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Eclipse Plug-in for Authoring and Debugging Higher-order Rewriting

Eclipse Plug-in for Authoring and Debugging Higher-order Rewriting. Takahide Nogayama. Contents. Overview Rule file editor Debug tool for CRSX rewriting Prepare CRSX sample source code The simplest sample “Calc” Open rule file with eclipse plug-in Install eclipse plug-in for CRSX.

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Eclipse Plug-in for Authoring and Debugging Higher-order Rewriting

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  1. Eclipse Plug-in for Authoring and Debugging Higher-order Rewriting Takahide Nogayama

  2. Contents • Overview • Rule file editor • Debug tool for CRSX rewriting • Prepare CRSX sample source code • The simplest sample “Calc” • Open rule file with eclipse plug-in • Install eclipse plug-in for CRSX

  3. Rule file editor Highlighting Outlining Syntax checking Debug tool Iterative rewriting Break point against rules Overview

  4. The Simplest Sample “Calc” • Download crsx22.zip from • http://sourceforge.net/projects/crsx/ • Unzip crsx22.zip • Run CRSX to calculate “1 + 2 + 3” $unzip crsx22.zip $java -jar crsx.jar -cp src “grammar={'net.sf.crsx.samples.calc.CalcParser'}” rules=samples/calc/interpret.crs category=P “term=1 + 2 + 3” 6 • 1 + 2 + 3 • 1 + 5 • 6

  5. Open crs rule file with rule editor • Start eclipse • Create java project and copy files under crsx19 • Right click samples/calc/interpret.crs Notify syntax error Jump by clicking outline Highlight syntax

  6. Debug Tool for CRSX Rewriting (1) • Right click rule file • Select “CRSX”, and “Start iterative rewriting” (Perspective will be changed to “CRSX perspective”) • Set arguments into “program arguments” text field • Click “Start” button

  7. Debug Tool for CRSX Rewriting (1) • For each clicking “Next” button, one rewriting rule is applied to term 1 + 2 + 3 1 + 5 6

  8. Debug Scenario Minus rule has a bug. The right term must be $[Minus, #I1, #I2] • Assuming the Calc rule has a bug. (The right term of minus rule is Plus) • A rule developer realizes the result of rewriting “1 + 2 – 3” is “6”. But it should be “0”. He wants to know which rule has issue. • The developer starts iterative rewriting. • The developer can find out the minus rule has an issue because the result of minus operator is 5 which is not expected. The result of “2 – 3” must be “-1” but is 5

  9. Prerequisite eclipse for java Doroid font Install Start eclipse Select “Help”, “Install New Software” Add repository CRSX http://crsx.sourceforge.net/eclipse-plugin/site.xml Click Next Install Eclipse Plug-in for CRSX

  10. Uninstall Start eclipse Select “Help”, “About Eclipse” Click “Installation Details” button Click “Installed Software” tab Select “CRSX eclipse future” Click “Uninstall” button Uninstall Eclipse Plug-in for CRSX

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