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typecheck: diagnose missing checked function args

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2026-09-01 13:21:54 +00:00
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@@ -132,7 +132,7 @@ SET scores AS MAP OF NUMBER TO MAP
PUT scores KEY "math" VALUE 98
```
`claro typecheck` also has an early function-argument diagnostic foundation. A function can state a parameter expectation with `CHECK TYPE`, and calls with the wrong value type get a friendly error:
`claro typecheck` also has an early function-argument diagnostic foundation. A function can state a parameter expectation with `CHECK TYPE`, and calls with the wrong value type or a missing checked argument get a friendly error:
```claro
TEACH square amount
@@ -145,6 +145,7 @@ DO square "oops"
```text
Type mismatch for function square: parameter amount needs NUMBER, but this argument looks like TEXT.
Function square needs argument amount as NUMBER, but this call does not provide it.
```
For functions with more than one checked parameter, Claro reports each mismatched argument with the parameter name: