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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/generics/interface/fail_self_param_syntax.carbon
Vendored
+7 -39
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@@ -9,19 +9,10 @@
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'Foo'},
// CHECK:STDOUT: {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'Add'},
// CHECK:STDOUT: {kind: 'ParameterListStart', text: '('},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'b'},
// CHECK:STDOUT: {kind: 'SelfType', text: 'Self'},
// CHECK:STDOUT: {kind: 'PatternBinding', text: ':', subtree_size: 3},
// CHECK:STDOUT: {kind: 'ParameterList', text: ')', subtree_size: 5},
// CHECK:STDOUT: {kind: 'SelfType', text: 'Self'},
// CHECK:STDOUT: {kind: 'ReturnType', text: '->', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDeclaration', text: ';', subtree_size: 10},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'Sub'},
// CHECK:STDOUT: {kind: 'DeducedParameterListStart', text: '['},
// CHECK:STDOUT: {kind: 'DeducedParameterList', text: ']', has_error: yes, subtree_size: 2},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'me'},
// CHECK:STDOUT: {kind: 'DeducedParameterList', text: ']', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'ParameterListStart', text: '('},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'b'},
// CHECK:STDOUT: {kind: 'SelfType', text: 'Self'},
@@ -29,7 +20,7 @@
// CHECK:STDOUT: {kind: 'ParameterList', text: ')', subtree_size: 5},
// CHECK:STDOUT: {kind: 'SelfType', text: 'Self'},
// CHECK:STDOUT: {kind: 'ReturnType', text: '->', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDeclaration', text: ';', subtree_size: 12},
// CHECK:STDOUT: {kind: 'FunctionDeclaration', text: ';', subtree_size: 13},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'Mul'},
// CHECK:STDOUT: {kind: 'DeducedParameterListStart', text: '['},
@@ -42,37 +33,14 @@
// CHECK:STDOUT: {kind: 'SelfType', text: 'Self'},
// CHECK:STDOUT: {kind: 'ReturnType', text: '->', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDeclaration', text: ';', subtree_size: 12},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'Rem'},
// CHECK:STDOUT: {kind: 'DeducedParameterListStart', text: '['},
// CHECK:STDOUT: {kind: 'DeducedParameterList', text: ']', subtree_size: 2},
// CHECK:STDOUT: {kind: 'ParameterListStart', text: '('},
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'b'},
// CHECK:STDOUT: {kind: 'SelfType', text: 'Self'},
// CHECK:STDOUT: {kind: 'PatternBinding', text: ':', subtree_size: 3},
// CHECK:STDOUT: {kind: 'ParameterList', text: ')', subtree_size: 5},
// CHECK:STDOUT: {kind: 'SelfType', text: 'Self'},
// CHECK:STDOUT: {kind: 'ReturnType', text: '->', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDeclaration', text: ';', subtree_size: 12},
// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 50},
// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 29},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
interface Foo {
fn Add(b: Self) -> Self;
// CHECK:STDERR: {{.*}}/toolchain/parser/testdata/generics/interface/fail_self_param_syntax.carbon:[[@LINE+1]]:10: Deduced parameters must be of the form: `<name>: <Type>` or `addr <name>: <Type>`.
interface Foo {
// CHECK:STDERR: {{.*}}/toolchain/parser/testdata/generics/interface/fail_self_param_syntax.carbon:[[@LINE+1]]:13: Expected parameter declaration.
fn Sub[me Self](b: Self) -> Self;
// CHECK:STDERR: {{.*}}/toolchain/parser/testdata/generics/interface/fail_self_param_syntax.carbon:[[@LINE+1]]:10: Deduced parameters must be of the form: `<name>: <Type>` or `addr <name>: <Type>`.
// CHECK:STDERR: {{.*}}/toolchain/parser/testdata/generics/interface/fail_self_param_syntax.carbon:[[@LINE+1]]:10: Expected parameter declaration.
fn Mul[Self](b: Self) -> Self;
// TODO: The recovery token is currently inserted after the `;`:
// ```
// fn Div[me: Self(b: Self) -> Self;]
// ```
// Fix and uncomment this to test error handling.
// fn Div[me: Self(b: Self) -> Self;
// It is fine to have an empty deduced parameter list.
fn Rem[](b: Self) -> Self;
}