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imported>rabierre No edit summary |
imported>rabierre No edit summary |
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| Value | | Value | ||
Value ::= Integer | Double | Value ::= Integer | Double | ||
s : synthesis | |||
i : inherit | |||
< Synthesis, Inherit > | < Synthesis, Inherit > | ||
Expr ::= Term | Expr ::= Term | ||
Revision as of 10:37, 25 May 2014
< EBNF >
Expr ::= Term([+|-] Expr)?
Term ::= Factor ([*|/] Term)?
Factor :: = (Expr)
| Value
Value ::= Integer | Double
s : synthesis
i : inherit
< Synthesis, Inherit >
Expr ::= Term
(s) expr.isDouble = term.isDouble
(i) term.type = if expr.isDouble then double else int
Expr1 ::= Term [+-] Expr2
(s) expr1.isDouble = term.isDouble or expr2.isDouble
(i) term.type = expr1.isDouble then double else int
(i) expr2.type = expr1.isDouble then double else int
Factor ::= (Expr)
(s) factor.isDouble = expr.isDouble
(i) expr.type = factor.isDouble then double else int
Factor ::= Value
(s) factor.isDouble = value.isDouble
(i) value.type = factor.isDouble then double else int
Value :: Decimal Integer
(s) value.isDouble = false
(i) value.type = value.type == double then double else int
Value :: Double
(s) value.isDouble = true
(i) value.type = value.type == double then double else int