mirror of
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6f0d801375
* Added mgiannini/sublime-factor as a submodule Provided better color for Fantom Added license for sublime-fantom Specified tm_scope for Fantom * Redirected submodule for Fantom to fork with updated grammar * Triggering build * Updating sublime-fantom submodule * Updated submodule sublime-fantom * Adding Fantom samples
51 lines
693 B
Plaintext
51 lines
693 B
Plaintext
/*
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* Author: Robert Koeninger
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* License: WTFPL (http://www.wtfpl.net/)
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*/
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mixin Expr
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{
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abstract Obj? eval()
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}
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class Constant : Expr
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{
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Obj? value
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new make(Obj? value) { this.value = value }
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override Obj? eval() { value }
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}
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enum class Op
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{
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plus,
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minus
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}
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class Infix : Expr
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{
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Op op
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Expr left
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Expr right
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new make(Op op, Expr left, Expr right)
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{
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this.op = op
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this.left = left
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this.right = right
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}
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override Obj? eval()
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{
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switch (op)
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{
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case Op.plus:
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return (Int)left.eval() + (Int)right.eval()
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case Op.minus:
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return (Int)left.eval() - (Int)right.eval()
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default:
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throw Err("undefined Op")
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}
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}
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}
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