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

Frederic G. MARAND c262d2bded §2.8 If/else expressions.		пре 5 година
..
parser.go	c262d2bded §2.8 If/else expressions.	пре 5 година
parser_test.go	c262d2bded §2.8 If/else expressions.	пре 5 година
parser_tracing.go	c262d2bded §2.8 If/else expressions.	пре 5 година