| expr.rs |
Evaluating C expressions from tokens.
Numerical operators are supported. All numerical values are treated as
`i64` or `f64`. Type casting is not supported. `i64` are converted to
`f64` when used in conjunction with a `f64`. Right shifts are always
arithmetic shifts.
The `sizeof` operator is not supported.
String concatenation is supported, but width prefixes are ignored; all
strings are treated as narrow strings.
Use the `IdentifierParser` to substitute identifiers found in expressions. |
20275 |
| lib.rs |
A C expression parser and evaluator.
This crate provides methods for parsing and evaluating simple C expressions. In general, the
crate can handle most arithmetic expressions that would appear in macros or the definition of
constants, as well as string and character constants.
The main entry point for is [`token::parse`], which parses a byte string and returns its
evaluated value. |
4487 |
| literal.rs |
Parsing C literals from byte slices.
This will parse a representation of a C literal into a Rust type.
# characters
Character literals are stored into the `CChar` type, which can hold values
that are not valid Unicode code points. ASCII characters are represented as
`char`, literal bytes with the high byte set are converted into the raw
representation. Escape sequences are supported. If hex and octal escapes
map to an ASCII character, that is used, otherwise, the raw encoding is
used, including for values over 255. Unicode escapes are checked for
validity and mapped to `char`. Character sequences are not supported. Width
prefixes are ignored.
# strings
Strings are interpreted as byte vectors. Escape sequences are supported. If
hex and octal escapes map onto multi-byte characters, they are truncated to
one 8-bit character. Unicode escapes are converted into their UTF-8
encoding. Width prefixes are ignored.
# integers
Integers are read into `i64`. Binary, octal, decimal and hexadecimal are
all supported. If the literal value is between `i64::MAX` and `u64::MAX`,
it is bit-cast to `i64`. Values over `u64::MAX` cannot be parsed. Width and
sign suffixes are ignored. Sign prefixes are not supported.
# real numbers
Reals are read into `f64`. Width suffixes are ignored. Sign prefixes are
not supported in the significand. Hexadecimal floating points are not
supported. |
11191 |
| token.rs |
Representation of a C token
This is designed to map onto a libclang CXToken. |
1185 |