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feat: Hover for literals showing additional value information

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This commit is contained in:
Lukas Wirth 2024-01-16 14:28:47 +01:00
parent 6584e63506
commit 384488c157
6 changed files with 377 additions and 25 deletions
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26
crates/syntax/src/ast/token_ext.rs
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@ -1,6 +1,9 @@
//! There are many AstNodes, but only a few tokens, so we hand-write them here.
use std::borrow::Cow;
use std::{
borrow::Cow,
num::{ParseFloatError, ParseIntError},
};
use rustc_lexer::unescape::{
unescape_byte, unescape_c_string, unescape_char, unescape_literal, CStrUnit, Mode,
@ -391,10 +394,9 @@ impl ast::IntNumber {
(prefix, text, suffix)
}
pub fn value(&self) -> Option<u128> {
pub fn value(&self) -> Result<u128, ParseIntError> {
let (_, text, _) = self.split_into_parts();
let value = u128::from_str_radix(&text.replace('_', ""), self.radix() as u32).ok()?;
Some(value)
u128::from_str_radix(&text.replace('_', ""), self.radix() as u32)
}
pub fn suffix(&self) -> Option<&str> {
@ -445,9 +447,14 @@ impl ast::FloatNumber {
}
}
pub fn value(&self) -> Option<f64> {
pub fn value(&self) -> Result<f64, ParseFloatError> {
let (text, _) = self.split_into_parts();
text.replace('_', "").parse::<f64>().ok()
text.replace('_', "").parse::<f64>()
}
pub fn value_f32(&self) -> Result<f32, ParseFloatError> {
let (text, _) = self.split_into_parts();
text.replace('_', "").parse::<f32>()
}
}
@ -484,12 +491,15 @@ mod tests {
}
fn check_float_value(lit: &str, expected: impl Into<Option<f64>> + Copy) {
assert_eq!(FloatNumber { syntax: make::tokens::literal(lit) }.value(), expected.into());
assert_eq!(
FloatNumber { syntax: make::tokens::literal(lit) }.value().ok(),
expected.into()
);
assert_eq!(IntNumber { syntax: make::tokens::literal(lit) }.float_value(), expected.into());
}
fn check_int_value(lit: &str, expected: impl Into<Option<u128>>) {
assert_eq!(IntNumber { syntax: make::tokens::literal(lit) }.value(), expected.into());
assert_eq!(IntNumber { syntax: make::tokens::literal(lit) }.value().ok(), expected.into());
}
#[test]