Wolfram Language Paclet Repository
Community-contributed installable additions to the Wolfram Language
Wolfram`Parser`
CallNode  |
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CallNode
CodeParser
sown
`CallNode
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Unlike the operator nodes, the head of a is a full node, not an operator descriptor string. This makes it the right shape for prefix-application languages where the operator position holds an arbitrary expression.
CallNode
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args is always a list, even for a single argument.
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The calculator and JSON grammars build operator nodes (, , ) instead of . meta holds a position when the call comes from a real parse, and is an empty when you build the node by hand.
CallNode
"Source"
Examples
(2)
Basic Examples
(1)
A call built literally holds its head and argument list:
In[1]:=
 | CallNode |
 | LeafNode |
 | LeafNode |
Out[1]=
CallNode[LeafNode[Symbol,f,],{LeafNode[Symbol,x,]},]
A Lisp s-expression reads head-first into a :
CallNode
In[2]:=
| LispAST |
Out[2]=
ContainerNode[String,{CallNode[LeafNode[Symbol,f,Source{{1,2},{1,3}}],{LeafNode[Symbol,x,Source{{1,4},{1,5}}]},Source{{1,2},{1,5}}]},Source{{1,2},{1,5}}]
Lambda-calculus application juxtaposes the two terms into a :
CallNode
In[3]:=
| LambdaAST |
Out[3]=
ContainerNode[String,{CallNode[LeafNode[Symbol,f,Source{{1,1},{1,2}}],{LeafNode[Symbol,x,Source{{1,3},{1,4}}]},Source{{1,1},{1,4}}]},Source{{1,1},{1,4}}]
Properties & Relations
(1)
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