Simplified file structure

src/core/CompileIf.go

@@ -0,0 +1,55 @@
+package core
+
+import (
+	"fmt"
+
+	"git.akyoto.dev/cli/q/src/asm"
+	"git.akyoto.dev/cli/q/src/ast"
+)
+
+// CompileIf compiles a branch instruction.
+func (f *Function) CompileIf(branch *ast.If) error {
+	f.count.branch++
+
+	var (
+		end     string
+		success = fmt.Sprintf("%s_if_%d_true", f.UniqueName, f.count.branch)
+		fail    = fmt.Sprintf("%s_if_%d_false", f.UniqueName, f.count.branch)
+		err     = f.CompileCondition(branch.Condition, success, fail)
+	)
+
+	if err != nil {
+		return err
+	}
+
+	f.AddLabel(success)
+	f.PushScope(branch.Body, f.File.Bytes)
+	err = f.CompileAST(branch.Body)
+
+	if err != nil {
+		return err
+	}
+
+	if branch.Else != nil {
+		end = fmt.Sprintf("%s_if_%d_end", f.UniqueName, f.count.branch)
+		f.Jump(asm.JUMP, end)
+	}
+
+	f.PopScope()
+	f.AddLabel(fail)
+
+	if branch.Else != nil {
+		f.PushScope(branch.Else, f.File.Bytes)
+		err = f.CompileAST(branch.Else)
+
+		if err != nil {
+			return err
+		}
+
+		f.PopScope()
+		f.AddLabel(end)
+		return nil
+	}
+
+	return nil
+}