parser: introduce NewError() to create lexer.Error using lexer.Position

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

parser/error.go

@@ -0,0 +1,16 @@
+package parser
+
+import (
+	"asciigoat.org/core/lexer"
+)
+
+// NewError creates a lexer.Error using a lexer.Position
+func NewError(pos lexer.Position, content, hint string, err error) *lexer.Error {
+	return &lexer.Error{
+		Line:    pos.Line,
+		Column:  pos.Column,
+		Content: content,
+		Hint:    hint,
+		Err:     err,
+	}
+}

parser/parser.go

@@ -31,13 +31,7 @@ func defaultOnToken(pos lexer.Position, typ TokenType, value string) error {
 func defaultOnError(pos lexer.Position, content string, err error) error {
 	log.Printf("%s:%v:%v: %q: %s", "error", pos.Line, pos.Column, content, err)
 
-	return lexer.Error{
-		Line:   pos.Line,
-		Column: pos.Column,
-
-		Content: content,
-		Err:     err,
-	}
+	return NewError(pos, content, "", err)
 }
 
 func (p *Parser) setDefaults() {