class compiler::WhileStmt
sys::Obj compiler::Node compiler::Stmt compiler::WhileStmt
WhileStmt models a while loop of the format:
while (condition) block
- block
 - 
Block block - condition
 - 
Expr condition - isDefiniteAssign
 - isExit
 - 
virtual override Bool isExit() - make
 - walkChildren
 - 
virtual override Void walkChildren(Visitor v, VisitDepth depth)