lexer's Introduction
README file for Programming Assignment 2 (C++ edition) ===================================================== Your directory should now contain the following files: Makefile -> [course dir]/src/PA2/Makefile README cool.flex test.cl lextest.cc -> [course dir]/src/PA2/lextest.cc mycoolc -> [course dir]/src/PA2/mycoolc stringtab.cc -> [course dir]/src/PA2/stringtab.cc utilities.cc -> [course dir]/src/PA2/utilities.cc handle_flags.cc -> [course dir]/src/PA2/handle_flags.cc *.d dependency files *.* other generated files The include (.h) files for this assignment can be found in [course dir]/include/PA2 The Makefile contains targets for compiling and running your program. DO NOT MODIFY. cool.flex is a skeleton file for the specification of the lexical analyzer. You should complete it with your regular expressions, patterns and actions. test.cl is a COOL program that you can test the lexical analyzer on. It contains some errors, so it won't compile with coolc. However, test.cl does not exercise all lexical constructs of COOL and part of your assignment is to rewrite test.cl with a complete set of tests for your lexical analyzer. cool-parse.h contains definitions that are used by almost all parts of the compiler. DO NOT MODIFY. stringtab.{cc|h} and stringtab_functions.h contains functions to manipulate the string tables. DO NOT MODIFY. utilities.{cc|h} contains functions used by the main() part of the lextest program. You may want to use the strdup() function defined in here. Remember that you should not print anything from inside cool.flex! DO NOT MODIFY. lextest.cc contains the main function which will call your lexer and print out the tokens that it returns. DO NOT MODIFY. mycoolc is a shell script that glues together the phases of the compiler using Unix pipes instead of statically linking code. While inefficient, this architecture makes it easy to mix and match the components you write with those of the course compiler. DO NOT MODIFY. cool-lexer.cc is the scanner generated by flex from cool.flex. DO NOT MODIFY IT, as your changes will be overritten the next time you run flex. The *.d files are automatically generated Makefiles that capture dependencies between source and header files in this directory. These files are updated automatically by Makefile; see the make documentation for a detailed explanation. Instructions ------------ To compile your lextest program type: % make lexer Run your lexer by putting your test input in a file 'foo.cl' and run the lextest program: % ./lexer foo.cl To run your lexer on the file test.cl type: % make dotest If you think your lexical analyzer is correct and behaves like the one we wrote, you can actually try 'mycoolc' and see whether it runs and produces correct code for any examples. If your lexical analyzer behaves in an unexpected manner, you may get errors anywhere, i.e. during parsing, during semantic analysis, during code generation or only when you run the produced code on spim. So beware. Instructions for turning in the assignment will be posted on the course web page. GOOD LUCK!
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