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Move symbol extension functions into
SymbolExt (smithy-lang#2378)
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codegen-core/src/main/kotlin/software/amazon/smithy/rust/codegen/core/smithy/SymbolExt.kt
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| /* | ||
| * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package software.amazon.smithy.rust.codegen.core.smithy | ||
|
|
||
| import software.amazon.smithy.codegen.core.Symbol | ||
| import software.amazon.smithy.model.shapes.Shape | ||
| import software.amazon.smithy.rust.codegen.core.rustlang.RustModule | ||
| import software.amazon.smithy.rust.codegen.core.rustlang.RustType | ||
| import software.amazon.smithy.rust.codegen.core.rustlang.stripOuter | ||
| import software.amazon.smithy.rust.codegen.core.util.orNull | ||
|
|
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| /** Set the symbolLocation for this symbol builder */ | ||
| fun Symbol.Builder.locatedIn(rustModule: RustModule.LeafModule): Symbol.Builder { | ||
| val currentRustType = this.build().rustType() | ||
| check(currentRustType is RustType.Opaque) { | ||
| "Only `RustType.Opaque` can have its namespace updated. Received $currentRustType." | ||
| } | ||
| val newRustType = currentRustType.copy(namespace = rustModule.fullyQualifiedPath()) | ||
| return this.definitionFile(rustModule.definitionFile()) | ||
| .namespace(rustModule.fullyQualifiedPath(), "::") | ||
| .rustType(newRustType) | ||
| .module(rustModule) | ||
| } | ||
|
|
||
| /** | ||
| * Make the Rust type of a symbol optional (hold `Option<T>`) | ||
| * | ||
| * This is idempotent and will have no change if the type is already optional. | ||
| */ | ||
| fun Symbol.makeOptional(): Symbol = | ||
| if (isOptional()) { | ||
| this | ||
| } else { | ||
| val rustType = RustType.Option(this.rustType()) | ||
| Symbol.builder() | ||
| .rustType(rustType) | ||
| .addReference(this) | ||
| .name(rustType.name) | ||
| .build() | ||
| } | ||
|
|
||
| /** | ||
| * Make the Rust type of a symbol boxed (hold `Box<T>`). | ||
| * | ||
| * This is idempotent and will have no change if the type is already boxed. | ||
| */ | ||
| fun Symbol.makeRustBoxed(): Symbol = | ||
| if (isRustBoxed()) { | ||
| this | ||
| } else { | ||
| val rustType = RustType.Box(this.rustType()) | ||
| Symbol.builder() | ||
| .rustType(rustType) | ||
| .addReference(this) | ||
| .name(rustType.name) | ||
| .build() | ||
| } | ||
|
|
||
| /** | ||
| * Make the Rust type of a symbol wrapped in `MaybeConstrained`. (hold `MaybeConstrained<T>`). | ||
| * | ||
| * This is idempotent and will have no change if the type is already `MaybeConstrained<T>`. | ||
| */ | ||
| fun Symbol.makeMaybeConstrained(): Symbol = | ||
| if (this.rustType() is RustType.MaybeConstrained) { | ||
| this | ||
| } else { | ||
| val rustType = RustType.MaybeConstrained(this.rustType()) | ||
| Symbol.builder() | ||
| .rustType(rustType) | ||
| .addReference(this) | ||
| .name(rustType.name) | ||
| .build() | ||
| } | ||
|
|
||
| /** | ||
| * Map the [RustType] of a symbol with [f]. | ||
| * | ||
| * WARNING: This function does not update any symbol references (e.g., `symbol.addReference()`) on the | ||
| * returned symbol. You will have to add those yourself if your logic relies on them. | ||
| **/ | ||
| fun Symbol.mapRustType(f: (RustType) -> RustType): Symbol { | ||
| val newType = f(this.rustType()) | ||
| return Symbol.builder().rustType(newType) | ||
| .name(newType.name) | ||
| .build() | ||
| } | ||
|
|
||
| /** | ||
| * Type representing the default value for a given type (e.g. for Strings, this is `""`). | ||
| */ | ||
| sealed class Default { | ||
| /** | ||
| * This symbol has no default value. If the symbol is not optional, this will error during builder construction | ||
| */ | ||
| object NoDefault : Default() | ||
|
|
||
| /** | ||
| * This symbol should use the Rust `std::default::Default` when unset | ||
| */ | ||
| object RustDefault : Default() | ||
| } | ||
|
|
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| /** | ||
| * Returns true when it's valid to use the default/0 value for [this] symbol during construction. | ||
| */ | ||
| fun Symbol.canUseDefault(): Boolean = this.defaultValue() != Default.NoDefault | ||
|
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| /** | ||
| * True when [this] is will be represented by Option<T> in Rust | ||
| */ | ||
| fun Symbol.isOptional(): Boolean = when (this.rustType()) { | ||
| is RustType.Option -> true | ||
| else -> false | ||
| } | ||
|
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| fun Symbol.isRustBoxed(): Boolean = rustType().stripOuter<RustType.Option>() is RustType.Box | ||
|
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| private const val RUST_TYPE_KEY = "rusttype" | ||
| private const val SHAPE_KEY = "shape" | ||
| private const val RUST_MODULE_KEY = "rustmodule" | ||
| private const val RENAMED_FROM_KEY = "renamedfrom" | ||
| private const val SYMBOL_DEFAULT = "symboldefault" | ||
|
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| // Symbols should _always_ be created with a Rust type & shape attached | ||
| fun Symbol.rustType(): RustType = this.expectProperty(RUST_TYPE_KEY, RustType::class.java) | ||
| fun Symbol.Builder.rustType(rustType: RustType): Symbol.Builder = this.putProperty(RUST_TYPE_KEY, rustType) | ||
| fun Symbol.shape(): Shape = this.expectProperty(SHAPE_KEY, Shape::class.java) | ||
| fun Symbol.Builder.shape(shape: Shape?): Symbol.Builder = this.putProperty(SHAPE_KEY, shape) | ||
| fun Symbol.module(): RustModule.LeafModule = this.expectProperty(RUST_MODULE_KEY, RustModule.LeafModule::class.java) | ||
| fun Symbol.Builder.module(module: RustModule.LeafModule): Symbol.Builder = this.putProperty(RUST_MODULE_KEY, module) | ||
| fun Symbol.renamedFrom(): String? = this.getProperty(RENAMED_FROM_KEY, String::class.java).orNull() | ||
| fun Symbol.Builder.renamedFrom(name: String): Symbol.Builder = this.putProperty(RENAMED_FROM_KEY, name) | ||
| fun Symbol.defaultValue(): Default = this.getProperty(SYMBOL_DEFAULT, Default::class.java).orElse(Default.NoDefault) | ||
| fun Symbol.Builder.setDefault(default: Default): Symbol.Builder = this.putProperty(SYMBOL_DEFAULT, default) |
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