tree: allow floats to be pinned

toml-config/src/config/parsers/float.rs

@@ -0,0 +1,48 @@
+use {
+    crate::{
+        config::{
+            context::Context,
+            extractor::{Extractor, ExtractorError, bol, opt, recover},
+            parser::{DataType, ParseResult, Parser, UnexpectedDataType},
+        },
+        toml::{
+            toml_span::{DespanExt, Span, Spanned},
+            toml_value::Value,
+        },
+    },
+    indexmap::IndexMap,
+    thiserror::Error,
+};
+
+#[derive(Debug, Error)]
+pub enum FloatParserError {
+    #[error(transparent)]
+    Expected(#[from] UnexpectedDataType),
+    #[error(transparent)]
+    Extract(#[from] ExtractorError),
+}
+
+pub struct FloatParser<'a>(pub &'a Context<'a>);
+
+#[derive(Debug, Clone)]
+pub struct Float {
+    pub show_pin_icon: Option<bool>,
+}
+
+impl Parser for FloatParser<'_> {
+    type Value = Float;
+    type Error = FloatParserError;
+    const EXPECTED: &'static [DataType] = &[DataType::Table];
+
+    fn parse_table(
+        &mut self,
+        span: Span,
+        table: &IndexMap<Spanned<String>, Spanned<Value>>,
+    ) -> ParseResult<Self> {
+        let mut ext = Extractor::new(self.0, span, table);
+        let (show_pin_icon,) = ext.extract((recover(opt(bol("show-pin-icon"))),))?;
+        Ok(Float {
+            show_pin_icon: show_pin_icon.despan(),
+        })
+    }
+}