libgraphql_parser/ast/
null_value.rs

1use crate::ast::ast_node::append_span_source_slice;
2use crate::ast::AstNode;
3use crate::ByteSpan;
4use crate::SourceMap;
5use crate::SourceSpan;
6use crate::token::GraphQLToken;
7use inherent::inherent;
8
9/// A GraphQL null literal.
10///
11/// See the
12/// [Null Value](https://spec.graphql.org/September2025/#sec-Null-Value)
13/// section of the spec.
14#[derive(Clone, Debug, PartialEq)]
15pub struct NullValue<'src> {
16    pub span: ByteSpan,
17    pub syntax: Option<Box<NullValueSyntax<'src>>>,
18}
19
20/// Syntax detail for a [`NullValue`].
21#[derive(Clone, Debug, PartialEq)]
22pub struct NullValueSyntax<'src> {
23    pub token: GraphQLToken<'src>,
24}
25
26#[inherent]
27impl AstNode for NullValue<'_> {
28    /// See [`AstNode::append_source()`](crate::ast::AstNode::append_source).
29    pub fn append_source(
30        &self,
31        sink: &mut String,
32        source: Option<&str>,
33    ) {
34        if let Some(src) = source {
35            append_span_source_slice(
36                self.span, sink, src,
37            );
38        }
39    }
40
41    /// Returns this null value's byte-offset span within the
42    /// source text.
43    ///
44    /// The returned [`ByteSpan`] can be resolved to line/column
45    /// positions via [`source_span()`](Self::source_span) or
46    /// [`ByteSpan::resolve()`].
47    #[inline]
48    pub fn byte_span(&self) -> ByteSpan {
49        self.span
50    }
51
52    /// Resolves this null value's position to line/column
53    /// coordinates using the given [`SourceMap`].
54    ///
55    /// Returns [`None`] if the byte offsets cannot be resolved
56    /// (e.g. the span was synthetically constructed without
57    /// valid position data).
58    #[inline]
59    pub fn source_span(
60        &self,
61        source_map: &SourceMap,
62    ) -> Option<SourceSpan> {
63        self.byte_span().resolve(source_map)
64    }
65}
libgraphql_parser/ast/null_value.rs

libgraphql_parser/ast/
null_value.rs
