79 lines
3.3 KiB
EBNF
79 lines
3.3 KiB
EBNF
(* Core Character Sequences *)
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white_space ::= '\u0020' | '\u0009' | '\u000D' | '\u000A'
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paren ::= '(' | ')';
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bracket ::= '[' | ']';
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brace ::= '{' | '}';
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digit ::= '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9';
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hex ::= '0' | ... | '9' | 'A' | ... | 'F' | 'a' | ... | 'f' ;
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upper ::= 'A' | ... | 'Z' | Lu | Lt | Nl
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| Lo upper only
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| Lm upper only;
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lower ::= 'a' | ... | 'z' | Ll
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| Lo lower only
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| Lm lower only;
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letter ::= upper | lower;
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escape_unicode ::= '\', 'u', hex, hex, hex, hex;
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escape_char ::= '\', ('b' | 'f' | 'n' | 'r' | 't' | '\' | '"');
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escape_seq ::= escape_unicode | escape_char;
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number_integer ::= '0' | digit, [{digit}];
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number_float ::= number_integer, '.', number_integer;
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newline ::= '\n';
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printable_char ::= printable utf8;
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char_char ::= printable_char without newline or single quote
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| escape_seq;
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string_char ::= printable_char without newline or double quote
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| escape_seq;
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(* Comments *)
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comment ::= '-', '-', {utf8};
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docstring ::= '-', '-', '-', {utf8};
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(* Literal Values *)
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literal_bool ::= 'true' | 'false';
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literal_integer ::= ['-'], number_integer;
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literal_float ::= ['-'], number_float;
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literal_char ::= "'", char_char, "'";
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literal_string ::= '"', {string_char}, "'";
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empty_tuple ::= '(', ')';
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literal ::= literal_bool
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| literal_integer
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| literal_float
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| literal_char
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| literal_string
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| empty_tuple;
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(* Keywords *)
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k_type ::= 't', 'y', 'p', 'e';
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k_class ::= 'c', 'l', 'a', 's', 's';
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k_alias ::= 'a', 'l', 'i', 'a', 's';
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k_const ::= 'c', 'o', 'n', 's', 't';
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k_enum ::= 'e', 'n', 'u', 'm';
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k_record ::= 'r', 'e', 'c', 'o', 'r', 'd';
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k_object ::= 'o', 'b', 'j', 'e', 'c', 't';
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k_let ::= 'l', 'e', 't';
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k_mut ::= 'm', 'u', 't';
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k_export ::= 'e', 'x', 'p', 'o', 'r', 't';
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k_import ::= 'i', 'm', 'p', 'o', 'r', 't';
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k_namespace ::= 'n', 'a', 'm', 'e', 's', 'p', 'a', 'c', 'e';
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k_infix ::= 'i', 'n', 'f', 'i', 'x';
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k_fn ::= 'f', 'n';
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k_end ::= 'e', 'n', 'd';
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k_match ::= 'm', 'a', 't', 'c', 'h';
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k_case ::= 'c', 'a', 's', 'e';
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k_if ::= 'i', 'f';
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k_then ::= 't', 'h', 'e', 'n';
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k_else ::= 'e', 'l', 's', 'e';
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k_do ::= 'd', 'o';
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k_return ::= 'r', 'e', 't', 'u', 'r', 'n';
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k_given ::= 'g', 'i', 'v', 'e', 'n';
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k_true ::= 't', 'r', 'u', 'e';
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k_false ::= 'f', 'a', 'l', 's', 'e';
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keyword ::= k_type | k_class | k_alias | k_const | k_enum | k_record
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| k_object | k_let | k_mut | k_export | k_import
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| k_namespace | k_infix | k_fn | k_end | k_match | k_case
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| k_if | k_then | k_else | k_do | k_return | k_given
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| k_true | k_false;
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