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[ABNF] Rename digit => decimal-digit.

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Since, with the introduction of (ASCII and Unicode escapes for) characters, we
now have digits in base 10, 8, and 16, it seems worth being more explicit in the
naming of decimal digits in the grammar.

Just a nonterminal name change, not a structural change to the grammar.
This commit is contained in:
Alessandro Coglio 2021-08-02 17:59:13 -07:00
parent 14f0163d2c
commit 33831779c7
1 changed files with 13 additions and 11 deletions
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24
grammar/abnf-grammar.txt
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@ -432,29 +432,31 @@ letter = uppercase-letter / lowercase-letter
; The following rules defines (ASCII) decimal, octal, and hexadecimal digits.
; Note that the latter are case-insensitive.
digit = %x30-39 ; 0-9
decimal-digit = %x30-39 ; 0-9
octal-digit = %x30-37 ; 0-7
hexadecimal-digit = digit / "a" / "b" / "c" / "d" / "e" / "f"
hexadecimal-digit = decimal-digit / "a" / "b" / "c" / "d" / "e" / "f"
; An identifier is a non-empty sequence of letters, digits, and underscores,
; An identifier is a non-empty sequence of
; letters, (decimal) digits, and underscores,
; starting with a letter.
; It must not be a keyword: this is an extra-grammatical requirement.
; It must also not be or start with `aleo1`,
; because that is used for address literals:
; this is another extra-grammatical requirement.
identifier = letter *( letter / digit / "_" )
identifier = letter *( letter / decimal-digit / "_" )
; but not a keyword or a boolean literal or aleo1...
; A package name consists of one or more segments separated by single dashes,
; where each segment is a non-empty sequence of lowercase letters and digits.
; where each segment is a non-empty sequence of
; lowercase letters and (decimal) digits.
; Similarly to an identifier, a package name must not be a keyword
; and must not be or start with `aleo1`.
package-name = lowercase-letter *( lowercase-letter / digit )
*( "-" 1*( lowercase-letter / digit ) )
package-name = lowercase-letter *( lowercase-letter / decimal-digit )
*( "-" 1*( lowercase-letter / decimal-digit ) )
; but not a keyword or a boolean literal or aleo1...
; Note that, grammatically, identifiers are also package names.
@ -464,10 +466,10 @@ package-name = lowercase-letter *( lowercase-letter / digit )
annotation-name = "@" identifier
; A natural (number) is a sequence of one or more digits.
; A natural (number) is a sequence of one or more decimal digits.
; We allow leading zeros, e.g. `007`.
natural = 1*digit
natural = 1*decimal-digit
; An integer (number) is either a natural or its negation.
; We allow leading zeros also in negative numbers, e.g. `-007`.
@ -503,10 +505,10 @@ product-group-literal = integer %s"group"
boolean-literal = %s"true" / %s"false"
; An address literal starts with `aleo1`
; and continues with exactly 58 lowercase letters and digits.
; and continues with exactly 58 lowercase letters and (decimal) digits.
; Thus an address always consists of 63 characters.
address-literal = %s"aleo1" 58( lowercase-letter / digit )
address-literal = %s"aleo1" 58( lowercase-letter / decimal-digit )
; A character literal consists of an element surrounded by single quotes.
; The element is any character other than single quote or backslash,