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abilities syntax has -> implements

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Bryce Miller 2023-05-24 21:30:16 -04:00
parent 91e37293a2
commit dbc0204532
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21 changed files with 89 additions and 84 deletions
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10
crates/compiler/derive/src/decoding/list.rs
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@ -15,7 +15,7 @@ use crate::util::Env;
pub(crate) fn decoder(env: &mut Env<'_>, _def_symbol: Symbol) -> (Expr, Variable) {
// Build
//
// def_symbol : Decoder (List elem) fmt | elem has Decoding, fmt has DecoderFormatting
// def_symbol : Decoder (List elem) fmt | elem has Decoding, fmt implements DecoderFormatting
// def_symbol = Decode.custom \bytes, fmt -> Decode.decodeWith bytes (Decode.list Decode.decoder) fmt
//
// NB: reduction to `Decode.list Decode.decoder` is not possible to the HRR.
@ -27,10 +27,10 @@ pub(crate) fn decoder(env: &mut Env<'_>, _def_symbol: Symbol) -> (Expr, Variable
// List elem
let elem_var = env.subs.fresh_unnamed_flex_var();
// Decode.decoder : Decoder elem fmt | elem has Decoding, fmt has EncoderFormatting
// Decode.decoder : Decoder elem fmt | elem has Decoding, fmt implements EncoderFormatting
let (elem_decoder, elem_decoder_var) = {
// build `Decode.decoder : Decoder elem fmt` type
// Decoder val fmt | val has Decoding, fmt has EncoderFormatting
// Decoder val fmt | val has Decoding, fmt implements EncoderFormatting
let elem_decoder_var = env.import_builtin_symbol_var(Symbol::DECODE_DECODER);
// set val ~ elem
@ -52,7 +52,7 @@ pub(crate) fn decoder(env: &mut Env<'_>, _def_symbol: Symbol) -> (Expr, Variable
};
// Build `Decode.list Decode.decoder` type
// Decoder val fmt -[uls]-> Decoder (List val) fmt | fmt has DecoderFormatting
// Decoder val fmt -[uls]-> Decoder (List val) fmt | fmt implements DecoderFormatting
let decode_list_fn_var = env.import_builtin_symbol_var(Symbol::DECODE_LIST);
// Decoder elem fmt -a-> b
@ -68,7 +68,7 @@ pub(crate) fn decoder(env: &mut Env<'_>, _def_symbol: Symbol) -> (Expr, Variable
)),
);
// Decoder val fmt -[uls]-> Decoder (List val) fmt | fmt has DecoderFormatting
// Decoder val fmt -[uls]-> Decoder (List val) fmt | fmt implements DecoderFormatting
// ~ Decoder elem fmt -a -> b
env.unify(decode_list_fn_var, this_decode_list_fn_var);