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Michael Kohl 馃嚘馃嚬馃嚬馃嚟
Michael Kohl 馃嚘馃嚬馃嚬馃嚟
@citizen428@chaos.social  路  activity timestamp 6 days ago
A screenshot of a color-coded desugaring of the following use expression: use x <- some_fun(42) x * x The desugared form is some_fun(42, fn(x) { x * x }) In both cases the x is light green (variable binding), 42 is light blue (argument), some_fun is yellow (function name) and the expression "x * x" is purple (callback body). There's also a textual description: How it works: The use expression takes everything after it and wraps it in an anonymous function fn(x) {... }, which is then passed as the final argument to the function on the right-hand side of <-. This eliminates callback nesting without adding language complexity!
A screenshot of a color-coded desugaring of the following use expression: use x <- some_fun(42) x * x The desugared form is some_fun(42, fn(x) { x * x }) In both cases the x is light green (variable binding), 42 is light blue (argument), some_fun is yellow (function name) and the expression "x * x" is purple (callback body). There's also a textual description: How it works: The use expression takes everything after it and wraps it in an anonymous function fn(x) {... }, which is then passed as the final argument to the function on the right-hand side of <-. This eliminates callback nesting without adding language complexity!
A screenshot of a color-coded desugaring of the following use expression: use x <- some_fun(42) x * x The desugared form is some_fun(42, fn(x) { x * x }) In both cases the x is light green (variable binding), 42 is light blue (argument), some_fun is yellow (function name) and the expression "x * x" is purple (callback body). There's also a textual description: How it works: The use expression takes everything after it and wraps it in an anonymous function fn(x) {... }, which is then passed as the final argument to the function on the right-hand side of <-. This eliminates callback nesting without adding language complexity!