Update dependencies (#1784)

vendor/github.com/graph-gophers/graphql-go/internal/common/literals.go

@@ -0,0 +1,58 @@
+package common
+
+import (
+	"text/scanner"
+
+	"github.com/graph-gophers/graphql-go/types"
+)
+
+func ParseLiteral(l *Lexer, constOnly bool) types.Value {
+	loc := l.Location()
+	switch l.Peek() {
+	case '$':
+		if constOnly {
+			l.SyntaxError("variable not allowed")
+			panic("unreachable")
+		}
+		l.ConsumeToken('$')
+		return &types.Variable{Name: l.ConsumeIdent(), Loc: loc}
+
+	case scanner.Int, scanner.Float, scanner.String, scanner.Ident:
+		lit := l.ConsumeLiteral()
+		if lit.Type == scanner.Ident && lit.Text == "null" {
+			return &types.NullValue{Loc: loc}
+		}
+		lit.Loc = loc
+		return lit
+	case '-':
+		l.ConsumeToken('-')
+		lit := l.ConsumeLiteral()
+		lit.Text = "-" + lit.Text
+		lit.Loc = loc
+		return lit
+	case '[':
+		l.ConsumeToken('[')
+		var list []types.Value
+		for l.Peek() != ']' {
+			list = append(list, ParseLiteral(l, constOnly))
+		}
+		l.ConsumeToken(']')
+		return &types.ListValue{Values: list, Loc: loc}
+
+	case '{':
+		l.ConsumeToken('{')
+		var fields []*types.ObjectField
+		for l.Peek() != '}' {
+			name := l.ConsumeIdentWithLoc()
+			l.ConsumeToken(':')
+			value := ParseLiteral(l, constOnly)
+			fields = append(fields, &types.ObjectField{Name: name, Value: value})
+		}
+		l.ConsumeToken('}')
+		return &types.ObjectValue{Fields: fields, Loc: loc}
+
+	default:
+		l.SyntaxError("invalid value")
+		panic("unreachable")
+	}
+}