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Allow floating point numbers ending in a period.

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Stephen Chung
2020-11-23 22:51:21 +08:00
parent 36aa827e15
commit 86009c70c8
3 changed files with 31 additions and 12 deletions
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19
doc/src/language/numbers.md
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@@ -8,14 +8,15 @@ Integer numbers follow C-style format with support for decimal, binary ('`0b`'),
The default system integer type (also aliased to `INT`) is `i64`. It can be turned into `i32` via the [`only_i32`] feature.
Floating-point numbers are also supported if not disabled with [`no_float`]. The default system floating-point type is `i64`
(also aliased to `FLOAT`).
(also aliased to `FLOAT`). It can be turned into `f32` via the [`f32_float`] feature.
'`_`' separators can be added freely and are ignored within a number.
'`_`' separators can be added freely and are ignored within a number - except at the very beginning or right after
a decimal point ('`.`').
| Format | Type |
| ---------------- | ---------------- |
| `123_345`, `-42` | `i64` in decimal |
| `0o07_76` | `i64` in octal |
| `0xabcd_ef` | `i64` in hex |
| `0b0101_1001` | `i64` in binary |
| `123_456.789` | `f64` |
| Format | Type |
| --------------------- | ---------------- |
| `123_345`, `-42` | `INT` in decimal |
| `0o07_76` | `INT` in octal |
| `0xabcd_ef` | `INT` in hex |
| `0b0101_1001` | `INT` in binary |
| `123_456.789`, `-42.` | `FLOAT` |