Decaf compiler (MIT OCW 6.035)

The compiler has my own elements (both intentionally and unintentionally) to it because it is self-studied. Explanation of components

* Scanner - syntax scanner that divides the text file into symbols, strings, integers and operands

* Parser - mostly non contextual, analyses everything the scanner gives it and decides if everything makes sense within the context of that line. Using a stack and shifting + reducing (shift-reduce parser)

* Semantic analyser - analyses the context of everything, void return in an integer function, string comparison with integer, variable exists, out of bounds array reference, etc...

Code generator - in the works...

RUNNING SCANNER/PARSER/SEMANTIC

chmod 755 semantic_test.pl ./semantic_test.pl

Example: ./scanner parse new1 (where new1 is in parser_tests/)