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Added decimal -> rational parsing

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Mark
2023-04-01 14:20:11 -07:00
parent f97805b24e
commit bb48a09cc7
3 changed files with 40 additions and 9 deletions
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18
src/parser/mod.rs
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@ -73,19 +73,21 @@ impl PreToken {
pub fn to_token(self) -> Result<Token, (LineLocation, ParserError)>{
match self {
PreToken::PreNumber(l, s) => {
let n: f64 = match s.parse() {
Ok(n) => n,
Err(_) => return Err((l, ParserError::BadNumber))
};
return Ok(Token::Number(Quantity::new_rational_from_f64(n).unwrap()));
let r = Quantity::new_rational_from_float_string(&s);
if r.is_none() {
return Err((l, ParserError::BadNumber))
}
return Ok(Token::Number(r.unwrap()));
},
PreToken::PreWord(l, s) => {
return Ok(match &s[..] {
// Mathematical constants
// 100 digits of each.
"π"|"pi" => { Token::Constant(Quantity::float_from_string("3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067"), String::from("π")) },
"e" => { Token::Constant(Quantity::float_from_string("2.7182818284590452353602874713526624977572470936999595749669676277240766303535475945713 8217852516642"), String::from("e")) },
"phi"|"φ" => { Token::Constant(Quantity::float_from_string("1.618033988749894848204586834365638117720309179805762862135448622705260462818902449707207204189391137"), String::from("φ")) },
"π"|"pi" => { Token::Constant(Quantity::new_float_from_string("3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067"), String::from("π")) },
"e" => { Token::Constant(Quantity::new_float_from_string("2.7182818284590452353602874713526624977572470936999595749669676277240766303535475945713 8217852516642"), String::from("e")) },
"phi"|"φ" => { Token::Constant(Quantity::new_float_from_string("1.618033988749894848204586834365638117720309179805762862135448622705260462818902449707207204189391137"), String::from("φ")) },
_ => { return Err((l, ParserError::Undefined(s))); }
});