use std::time::{Instant};
use decimal::d128;
use crate::units::Unit;
pub mod units;
pub mod lexer;
pub mod parser;
pub mod evaluator;
mod lookup;
#[derive(Clone, Debug)]
pub struct Number {
pub value: d128,
pub unit: Unit,
}
impl Number {
pub fn new(value: d128, unit: Unit) -> Number {
Number {
value: value,
unit: unit,
}
}
}
#[derive(Clone, Debug)]
pub enum Operator {
Plus,
Minus,
Multiply,
Divide,
Modulo,
Caret,
LeftParen, RightParen, }
#[derive(Clone, Debug)]
pub enum UnaryOperator {
Percent,
Factorial,
}
#[derive(Clone, Debug)]
pub enum TextOperator {
To,
Of,
}
#[derive(Clone, Debug)]
pub enum Constant {
Pi,
E,
}
#[derive(Clone, Debug)]
pub enum FunctionIdentifier {
Sqrt,
Cbrt,
Log,
Ln,
Exp,
Round,
Ceil,
Floor,
Abs,
Sin,
Cos,
Tan,
}
#[derive(Clone, Debug)]
pub enum LexerKeyword {
Per,
PercentChar,
In,
DoubleQuotes,
Mercury,
Hg,
PoundForce,
PoundWord,
Force,
}
#[derive(Clone, Debug)]
pub enum Token {
Operator(Operator),
UnaryOperator(UnaryOperator),
Number(d128),
FunctionIdentifier(FunctionIdentifier),
Constant(Constant),
Paren,
Per,
LexerKeyword(LexerKeyword),
TextOperator(TextOperator),
Negative,
Unit(units::Unit),
}
pub type TokenVector = Vec<Token>;
pub fn eval(input: &str, allow_trailing_operators: bool, default_degree: Unit, debug: bool) -> Result<Number, String> {
let lex_start = Instant::now();
match lexer::lex(input, allow_trailing_operators, default_degree) {
Ok(tokens) => {
let lex_time = Instant::now().duration_since(lex_start).as_nanos() as f32;
let parse_start = Instant::now();
match parser::parse(&tokens) {
Ok(ast) => {
let parse_time = Instant::now().duration_since(parse_start).as_nanos() as f32;
let eval_start = Instant::now();
match evaluator::evaluate(&ast) {
Ok(answer) => {
let eval_time = Instant::now().duration_since(eval_start).as_nanos() as f32;
if debug == true {
println!("Lexed TokenVector: {:?}", tokens);
println!("Parsed AstNode: {:#?}", ast);
println!("Evaluated value: {} {:?}", answer.value, answer.unit);
println!("\u{23f1} {:.3}ms lexing", lex_time/1000.0/1000.0);
println!("\u{23f1} {:.3}ms parsing", parse_time/1000.0/1000.0);
println!("\u{23f1} {:.3}ms evaluation", eval_time/1000.0/1000.0);
}
return Ok(answer)
},
Err(e) => Err(format!("Eval error: {}", e)),
}
},
Err(e) => Err(format!("Parsing error: {}", e)),
}
},
Err(e) => Err(format!("Lexing error: {}", e)),
}
}