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implemented computed goto support

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This commit is contained in:
Araq 2013-08-13 11:21:02 +02:00
commit d53f313599
7 changed files with 116 additions and 12 deletions
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tests/compile/tcomputedgoto.nim Normal file
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discard """
output: '''yeah A
yeah A
yeah CD
yeah CD
yeah A
yeah CD
yeah CD
yeah A
yeah B
yeah A
yeah A
yeah A'''
"""
type
MyEnum = enum
enumA, enumB, enumC, enumD, enumE
proc vm() =
var instructions: array [0..100, MyEnum]
instructions[2] = enumC
instructions[3] = enumD
instructions[4] = enumA
instructions[5] = enumD
instructions[6] = enumC
instructions[7] = enumA
instructions[8] = enumB
instructions[12] = enumE
var pc = 0
while true:
{.computedGoto.}
case instructions[pc]
of enumA:
echo "yeah A"
of enumC, enumD:
echo "yeah CD"
of enumB:
echo "yeah B"
of enumE:
return
inc(pc)
vm()