chore: update dependencies

Signed-off-by: Alejandro Mery <amery@jpi.io>

lexer/position.go

@@ -64,23 +64,3 @@ func (p *Position) StepLine() {
 	p.Line++
 	p.Column = 1
 }
-
-// Add adds a relative position considering
-// potential new lines
-func (p *Position) Add(rel Position) {
-	if p.Line == 0 {
-		p.Reset()
-	}
-
-	switch {
-	case rel.Line == 0:
-		// nothing
-	case rel.Line > 1:
-		// includes new lines
-		p.Line += rel.Line - 1
-		p.Column = rel.Column
-	default:
-		// same line
-		p.Column += rel.Column - 1
-	}
-}

parser/parser.go

@@ -0,0 +1,2 @@
+// Package parser implements some common logic of asciigoat based parsers
+package parser

parser/text.go

@@ -0,0 +1,72 @@
+package parser
+
+import (
+	"bytes"
+	"io"
+	"strings"
+
+	"asciigoat.org/core/lexer"
+)
+
+// TextParser ...
+type TextParser struct {
+	src *lexer.Reader
+	pos lexer.Position
+}
+
+// Position ...
+func (p *TextParser) Position() lexer.Position {
+	return p.pos
+}
+
+// StepLine ...
+func (p *TextParser) StepLine() {
+	p.src.Discard()
+	p.pos.StepLine()
+}
+
+// Step ...
+func (p *TextParser) Step() {
+	s := p.src.Emit()
+	p.pos.StepN(len(s))
+}
+
+// Emit ...
+func (p *TextParser) Emit() Token {
+	t := Token{
+		Value:    p.src.Emit(),
+		Position: p.pos,
+	}
+
+	p.pos.StepN(t.Len())
+	return t
+}
+
+// Peek ...
+func (p *TextParser) Peek() string {
+	return p.src.String()
+}
+
+// NewTextParser ...
+func NewTextParser(r io.Reader) *TextParser {
+	if r == nil {
+		r = strings.NewReader("")
+	}
+
+	p := &TextParser{
+		src: lexer.NewReader(r),
+	}
+	p.pos.Reset()
+
+	return p
+}
+
+// NewTextParserBytes ...
+func NewTextParserBytes(b []byte) *TextParser {
+	return NewTextParser(bytes.NewReader(b))
+}
+
+// NewTextParserString ...
+func NewTextParserString(s string) *TextParser {
+	return NewTextParser(strings.NewReader(s))
+}

parser/token.go

@@ -0,0 +1,31 @@
+package parser
+
+import (
+	"fmt"
+
+	"asciigoat.org/core/lexer"
+)
+
+// Token ...
+type Token struct {
+	lexer.Position
+
+	Type  uint
+	Value string
+}
+
+// Len ...
+func (t Token) Len() int {
+	return len(t.Value)
+}
+
+// String generates the '%v' value
+func (t Token) String() string {
+	return t.Value
+}
+
+// GoString generates the '%#v' value
+func (t Token) GoString() string {
+	return fmt.Sprintf("Token{Position{%v,%v}, %v, %q}",
+		t.Line, t.Column, t.Type, t.Value)
+}

reflective/docs.go

@@ -0,0 +1,2 @@
+// Package reflective assists reflection-driven unmarshalling
+package reflective

reflective/error.go

@@ -0,0 +1,69 @@
+package reflective
+
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+)
+
+// An InvalidUnmarshalError describes an invalid argument passed to New.
+// (It must be a non-nil pointer.)
+type InvalidUnmarshalError struct {
+	Method string
+	Prefix string
+
+	reflect.Type
+}
+
+func (e *InvalidUnmarshalError) Error() string {
+	var buf bytes.Buffer
+
+	if e.Prefix != "" {
+		_, _ = fmt.Fprintf(&buf, "%s: ", e.Prefix)
+	}
+
+	method := e.Method
+	if method == "" {
+		method = "New"
+	}
+
+	_, _ = fmt.Fprintf(&buf, "%s(", method)
+
+	switch {
+	case e.Type == nil:
+		_, _ = buf.WriteString("nil")
+	case e.Type.Kind() != reflect.Pointer:
+		_, _ = fmt.Fprintf(&buf, "%s %s", "non-pointer", e.Type.String())
+	default:
+		_, _ = fmt.Fprintf(&buf, "%s %s", "nil", e.Type.String())
+	}
+
+	_, _ = buf.WriteString(")")
+
+	return buf.String()
+}
+
+// An UnmarshalTypeError tells something went wrong while processing
+// a type.
+type UnmarshalTypeError struct {
+	Prefix string
+	Err    error
+
+	reflect.Type
+}
+
+func (e UnmarshalTypeError) Unwrap() error {
+	return e.Err
+}
+
+func (e UnmarshalTypeError) Error() string {
+	var buf bytes.Buffer
+
+	if e.Prefix != "" {
+		_, _ = fmt.Fprintf(&buf, "%s: ", e.Prefix)
+	}
+
+	_, _ = fmt.Fprintf(&buf, "%s: %s", e.Type.String(), e.Err)
+
+	return buf.String()
+}

reflective/helpers.go

@@ -0,0 +1,15 @@
+package reflective
+
+import "reflect"
+
+// IsZero tells if a value is zero either via
+// v.IsZero() or reflection.
+func IsZero(iv any) bool {
+	if p, ok := iv.(interface {
+		IsZero() bool
+	}); ok {
+		return p.IsZero()
+	}
+
+	return reflect.ValueOf(iv).IsZero()
+}

reflective/reflection.go

@@ -0,0 +1,27 @@
+package reflective
+
+import "reflect"
+
+// Reflection provides Marshalling/Unmarshalling oriented view
+// of a value
+type Reflection struct {
+	v reflect.Value
+}
+
+// New creates a Reflection of the given pointer
+func New(v any) (*Reflection, error) {
+	rv := reflect.ValueOf(v)
+
+	if rv.Kind() != reflect.Pointer || rv.IsNil() {
+		err := &InvalidUnmarshalError{
+			Type: rv.Type(),
+		}
+		return nil, err
+	}
+
+	r := &Reflection{
+		v: rv,
+	}
+
+	return r, nil
+}