32 lines
584 B
BNF
32 lines
584 B
BNF
ROOT ::= EXPR*
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EXPR ::=
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| OR
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| ASSERT
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| VAR_DECL
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| CONST_DECL
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| ASSIGN
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| BLOCK
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BLOCK ::= begin EXPR* end
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ASSIGN ::= ident assign EXPR
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VAR_DECL ::= var ident assign EXPR
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CONST_DECL ::= const ident assign EXPR
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ASSERT ::= assert EXPR eq EXPR
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OR ::= AND (or AND)*
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AND ::= EQ (and EQ)*
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EQ ::= CMP ((equal|not_equal) CMP)?
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CMP ::= TERM ((lt|gt|le|ge) TERM)?
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TERM ::= FACTOR ((add|sub) FACTOR)*
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FACTOR ::= USUB ((mul|div|mod) USUB)*
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USUB ::= sub* NOT
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NOT ::= not* POW
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POW ::= LITERAL (pow LITERAL)?
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LITERAL ::=
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| BUILTIN
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| opar EXPR cpar
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| ident
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BUILTIN ::=
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| int
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| bool
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| float
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| string
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