Implementation of the primitive compiler

🔴 Language BNF grammar

program           -> declaration_lists | expression_lists
declaration_lists -> declaration_lists var_declaration | var_declaration
var_declaration   -> type_specifier identifier;
type_specifier    -> byte | short | int | long

expression_lists  -> expression_lists expression | expression
expression        -> mutable = common_expression;
common_expression -> sum_expression mul_operator mul_expression | mul_expression mul_operator sum_expression | 
                     sum_expression sum_operator mul_expression | mul_expression sum_operator sum_expression |   
                     sum_expression | mul_expression                     
sum_expression    -> sum_expression sum_operator factor | factor sum_operator factor
mul_expression    -> mul_expression mul_operator factor | factor mul_operator factor
factor            -> mutable | imutable
mutable           -> identifier
imutable          -> expression | constant
sum_operator      -> + | -
mul_operator      -> * | / 
constant          -> digit

identifier  -> letter_listdigit_list | letter_list 
letter_list -> letter_list letter | letter
digit_list  -> digit_list digit | digit
letter      -> a | ... | z | A | ... | Z
digit       -> 0 | ... | 9

🔴 Example of the program with current grammar

int value1;
int value2;
int result1;
int result2;

value1 = 5;
value2 = 15;
result1 = 0;
result2 = 0;

result1 = value1 * value2 - value2 / value1;
result2 = value1 + value1 * value2 + value2;

🔴 How to build compiler

Current project uses CMake system for building application. You can build compiler by your platform, using the following commands:

mkdir Build
cd Build
cmake ..

🔴 How to use compiler

List of arguments for compilation:

Program usage:
  -h [ --help ]         Show help message.
  -i [ --input ] arg    Input source file.
  -o [ --output ] arg   Output executable file.

Example of usage compiler:

./Compiler -i SourceFile.as -o ExecutableFile