CS2612 PL&Compilers Final Project: an interpreter for a lua subset.
-
./syntax.md: syntax for the Lua subset -
./doc.md: usage for the Lua subset -
./impl.md: some rough implementation details for the interpreter -
./src/source files -
./tests/some test files
cargo run <lua-file>
For example, enter cargo run ./tests/assignment.lua and get the following output:
1 2 3
100 200 nil
0 1 2 3 nil
4 20 4
20 30 10
a, b, c = 1, 2, 3, 4
print(a, b, c) -- 1, 2, 3
d, e, f = 100, 200
print(d, e, f) -- 100, 200, nil
function foo()
return 1, 2, 3
end
g, h, i, j, k = 0, foo()
print(g, h, i, j, k) -- 0, 1, 2, 3, nil
--[[
The assignment statement first evaluates all
its expressions and only then the assignments
are performed.
]]
a = {1, 2, 3, 4}
i = 3
i, a[i] = i+1, 20
print(i, a[3], a[4]) -- 4, 20, 4
x, y, z = 10, 20, 30
x, y, z = y, z, x
print(x, y, z) -- 20, 30, 10-- return a closure
function wrapper(a, b)
function subtract()
return a - b
end
return subtract
end
foo = wrapper(1,2)
print(foo()) -- -1a = {100, 200, b=foo()}
print("length of a:", #a)
print("a.b:", a.b)
print("a['b']", a['b'])
b = {9, 8; 7, 6;}
print("length of b:", #b)
print("b: ", b[1], b[2], b[3], b[4])