Refactor, generics, methods, overloads and more #9

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HEL merged 64 commits from feat/generics into main 2026-06-14 22:13:14 +00:00

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HEL commented 2026-06-14 22:13:03 +00:00

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This PR is a bit messy. It groups many features and fixes including, but not limited to:

• a refactor to split the checker into a proper Midas typer and a Python typer
• generic types, with type variables
• grouping of properties and methods as "members", stored separately in the registry (previously operations)
• function overloads with resolution
• builtin type methods and properties defined in a Midas file (including lists)
• add option to compile command to show type judgements

Some things are not fully implemented / need some tidying, but I want to merge this branch and make new smaller ones before this one gets any more out of hand

This PR is a bit messy. It groups many features and fixes including, but not limited to: - a refactor to split the checker into a proper Midas typer and a Python typer - generic types, with type variables - grouping of properties and methods as "members", stored separately in the registry (previously operations) - function overloads with resolution - builtin type methods and properties defined in a Midas file (including lists) - add option to `compile` command to show type judgements Some things are not fully implemented / need some tidying, but I want to merge this branch and make new smaller ones before this one gets any more out of hand

HEL self-assigned this 2026-06-14 22:13:03 +00:00

HEL added 64 commits 2026-06-14 22:13:03 +00:00

feat(checker): add generic type structure f89722fad8

feat(resolver): handle generics definition 1d00875a8c

refactor(checker): move unfold_type to types.py d51d24f865

refactor(checker): move is_subtype to resolver f9c15abaf4

feat(resolver): handle generic application c4c142482a

feat(checker): add reporter class 111afe4dd4

refactor(checker): restructure around shared registry ... 2ff1f27614

restructure the type checker with a shared TypesRegistry used by MidasTyper and PythonTyper

this commit also relocates some methods in more appropriate places, such as is_subtype and apply_generic (now in TypesRegistry)

refactor(checker): unify builtins definitions 7236749bd5

refactor(resolver): move resolver to checker module 314d4d344b

fix: avoid circular import in builtins.py 098bbc35c5

feat(types): add name to generic type c1f95edc96

feat(checker): WIP add lists 5a6a279eaf

feat(types): WIP add AppliedType 9474a7336a

refactor(checker): extract reduce_types function 32207c3d6f

fix(checker): use reduce_types to infer return type 3581b7600b

fix(resolver): define variable on assignment ... a78aee1639

if a variable is not already defined when an assignment is visited, it is then defined in the current scope

feat(types): add human-friendly string rep ... 4715318913

add `__str__` methods on type structures to improve readability of diagnostics

refactor(types): extract TypeParams ... 380753ca7a

also rename generic type params to type args (when calling a generic)

feat(types): add type params to extend statement f8897dd075

feat: add function type to midas syntax 9fde115016

feat(parser): add extension type and rename properties 3d5f97a0f4

feat(parser): add new ast nodes to parser 900be47d34

feat(checker): adapt typers to members and extension type d9100d8300

fix(checker): improve error for recursive type ref ae0bd75f3b

fix(cli): show diagnostics from different files efea1b29e7

feat(cli): add option to show type judgements 650f60e70c

feat(parser): accept props and methods in extend 42284704de

fix(cli): update highlighter b3665c6462

feat(checker): add members registry 179b88bfed

feat(checker): implement lookup_member method b5de28e291

fix(checker): handle nested generic members 01ff5ca8d5

fix(checker): update binary operation lookup 2e898ab1e9

fix(checker): minor fix when using base type in generic 52981f12f2

fix(checker): give warning on unknown variable 2935c71366

feat(tests): update serializer 50eaafc388

feat(checker): define members on builtin types 6d6bb66c54

fix: extend example of complex types 84a5f41e62

feat(checker): add top type (Any) 4c9cbd9faa

feat(parser): add mixed arguments in midas functions 99924ee6c2

fix(parser): make name required for mixed and keyword args 109c8eb35a

fix(checker): gravefully handle unknown type 6f5d971c66

fix(checker): forward parsing errors as diagnostics eb223c6cb7

fix: remove unused op statement 3ee1161680

fix(checker): handle members on base type df2e609c60

fix(checker): remove in.to_bytes 9a227b6d4c

fix(checker): adapt comparison to lookup method 221b5ca926

tests: update tests 0d0115534b

refactor(checker): replace all accept calls ... 890e2f035a

make visitor accept calls more explicit with type_of(), resolve_type_expr() and process_stmt()

tests: update with newly reported judgements 064702fe13

fix(checker): report unsupported features 1c71badf24

feat(checker): handle unary operations 6577241af9

feat(parser): add subscript expressions c92b6b5c18

feat(checker): type check subscripts 178e24cd02

fix(types): remove unused operation structures 2df0380815

feat(checker): handle overloaded function calls 7598681729

chore: add examples for functions and overloads 46a22797b6

refactor(checker): unify call check for subscript 2a579c06b1

doc(checker): add docstrings to new call checks e1da87eaa0

feat(checker): resolve overloads with subtypes ... 0a35563aaf

try to find the most specific overload if multiple matches are found

tests: update with new subscript and call checks ... 35798e5752

invalid function calls now return UnknownType even if the function has a return type

feat(parser): add slice expression 1eedcff5aa

feat(checker): type check slice expressions 37a464d2bc

fix(checker): handle generic overloads bd0421b5d8

feat(checker): add slice overloads on lists 635bf73531

HEL merged commit 5b062b46e6 into main 2026-06-14 22:13:14 +00:00

HEL deleted branch feat/generics 2026-06-14 22:13:14 +00:00

HEL referenced this issue from a commit 2026-06-14 22:13:15 +00:00

Merge pull request 'Refactor, generics, methods, overloads and more' (#9) from feat/generics into main

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HEL (Louis Heredero)

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Reference: HEL/midas#9