OpenEuphoria

Euphoria BNF updated

• Posted by _tom (admin) Jan 17, 2014
• 1354 views

The official definition of Euphoria is the interpeter.

I have updated the BNF description of Euphoria. It's not complete but better than what is in the documentation. See: http://openeuphoria.org/wiki/view/NewDocs_euBNF.wc

It looks like:

---

1. alpha = ^"a^" .. ^"z^" | ^"A^" .. ^"Z^"

2. digit = ^"0^" .. ^"9^"

3. uscore = ^"_^"

4. eol = ^"new_line_character^"

5. name = ( alpha₁ | uscore₃ ) { alpha₁ | digit₂ | uscore₃ }

6. spacename = name₅ ^":^"

7. identifier = [ spacename₆ ] name₅

8. atom = atom_integer_lit₉ | atom_real_lit₁₀

9. atom_integer_lit = ^"-2^53" .. ^"+2^53" | ^"-9.007e15^" .. ^"+9.007e15^"

10. atom_real_lit = ^"-2¹⁰²⁴+1^" .. ^"+2¹⁰²⁴-1^" | ^"-1.798e308+1^" .. ^"+1.798e308-1^"

11. integer = integer_lit₁₂

12. integer_lit = ^"-2^30" .. ^"+2³⁰-1^" | ^"-1_073_741_824^" .. ^"+1_073_741_823^"

13. sequence = ^"{^" [ object₁₄ ] { ^",^" object₁₄ } [ ^",^{" "}$^" ] ^"}^"

14. object = atom₈ | integer₁₁ | sequence₁₃

---

and continues on for a hundred more lines.

_tom

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