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Improve parsing of invalid expressions. (#2726)

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This addresses crashes for infix operator expressions, but the approach should more generally yield balanced parsed trees.
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Jon Ross-Perkins
2023-03-31 20:51:59 -07:00
committed by GitHub
parent 7824e9618c
commit a905cdea30
8 changed files with 74 additions and 13 deletions
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toolchain/parser/testdata/struct/fail_missing_value.carbon
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+4 -3
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@@ -10,13 +10,14 @@
// CHECK:STDOUT: {kind: 'StructLiteralOrStructTypeLiteralStart', text: '{'},
// CHECK:STDOUT: {kind: 'DesignatedName', text: 'a'},
// CHECK:STDOUT: {kind: 'StructFieldDesignator', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'InvalidExpression', text: '}', has_error: yes},
// CHECK:STDOUT: {kind: 'StructFieldUnknown', text: '=', has_error: yes},
// CHECK:STDOUT: {kind: 'StructLiteral', text: '}', subtree_size: 5},
// CHECK:STDOUT: {kind: 'PatternBinding', text: ':', subtree_size: 7},
// CHECK:STDOUT: {kind: 'StructLiteral', text: '}', subtree_size: 6},
// CHECK:STDOUT: {kind: 'PatternBinding', text: ':', subtree_size: 8},
// CHECK:STDOUT: {kind: 'VariableInitializer', text: '='},
// CHECK:STDOUT: {kind: 'StructLiteralOrStructTypeLiteralStart', text: '{'},
// CHECK:STDOUT: {kind: 'StructLiteral', text: '}', subtree_size: 2},
// CHECK:STDOUT: {kind: 'VariableDeclaration', text: ';', subtree_size: 12},
// CHECK:STDOUT: {kind: 'VariableDeclaration', text: ';', subtree_size: 13},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]