Proof of concept interpreter based on Flex and Bison (for a language somewhat similar to Python).
Expression types:
- variables
- integers
- booleans
- read-only, generic lists (
[42, "Hello!", True, [-1, 1]]) - read-only strings (
"mystring") - operations with
+,-, etc... (myvar + 1 < 10) - list elements (i.e.
mylist[0]) - built-in functions (reading an integer:
read $ _; getting the length of a string/list:len $ mylist)
Statement types:
- Expression-statement (prints the result of the expression:
1 + 2 + 3;) - Assignment (
mystring = "Hello, World!";) - If-statement (
if <expression> { <body...> }) - If-else-statement (
if <expression> { <body...> } else { <body...> }) - While-statement (
while <expression> { <body...> })
Other features:
- List/String concatenation (
mylist = mylist + [1] + ["yep"];,mystring = "Hello," + " World!";)
- libfmt
- Clang version >= 11.0 (cannot be compiled with GCC because of some syntax limitations regarding non-trivial types in anonymous aggregates)
- flex
- bison
To build, run:
$ sh compile.sh
Test the interpreter on the provided examples, such as:
$ ./pai tests/3.pai