I wrote this compiler while attending CS1431 compiler construction course on edx.org. The course is divided into four assignments. In each assignment, we implement one phase of the compilation process. All phases are being tested separately using automated scripts.
Cool, an acronym for Classroom Object Oriented Language. While small enough for a one term project, Cool still has many of the features of modern programming languages, including objects, automatic memory management, strong static typing and simple reflection.
As the primary purpose of Cool is instruction, it lacks many of the features common to other, more general programming languages. For instance, the language supports less than comparisons but not greater than. The syntax is very much stripped down, and the standard library contains only a few basic classes. Separate compilation is not supported, though the compiler does support multiple source files as input. Every Cool program must define a class Main which must have a no argument main method in which execution flow begins. Namespaces are not supported.
Hello World:
class Main inherits IO {
main() : Object {
out_string("Hello, world!\n")
};
};A simple program for computing factorials:
class Main inherits IO {
main(): Object {{
out_string("Enter an integer greater-than or equal-to 0: ");
let input: Int <- in_int() in
if input < 0 then
out_string("ERROR: Number must be greater-than or equal-to 0\n")
else {
out_string("The factorial of ").out_int(input);
out_string(" is ").out_int(factorial(input));
out_string("\n");
}
fi;
}};
factorial(num: Int): Int {
if num = 0 then 1 else num * factorial(num - 1) fi
};
};- Java - The main programming language
- JLex - Scanner generator
- Java-CUP - Parser generator
- Perl - Testing, but why perl?
See the releases page for the latest build
Footnotes
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CS143: Compilers - Stanford's course on the practical and theoretical aspects of compiler construction ↩