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compiler: allow for loops with empty condition

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This commit is contained in:
Evgenii Stratonikov 2020-03-26 14:57:57 +03:00
parent 198fffb9b8
commit f0b6f783aa
2 changed files with 22 additions and 3 deletions
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8
pkg/compiler/codegen.go
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@ -781,10 +781,12 @@ func (c *codegen) Visit(node ast.Node) ast.Visitor {
// Set label and walk the condition.
c.pushStackLabel(label, 0)
c.setLabel(fstart)
ast.Walk(c, n.Cond)
if n.Cond != nil {
ast.Walk(c, n.Cond)
// Jump if the condition is false
emit.Jmp(c.prog.BinWriter, opcode.JMPIFNOT, fend)
// Jump if the condition is false
emit.Jmp(c.prog.BinWriter, opcode.JMPIFNOT, fend)
}
// Walk body followed by the iterator (post stmt).
ast.Walk(c, n.Body)