Wolfram Language Paclet Repository
Community-contributed installable additions to the Wolfram Language
Wolfram`Parser`
BinaryNode  |
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BinaryNode
CodeParser
sown
`BinaryNode
▪
op stays a language-native descriptor string (, ) rather than a Wolfram symbol, so one node serves arithmetic operators and a JSON pairing alike.
"+"
":"
key:value
▪
The child list always has exactly two elements. A left- or right-associative chain of the same operator nests as inside , rather than flattening into a single .
BinaryNode
BinaryNode
▪
builds a for each of , with the operator table giving right associativity and the rest left. uses keyvalue for each object member.
BinaryNode
+
-
*
/
^
^
BinaryNode[":",{
,
}]
▪
The zoo grammars use (nested) where a flattening grammar might use . meta holds a position when the node comes from a real parse, and is an empty when you build the node by hand.
BinaryNode
"Source"
Examples
(3)
Basic Examples
(1)
A binary node built literally holds its operator and two-element child list:
In[1]:=
 | BinaryNode |
 | LeafNode |
| LeafNode |
Out[1]=
BinaryNode[+,{LeafNode[Integer,1,],LeafNode[Integer,2,]},]
An arithmetic sum parses to a :
BinaryNode["+",…]
In[2]:=
| CalculatorAST |
Out[2]=
ContainerNode[String,{BinaryNode[+,{LeafNode[Integer,1,Source{{1,1},{1,2}}],LeafNode[Integer,2,Source{{1,3},{1,4}}]},Source{{1,1},{1,4}}]},Source{{1,1},{1,4}}]
Each JSON object member is a pairing the key leaf with the value:
BinaryNode[":",…]
In[3]:=
| JSONAST |
Out[3]=
ContainerNode[String,{GroupNode[Object,{BinaryNode[:,{LeafNode[String,"k",Source{{1,2},{1,5}}],LeafNode[Integer,1,Source{{1,7},{1,8}}]},Source{{1,2},{1,8}}]},Source{{1,2},{1,8}}]},Source{{1,2},{1,8}}]
Scope
(1)
Properties & Relations
(1)
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""