 fn do_assignment(
-	s: &String,
+	context: &mut Context,
-	context: &mut Context
+	s: &String
 ) -> Result<FormattedText, (LineLocation, DaisyError)> {
 
 	let mut output = FormattedText::new("".to_string());
@@ -135,8 +135,8 @@ fn do_assignment(
 			.unwrap_or_else(|| parts[0].len());
 
 
-	let left = substitute(&parts[0].trim().to_string(), &context);
+	let left = substitute(context, &parts[0].trim().to_string());
-	let right = substitute(&parts[1].trim().to_string(), &context);
+	let right = substitute(context, &parts[1].trim().to_string());
 	let is_function = left.contains("(");
 
 	// The order of methods below is a bit odd.
@@ -212,7 +212,7 @@ fn do_assignment(
 		}
 
 		// Parse right hand side
-		let g = parser::parse(&right, context);
+		let g = parser::parse(context, &right);
 		let Ok(g) = g else {
 			let Err((l, e)) = g else { unreachable!() };
 			return Err((
@@ -224,12 +224,12 @@ fn do_assignment(
 		// Display parsed string
 		output.push(&format!(
 			" [s]=>[n] {left} = {}\n\n",
-			g.to_string()
+			g.display(context)
 		));
 
 		// Evaluate expression with shadow variables
 		for a in &args { context.add_shadow(a.to_string(), None);}
-		let g_evaluated = evaluate::evaluate(&g, context);
+		let g_evaluated = evaluate::evaluate(context, &g);
 		context.clear_shadow();
 		let Ok(_g_evaluated) = g_evaluated else {
 			let Err((l, e)) = g_evaluated else { unreachable!() };
@@ -254,7 +254,7 @@ fn do_assignment(
 		}
 
 		// Parse right hand side
-		let g = parser::parse(&right, context);
+		let g = parser::parse(context, &right);
 		let Ok(g) = g else {
 			let Err((l, e)) = g else { unreachable!() };
 			return Err((
@@ -266,11 +266,11 @@ fn do_assignment(
 		// Display parsed string
 		output.push(&format!(
 			" [t]=>[n] {left} = {}\n\n",
-			g.to_string()
+			g.display(context)
 		));
 
 		// Evaluate expression
-		let g_evaluated = evaluate::evaluate(&g, context);
+		let g_evaluated = evaluate::evaluate(context, &g);
 		let Ok(g_evaluated) = g_evaluated else {
 			let Err((l, e)) = g_evaluated else { unreachable!() };
 			return Err((

src/parser/expression/expression.rs

@@ -1,5 +1,6 @@
 use std::collections::VecDeque;
 use crate::quantity::Quantity;
+use crate::context::Context;
 
 use super::Operator;
 use super::Constant;
@@ -17,17 +18,17 @@ pub enum Expression {
 	Tuple(LineLocation, VecDeque<Expression>),
 }
 
-impl ToString for Expression {
+impl Expression {
-	fn to_string(&self) -> String {
+	pub fn display(&self, context: &Context) -> String {
 		match self {
-			Expression::Quantity(_, v) => v.to_string(),
+			Expression::Quantity(_, v) => v.display(context),
 			Expression::Constant(_, c) => c.to_string(),
 			Expression::Variable(_, s) => s.clone(),
-			Expression::Operator(_, o,a) => o.print(a),
+			Expression::Operator(_, o,a) => o.display(context, a),
 			Expression::Tuple(_, v) => {
 				format!("({})",
 					v.iter()
-						.map(|x| x.to_string())
+						.map(|x| x.display(context))
 						.collect::<Vec<String>>()
 						.join(", ")
 				)
@@ -39,16 +40,16 @@ impl ToString for Expression {
 impl Expression {
 	// This is called only when this is the outermost Expression.
 	// This sometimes leads to different--usually more verbose--behavior.
-	pub fn to_string_outer(&self) -> String {
+	pub fn display_outer(&self, context: &Context) -> String {
 		match self {
-			Expression::Quantity(_, v) => v.to_string_outer(),
+			Expression::Quantity(_, v) => v.display_outer(context),
 			Expression::Constant(_, c) => c.to_string(),
 			Expression::Variable(_, s) => s.clone(),
-			Expression::Operator(_, o,a) => o.print(a),
+			Expression::Operator(_, o,a) => o.display(context, a),
 			Expression::Tuple(_, v) => {
 				format!("({})",
 					v.iter()
-						.map(|x| x.to_string())
+						.map(|x| x.display(context))
 						.collect::<Vec<String>>()
 						.join(", ")
 				)

src/parser/expression/operator.rs

@@ -62,7 +62,7 @@ impl Operator {
 	}
 
 	#[inline(always)]
-	pub fn from_string(s: &str, context: &Context) -> Option<Operator> {
+	pub fn from_string(context: &Context, s: &str) -> Option<Operator> {
 
 		let f = Function::from_string(s);
 		if let Some(f) = f {
@@ -128,8 +128,8 @@ impl Operator {
 	}
 
 	#[inline(always)]
-	fn add_parens_to_arg(&self, arg: &Expression) -> String {
+	fn add_parens_to_arg(&self, context: &Context, arg: &Expression) -> String {
-		let mut astr: String = arg.to_string();
+		let mut astr: String = arg.display(context);
 		if let Expression::Operator(_, o,_) = arg {
 			if o.print_map() < self.print_map() {
 				astr = format!("({})", astr);
@@ -139,8 +139,8 @@ impl Operator {
 	}
 
 	#[inline(always)]
-	fn add_parens_to_arg_strict(&self, arg: &Expression) -> String {
+	fn add_parens_to_arg_strict(&self, context: &Context, arg: &Expression) -> String {
-		let mut astr: String = arg.to_string();
+		let mut astr: String = arg.display(context);
 		if let Expression::Operator(_, o,_) = arg {
 			if o.print_map() <= self.print_map() {
 				astr = format!("({})", astr);
@@ -150,56 +150,56 @@ impl Operator {
 	}
 
 
-	pub fn print(&self, args: &VecDeque<Expression>) -> String {
+	pub fn display(&self, context: &Context, args: &VecDeque<Expression>) -> String {
 		match self {
 			Operator::Negative => {
-				return format!("-{}", self.add_parens_to_arg(&args[0]));
+				return format!("-{}", self.add_parens_to_arg(context, &args[0]));
 			},
 
 			Operator::Sqrt => {
 				return format!(
 					"√{}",
-					self.add_parens_to_arg(&args[0]),
+					self.add_parens_to_arg(context, &args[0]),
 				);
 			},
 
 			Operator::ModuloLong => {
 				return format!(
 					"{} mod {}",
-					self.add_parens_to_arg(&args[0]),
+					self.add_parens_to_arg(context, &args[0]),
-					self.add_parens_to_arg(&args[1])
+					self.add_parens_to_arg(context, &args[1])
 				);
 			},
 
 			Operator::DivideLong => {
 				return format!(
 					"{} per {}",
-					self.add_parens_to_arg(&args[0]),
+					self.add_parens_to_arg(context, &args[0]),
-					self.add_parens_to_arg(&args[1])
+					self.add_parens_to_arg(context, &args[1])
 				);
 			},
 
 			Operator::UnitConvert => {
 				return format!(
 					"{} to {}",
-					self.add_parens_to_arg(&args[0]),
+					self.add_parens_to_arg(context, &args[0]),
-					self.add_parens_to_arg(&args[1])
+					self.add_parens_to_arg(context, &args[1])
 				);
 			},
 
 			Operator::Modulo => {
 				return format!(
 					"{} % {}",
-					self.add_parens_to_arg(&args[0]),
+					self.add_parens_to_arg(context, &args[0]),
-					self.add_parens_to_arg(&args[1])
+					self.add_parens_to_arg(context, &args[1])
 				);
 			},
 
 			Operator::Subtract => {
 				return format!(
 					"{} - {}",
-					self.add_parens_to_arg(&args[0]),
+					self.add_parens_to_arg(context, &args[0]),
-					self.add_parens_to_arg(&args[1])
+					self.add_parens_to_arg(context, &args[1])
 				);
 			},
 
@@ -207,10 +207,14 @@ impl Operator {
 
 				let q = &args[1];
 
-				if q.is_unitless_integer() && !q.to_string().contains("e") {
+				if {
+					context.config.enable_super_powers &&
+					q.is_unitless_integer() &&
+					!q.display(context).contains("e")
+				} {
 					// Write integer powers as a superscript
 					let mut b = String::new();
-					for c in q.to_string().chars() {
+					for c in q.display(context).chars() {
 						b.push(match c {
 							'-' => '⁻',
 							'0' => '⁰',
@@ -229,27 +233,27 @@ impl Operator {
 
 					return format!(
 						"{}{}",
-						self.add_parens_to_arg_strict(&args[0]),
+						self.add_parens_to_arg_strict(context, &args[0]),
 						b
 					);
 				} else {
 					return format!(
 						"{}^{}",
-						self.add_parens_to_arg_strict(&args[0]),
+						self.add_parens_to_arg_strict(context, &args[0]),
-						self.add_parens_to_arg_strict(&args[1])
+						self.add_parens_to_arg_strict(context, &args[1])
 					);
 				}
 			},
 
 			Operator::Factorial => {
-				return format!("{}!", self.add_parens_to_arg(&args[0]));
+				return format!("{}!", self.add_parens_to_arg(context, &args[0]));
 			},
 
 			Operator::Add => {
 				return format!(
 					"{} + {}",
-					self.add_parens_to_arg(&args[0]),
+					self.add_parens_to_arg(context, &args[0]),
-					self.add_parens_to_arg(&args[1])
+					self.add_parens_to_arg(context, &args[1])
 				);
 			},
 
@@ -279,26 +283,26 @@ impl Operator {
 					if let Expression::Quantity(_, u) = b {
 						if u.unit.no_space() {
 							return format!("{}{}",
-								self.add_parens_to_arg_strict(a),
+								self.add_parens_to_arg_strict(context, a),
-								self.add_parens_to_arg_strict(b)
+								self.add_parens_to_arg_strict(context, b)
 							);
 						} else {
 							return format!("{} {}",
-								self.add_parens_to_arg_strict(a),
+								self.add_parens_to_arg_strict(context, a),
-								self.add_parens_to_arg_strict(b)
+								self.add_parens_to_arg_strict(context, b)
 							);
 						}
 					} else {
 						return format!("{}{}",
-							self.add_parens_to_arg_strict(a),
+							self.add_parens_to_arg_strict(context, a),
-							self.add_parens_to_arg_strict(b)
+							self.add_parens_to_arg_strict(context, b)
 						);
 					};
 
 				} else {
 					return format!("{} × {}",
-						self.add_parens_to_arg_strict(a),
+						self.add_parens_to_arg_strict(context, a),
-						self.add_parens_to_arg_strict(b)
+						self.add_parens_to_arg_strict(context, b)
 					);
 				}
 			},
@@ -309,25 +313,25 @@ impl Operator {
 
 
 				if let Expression::Quantity(_, q) = a {
-					if q.is_one() {
+					if q.is_one() && context.config.enable_one_over_power {
 						return format!("{}⁻¹",
-							self.add_parens_to_arg_strict(b)
+							self.add_parens_to_arg_strict(context, b)
 						);
 					}
 				}
 
 				return format!("{} ÷ {}",
-					self.add_parens_to_arg_strict(a),
+					self.add_parens_to_arg_strict(context, a),
-					self.add_parens_to_arg_strict(b)
+					self.add_parens_to_arg_strict(context, b)
 				);
 			},
 
 			Operator::Function(s) => {
-				return format!("{}({})", s.to_string(), args[0].to_string());
+				return format!("{}({})", s.to_string(), args[0].display(context));
 			},
 
 			Operator::UserFunction(s) => {
-				return format!("{}({})", s.to_string(), args[0].to_string());
+				return format!("{}({})", s, args[0].display(context));
 			}
 		};
 	}

src/parser/mod.rs

@@ -18,30 +18,30 @@ use crate::context::Context;
 use crate::errors::DaisyError;
 
 pub fn parse(
-	s: &String, context: &Context
+	context: &Context, s: &String
 ) -> Result<Expression, (LineLocation, DaisyError)> {
 
-	let expressions = stage::tokenize(s, context);
+	let expressions = stage::tokenize(context, s);
 	let (_, expressions) = stage::find_subs(expressions);
-	let g = stage::groupify(expressions, context)?;
+	let g = stage::groupify(context, expressions)?;
-	let g = stage::treeify(g, context)?;
+	let g = stage::treeify(context, g)?;
 
 	return Ok(g);
 }
 
 pub fn parse_no_context(s: &String) -> Result<Expression, (LineLocation, DaisyError)> {
-	parse(s, &Context::new())
+	parse(&Context::new(), s)
 }
 
-pub fn substitute(s: &String, context: &Context) -> String {
+pub fn substitute(context: &Context, s: &String) -> String {
-	let (_, s) = substitute_cursor(s, s.chars().count(), context);
+	let (_, s) = substitute_cursor(context, s, s.chars().count());
 	return s;
 }
 
 pub fn substitute_cursor(
+	context: &Context,
 	s: &String, // The string to substitute
-	c: usize,   // Location of the cursor right now
+	c: usize    // Location of the cursor right now
-	context: &Context
 ) -> (
 	usize,  // Location of cursor in substituted string
 	String  // String with substitutions
@@ -50,7 +50,7 @@ pub fn substitute_cursor(
 	let mut new_s = s.clone();
 
 	let l = s.chars().count();
-	let expressions = stage::tokenize(s, context);
+	let expressions = stage::tokenize(context, s);
 	let (mut subs, _) = stage::find_subs(expressions);
 	let mut new_c = l - c;
 

src/parser/stage/groupify.rs

@@ -11,8 +11,8 @@ use crate::context::Context;
 
 
 fn lookback_signs(
-	g: &mut VecDeque<Token>,
+	context: &Context,
-	context: &Context
+	g: &mut VecDeque<Token>
 ) -> Result<(), (LineLocation, DaisyError)> {
 
 	// Convert `-` operators to `neg` operators
@@ -44,7 +44,7 @@ fn lookback_signs(
 				(Token::Operator(_, sa), Token::Operator(l,sb))
 				=> {
 					if {
-						let o = Operator::from_string(sa, context);
+						let o = Operator::from_string(context, sa);
 
 						o.is_some() &&
 						(
@@ -101,11 +101,11 @@ fn lookback_signs(
 
 // Inserts implicit operators
 fn lookback(
-	g: &mut VecDeque<Token>,
+	context: &Context,
-	context: &Context
+	g: &mut VecDeque<Token>
 ) -> Result<(), (LineLocation, DaisyError)> {
 
-	lookback_signs(g, context)?;
+	lookback_signs(context, g)?;
 
 	let mut i: usize = 0;
 	while i < g.len() {
@@ -142,7 +142,7 @@ fn lookback(
 				=> {
 					let la = la.clone();
 					let lb = lb.clone();
-					let o = Operator::from_string(s, context);
+					let o = Operator::from_string(context, s);
 
 					g.insert(i-1, b);
 					if o.is_some() {
@@ -164,7 +164,7 @@ fn lookback(
 				=> {
 					let la = la.clone();
 					let lb = lb.clone();
-					let o = Operator::from_string(s, context);
+					let o = Operator::from_string(context, s);
 
 					g.insert(i-1, b);
 					if o.is_some() {
@@ -196,8 +196,8 @@ fn lookback(
 
 
 pub fn groupify(
-	mut g: VecDeque<Token>,
+	context: &Context,
-	context: &Context
+	mut g: VecDeque<Token>
 ) -> Result<
 	Token,
 	(LineLocation, DaisyError)
@@ -240,7 +240,7 @@ pub fn groupify(
 
 				let (_, mut v) = levels.pop().unwrap();
 				let (_, v_now) = levels.last_mut().unwrap();
-				lookback(&mut v, context)?;
+				lookback(context, &mut v)?;
 
 				let q = is_tuple.pop().unwrap();
 				if q {
@@ -275,7 +275,7 @@ pub fn groupify(
 		let (_, v_now) = levels.last_mut().unwrap();
 
 		if v.len() == 0 { return Err((l, DaisyError::EmptyGroup)) }
-		lookback(&mut v, context)?;
+		lookback(context, &mut v)?;
 
 		let q = is_tuple.pop().unwrap();
 		if q {
@@ -294,7 +294,7 @@ pub fn groupify(
 		return Err((l, DaisyError::BadTuple));
 	}
 
-	lookback(&mut v, context)?;
+	lookback(context, &mut v)?;
 
 	return Ok(Token::Group(
 		LineLocation{pos:0, len:last_linelocation.pos + last_linelocation.len},

src/parser/stage/tokenize.rs

@@ -10,10 +10,10 @@ use super::super::{
 // Called whenever a token is finished.
 #[inline(always)]
 fn push_token(
+	context: &Context,
 	g: &mut VecDeque<Token>,
 	t: Option<Token>,
-	stop_i: usize,
+	stop_i: usize
-	context: &Context
 ) {
 
 	if t.is_none() { return }
@@ -60,7 +60,7 @@ fn push_token(
 
 	// Some operators are written as words.
 	if let Token::Word(l, s) = &t {
-		if Operator::from_string(s, context).is_some() {
+		if Operator::from_string(context, s).is_some() {
 			t = Token::Operator(*l, s.clone());
 		}
 	}
@@ -69,7 +69,7 @@ fn push_token(
 }
 
 /// Turns a string into Tokens. First stage of parsing.
-pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
+pub fn tokenize(context: &Context, input: &String) -> VecDeque<Token> {
 	let mut t: Option<Token> = None; // The current token we're reading
 	let mut g: VecDeque<Token> = VecDeque::with_capacity(32);
 
@@ -88,7 +88,7 @@ pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
 					// If we're not building a number, finalize
 					// previous token and start one.
 					_ => {
-						push_token(&mut g, t, i, context);
+						push_token(context, &mut g, t, i);
 						t = Some(Token::Quantity(LineLocation{pos: i, len: 0}, String::from(c)));
 					}
 				};
@@ -102,7 +102,7 @@ pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
 					Some(Token::Quantity(_, val)) => { val.push(c); },
 
 					_ => {
-						push_token(&mut g, t, i, context);
+						push_token(context, &mut g, t, i);
 						t = Some(Token::Word(LineLocation{pos: i, len: 0}, String::from(c)));
 					}
 				};
@@ -122,7 +122,7 @@ pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
 						} else {
 							// Otherwise, end the number.
 							// We probably have a subtraction.
-							push_token(&mut g, t, i, context);
+							push_token(context, &mut g, t, i);
 							t = Some(Token::Operator(
 								LineLocation{pos: i, len: 1},
 								String::from(c)
@@ -134,7 +134,7 @@ pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
 					// Multi-character operators with - and + are NOT supported!
 					// (for example, we can't use -> for unit conversion)
 					_ => {
-						push_token(&mut g, t, i, context);
+						push_token(context, &mut g, t, i);
 						t = Some(Token::Operator(
 							LineLocation{pos: i, len: 1},
 							String::from(c)
@@ -144,7 +144,7 @@ pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
 			},
 
 			',' => {
-				push_token(&mut g, t, i, context);
+				push_token(context, &mut g, t, i);
 				t = Some(Token::TupleDelim(LineLocation{pos: i, len: 1}));
 			},
 
@@ -157,7 +157,7 @@ pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
 				match &mut t {
 					Some(Token::Operator(_, val)) => { val.push(c); },
 					_ => {
-						push_token(&mut g, t, i, context);
+						push_token(context, &mut g, t, i);
 						t = Some(Token::Operator(LineLocation{pos: i, len: 0}, String::from(c)));
 					}
 				};
@@ -165,17 +165,17 @@ pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
 
 			// Group
 			'(' => {
-				push_token(&mut g, t, i, context);
+				push_token(context, &mut g, t, i);
 				t = Some(Token::GroupStart(LineLocation{pos: i, len: 0}));
 			},
 			')' => {
-				push_token(&mut g, t, i, context);
+				push_token(context, &mut g, t, i);
 				t = Some(Token::GroupEnd(LineLocation{pos: i, len: 0}));
 			},
 
 			// Space. Basic seperator.
 			' ' => {
-				push_token(&mut g, t, i, context);
+				push_token(context, &mut g, t, i);
 				t = None;
 			}
 
@@ -185,7 +185,7 @@ pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
 					Some(Token::Word(_, val)) => { val.push(c); },
 
 					_ => {
-						push_token(&mut g, t, i, context);
+						push_token(context, &mut g, t, i);
 						t = Some(Token::Word(LineLocation{pos: i, len: 0}, String::from(c)));
 					}
 				};
@@ -193,7 +193,7 @@ pub fn tokenize(input: &String, context: &Context) -> VecDeque<Token> {
 		};
 	}
 
-	push_token(&mut g, t, input.chars().count(), context);
+	push_token(context, &mut g, t, input.chars().count());
 
 	return g;
 }

src/parser/stage/treeify.rs

@@ -10,9 +10,9 @@ use super::super::{
 };
 
 fn treeify_binary(
+	context: &Context,
 	i: usize,
-	g_inner: &mut VecDeque<Token>,
+	g_inner: &mut VecDeque<Token>
-	context: &Context
 ) -> Result<bool, (LineLocation, DaisyError)> {
 
 	let this: &Token = &g_inner[i];
@@ -56,7 +56,7 @@ fn treeify_binary(
 
 
 	if let Token::Operator(l, s) = left {
-		let o = Operator::from_string(s, context);
+		let o = Operator::from_string(context, s);
 		if o.is_none() { return Err((*l, DaisyError::Syntax)); } // Bad string
 		let o = o.unwrap();
 
@@ -72,7 +72,7 @@ fn treeify_binary(
 	}
 
 	if let Token::Operator(l, s) = right {
-		let o = Operator::from_string(s, context);
+		let o = Operator::from_string(context, s);
 		if o.is_none() { return Err((*l, DaisyError::Syntax)); } // Bad string
 		let o = o.unwrap();
 
@@ -91,7 +91,7 @@ fn treeify_binary(
 	// This operator
 	let this_op = {
 		let Token::Operator(l, s) = this else {panic!()};
-		let o = Operator::from_string(s, context);
+		let o = Operator::from_string(context, s);
 		if o.is_none() { return Err((*l, DaisyError::Syntax)); } // bad operator string
 		o.unwrap()
 	};
@@ -99,14 +99,14 @@ fn treeify_binary(
 	// The operators contesting our arguments
 	let left_op = if i > 1 {
 		let Token::Operator(l, s) = &g_inner[i-2] else {panic!()};
-		let o = Operator::from_string(s, context);
+		let o = Operator::from_string(context, s);
 		if o.is_none() { return Err((*l, DaisyError::Syntax)); } // Bad operator string
 		Some(o.unwrap())
 	} else { None };
 
 	let right_op = if i < g_inner.len()-2 {
 		let Token::Operator(l, s) = &g_inner[i+2] else {panic!()};
-		let o = Operator::from_string(s, context);
+		let o = Operator::from_string(context, s);
 		if o.is_none() { return Err((*l, DaisyError::Syntax)); } // Bad operator string
 		Some(o.unwrap())
 	} else { None };
@@ -122,20 +122,20 @@ fn treeify_binary(
 		let right_pre = g_inner.remove(i-1).unwrap();
 		let mut left: Expression; let mut right: Expression;
 		if let Token::Group(l, _) = right_pre {
-			right = treeify(right_pre, context)?;
+			right = treeify(context, right_pre)?;
 			right.set_linelocation(&(right.get_linelocation() + l));
 		} else if let Token::Tuple(l, _) = right_pre {
-			right = treeify(right_pre, context)?;
+			right = treeify(context, right_pre)?;
 			right.set_linelocation(&(right.get_linelocation() + l));
 		} else {
 			right = right_pre.to_expression(context)?;
 		}
 
 		if let Token::Group(l, _) = left_pre {
-			left = treeify(left_pre, context)?;
+			left = treeify(context, left_pre)?;
 			left.set_linelocation(&(left.get_linelocation() + l));
 		} else if let Token::Tuple(l, _) = left_pre {
-			left = treeify(left_pre, context)?;
+			left = treeify(context, left_pre)?;
 			left.set_linelocation(&(left.get_linelocation() + l));
 		} else {
 			left = left_pre.to_expression(context)?;
@@ -143,7 +143,7 @@ fn treeify_binary(
 
 		let (l, o) = {
 			let Token::Operator(l, s) = this_pre else {panic!()};
-			let o = Operator::from_string(&s, context);
+			let o = Operator::from_string(context, &s);
 			if o.is_none() { panic!() }
 			(l, o.unwrap())
 		};
@@ -161,10 +161,10 @@ fn treeify_binary(
 }
 
 fn treeify_unary(
+	context: &Context,
 	i: usize,
 	g_inner: &mut VecDeque<Token>,
-	left_associative: bool,
+	left_associative: bool
-	context: &Context
 ) -> Result<bool, (LineLocation, DaisyError)> {
 
 	let this: &Token = &g_inner[i];
@@ -224,7 +224,7 @@ fn treeify_unary(
 		// This operator
 		let this_op = {
 			let Token::Operator(l, s) = this else {panic!()};
-			let o = Operator::from_string(s, context);
+			let o = Operator::from_string(context, s);
 				if o.is_none() { return Err((*l, DaisyError::Syntax)); } // Bad string
 			o.unwrap()
 		};
@@ -233,14 +233,14 @@ fn treeify_unary(
 		let next_op = if left_associative {
 			if i > 1 {
 				let Token::Operator(l, s) = &g_inner[i-2] else {panic!()};
-				let o = Operator::from_string(s, context);
+				let o = Operator::from_string(context, s);
 				if o.is_none() { return Err((*l, DaisyError::Syntax)); } // Bad string
 				Some(o.unwrap())
 			} else { None }
 		} else {
 			if i < g_inner.len()-2 {
 				let Token::Operator(l, s) = &g_inner[i+2] else {panic!()};
-				let o = Operator::from_string(s, context);
+				let o = Operator::from_string(context, s);
 				if o.is_none() { return Err((*l, DaisyError::Syntax)); } // Bad string
 				Some(o.unwrap())
 			} else { None }
@@ -255,10 +255,10 @@ fn treeify_unary(
 				next_pre = g_inner.remove(i).unwrap();
 			}
 			if let Token::Group(l, _) = next_pre {
-				next = treeify(next_pre, context)?;
+				next = treeify(context, next_pre)?;
 				next.set_linelocation(&(next.get_linelocation() + l));
 			} else if let Token::Tuple(l, _) = next_pre {
-				next = treeify(next_pre, context)?;
+				next = treeify(context, next_pre)?;
 				next.set_linelocation(&(next.get_linelocation() + l));
 			} else {
 				next = next_pre.to_expression(context)?;
@@ -267,7 +267,7 @@ fn treeify_unary(
 
 			let (l, o) = {
 				let Token::Operator(l, s) = this_pre else {panic!()};
-				let o = Operator::from_string(&s, context);
+				let o = Operator::from_string(context, &s);
 				if o.is_none() { panic!() }
 				(l, o.unwrap())
 			};
@@ -292,8 +292,8 @@ fn treeify_unary(
 
 
 pub fn treeify(
-	mut g: Token,
+	context: &Context,
-	context: &Context
+	mut g: Token
 ) -> Result<Expression, (LineLocation, DaisyError)> {
 
 	let (l, g_inner): (LineLocation, &mut VecDeque<Token>) = match g {
@@ -301,7 +301,7 @@ pub fn treeify(
 		Token::Tuple(l, parts) => {
 			let mut t: VecDeque<Expression> = VecDeque::new();
 			for p in parts {
-				t.push_back(treeify(p, context)?);
+				t.push_back(treeify(context, p)?);
 			};
 
 			return Ok(Expression::Tuple(l, t));
@@ -332,7 +332,7 @@ pub fn treeify(
 		// If not an operator, move on.
 		let this_op = match &g_inner[i] {
 			Token::Operator(l, s) => {
-				let o = Operator::from_string(&s, context);
+				let o = Operator::from_string(context, &s);
 				if o.is_none() { return Err((*l, DaisyError::Syntax)); }
 				o.unwrap()
 			},
@@ -346,9 +346,9 @@ pub fn treeify(
 			let mut changed = false;
 			if this_op.is_left_associative() {
 				if this_op.is_binary() {
-					changed = treeify_binary(i, g_inner, context)?;
+					changed = treeify_binary(context, i, g_inner)?;
 				} else {
-					changed = treeify_unary(i, g_inner, left_associative, context)?;
+					changed = treeify_unary(context, i, g_inner, left_associative)?;
 				}
 			}
 
@@ -360,9 +360,9 @@ pub fn treeify(
 		} else {
 			if !this_op.is_left_associative() {
 				if this_op.is_binary() {
-					treeify_binary(i, g_inner, context)?;
+					treeify_binary(context, i, g_inner)?;
 				} else {
-					treeify_unary(i, g_inner, left_associative, context)?;
+					treeify_unary(context, i, g_inner, left_associative)?;
 				}
 			}
 			j -= 1
@@ -378,7 +378,7 @@ pub fn treeify(
 		},
 		Token::Tuple(_, _) |
 		Token::Group(_,_) => {
-			treeify(g, context)
+			treeify(context, g)
 		},
 
 

src/quantity/quantity.rs

@@ -7,6 +7,7 @@ use std::ops::{
 };
 use std::cmp::Ordering;
 
+use crate::context::Context;
 use crate::quantity::Unit;
 use crate::quantity::FreeUnit;
 
@@ -21,12 +22,12 @@ pub struct Quantity {
 
 
 
-impl ToString for Quantity {
+impl Quantity {
-	fn to_string(&self) -> String {
+	pub fn display(&self, context: &Context) -> String {
 		let n = self.scalar.to_string();
 		if self.unitless() { return n; }
 
-		let u = self.unit.to_string();
+		let u = self.unit.display(context);
 		if self.is_one() { return u; };
 
 		if self.unit.no_space() {
@@ -38,11 +39,11 @@ impl ToString for Quantity {
 }
 
 impl Quantity {
-	pub fn to_string_outer(&self) -> String {
+	pub fn display_outer(&self, context: &Context) -> String {
 		let n = self.scalar.to_string();
 		if self.unitless() { return n; }
 
-		let u = self.unit.to_string();
+		let u = self.unit.display(context);
 		if self.unit.no_space() {
 			return format!("{n}{u}");
 		} else {

src/quantity/unit/unit.rs

@@ -4,6 +4,7 @@ use std::ops::{
 	MulAssign, DivAssign
 };
 
+use crate::context::Context;
 use crate::quantity::Scalar;
 use crate::quantity::Quantity;
 use super::FreeUnit;
@@ -16,8 +17,8 @@ pub struct Unit {
 	pub val: HashMap<FreeUnit, Scalar>
 }
 
-impl ToString for Unit {
+impl Unit {
-	fn to_string(&self) -> String {
+	pub fn display(&self, context: &Context) -> String {
 
 		if self.unitless() { return String::new(); };
 
@@ -37,7 +38,11 @@ impl ToString for Unit {
 
 			if *p == Scalar::new_rational(1f64).unwrap() {
 				t.push_str(&format!("{c}·"));
-			} else if p.is_int() && !p.to_string().contains("e"){
+			} else if {
+				context.config.enable_super_powers &&
+				p.is_int() &&
+				!p.to_string().contains("e")
+			} {
 				t.push_str(&c);
 				for c in p.to_string().chars() {
 					t.push( match c {
@@ -74,7 +79,11 @@ impl ToString for Unit {
 			bottom_count += 1;
 			if t.len() != 0 && *p == Scalar::new_rational(-1f64).unwrap() {
 				b.push_str(&format!("{c}·"));
-			} else if p.is_int() && !p.to_string().contains("e") {
+			} else if {
+				context.config.enable_super_powers &&
+				p.is_int() &&
+				!p.to_string().contains("e")
+			} {
 				b.push_str(&c);
 				for c in p.to_string().chars() {
 					if c == '-' && t.len() != 0 { continue; }

src/tests.rs

@@ -10,8 +10,10 @@ fn eval_to_str(s: &str) -> Result<String, ()> {
 	};
 	//let out_str = g.print();
 
-	return match evaluate(&g, &mut Context::new()) {
+	let mut c = Context::new();
-		Ok(x) => Ok(x.to_string_outer()),
+
+	return match evaluate(&mut c, &g) {
+		Ok(x) => Ok(x.display_outer(&c)),
 		Err(_) => Err(())
 	};
 }