More playing around with syntax for if

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greg 2019-10-09 02:32:41 -07:00
parent 2ed84de641
commit 24b48551dc

39
TODO.md
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@ -1,7 +1,7 @@
# TODO items
## General code cleanup
-experiment with storing metadata via ItemIds on AST nodes (cf. https://rust-lang.github.io/rustc-guide/hir.html, https://github.com/rust-lang/rust/blob/master/src/librustc/hir/mod.rs )
DONE -experiment with storing metadata via ItemIds on AST nodes (cf. https://rust-lang.github.io/rustc-guide/hir.html, https://github.com/rust-lang/rust/blob/master/src/librustc/hir/mod.rs )
-implement and test open/use statements
-implement field access
- standardize on an error type that isn't String
@ -76,10 +76,43 @@ ex.
-consult http://gluon-lang.org/book/embedding-api.html
## Trying if-syntax again
## Playing around with conditional syntax ideas
//simple if expr
if x == 10 then "a" else "z"
//complex if expr
if x == 10 then {
let a = 1
let b = 2
a + b
} else {
55
}
// different comparison ops
if x {
== 1 then "a"
.isPrime() then "b"
else "c"
}
/* for now disallow `if x == { 1 then ... }`, b/c hard to parse
//simple pattern-matching
if x is Person("Ivan", age) then age else 0
//match-block equivalent
if x {
is Person("Ivan", _) then "Ivan"
is Person(_, age) if age > 13 then "barmitzvah'd"
else "foo"
}
## (OLD) Playing around with conditional syntax ideas
-
- if/match playground