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package script
import (
"go/ast"
)
// if statement
type ifStmt struct {
cond, body, else_ Expr
void
}
func (b *ifStmt) Eval() interface{} {
if b.cond.Eval().(bool) {
b.body.Eval()
} else {
if b.else_ != nil {
b.else_.Eval()
}
}
return nil // void
}
func (w *World) compileIfStmt(n *ast.IfStmt) *ifStmt {
w.EnterScope()
defer w.ExitScope()
stmt := &ifStmt{
cond: typeConv(n.Cond.Pos(), w.compileExpr(n.Cond), bool_t),
body: w.compileBlockStmt_noScope(n.Body)}
if n.Else != nil {
stmt.else_ = w.compileStmt(n.Else)
}
return stmt
}
func (e *ifStmt) Child() []Expr {
child := []Expr{e.cond, e.body, e.else_}
if e.else_ == nil {
child = child[:2]
}
return child
}
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