c5ca49678f
1077: Improve parsing of type bounds r=matklad a=vipentti
This adds new TYPE_BOUND_LIST and TYPE_BOUND syntax kinds. These are now used when parsing type bounds. In addition parsing paths inside a bound now does not recursively parse paths, rather they are treated as separate bounds, separated by +.
Basically now the generic params `struct S<T: 'a + ?Sized + (Copy)>;` in will be parsed as
```
TYPE_PARAM_LIST@[8; 33)
L_ANGLE@[8; 9)
TYPE_PARAM@[9; 32)
NAME@[9; 10)
IDENT@[9; 10) "T"
COLON@[10; 11)
WHITESPACE@[11; 12)
TYPE_BOUND_LIST@[12; 32)
TYPE_BOUND@[12; 14)
LIFETIME@[12; 14) "'a"
WHITESPACE@[14; 15)
PLUS@[15; 16)
WHITESPACE@[16; 17)
TYPE_BOUND@[17; 23)
QUESTION@[17; 18)
PATH_TYPE@[18; 23)
PATH@[18; 23)
PATH_SEGMENT@[18; 23)
NAME_REF@[18; 23)
IDENT@[18; 23) "Sized"
WHITESPACE@[23; 24)
PLUS@[24; 25)
WHITESPACE@[25; 26)
TYPE_BOUND@[26; 32)
L_PAREN@[26; 27)
PATH_TYPE@[27; 31)
PATH@[27; 31)
PATH_SEGMENT@[27; 31)
NAME_REF@[27; 31)
IDENT@[27; 31) "Copy"
R_PAREN@[31; 32)
R_ANGLE@[32; 33)
```
Previously it was parsed, with the paths nested:
```
TYPE_PARAM_LIST@[8; 33)
L_ANGLE@[8; 9)
TYPE_PARAM@[9; 32)
NAME@[9; 10)
IDENT@[9; 10) "T"
COLON@[10; 11)
WHITESPACE@[11; 12)
LIFETIME@[12; 14) "'a"
WHITESPACE@[14; 15)
PLUS@[15; 16)
WHITESPACE@[16; 17)
QUESTION@[17; 18)
PATH_TYPE@[18; 32)
PATH@[18; 23)
PATH_SEGMENT@[18; 23)
NAME_REF@[18; 23)
IDENT@[18; 23) "Sized"
WHITESPACE@[23; 24)
PLUS@[24; 25)
WHITESPACE@[25; 26)
L_PAREN@[26; 27)
PATH_TYPE@[27; 31)
PATH@[27; 31)
PATH_SEGMENT@[27; 31)
NAME_REF@[27; 31)
IDENT@[27; 31) "Copy"
R_PAREN@[31; 32)
R_ANGLE@[32; 33)
```
Looking for feedback.
Co-authored-by: Ville Penttinen <villem.penttinen@gmail.com>
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| Cargo.lock | ||
| Cargo.toml | ||
| LICENSE-APACHE | ||
| LICENSE-MIT | ||
| README.md | ||
| rustfmt.toml | ||
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