This is free software. See enclosed LICENSE file for full licensing terms.
simplec demonstrates the use of yacc (bison) and lex (flex) to construct a basic compiler using C and C++.
Download Link: simplec-1.0.tar.gz
-Andrew Tomazos <firstname.lastname@example.org>
The grammar of the simplec language is as follows:
CompilationUnit: (Statement ';')+ # a compilation unit conists of # semi-colon seperated statements Statement: LocalVarDecl # declare a variable: int a; Assignment # assign a variable: a = b; ScanStmt # read input into variable: scan a; PrintStmt # print out a variable: print a; LocalVarDecl: "int" Identifier PrintStmt: "print" Identifier ScanStmt: "scan" Identifier Assignment: Identifier "=" Expression Expression: Identifier Number "(" Expression ")" Expression Operator Expression "-" Expression # negation Operator: "+" | "-" | "*" | "/"
To create the compiler, call make:
$ cd simplec-1.0 $ make
This will compile everything into an executable called "simplec" and then will perform a test. Ideally you should see "test passed".
To use the resulting "simplec", write a program with the above grammar. (See "test_program" for an example). Save it to a file "my_program" and then execute it as follows:
$ simplec my_program
Standard input is used for scan statements, standard output is used for print statements. They can be redirected.
To execute the included test manually do the following:
$ simplec test_program < test_input > test_output $ diff test_output test_expected
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