fgm/waiig15: My version of the Writing an Interpreter in Go 1.5 code. @ eeb70c7c03eaf48881f6d426271efd668c150230

Frederic G. MARAND eeb70c7c03 §1.3 final passing version.		6 年之前
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lexer.go	eeb70c7c03 §1.3 final passing version.	6 年之前
lexer_test.go	eeb70c7c03 §1.3 final passing version.	6 年之前