76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
package core
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"git.akyoto.dev/cli/q/src/build/expression"
|
|
)
|
|
|
|
// CompileCondition inserts code to jump to the start label or end label depending on the truth of the condition.
|
|
func (f *Function) CompileCondition(condition *expression.Expression, successLabel string, failLabel string) error {
|
|
switch condition.Token.Text() {
|
|
case "||":
|
|
f.count.subBranch++
|
|
leftFailLabel := fmt.Sprintf("%s_false_%d", f.Name, f.count.subBranch)
|
|
|
|
// Left
|
|
left := condition.Children[0]
|
|
err := f.CompileCondition(left, successLabel, leftFailLabel)
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
f.JumpIfTrue(left.Token.Text(), successLabel)
|
|
|
|
// Right
|
|
f.AddLabel(leftFailLabel)
|
|
right := condition.Children[1]
|
|
err = f.CompileCondition(right, successLabel, failLabel)
|
|
|
|
if condition.Parent != nil && condition.Parent.Token.Text() == "||" && condition != condition.Parent.LastChild() {
|
|
f.JumpIfTrue(right.Token.Text(), successLabel)
|
|
} else {
|
|
f.JumpIfFalse(right.Token.Text(), failLabel)
|
|
}
|
|
|
|
return err
|
|
|
|
case "&&":
|
|
f.count.subBranch++
|
|
leftSuccessLabel := fmt.Sprintf("%s_true_%d", f.Name, f.count.subBranch)
|
|
|
|
// Left
|
|
left := condition.Children[0]
|
|
err := f.CompileCondition(left, leftSuccessLabel, failLabel)
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
f.JumpIfFalse(left.Token.Text(), failLabel)
|
|
|
|
// Right
|
|
f.AddLabel(leftSuccessLabel)
|
|
right := condition.Children[1]
|
|
err = f.CompileCondition(right, successLabel, failLabel)
|
|
|
|
if condition.Parent != nil && condition.Parent.Token.Text() == "||" && condition != condition.Parent.LastChild() {
|
|
f.JumpIfTrue(right.Token.Text(), successLabel)
|
|
} else {
|
|
f.JumpIfFalse(right.Token.Text(), failLabel)
|
|
}
|
|
|
|
return err
|
|
|
|
default:
|
|
err := f.Compare(condition)
|
|
|
|
if condition.Parent == nil {
|
|
f.JumpIfFalse(condition.Token.Text(), failLabel)
|
|
}
|
|
|
|
return err
|
|
}
|
|
}
|