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Fold deduced pattern parsing into the general pattern parsing. (#2649)

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Depends on #2646 

Right now, deduced parameter handling is very narrow to `self` support. This folds it into pattern handling, which should eventually be a superset of deduced parameter support, so this will avoid more duplication of logic.

Note, this subtly adds handling of multiple deduced parameters, but not generic parameters (`:!`) so it's still not quite right.
This commit is contained in:
Jon Ross-Perkins
2023-03-07 09:27:55 -08:00
committed by GitHub
parent f1c18346b6
commit b35e803a7f
18 changed files with 389 additions and 216 deletions
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toolchain/parser/testdata/function/declaration/deduced_two_suffix_comma.carbon
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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
// RUN: %{carbon-run-parser}
// CHECK:STDOUT: [
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'foo'},
// CHECK:STDOUT: {kind: 'DeducedParameterListStart', text: '['},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'a'},
// CHECK:STDOUT: {kind: 'Literal', text: 'i32'},
// CHECK:STDOUT: {kind: 'PatternBinding', text: ':', subtree_size: 3},
// CHECK:STDOUT: {kind: 'ParameterListComma', text: ','},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'b'},
// CHECK:STDOUT: {kind: 'Literal', text: 'i32'},
// CHECK:STDOUT: {kind: 'PatternBinding', text: ':', subtree_size: 3},
// CHECK:STDOUT: {kind: 'ParameterListComma', text: ','},
// CHECK:STDOUT: {kind: 'DeducedParameterList', text: ']', subtree_size: 10},
// CHECK:STDOUT: {kind: 'ParameterListStart', text: '('},
// CHECK:STDOUT: {kind: 'ParameterList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDeclaration', text: ';', subtree_size: 15},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
fn foo[a: i32, b: i32,]();