Improved error handling

src/build/Function.go

@@ -7,14 +7,16 @@ import (
 	"git.akyoto.dev/cli/q/src/build/arch/x64"
 	"git.akyoto.dev/cli/q/src/build/asm"
 	"git.akyoto.dev/cli/q/src/build/config"
+	"git.akyoto.dev/cli/q/src/build/fs"
 	"git.akyoto.dev/cli/q/src/build/token"
+	"git.akyoto.dev/cli/q/src/errors"
 	"git.akyoto.dev/go/color/ansi"
 )
 
 // Function represents a function.
 type Function struct {
 	Name      string
-	File      *File
+	File      *fs.File
 	Head      token.List
 	Body      token.List
 	Variables map[string]*Variable
@@ -74,19 +76,24 @@ func (f *Function) Compile() {
 	f.Assembler.Return()
 
 	if config.Verbose {
-		fmt.Println()
-		ansi.Bold.Println(f.Name + ".asm")
+		f.PrintAsm()
+	}
+}
 
-		for _, x := range f.Assembler.Instructions {
-			ansi.Dim.Print("│ ")
-			fmt.Print(x.Mnemonic.String())
+// PrintAsm shows the assembly instructions.
+func (f *Function) PrintAsm() {
+	fmt.Println()
+	ansi.Bold.Println(f.Name + ".asm")
 
-			if x.Data != nil {
-				fmt.Print(" " + x.Data.String())
-			}
+	for _, x := range f.Assembler.Instructions {
+		ansi.Dim.Print("│ ")
+		fmt.Print(x.Mnemonic.String())
 
-			fmt.Print("\n")
+		if x.Data != nil {
+			fmt.Print(" " + x.Data.String())
 		}
+
+		fmt.Print("\n")
 	}
 }
 
@@ -116,8 +123,7 @@ func (f *Function) CompileInstruction(line token.List) error {
 			value := line[2:]
 
 			if len(value) == 0 {
-				return fmt.Errorf("error to be implemented")
-				// return errors.New(errors.MissingAssignmentValue, f.File.Path, f.File.Tokens, f.Cursor)
+				return errors.New(errors.MissingAssignmentValue, f.File, line[1].After())
 			}
 
 			if config.Verbose {