Wolfram Language Paclet Repository
Community-contributed installable additions to the Wolfram Language
Wolfram`Parser`Languages`Calculator`
CalculatorAST  |
|
| | ||||
▪
CalculatorAST
▪
The grammar covers , unary minus, parentheses, integer and real literals, and bare identifiers. Precedence, tightest first: parentheses, unary minus, (right associative), , .
+
-
*
/
^
^
*
/
+
-
▪
runs the same grammar over instead, evaluating to a number. The grammar is written once; only the algebra differs.
▪
A keeps the literal source text (, not ); the value is only interpreted in the mode.
"1"
1
▪
Every node carries a span in its metadata, a line-column pair . A leaf spans its own text; a composite spans its children, so a multi-line input gives a span whose endpoints sit on different lines.
"Source"
CodeParser
{{startLine,startCol},{endLine,endCol}}
Examples
(4)
Basic Examples
(1)
The tree nests by precedence - binds tighter than :
*
+
In[1]:=
 | CalculatorAST |
Out[1]=
ContainerNode[String,{BinaryNode[+,{LeafNode[Integer,1,Source{{1,1},{1,2}}],BinaryNode[*,{LeafNode[Integer,2,Source{{1,5},{1,6}}],LeafNode[Integer,3,Source{{1,7},{1,8}}]},Source{{1,5},{1,8}}]},Source{{1,1},{1,8}}]},Source{{1,1},{1,8}}]
In[2]:=
| CalculatorAST |
Out[2]=
ContainerNode[String,{PrefixNode[-,LeafNode[Symbol,x,Source{{1,2},{1,3}}],Source{{1,2},{1,3}}]},Source{{1,2},{1,3}}]
In[3]:=
| CalculatorEval |
Out[3]=
7
Scope
(1)
Properties & Relations
(1)
Possible Issues
(1)
 |
|
 |
|
""