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https://issues.apache.org/jira/browse/MATH-192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12635236#action_12635236
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Phil Steitz commented on MATH-192:
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Any progress on the IP issues here?
> Operator precedence driven parser
> ----------------------------------
>
> Key: MATH-192
> URL: https://issues.apache.org/jira/browse/MATH-192
> Project: Commons Math
> Issue Type: New Feature
> Environment: Tested with commons-math-1.2-RC1-src
> Reporter: Axel Kramer
> Priority: Minor
> Fix For: 2.0
>
> Attachments: parser.zip
>
>
> Attached are sources for an operator precedence driven parser as described
> here:
> http://en.wikipedia.org/wiki/Operator-precedence_parser
> At the moment the used syntax for the math expressions is very similar to the
> Mathematica input syntax
> and must probably be reworked for the common maths needs.
> Mainly the parser is driven by the arrays HEADER_STRINGS, OPERATOR_STRINGS
> and OPERATORS in the:
> org.matheclipse.parser.operator.ASTNodeFactory
> class.
> There's a utility class
> org.matheclipse.parser.util.GenerateOperatorArrays
> which generates the above arrays for operator sets defined in a textfile like
> for example
> /org.matheclipse.parser/eval/src/operators.txt
> JUnit test classes for testing the pure parser without any evaluations:
> /org.matheclipse.parser.test/src/org/matheclipse/parser/test/AllParserTests.java
> JUnit test classes for testing the evaluation in double or Complex
> calculation mode:
> /org.matheclipse.parser.test/src/org/matheclipse/parser/test/eval/AllEvalTests.java
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