A compiler and interpreter of a toy language. Using C++, Flex and Bison.
The language is called the While language. Its different variants often serve educational purposes. It has two types (boolean and natural), expressions of these two types, assignment instruction, reading from standard input, writing to standard output, branching and looping.
See the test/*.ok files to learn the syntax and semantics of the language.
Make sure you have g++, flex, bison and nasm installed. The project was tested with the following versions: g++ 6.3.0, flex 2.6.1, bison 3.0.4, nasm 2.12.01. It might work with other versions as well.
Use the following command to build the project:
make
Use the following command to run tests:
make test
Use the following command to cleanup all generated files:
make clean
The following command executes a While program immediately:
./while -i path/to/your/while.program
The following command compiles a While language program to NASM assembly:
./while -c path/to/your/while.program > output.asm
To further compile the assembly program to an executable:
nasm -felf output.asm
gcc output.o io.c -o output
Note: Under 64 bit operating systems, pass the -m32 option to gcc.
To run the executable output:
./output
This software is licensed under the MIT license. See the LICENSE file for details.