mirror of
https://github.com/carbon-language/carbon-lang.git
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Dana JansensandJon Ross-Perkins
4b0e2b03b6
We add a virtual node (`CompileTimeBindingPatternStart`) as the first child of `CompileTimeBindingPattern` which holds the identifier underneath it, so that it is checked just before the type expression of the `CompileTimeBindingPattern`. When we reach this virtual node during check, we add `.Self` as a name in the current scope, and when we reach `CompileTimeBindingPattern` we remove it from scope, which ensures it's present during only the checking of the type expression for the compile time pattern. At the moment the `.Self` has a different type (it's a `TypeType`) than other `.Self` in the facet type (which are a single `FacetType`), but the intention is to immediately substitute it out of the facet type entirely, replacing it with a reference to the compile time binding (a `BindSymbolicName`) itself. A TODO has been added for this. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
54 lines
3.3 KiB
Plaintext
54 lines
3.3 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/parse/testdata/generics/impl/forall.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/parse/testdata/generics/impl/forall.carbon
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impl forall [T:! type] T as Interface;
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impl forall [T:! type, U:! Interface] U as Interface(T) {
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}
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// CHECK:STDOUT: - filename: forall.carbon
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'ImplIntroducer', text: 'impl'},
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// CHECK:STDOUT: {kind: 'Forall', text: 'forall'},
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// CHECK:STDOUT: {kind: 'ImplicitParamListStart', text: '['},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'T'},
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// CHECK:STDOUT: {kind: 'CompileTimeBindingPatternStart', text: ':!', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'TypeTypeLiteral', text: 'type'},
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// CHECK:STDOUT: {kind: 'CompileTimeBindingPattern', text: ':!', subtree_size: 4},
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// CHECK:STDOUT: {kind: 'ImplicitParamList', text: ']', subtree_size: 6},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'T'},
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// CHECK:STDOUT: {kind: 'TypeImplAs', text: 'as', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'Interface'},
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// CHECK:STDOUT: {kind: 'ImplDecl', text: ';', subtree_size: 12},
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// CHECK:STDOUT: {kind: 'ImplIntroducer', text: 'impl'},
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// CHECK:STDOUT: {kind: 'Forall', text: 'forall'},
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// CHECK:STDOUT: {kind: 'ImplicitParamListStart', text: '['},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'T'},
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// CHECK:STDOUT: {kind: 'CompileTimeBindingPatternStart', text: ':!', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'TypeTypeLiteral', text: 'type'},
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// CHECK:STDOUT: {kind: 'CompileTimeBindingPattern', text: ':!', subtree_size: 4},
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// CHECK:STDOUT: {kind: 'PatternListComma', text: ','},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'U'},
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// CHECK:STDOUT: {kind: 'CompileTimeBindingPatternStart', text: ':!', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'Interface'},
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// CHECK:STDOUT: {kind: 'CompileTimeBindingPattern', text: ':!', subtree_size: 4},
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// CHECK:STDOUT: {kind: 'ImplicitParamList', text: ']', subtree_size: 11},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'U'},
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// CHECK:STDOUT: {kind: 'TypeImplAs', text: 'as', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'Interface'},
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// CHECK:STDOUT: {kind: 'CallExprStart', text: '(', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'T'},
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// CHECK:STDOUT: {kind: 'CallExpr', text: ')', subtree_size: 4},
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// CHECK:STDOUT: {kind: 'ImplDefinitionStart', text: '{', subtree_size: 20},
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// CHECK:STDOUT: {kind: 'ImplDefinition', text: '}', subtree_size: 21},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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