re-implement range

[JessonChan]

No description provided.

[codecov-commenter]

Codecov Report

Merging #563 into master will decrease coverage by 0.05%.
The diff coverage is 87.71%.

@@            Coverage Diff             @@
##           master     #563      +/-   ##
==========================================
- Coverage   90.22%   90.16%   -0.06%     
==========================================
  Files          40       41       +1     
  Lines       10329    10463     +134     
==========================================
+ Hits         9319     9434     +115     
- Misses        722      739      +17     
- Partials      288      290       +2     

Impacted Files	Coverage Δ
ast/gopiter/gop_iter.go	70.96% <70.96%> (ø)
cl/stmt.go	93.39% <93.75%> (-0.20%)	⬇️
exec/golang/expr.go	94.16% <100.00%> (+0.04%)	⬆️
exec/bytecode/goinstr_lstcompr.go	92.34% <0.00%> (-1.06%)	⬇️
exec/golang/stmt.go	95.96% <0.00%> (-0.81%)	⬇️
cmd/internal/export/gopkg/export.go	91.55% <0.00%> (+0.05%)	⬆️
cl/expr.go	86.45% <0.00%> (+0.17%)	⬆️
cmd/internal/export/gopkg/exporter.go	93.18% <0.00%> (+0.27%)	⬆️
cl/type_decl.go	85.71% <0.00%> (+0.99%)	⬆️

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