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Merge pull request #1160 from AleoHQ/abnf
Add some comments to the ABNF grammar and re-generate the markdown
This commit is contained in:
Alessandro Coglio
GitHub
commit
235ff3eba7
@ -466,7 +466,7 @@ described above.
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newline = line-feed / carriage-return / carriage-return line-feed
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```
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Go to: _[line-feed](#user-content-line-feed), [carriage-return](#user-content-carriage-return)_;
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Go to: _[carriage-return](#user-content-carriage-return), [line-feed](#user-content-line-feed)_;
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Line terminators form whitespace, along with spaces and horizontal tabs.
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@ -476,7 +476,7 @@ Line terminators form whitespace, along with spaces and horizontal tabs.
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whitespace = space / horizontal-tab / newline
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```
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Go to: _[space](#user-content-space), [newline](#user-content-newline), [horizontal-tab](#user-content-horizontal-tab)_;
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Go to: _[newline](#user-content-newline), [space](#user-content-space), [horizontal-tab](#user-content-horizontal-tab)_;
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There are two kinds of comments in Leo, as in other languages.
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@ -494,7 +494,7 @@ the ones used in the Java language reference.
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comment = block-comment / end-of-line-comment
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```
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Go to: _[block-comment](#user-content-block-comment), [end-of-line-comment](#user-content-end-of-line-comment)_;
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Go to: _[end-of-line-comment](#user-content-end-of-line-comment), [block-comment](#user-content-block-comment)_;
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<a name="block-comment"></a>
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@ -511,7 +511,7 @@ rest-of-block-comment = "*" rest-of-block-comment-after-star
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/ not-star rest-of-block-comment
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```
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Go to: _[rest-of-block-comment](#user-content-rest-of-block-comment), [rest-of-block-comment-after-star](#user-content-rest-of-block-comment-after-star), [not-star](#user-content-not-star)_;
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Go to: _[not-star](#user-content-not-star), [rest-of-block-comment-after-star](#user-content-rest-of-block-comment-after-star), [rest-of-block-comment](#user-content-rest-of-block-comment)_;
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<a name="rest-of-block-comment-after-star"></a>
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@ -521,7 +521,7 @@ rest-of-block-comment-after-star = "/"
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/ not-star-or-slash rest-of-block-comment
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```
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Go to: _[rest-of-block-comment](#user-content-rest-of-block-comment), [rest-of-block-comment-after-star](#user-content-rest-of-block-comment-after-star), [not-star-or-slash](#user-content-not-star-or-slash)_;
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Go to: _[rest-of-block-comment](#user-content-rest-of-block-comment), [not-star-or-slash](#user-content-not-star-or-slash), [rest-of-block-comment-after-star](#user-content-rest-of-block-comment-after-star)_;
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<a name="end-of-line-comment"></a>
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@ -633,13 +633,22 @@ Go to: _[letter](#user-content-letter)_;
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A package name consists of one or more segments separated by single dashes,
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where each segment is a non-empty sequence of lowercase letters and digits.
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Similarly to an identifier, a package name must not be keyword
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and must not be or start with `aleo1`.
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<a name="package-name"></a>
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```abnf
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package-name = 1*( lowercase-letter / digit )
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package-name = lowercase-letter *( lowercase-letter / digit )
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*( "-" 1*( lowercase-letter / digit ) )
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; but not a keyword or aleo1...
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```
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Go to: _[lowercase-letter](#user-content-lowercase-letter)_;
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Note that, grammatically, identifiers are also package names.
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They are disambiguated from context, based on the syntactic grammar.
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Annotations have names, which are identifiers immediately preceded by `@`.
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<a name="annotation-name"></a>
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@ -753,7 +762,7 @@ and Unicode escapes with one to six hexadecimal digits
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character-literal = single-quote character-literal-element single-quote
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```
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Go to: _[single-quote](#user-content-single-quote), [character-literal-element](#user-content-character-literal-element)_;
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Go to: _[character-literal-element](#user-content-character-literal-element), [single-quote](#user-content-single-quote)_;
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<a name="character-literal-element"></a>
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@ -764,7 +773,7 @@ character-literal-element = not-single-quote-or-backslash
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/ unicode-character-escape
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```
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Go to: _[unicode-character-escape](#user-content-unicode-character-escape), [simple-character-escape](#user-content-simple-character-escape), [not-single-quote-or-backslash](#user-content-not-single-quote-or-backslash), [ascii-character-escape](#user-content-ascii-character-escape)_;
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Go to: _[ascii-character-escape](#user-content-ascii-character-escape), [unicode-character-escape](#user-content-unicode-character-escape), [simple-character-escape](#user-content-simple-character-escape), [not-single-quote-or-backslash](#user-content-not-single-quote-or-backslash)_;
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<a name="single-quote-escape"></a>
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@ -819,7 +828,7 @@ simple-character-escape = single-quote-escape
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/ null-character-escape
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```
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Go to: _[null-character-escape](#user-content-null-character-escape), [carriage-return-escape](#user-content-carriage-return-escape), [horizontal-tab-escape](#user-content-horizontal-tab-escape), [single-quote-escape](#user-content-single-quote-escape), [double-quote-escape](#user-content-double-quote-escape), [backslash-escape](#user-content-backslash-escape), [line-feed-escape](#user-content-line-feed-escape)_;
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Go to: _[line-feed-escape](#user-content-line-feed-escape), [carriage-return-escape](#user-content-carriage-return-escape), [single-quote-escape](#user-content-single-quote-escape), [double-quote-escape](#user-content-double-quote-escape), [horizontal-tab-escape](#user-content-horizontal-tab-escape), [null-character-escape](#user-content-null-character-escape), [backslash-escape](#user-content-backslash-escape)_;
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<a name="ascii-character-escape"></a>
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@ -827,7 +836,7 @@ Go to: _[null-character-escape](#user-content-null-character-escape), [carriage-
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ascii-character-escape = %s"\x" octal-digit hexadecimal-digit
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```
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Go to: _[octal-digit](#user-content-octal-digit), [hexadecimal-digit](#user-content-hexadecimal-digit)_;
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Go to: _[hexadecimal-digit](#user-content-hexadecimal-digit), [octal-digit](#user-content-octal-digit)_;
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<a name="unicode-character-escape"></a>
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@ -858,7 +867,7 @@ string-literal-element = not-double-quote-or-backslash
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/ unicode-character-escape
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```
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Go to: _[ascii-character-escape](#user-content-ascii-character-escape), [not-double-quote-or-backslash](#user-content-not-double-quote-or-backslash), [unicode-character-escape](#user-content-unicode-character-escape), [simple-character-escape](#user-content-simple-character-escape)_;
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Go to: _[not-double-quote-or-backslash](#user-content-not-double-quote-or-backslash), [ascii-character-escape](#user-content-ascii-character-escape), [simple-character-escape](#user-content-simple-character-escape), [unicode-character-escape](#user-content-unicode-character-escape)_;
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The ones above are all the atomic literals
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@ -878,7 +887,7 @@ atomic-literal = untyped-literal
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/ string-literal
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```
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Go to: _[product-group-literal](#user-content-product-group-literal), [field-literal](#user-content-field-literal), [untyped-literal](#user-content-untyped-literal), [boolean-literal](#user-content-boolean-literal), [address-literal](#user-content-address-literal), [unsigned-literal](#user-content-unsigned-literal), [character-literal](#user-content-character-literal), [signed-literal](#user-content-signed-literal), [string-literal](#user-content-string-literal)_;
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Go to: _[field-literal](#user-content-field-literal), [untyped-literal](#user-content-untyped-literal), [boolean-literal](#user-content-boolean-literal), [signed-literal](#user-content-signed-literal), [product-group-literal](#user-content-product-group-literal), [string-literal](#user-content-string-literal), [address-literal](#user-content-address-literal), [character-literal](#user-content-character-literal), [unsigned-literal](#user-content-unsigned-literal)_;
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After defining the (mostly) alphanumeric tokens above,
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@ -922,7 +931,7 @@ token = keyword
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/ symbol
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```
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Go to: _[symbol](#user-content-symbol), [identifier](#user-content-identifier), [package-name](#user-content-package-name), [keyword](#user-content-keyword), [atomic-literal](#user-content-atomic-literal), [annotation-name](#user-content-annotation-name)_;
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Go to: _[annotation-name](#user-content-annotation-name), [keyword](#user-content-keyword), [symbol](#user-content-symbol), [identifier](#user-content-identifier), [package-name](#user-content-package-name), [atomic-literal](#user-content-atomic-literal)_;
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@ -979,7 +988,7 @@ group-type = %s"group"
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arithmetic-type = integer-type / field-type / group-type
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```
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Go to: _[integer-type](#user-content-integer-type), [group-type](#user-content-group-type), [field-type](#user-content-field-type)_;
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Go to: _[integer-type](#user-content-integer-type), [field-type](#user-content-field-type), [group-type](#user-content-group-type)_;
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The arithmetic types, along with the boolean, address, and character types,
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@ -1005,7 +1014,7 @@ character-type = %s"char"
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scalar-type = boolean-type / arithmetic-type / address-type / character-type
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```
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Go to: _[arithmetic-type](#user-content-arithmetic-type), [boolean-type](#user-content-boolean-type), [character-type](#user-content-character-type), [address-type](#user-content-address-type)_;
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Go to: _[arithmetic-type](#user-content-arithmetic-type), [address-type](#user-content-address-type), [boolean-type](#user-content-boolean-type), [character-type](#user-content-character-type)_;
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Circuit types are denoted by identifiers and the keyword `Self`.
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@ -1022,7 +1031,7 @@ self-type = %s"Self"
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circuit-type = identifier / self-type
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```
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Go to: _[self-type](#user-content-self-type), [identifier](#user-content-identifier)_;
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Go to: _[identifier](#user-content-identifier), [self-type](#user-content-self-type)_;
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A tuple type consists of zero, two, or more component types.
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@ -1045,7 +1054,7 @@ or a tuple of one or more dimensions.
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array-type = "[" type ";" array-dimensions "]"
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```
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Go to: _[array-dimensions](#user-content-array-dimensions), [type](#user-content-type)_;
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Go to: _[type](#user-content-type), [array-dimensions](#user-content-array-dimensions)_;
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<a name="array-dimensions"></a>
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@ -1066,7 +1075,7 @@ i.e. types whose values contain (sub-)values
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aggregate-type = tuple-type / array-type / circuit-type
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```
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Go to: _[array-type](#user-content-array-type), [tuple-type](#user-content-tuple-type), [circuit-type](#user-content-circuit-type)_;
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Go to: _[tuple-type](#user-content-tuple-type), [circuit-type](#user-content-circuit-type), [array-type](#user-content-array-type)_;
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Scalar and aggregate types form all the types.
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@ -1076,7 +1085,7 @@ Scalar and aggregate types form all the types.
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type = scalar-type / aggregate-type
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```
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Go to: _[aggregate-type](#user-content-aggregate-type), [scalar-type](#user-content-scalar-type)_;
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Go to: _[scalar-type](#user-content-scalar-type), [aggregate-type](#user-content-aggregate-type)_;
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The lexical grammar given earlier defines product group literals.
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@ -1112,7 +1121,7 @@ A literal is either an atomic one or an affine group literal.
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literal = atomic-literal / affine-group-literal
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```
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Go to: _[atomic-literal](#user-content-atomic-literal), [affine-group-literal](#user-content-affine-group-literal)_;
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Go to: _[affine-group-literal](#user-content-affine-group-literal), [atomic-literal](#user-content-atomic-literal)_;
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The following rule is not directly referenced in the rules for expressions
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@ -1125,7 +1134,7 @@ a group literal is either a product group literal or an affine group literal.
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group-literal = product-group-literal / affine-group-literal
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```
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Go to: _[product-group-literal](#user-content-product-group-literal), [affine-group-literal](#user-content-affine-group-literal)_;
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Go to: _[affine-group-literal](#user-content-affine-group-literal), [product-group-literal](#user-content-product-group-literal)_;
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As often done in grammatical language syntax specifications,
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@ -1154,7 +1163,7 @@ primary-expression = identifier
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/ circuit-expression
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```
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Go to: _[literal](#user-content-literal), [identifier](#user-content-identifier), [tuple-expression](#user-content-tuple-expression), [array-expression](#user-content-array-expression), [circuit-expression](#user-content-circuit-expression), [expression](#user-content-expression)_;
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Go to: _[literal](#user-content-literal), [array-expression](#user-content-array-expression), [identifier](#user-content-identifier), [circuit-expression](#user-content-circuit-expression), [expression](#user-content-expression), [tuple-expression](#user-content-tuple-expression)_;
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Tuple expressions construct tuples.
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@ -1215,7 +1224,7 @@ Go to: _[array-dimensions](#user-content-array-dimensions), [expression](#user-c
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array-construction = array-inline-construction / array-repeat-construction
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```
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Go to: _[array-inline-construction](#user-content-array-inline-construction), [array-repeat-construction](#user-content-array-repeat-construction)_;
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Go to: _[array-repeat-construction](#user-content-array-repeat-construction), [array-inline-construction](#user-content-array-inline-construction)_;
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<a name="array-expression"></a>
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@ -1243,7 +1252,7 @@ circuit-construction = circuit-type "{"
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"}"
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```
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Go to: _[circuit-inline-element](#user-content-circuit-inline-element), [circuit-type](#user-content-circuit-type)_;
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Go to: _[circuit-type](#user-content-circuit-type), [circuit-inline-element](#user-content-circuit-inline-element)_;
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<a name="circuit-inline-element"></a>
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@ -1251,7 +1260,7 @@ Go to: _[circuit-inline-element](#user-content-circuit-inline-element), [circuit
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circuit-inline-element = identifier ":" expression / identifier
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```
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Go to: _[identifier](#user-content-identifier), [expression](#user-content-expression)_;
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Go to: _[expression](#user-content-expression), [identifier](#user-content-identifier)_;
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<a name="circuit-expression"></a>
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@ -1302,7 +1311,7 @@ postfix-expression = primary-expression
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/ postfix-expression "[" [expression] ".." [expression] "]"
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```
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Go to: _[postfix-expression](#user-content-postfix-expression), [expression](#user-content-expression), [identifier](#user-content-identifier), [primary-expression](#user-content-primary-expression), [function-arguments](#user-content-function-arguments), [circuit-type](#user-content-circuit-type), [natural](#user-content-natural)_;
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Go to: _[postfix-expression](#user-content-postfix-expression), [expression](#user-content-expression), [circuit-type](#user-content-circuit-type), [function-arguments](#user-content-function-arguments), [identifier](#user-content-identifier), [natural](#user-content-natural), [primary-expression](#user-content-primary-expression)_;
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Unary operators have the highest operator precedence.
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@ -1330,7 +1339,7 @@ exponential-expression = unary-expression
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/ unary-expression "**" exponential-expression
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```
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Go to: _[unary-expression](#user-content-unary-expression), [exponential-expression](#user-content-exponential-expression)_;
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Go to: _[exponential-expression](#user-content-exponential-expression), [unary-expression](#user-content-unary-expression)_;
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Next in precedence come multiplication and division, both left-associative.
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@ -1378,11 +1387,11 @@ the rule below makes them left-associative.
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<a name="equality-expression"></a>
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```abnf
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equality-expression = ordering-expression
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/ equality-expression "==" ordering-expression
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/ equality-expression "!=" ordering-expression
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/ ordering-expression "==" ordering-expression
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/ ordering-expression "!=" ordering-expression
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```
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Go to: _[equality-expression](#user-content-equality-expression), [ordering-expression](#user-content-ordering-expression)_;
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Go to: _[ordering-expression](#user-content-ordering-expression)_;
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Next come conjunctive expressions, left-associative.
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@ -1393,7 +1402,7 @@ conjunctive-expression = equality-expression
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/ conjunctive-expression "&&" equality-expression
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```
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Go to: _[conjunctive-expression](#user-content-conjunctive-expression), [equality-expression](#user-content-equality-expression)_;
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Go to: _[equality-expression](#user-content-equality-expression), [conjunctive-expression](#user-content-conjunctive-expression)_;
|
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Next come disjunctive expressions, left-associative.
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@ -1404,7 +1413,7 @@ disjunctive-expression = conjunctive-expression
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/ disjunctive-expression "||" conjunctive-expression
|
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```
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Go to: _[disjunctive-expression](#user-content-disjunctive-expression), [conjunctive-expression](#user-content-conjunctive-expression)_;
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Go to: _[conjunctive-expression](#user-content-conjunctive-expression), [disjunctive-expression](#user-content-disjunctive-expression)_;
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Finally we have conditional expressions.
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@ -1417,7 +1426,7 @@ conditional-expression = disjunctive-expression
|
||||
":" conditional-expression
|
||||
```
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Go to: _[disjunctive-expression](#user-content-disjunctive-expression), [conditional-expression](#user-content-conditional-expression), [expression](#user-content-expression)_;
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Go to: _[conditional-expression](#user-content-conditional-expression), [disjunctive-expression](#user-content-disjunctive-expression), [expression](#user-content-expression)_;
|
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Those above are all the expressions.
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@ -1450,7 +1459,7 @@ statement = expression-statement
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/ block
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||||
```
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Go to: _[constant-declaration](#user-content-constant-declaration), [variable-declaration](#user-content-variable-declaration), [conditional-statement](#user-content-conditional-statement), [loop-statement](#user-content-loop-statement), [block](#user-content-block), [assignment-statement](#user-content-assignment-statement), [console-statement](#user-content-console-statement), [expression-statement](#user-content-expression-statement), [return-statement](#user-content-return-statement)_;
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Go to: _[console-statement](#user-content-console-statement), [constant-declaration](#user-content-constant-declaration), [expression-statement](#user-content-expression-statement), [variable-declaration](#user-content-variable-declaration), [conditional-statement](#user-content-conditional-statement), [loop-statement](#user-content-loop-statement), [return-statement](#user-content-return-statement), [assignment-statement](#user-content-assignment-statement), [block](#user-content-block)_;
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<a name="block"></a>
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@ -1493,7 +1502,7 @@ variable-declaration = %s"let" identifier-or-identifiers [ ":" type ]
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"=" expression ";"
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```
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Go to: _[identifier-or-identifiers](#user-content-identifier-or-identifiers), [type](#user-content-type), [expression](#user-content-expression)_;
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Go to: _[expression](#user-content-expression), [type](#user-content-type), [identifier-or-identifiers](#user-content-identifier-or-identifiers)_;
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<a name="constant-declaration"></a>
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@ -1525,7 +1534,7 @@ Note that blocks are required in all branches, not merely statements.
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branch = %s"if" expression block
|
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```
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Go to: _[expression](#user-content-expression), [block](#user-content-block)_;
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||||
Go to: _[block](#user-content-block), [expression](#user-content-expression)_;
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|
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<a name="conditional-statement"></a>
|
||||
@ -1535,7 +1544,7 @@ conditional-statement = branch
|
||||
/ branch %s"else" conditional-statement
|
||||
```
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|
||||
Go to: _[conditional-statement](#user-content-conditional-statement), [branch](#user-content-branch), [block](#user-content-block)_;
|
||||
Go to: _[block](#user-content-block), [branch](#user-content-branch), [conditional-statement](#user-content-conditional-statement)_;
|
||||
|
||||
|
||||
A loop statement implicitly defines a loop variable
|
||||
@ -1547,7 +1556,7 @@ The body is a block.
|
||||
loop-statement = %s"for" identifier %s"in" expression ".." expression block
|
||||
```
|
||||
|
||||
Go to: _[expression](#user-content-expression), [identifier](#user-content-identifier), [block](#user-content-block)_;
|
||||
Go to: _[block](#user-content-block), [identifier](#user-content-identifier), [expression](#user-content-expression)_;
|
||||
|
||||
|
||||
An assignment statement is straightforward.
|
||||
@ -1591,7 +1600,7 @@ console-call = assert-call
|
||||
/ print-call
|
||||
```
|
||||
|
||||
Go to: _[assert-call](#user-content-assert-call), [print-call](#user-content-print-call)_;
|
||||
Go to: _[print-call](#user-content-print-call), [assert-call](#user-content-assert-call)_;
|
||||
|
||||
|
||||
<a name="assert-call"></a>
|
||||
@ -1609,7 +1618,7 @@ print-function = %s"debug" / %s"error" / %s"log"
|
||||
|
||||
<a name="print-arguments"></a>
|
||||
```abnf
|
||||
print-arguments = "(" [ string-literal *( "," expression ) ] ")"
|
||||
print-arguments = "(" string-literal *( "," expression ) ")"
|
||||
```
|
||||
|
||||
Go to: _[string-literal](#user-content-string-literal)_;
|
||||
@ -1650,7 +1659,7 @@ function-declaration = *annotation %s"function" identifier
|
||||
block
|
||||
```
|
||||
|
||||
Go to: _[function-parameters](#user-content-function-parameters), [type](#user-content-type), [block](#user-content-block), [identifier](#user-content-identifier)_;
|
||||
Go to: _[identifier](#user-content-identifier), [block](#user-content-block), [function-parameters](#user-content-function-parameters), [type](#user-content-type)_;
|
||||
|
||||
|
||||
<a name="function-parameters"></a>
|
||||
@ -1660,7 +1669,7 @@ function-parameters = self-parameter
|
||||
/ function-inputs
|
||||
```
|
||||
|
||||
Go to: _[self-parameter](#user-content-self-parameter), [function-inputs](#user-content-function-inputs)_;
|
||||
Go to: _[function-inputs](#user-content-function-inputs), [self-parameter](#user-content-self-parameter)_;
|
||||
|
||||
|
||||
<a name="self-parameter"></a>
|
||||
@ -1724,7 +1733,7 @@ allowing member variables and member functions to be intermixed.
|
||||
|
||||
<a name="circuit-declaration"></a>
|
||||
```abnf
|
||||
circuit-declaration = *annotation %s"circuit" identifier
|
||||
circuit-declaration = %s"circuit" identifier
|
||||
"{" [ member-variable-declarations ]
|
||||
*member-function-declaration "}"
|
||||
```
|
||||
@ -1777,7 +1786,7 @@ declaration = import-declaration
|
||||
/ constant-declaration
|
||||
```
|
||||
|
||||
Go to: _[circuit-declaration](#user-content-circuit-declaration), [constant-declaration](#user-content-constant-declaration), [function-declaration](#user-content-function-declaration), [import-declaration](#user-content-import-declaration)_;
|
||||
Go to: _[import-declaration](#user-content-import-declaration), [function-declaration](#user-content-function-declaration), [circuit-declaration](#user-content-circuit-declaration), [constant-declaration](#user-content-constant-declaration)_;
|
||||
|
||||
|
||||
<a name="file"></a>
|
||||
|
||||
@ -452,9 +452,15 @@ identifier = letter *( letter / digit / "_" ) ; but not a keyword 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.
|
||||
; Similarly to an identifier, a package name must not be keyword
|
||||
; and must not be or start with `aleo1`.
|
||||
|
||||
package-name = lowercase-letter *( lowercase-letter / digit )
|
||||
*( "-" 1*( lowercase-letter / digit ) )
|
||||
; but not a keyword or aleo1...
|
||||
|
||||
; Note that, grammatically, identifiers are also package names.
|
||||
; They are disambiguated from context, based on the syntactic grammar.
|
||||
|
||||
; Annotations have names, which are identifiers immediately preceded by `@`.
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user