Update docs and CHANGELOG

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 ### Added
 - Compiler warnings for the follwing: shadowing, negative spends, division by zero, unused functions, unused includes, unused stateful annotations, unused variables, unused parameters, unused user-defined type, dead return value.
+- The pipe operator |>
+  ```
+  [1, 2, 3] |> List.first |> Option.is_some  // Option.is_some(List.first([1, 2, 3]))
+  ```
 ### Changed
 - Error messages have been restructured (less newlines) to provide more unified errors. Also `pp_oneline/1` has been added.
 ### Removed

docs/sophia_syntax.md

@@ -234,6 +234,7 @@ Path ::= Id                 // Record field
 
 BinOp ::= '||' | '&&' | '<' | '>' | '=<' | '>=' | '==' | '!='
         | '::' | '++' | '+' | '-' | '*' | '/' | 'mod' | '^'
+        | '|>'
 UnOp  ::= '-' | '!'
 ```
 
@@ -245,6 +246,7 @@ UnOp  ::= '-' | '!'
 | `!` `&&` `\|\|` | logical operators
 | `==` `!=` `<` `>` `=<` `>=` | comparison operators
 | `::` `++` | list operators
+| `\|>` | functional operators
 
 ## Operator precendences
 
@@ -261,3 +263,4 @@ In order of highest to lowest precedence.
 | `<` `>` `=<` `>=` `==` `!=` | none
 | `&&` | right
 | `\|\|` | right
+| `\|>` | left