Appendix C: Common Syntax Elements

export‑module‑declaration → export module module‑name ;
imports → import*
import → import‑prefix? import module‑name
import‑prefix → interface‑prefix | implementation‑prefix
interface‑prefix → [ interface ]
implementation‑prefix → [ implementation ]
module‑name → qualified‑id
file‑path → <[^\n>]*>
qualified‑id → identifier (. identifier)*
identifier → Unicode identifier
string‑literal → " (schar | escape)* "
schar → [^\"\\\n\r]
char‑literal → ' (cchar | escape)+ '
cchar → [^'\\\n\r]
escape → \
( (x|X) hex‑digit+ |
(d|D) digit+ |
octal‑digit+ |
uhex4 |
Uhex8 |
(a|b|f|n|r|t|v|.))
integer‑literal → octal‑literal | decimal‑literal | hex‑literal
floating‑literal → fraction exponent? | digit+ exponent
fraction → digit* . digit+ | digit+ .
exponent → (e | E) sign? digit+
sign → + | -
decimal‑literal → [1-9] digit*
digit‑sequence → digit+
digit → [0-9]
hex‑literal → (0x|0X) hex‑digit+
hex8 → hex4 hex4
hex4 → hex‑digit hex‑digit hex‑digit hex‑digit
hex‑digit → [0-9a-fA-F]
octal‑literal → 0 octal‑digit*
octal‑digit → [0-7]