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Add quoted literal support in the match macro.

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Calvin Rose
2021-11-08 15:33:11 -06:00
parent 7205ee5e0a
commit 425a0fcf07
3 changed files with 16 additions and 0 deletions
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src/boot/boot.janet
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@@ -1685,6 +1685,8 @@
already bound to `<sym>`, rather than matching and rebinding it.
Any other value pattern will only match if it is equal to `x`.
Quoting a pattern with `'` will also treat the value as a literal value to match against.
```
[x & cases]
@@ -1736,6 +1738,10 @@
(array/push x s)
(put b2g pattern @[s]))
# match quoted literal
(and (= t :tuple) (= 2 (length pattern)) (= 'quote (pattern 0)))
(break)
# match data structure template
(or isarr (= t :struct) (= t :table))
(do
@@ -1773,6 +1779,10 @@
# match local binding
(= t :symbol) (break)
# match quoted literal
(and (= t :tuple) (= 2 (length pattern)) (= 'quote (pattern 0)))
(array/push anda ['= s pattern])
# match global unification
(and (= t :tuple) (= 2 (length pattern)) (= '@ (pattern 0)))
(if-let [x (in gun (pattern 1))]