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A few more fixes to EBNF

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This commit is contained in:
greg 2019-06-09 01:12:19 -07:00
parent dfbd951aaf
commit e9fd20bfe5
2 changed files with 4 additions and 9 deletions
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2
TODO.md
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@ -15,8 +15,6 @@ print the generated type variable for every subexpression in an expression
-idea: the `type` declaration should have some kind of GADT-like syntax -idea: the `type` declaration should have some kind of GADT-like syntax
-idea: I should make the BNF grammar part of the documentation...
- Idea: if you have a pattern-match where one variant has a variable and the other lacks it - Idea: if you have a pattern-match where one variant has a variable and the other lacks it
instead of treating this as a type error, promote the bound variable to an option type instead of treating this as a type error, promote the bound variable to an option type

11
schala-lang/language/src/parsing.rs
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@ -80,9 +80,9 @@
//! //!
//! ``` //! ```
//! list_expr := "[" (expression, ",")* "]" //! list_expr := "[" (expression, ",")* "]"
//! lambda_expr := "\" lambda_param_list type_anno+ nonempty_func_body //! lambda_expr := "\\" lambda_param_list type_anno+ nonempty_func_body
//! lambda_param_list := formal_param_list | formal_param //! lambda_param_list := formal_param_list | formal_param
//! paren_expr := LParen paren_inner RParen //! paren_expr := "(" paren_inner ")"
//! paren_inner := (expression ",")* //! paren_inner := (expression ",")*
//! identifier_expr := named_struct | IDENTIFIER //! identifier_expr := named_struct | IDENTIFIER
//! ``` //! ```
@ -94,14 +94,11 @@
//! record_block := "{" (record_entry, ",")* | "}" //TODO support anonymus structs, update syntax //! record_block := "{" (record_entry, ",")* | "}" //TODO support anonymus structs, update syntax
//! record_entry := IDENTIFIER ":" expression //! record_entry := IDENTIFIER ":" expression
//! anonymous_struct := TODO //! anonymous_struct := TODO
//! ```
//!
//! A `float_literal` can still be assigned to an int in type-checking
//! ```
//! number_literal := int_literal | float_literal //! number_literal := int_literal | float_literal
//! int_literal = ("0x" | "0b") digits //! int_literal = ("0x" | "0b") digits
//! float_literal := digits ("." digits) //! float_literal := digits ("." digits)
//! digits := (DIGIT_GROUP underscore)+ //! digits := (digit_group underscore*)+
//! digit_group := DIGIT+
//! ``` //! ```
//! //!
//! ### Patterns //! ### Patterns