132 lines
3.9 KiB
Markdown
132 lines
3.9 KiB
Markdown
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# TODO Items
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-Plan of attack:
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-write a visitor pattern for AST
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-convert AST type to including SourceMap'd wrappers (w/ .into())
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-at the same time, amke sure the visitor pattern "skips over" the SourceMap'd stuff
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so it can just care about AST structure
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- AST : maybe replace the Expression type with "Ascription(TypeName, Box<Expression>) nodes??
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- parser: add a "debug" field to the Parser struct for all debug-related things
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-scala-style html"dfasfsadf${}" string interpolations!
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-fuzz test schala
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*A neat idea for pattern matching optimization would be if you could match on one of several things in a list
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ex:
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if x {
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is (comp, LHSPat, RHSPat) if comp in ["==, "<"] -> ...
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}
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- https://nshipster.com/never/
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-https://cranelift.readthedocs.io/en/latest/?badge=latest<Paste>
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-consult http://gluon-lang.org/book/embedding-api.html
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- if/match playground
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simple if
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`if x == 1.0 { "a" } else { "b" }`
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one comparison multiple targets:
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`if x == { 1.0 -> "a", 2.0 -> "b", else -> "c" }`
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different comparison operators/ method calls:
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`if x { == 1.0 -> "a", eq NaN -> "n", .hella() -> "h", else -> "z" }`
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pattern matching/introducing bindings:
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`if alice { .age < 18 -> "18", is Person("Alice", age) -> "${age}", else -> "none" }`
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pattern matching w/ if-let:
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`if person is Person("Alice", age) { "${age}" } else { "nope" }`
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-https://soc.github.io/languages/unified-condition-syntax syntax:
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`if <cond-expr>" then <then-expr> else <else-expr>`
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`if <half-expr> \n <rest-expr1> then <result1-expr> \n <rest-expr2> then <result-expr2> else <result3-expr>`
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-and rest-exprs (or "targets") can have 'is' for pattern-matching, actually so can a full cond-expr
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UNIFIED IF EXPRESSIONS FINAL WORK:
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basic syntax:
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`if_expr := if discriminator '{' (guard_expr)* '}'`
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`guard_expr := pattern 'then' block_or_expr'`
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`pattern := rhs | is_pattern`
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`is_pattern := 'is' ???`
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`rhs := expression | ???`
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if the only two guard patterns are true and false, then the abbreviated syntax:
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`'if' discriminator 'then' block_or_expr 'else' block_or_expr`
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can replace `'if' discriminator '{' 'true' 'then' block_or_expr; 'false' 'then' block_or_expr '}'`
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- Next priorities: - get ADTs working, get matches working
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- inclusive/exclusive range syntax like .. vs ..=
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- sketch of an idea for the REPL:
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-each compiler pass should be a (procedural?) macro like
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compiler_pass!("parse", dataproducts: ["ast", "parse_tree"], {
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match parsing::parse(INPUT) {
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Ok(
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PASS.add_artifact(
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}
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-should have an Idris-like `cast To From` function
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- REPL:
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- want to be able to do things like `:doc Identifier`, and have the language load up these definitions to the REPL
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* change 'trait' to 'interface'
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-think about idris-related ideas of multiple implementations of a type for an interface (+ vs * impl for monoids, for preorder/inorder/postorder for Foldable)
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* Share state between programming languages
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* idea for Schala - scoped types - be able to define a quick enum type scoped to a function ro something, that only is meant to be used as a quick bespoke interface between two other things
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* another idea, allow:
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type enum {
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type enum MySubVariant {
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SubVariant1, SubVariant2, etc.
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}
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Variant1(MySubVariant),
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Variant2(...),
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}
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* idea for Schala: both currying *and* default arguments!
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ex. fn a(b: Int, c:Int, d:Int = 1) -> Int
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a(1,2) : Int
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a(1,2,d=2): Int
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a(_,1,3) : Int -> Int
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a(1,2, c=_): Int -> Int
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a(_,_,_) : Int -> Int -> Int -> Int
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*Compiler passes architecture
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-ProgrammingLanguageInterface defines a evaluate_in_repl() and evaluate_no_repl() functions
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-these take in a vec of CompilerPasses
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struct CompilerPass {
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name: String,
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run: fn(PrevPass) -> NextPass
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}
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-change "Type...." names in parser.rs to "Anno..." for non-collision with names in typechecking.rs
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-get rid of code pertaining to compilation specifically, have a more generation notion of "execution type"
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