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Track the start of a signature more accurately (#6760)
This change ensures that a function signature always starts with an `IdentifierNameMaybeBeforeSignature` node (renamed from `IdentifierNameBeforeParams`), even in the case of function declarations like `fn F -> T` that have no parameter list. As a consequence, this ensures that we push new entries onto `pattern_block_stack` and `full_pattern_stack` when we start processing the function signature.
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+1
-1
@@ -14,7 +14,7 @@ let x: i32 = tuple.0.1.2;
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'LetIntroducer', text: 'let'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'x'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'x'},
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// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
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// CHECK:STDOUT: {kind: 'LetBindingPattern', text: ':', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'LetInitializer', text: '='},
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@@ -14,7 +14,7 @@ let x: i32 = tuple.0;
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'LetIntroducer', text: 'let'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'x'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'x'},
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// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
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// CHECK:STDOUT: {kind: 'LetBindingPattern', text: ':', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'LetInitializer', text: '='},
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+4
-4
@@ -16,7 +16,7 @@ var (a: (), (b: (), c: ()));
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'y'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'y'},
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// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
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// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
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// CHECK:STDOUT: {kind: 'TupleLiteral', text: ')', subtree_size: 2},
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@@ -32,18 +32,18 @@ var (a: (), (b: (), c: ()));
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// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 15},
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// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
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// CHECK:STDOUT: {kind: 'TuplePatternStart', text: '('},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'a'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'a'},
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// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
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// CHECK:STDOUT: {kind: 'TupleLiteral', text: ')', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 4},
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// CHECK:STDOUT: {kind: 'PatternListComma', text: ','},
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// CHECK:STDOUT: {kind: 'TuplePatternStart', text: '('},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'b'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'b'},
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// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
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// CHECK:STDOUT: {kind: 'TupleLiteral', text: ')', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 4},
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// CHECK:STDOUT: {kind: 'PatternListComma', text: ','},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'c'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'c'},
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// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
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// CHECK:STDOUT: {kind: 'TupleLiteral', text: ')', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 4},
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+1
-1
@@ -14,7 +14,7 @@ var x: (i32, i32) = (1, 2);
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'x'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'x'},
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// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
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// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
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// CHECK:STDOUT: {kind: 'TupleLiteralComma', text: ','},
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