Cleaned up function type

src/build/Loop.go

@@ -0,0 +1,28 @@
+package build
+
+import (
+	"fmt"
+
+	"git.akyoto.dev/cli/q/src/build/token"
+	"git.akyoto.dev/cli/q/src/errors"
+)
+
+// CompileLoop compiles a loop instruction.
+func (f *Function) CompileLoop(tokens token.List) error {
+	blockStart := tokens.IndexKind(token.BlockStart) + 1
+	blockEnd := tokens.LastIndexKind(token.BlockEnd)
+
+	if blockStart == -1 {
+		return errors.New(errors.MissingBlockStart, f.File, tokens[0].End())
+	}
+
+	if blockEnd == -1 {
+		return errors.New(errors.MissingBlockEnd, f.File, tokens[len(tokens)-1].End())
+	}
+
+	loop := fmt.Sprintf("%s_loop_%d", f.Name, f.count.loop)
+	f.assembler.Label(loop)
+	defer f.assembler.Jump(loop)
+	f.count.loop++
+	return f.CompileTokens(tokens[blockStart:blockEnd])
+}