1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
use crate::ast::Argument;
use crate::ast::ast_node::append_span_source_slice;
use crate::ast::AstNode;
use crate::ast::DelimiterPair;
use crate::ast::DirectiveAnnotation;
use crate::ast::Name;
use crate::ast::SelectionSet;
use crate::ByteSpan;
use crate::SourceMap;
use crate::SourceSpan;
use crate::token::GraphQLToken;
use inherent::inherent;
/// A field selection within a selection set, optionally
/// aliased, with arguments, directives, and a nested
/// selection set.
///
/// See
/// [Fields](https://spec.graphql.org/September2025/#sec-Language.Fields)
/// in the spec.
#[derive(Clone, Debug, PartialEq)]
pub struct FieldSelection<'src> {
pub alias: Option<Name<'src>>,
pub arguments: Vec<Argument<'src>>,
pub directives: Vec<DirectiveAnnotation<'src>>,
pub name: Name<'src>,
pub selection_set: Option<SelectionSet<'src>>,
pub span: ByteSpan,
pub syntax: Option<Box<FieldSelectionSyntax<'src>>>,
}
/// Syntax detail for a [`FieldSelection`].
#[derive(Clone, Debug, PartialEq)]
pub struct FieldSelectionSyntax<'src> {
/// The colon between alias and field name. `None`
/// when no alias is present.
pub alias_colon: Option<GraphQLToken<'src>>,
pub argument_parens: Option<DelimiterPair<'src>>,
}
impl<'src> FieldSelection<'src> {
/// Returns the name of this field selection as a
/// string slice.
///
/// Convenience accessor for `self.name.value`.
#[inline]
pub fn name_value(&self) -> &str {
self.name.value.as_ref()
}
}
#[inherent]
impl AstNode for FieldSelection<'_> {
/// See [`AstNode::append_source()`](crate::ast::AstNode::append_source).
pub fn append_source(
&self,
sink: &mut String,
source: Option<&str>,
) {
if let Some(src) = source {
append_span_source_slice(
self.span, sink, src,
);
}
}
/// Returns this field selection's byte-offset span
/// within the source text.
///
/// The returned [`ByteSpan`] can be resolved to line/column
/// positions via [`source_span()`](Self::source_span) or
/// [`ByteSpan::resolve()`].
#[inline]
pub fn byte_span(&self) -> ByteSpan {
self.span
}
/// Resolves this field selection's position to
/// line/column coordinates using the given
/// [`SourceMap`].
///
/// Returns [`None`] if the byte offsets cannot be resolved
/// (e.g. the span was synthetically constructed without
/// valid position data).
#[inline]
pub fn source_span(
&self,
source_map: &SourceMap,
) -> Option<SourceSpan> {
self.byte_span().resolve(source_map)
}
}