Line-skip compiler for source-code development system
US5201050A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1989 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Jun 30, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F8/71
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer-aided software development system includes programs to implement edit, compile, link and run sequences, all from memory, at very high speed. The compiler operates on an incremental basis, line-by-line, so if only one line is changed in an edit session, then only that line need be recompiled if no other code is affected. Scanning is done incrementally, and the resulting token list saved in memory to be used again where no changes are made. All of the linking tables are saved in memory so there is no need to generate link tables for increments of code where no changes in links are needed. The parser is able to skip lines or blocks of lines of source code which haven't been changed; for this purpose, each line of source text in the editor has a change-tag to indicate whether this line has been changed, and from this change-tag information a descriptor table is built having a clean-lines indication for each line of source code, indicating how many clean lines follow the present line. All of the source code text modules, the token lists, symbol tables, code tables and related data saved from one compile to another are maintained in virtual memory rather than in files so that …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.