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Check types parameter size in init (#1063)

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* Add types size check in code gen

Resolves #932

* Add more useful message for mismatched generics lookup

* Add tests

* Style
This commit is contained in:
Zac Sweers
2020-01-14 01:50:53 -05:00
committed by GitHub
parent cc4b5b3ad2
commit f891c8187b
3 changed files with 57 additions and 7 deletions
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17
kotlin/codegen/src/main/java/com/squareup/moshi/kotlin/codegen/api/AdapterGenerator.kt
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@@ -18,6 +18,7 @@ package com.squareup.moshi.kotlin.codegen.api
import com.squareup.kotlinpoet.ARRAY
import com.squareup.kotlinpoet.AnnotationSpec
import com.squareup.kotlinpoet.CodeBlock
import com.squareup.kotlinpoet.CodeBlock.Companion
import com.squareup.kotlinpoet.FileSpec
import com.squareup.kotlinpoet.FunSpec
import com.squareup.kotlinpoet.INT
@@ -158,6 +159,22 @@ internal class AdapterGenerator(
if (typeVariables.isNotEmpty()) {
result.addTypeVariables(typeVariables.map { it.stripTypeVarVariance() as TypeVariableName })
// require(types.size == 1) {
// "TypeVariable mismatch: Expecting 1 type(s) for generic type variables [T], but received ${types.size} with values $types"
// }
result.addInitializerBlock(CodeBlock.builder()
.beginControlFlow("require(types.size == %L)", typeVariables.size)
.addStatement(
"buildString·{·append(%S).append(%L).append(%S).append(%S).append(%S).append(%L)·}",
"TypeVariable mismatch: Expecting ",
typeVariables.size,
" ${if (typeVariables.size == 1) "type" else "types"} for generic type variables [",
typeVariables.joinToString(", ") { it.name },
"], but received ",
"${typesParam.name}.size"
)
.endControlFlow()
.build())
}
// TODO make this configurable. Right now it just matches the source model