Feat/lang tier a#16
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- undef literal
- Ternary operator: condition ? then : else
- List/vector indexing: v[i], v[i][j] (chained postfix)
- let expression: let(x=expr) body_expr (lexical scope)
- let statement: let(x=expr) { geometry } (geometry scope)
- User-defined functions: function f(params) = expr; (recursive)
- for-loop now iterates full Values (supports vector elements)
- Module call arg binding now preserves Value type (was always number)
- New math: asin, acos, atan, atan2, norm, cross, sign
- New builtins: concat, str, chr, ord, log10, len on strings
- 17 new test cases, 115 new assertions
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
10 scenes covering ternary, list indexing, let statement/expression, user-defined functions, recursive functions, concat, and for-loop over vector lists. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- for (var = expr): iterable can now be any expression; if it evaluates
to a vector the elements are expanded automatically, enabling
`for (pt = pts)` where pts is a variable holding a list of vectors
- translate/rotate/scale/mirror: argument is now parsed as a general
expression (was parseVecExpr requiring literal [x,y,z]), enabling
`translate(offset_var)` where offset_var holds a [x,y,z] value
- rotate(scalar): scalar angle now correctly rotates around Z axis
(was producing a zero rotation via evalVec3 → {0,0,0})
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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feat(lang): Tier A language completeness — all the core features
test(scad): add Tier A visual test file
fix(lang): for loop and transform accept expressions, not just literals — the fixes from this session
(The roadmap.md update)