add failing tests (found during refactor)
add failing test
[refactor] introduce #getDecoded() for all of the primitive literals, and fix bugs registered in the prev. commit
amend the reasoning and the limitation of detecting conflicting case-labels
Merge branch 'kazuho/experiments/primitive-getdecoded' into kazuho/experiments/macroic-file-and-line
implement __FILE__ and __LINE__
s/ECMA/ECMA262/