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Add support for 'package' in expressions. (#3445)

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This creates a namespace for `package` scope.

It looks like names of class_decls in namespaces lead to an unexpected
instref. This is already true, as best as I can tell. I'm not sure if
there's a preferred approach to address that, so I've left a TODO for
now.
This commit is contained in:
Jon Ross-Perkins
2023-12-04 21:05:41 +00:00
committed by GitHub
parent 1c4a35c76b
commit 30155dbb72
262 changed files with 721 additions and 129 deletions
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toolchain/parse/testdata/package_expr/basic.carbon
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+24
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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
var x: package.Foo = package.Bar;
// CHECK:STDOUT: - filename: basic.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
// CHECK:STDOUT: {kind: 'Name', text: 'x'},
// CHECK:STDOUT: {kind: 'PackageExpr', text: 'package'},
// CHECK:STDOUT: {kind: 'Name', text: 'Foo'},
// CHECK:STDOUT: {kind: 'MemberAccessExpr', text: '.', subtree_size: 3},
// CHECK:STDOUT: {kind: 'BindingPattern', text: ':', subtree_size: 5},
// CHECK:STDOUT: {kind: 'VariableInitializer', text: '='},
// CHECK:STDOUT: {kind: 'PackageExpr', text: 'package'},
// CHECK:STDOUT: {kind: 'Name', text: 'Bar'},
// CHECK:STDOUT: {kind: 'MemberAccessExpr', text: '.', subtree_size: 3},
// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 11},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
toolchain/parse/testdata/package_expr/fail_in_name.carbon
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+38
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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
// CHECK:STDERR: fail_in_name.carbon:[[@LINE+3]]:5: ERROR: Expected pattern in `var` declaration.
// CHECK:STDERR: var package.val: i32;
// CHECK:STDERR: ^~~~~~~
var package.val: i32;
// CHECK:STDERR: fail_in_name.carbon:[[@LINE+3]]:11: ERROR: `namespace` introducer should be followed by a name.
// CHECK:STDERR: namespace package.NS;
// CHECK:STDERR: ^~~~~~~
namespace package.NS;
// CHECK:STDERR: fail_in_name.carbon:[[@LINE+3]]:7: ERROR: `class` introducer should be followed by a name.
// CHECK:STDERR: class package.C {
// CHECK:STDERR: ^~~~~~~
class package.C {
}
// CHECK:STDOUT: - filename: fail_in_name.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
// CHECK:STDOUT: {kind: 'Name', text: 'package', has_error: yes},
// CHECK:STDOUT: {kind: 'InvalidParse', text: 'package', has_error: yes},
// CHECK:STDOUT: {kind: 'BindingPattern', text: 'package', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 5},
// CHECK:STDOUT: {kind: 'NamespaceStart', text: 'namespace'},
// CHECK:STDOUT: {kind: 'InvalidParse', text: 'package', has_error: yes},
// CHECK:STDOUT: {kind: 'Namespace', text: ';', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'InvalidParse', text: 'package', has_error: yes},
// CHECK:STDOUT: {kind: 'ClassDecl', text: 'class', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]