Wolfram Language Paclet Repository
Community-contributed installable additions to the Wolfram Language
Wolfram`Parser`
GroupNode  |
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▪
GroupNode
CodeParser
sown
`GroupNode
▪
kind is a language-native descriptor string such as , , , or . It records what kind of bracketed construct produced the group, not its delimiter glyphs.
"Paren"
"Object"
"Array"
"List"
"Loop"
▪
children is the list of enclosed nodes, possibly empty (an empty object or empty list is a with no children).
GroupNode
▪
emits a for and a for . emits a for a loop body. uses for the empty list (a non-empty list becomes a instead).
GroupNode["Object",…]
{…}
GroupNode["Array",…]
[…]
GroupNode["Loop",…]
[…]
GroupNode["List",{}]
()
▪
meta holds a position when the group comes from a real parse, and is an empty when you build the node by hand (or for a group with no content, like the empty Lisp list ). The recorded span covers the group's content, not its delimiter glyphs.
"Source"
()
Examples
(3)
Basic Examples
(1)
A group built literally holds its kind and child list:
In[1]:=
 | GroupNode |
 | LeafNode |
Out[1]=
GroupNode[Paren,{LeafNode[Integer,1,]},]
In[2]:=
| JSONAST |
Out[2]=
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}}]
A Brainfuck loop body is a of command leaves:
GroupNode["Loop",…]
In[3]:=
| BrainfuckAST |
Out[3]=
ContainerNode[String,{LeafNode[Command,+,Source{{1,1},{1,2}}],GroupNode[Loop,{LeafNode[Command,>,Source{{1,3},{1,4}}]},Source{{1,3},{1,4}}]},Source{{1,1},{1,4}}]
Scope
(1)
Properties & Relations
(1)
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