mirror of
https://github.com/ValKmjolnir/Nasal-Interpreter.git
synced 2026-07-24 03:48:46 +08:00
Valk Richard Li
39 lines
1.3 KiB
BNF
39 lines
1.3 KiB
BNF
# <> must choose
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# [] can choose
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# {} can repeat 0 to infinite time(s)
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# | or
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# ::= is defined as
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<number> ::= <token_type_number>
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<string> ::= <token_type_string>
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<id> ::= <token_type_identifier>
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<dynamic_id> ::= <token_type_dynamic_id>
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<vector> ::= <[> { <scalar> <,> } <]>
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<hash> ::= <{> { ( <id> ) | ( <string> ) <:> <scalar> <,> } <}>
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<function> ::=<func> [ <(> { ( <id> [ <=> <scalar> ] ) | ( <dynamic_id> ) <,> } <)> ] ( <statement> ) | ( <{> { <statement> <;> } <}> )
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<calculation> ::=
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<definition> ::=
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<var> <id> <=> <scalar>
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| <var> <(> <id> { <,> <id> } <)> <=> <scalar>
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| <(> <var> <id> { <,> <id> } <) <=> <scalar>
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<assignment> ::=
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<if-else> ::=
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<if> <(> <scalar> <)> ( <statement> ) | ( <{> { <statement> <;> } <}> )
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{ ( <elsif> ) | ( <else> <if> ) } <(> <scalar> <)> ( <statement> ) | ( <{> { <statement> <;> } <}> )
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[<else> ( <statement> ) | ( <{> { <statement> <;> } <}> )
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<loop> ::=
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<for> <(> <;> <;> <)> ( <statement> ) | ( <{> { <statement> <;> } <}> )
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| <foreach> <(> <;> <)> ( <statement> ) | ( <{> { <statement> <;> } <}> )
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| <forindex> <(> <;> <)> ( <statement> ) | ( <{> { <statement> <;> } <}> )
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| <while> <(> <scalar> <)> ( <statement> ) | ( <{> { <statement> <;> } <}> )
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<statement> ::=
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<definition>
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| <assignment>
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| <if-else>
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| <loop>
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| <scalar> |