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- Closes #2330 - Closes #2329 This pr implements the syntax changes described in #2330. It drops support for the old yaml-based syntax. Some valid examples: ``` syntax iterator for {init := 1; range := 1}; syntax fixity cons := binary {assoc := right}; syntax fixity cmp := binary; syntax fixity cmp := binary {}; -- debatable whether we want to accept empty {} or not. I think we should ``` # Future work This pr creates an asymmetry between iterators and operators definitions. Iterators definition do not require a constructor. We could add it to make it homogeneous, but it looks a bit redundant: ``` syntax iterator for := mkIterator {init := 1; range := 1}; ``` We could consider merging iterator and fixity declarations with this alternative syntax. ``` syntax XXX for := iterator {init := 1; range := 1}; syntax XXX cons := binary {assoc := right}; ``` where `XXX` is a common keyword. Suggestion by @lukaszcz XXX = declare --------- Co-authored-by: Łukasz Czajka <62751+lukaszcz@users.noreply.github.com> Co-authored-by: Lukasz Czajka <lukasz@heliax.dev>
15 lines
314 B
Plaintext
15 lines
314 B
Plaintext
module Operators;
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syntax fixity add := binary {assoc := left};
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syntax operator + add;
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axiom + : Type → Type → Type;
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plus : Type → Type → Type := (+);
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plus2 : Type → Type → Type → Type
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| a b c := a + b + c;
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plus3 : Type → Type → Type → Type → Type
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| a b c d := (+) (a + b) ((+) c d);
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