Supported primitives:
⍬
+ - × ÷ * ⍟ ○ √ ⌊ ⌈ ⸠ < ≤ = ≥ > ≠ ∧ ∨ ⍲ ⍱ ⊕ ⊗ ≡ ≢ ⍴ , ⊖ ⍮ ⊂ ⊃ ⊇ ↑ ↓ ⊣ ⊢ ⍳ ⍸ ⌿ | ∡ ℜ ℑ ∪ ∩ ~ § ∊
⍨ ⤈ ⤉ ⇟ ⇞ ¨ ᐵ ᑈ
⍤ ⍥ ∘ ⍛ ⊸ ⟜
Supported features:
* dfns {code}, d-monadic-ops _{code}, d-dyadic-ops _{code}_
⍺ left argument, ⍵ right argument,
⍺⍺ left array operand, ⍶⍶ left function operand, ⍵⍵ right array operand, ⍹⍹ right function operand,
∇ recurse function, _∇ recurse monadic op, _∇_ recurse dyadic op
■ early exit, : guard
⋄ multiple statements
* numbers: . decimal separator, ¯ negative sign, ⏨ exponent notation, ᴊ complex separator
* character literals: 'abc'
* string literals: "abc" with escapes using ⍘
* names: abc array, Abc function, _Abc monadic op, _Abc_ dyadic op, assignment with ←
* get ⎕ read evaluated input, get ⍞ read string input, set ⎕ print with newline, set ⍞ print without newline
* array notation: ⟨⋄⟩ vector, [⋄] higher rank array (combine major cells)
* comments: ⟃⟄ inline
