Module cexpr::literal

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.

Enums

CChar

Representation of a C character

Functions

parse

Parse a C literal.