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d11ee4b2b1
This implements parsing of the [`observe`](https://docs.carbon-lang.dev/docs/design/generics/details.html#observing-a-type-implements-an-interface) declarations. - Added states and node kinds. - Added node categories. - Added a diagnostic for invalid keywords/operators. - Implemented parser state handlers. - Added structs to `typed_nodes.h`. - Added parser tests.
104 lines
5.2 KiB
Plaintext
104 lines
5.2 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/observe/observe.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/observe/observe.carbon
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// --- base.carbon
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observe A == B == C;
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// --- impls.carbon
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observe T impls I;
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// --- equal_equal_impls.carbon
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observe T == U impls I;
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observe A == B == C == D impls I;
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// --- statement.carbon
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fn F() {
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observe A == B;
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}
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interface I {
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observe A == B;
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}
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// CHECK:STDOUT: - filename: base.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: 'ObserveIntroducer', text: 'observe'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'A'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'B'},
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// CHECK:STDOUT: {kind: 'ObserveEqualEqual', text: '==', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'C'},
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// CHECK:STDOUT: {kind: 'ObserveEqualEqual', text: '==', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'ObserveDecl', text: ';', subtree_size: 7},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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// CHECK:STDOUT: - filename: impls.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: 'ObserveIntroducer', text: 'observe'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'T'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'I'},
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// CHECK:STDOUT: {kind: 'ObserveImpls', text: 'impls', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'ObserveDecl', text: ';', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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// CHECK:STDOUT: - filename: equal_equal_impls.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: 'ObserveIntroducer', text: 'observe'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'T'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'U'},
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// CHECK:STDOUT: {kind: 'ObserveEqualEqual', text: '==', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'I'},
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// CHECK:STDOUT: {kind: 'ObserveImpls', text: 'impls', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'ObserveDecl', text: ';', subtree_size: 7},
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// CHECK:STDOUT: {kind: 'ObserveIntroducer', text: 'observe'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'A'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'B'},
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// CHECK:STDOUT: {kind: 'ObserveEqualEqual', text: '==', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'C'},
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// CHECK:STDOUT: {kind: 'ObserveEqualEqual', text: '==', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'D'},
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// CHECK:STDOUT: {kind: 'ObserveEqualEqual', text: '==', subtree_size: 7},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'I'},
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// CHECK:STDOUT: {kind: 'ObserveImpls', text: 'impls', subtree_size: 9},
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// CHECK:STDOUT: {kind: 'ObserveDecl', text: ';', subtree_size: 11},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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// CHECK:STDOUT: - filename: statement.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: 'FunctionIntroducer', text: 'fn'},
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// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'F'},
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// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
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// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'ObserveIntroducer', text: 'observe'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'A'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'B'},
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// CHECK:STDOUT: {kind: 'ObserveEqualEqual', text: '==', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'ObserveDecl', text: ';', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 11},
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// CHECK:STDOUT: {kind: 'InterfaceIntroducer', text: 'interface'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'I'},
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// CHECK:STDOUT: {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'ObserveIntroducer', text: 'observe'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'A'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'B'},
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// CHECK:STDOUT: {kind: 'ObserveEqualEqual', text: '==', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'ObserveDecl', text: ';', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 9},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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