[rudycelekli]

Why

scan_quantity reads a currency symbol at the very start of the text, then the number with its sign. A loss or a negative balance is usually written with the minus in front of the symbol: "-$5 million", "−€30 million", "-$1,250". There the first character is -, so no currency is found, the number scan stops at $, and the value is not read at all. The same figure written "$-5 million" reads as -5000000.

So a net loss stated as "-$5 million" under a number attribute stays out of the typed graph, and literal_object does not see it as a value either.

What changes

If the text starts with - or the typeset − and the next character is a currency symbol, the sign is set aside, the currency is read as before, and the sign goes back on the number before it is parsed (so a magnitude word still scales the signed value). A dash that is not followed by a currency symbol is left alone, so "- 5" is still not a number, and a double sign ("-$-5") is still no value.

How it was checked

• A new test, a_minus_sign_before_the_currency_is_read_as_negative, covers "-$5 million", "−€30 million", "-$1,250", "-£0.5", "-¥2.3亿" under 万元, "- 5" and "-$-5".
• With the fix reverted the test fails: left: None right: Some(Number(-5000000.0)).
• cargo test -p utopia-extract --lib: 113 passed.
• cargo fmt -p utopia-extract --check and cargo clippy -p utopia-extract --all-targets -- -D warnings pass.

Before review

• Every commit is signed off (git commit -s)
• cargo fmt --all --check, cargo clippy and cargo test pass for the touched crate