moxy-derive 0.0.4

derive macros for moxy crate
Documentation 
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use quote::quote;

use super::{DisplayOptions, DisplayOutput, Segment, SegmentKind, access};

pub struct DefaultStyleSyntax {
    pub pretty: bool,
}

impl DefaultStyleSyntax {
    pub fn render(&self, opts: &DisplayOptions) -> syn::Result<DisplayOutput> {
        let mut out = DisplayOutput::new();

        out.push(Segment::literal(SegmentKind::Name, &opts.name));

        if opts.is_named {
            out.push(Segment::literal(
                SegmentKind::OpenDelim,
                if self.pretty { " {\n" } else { " { " },
            ));

            for (i, f) in opts.fields.iter().enumerate() {
                let a = access(f, opts.use_self);

                if self.pretty {
                    out.push(Segment::literal(SegmentKind::Assign, "    "));
                }

                out.push(Segment::literal(SegmentKind::FieldName, &f.display_name()?));
                out.push(Segment::literal(SegmentKind::Assign, ": "));
                out.push(Segment::placeholder(SegmentKind::Value, quote! { #a }));

                if self.pretty {
                    out.push(Segment::literal(SegmentKind::Separator, ",\n"));
                } else if i + 1 < opts.fields.len() {
                    out.push(Segment::literal(SegmentKind::Separator, ", "));
                }
            }

            out.push(Segment::literal(
                SegmentKind::CloseDelim,
                if self.pretty { "}" } else { " }" },
            ));
        } else {
            out.push(Segment::literal(
                SegmentKind::OpenDelim,
                if self.pretty { "(\n" } else { "(" },
            ));

            for (i, f) in opts.fields.iter().enumerate() {
                let a = access(f, opts.use_self);

                if self.pretty {
                    out.push(Segment::literal(SegmentKind::Assign, "    "));
                }

                out.push(Segment::placeholder(SegmentKind::Value, quote! { #a }));

                if self.pretty {
                    out.push(Segment::literal(SegmentKind::Separator, ",\n"));
                } else if i + 1 < opts.fields.len() {
                    out.push(Segment::literal(SegmentKind::Separator, ", "));
                }
            }

            out.push(Segment::literal(SegmentKind::CloseDelim, ")"));
        }

        Ok(out)
    }
}