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Make the tree structure more explicit in parse dumps (#7591)

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It's hard to track 2-space indent levels across large vertical gaps, and
it can be hard to suppress the instinct to read the dump as if it were
preorder. This change introduces a new dump mode that addresses both
problems by using box-drawing characters to explicitly represent the
parent-child edges of the tree. This new mode is the default, but the
old behavior remains available with
`--parse-dump-format=yaml-postorder`.
This commit is contained in:
Geoff Romer
2026-07-31 16:44:18 +00:00
committed by GitHub
parent 2c91e5f5de
commit 6429c1655c
343 changed files with 11839 additions and 12185 deletions
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toolchain/parse/testdata/array/basic.carbon
Vendored
+15 -16
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@@ -11,19 +11,18 @@
var x: array(i32, 10);
// CHECK:STDOUT: - filename: basic.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'x'},
// CHECK:STDOUT: {kind: 'BindingPatternTypeStart', text: ':'},
// CHECK:STDOUT: {kind: 'ArrayExprKeyword', text: 'array'},
// CHECK:STDOUT: {kind: 'ArrayExprOpenParen', text: '('},
// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
// CHECK:STDOUT: {kind: 'ArrayExprComma', text: ','},
// CHECK:STDOUT: {kind: 'IntLiteral', text: '10'},
// CHECK:STDOUT: {kind: 'ArrayExpr', text: ')', subtree_size: 6},
// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 9},
// CHECK:STDOUT: {kind: 'VariablePattern', text: 'var', subtree_size: 10},
// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 12},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─VariableIntroducer 'var'
// CHECK:STDOUT: │ │ ╭─IdentifierNameNotBeforeSignature 'x'
// CHECK:STDOUT: │ │ ├─BindingPatternTypeStart ':'
// CHECK:STDOUT: │ │ │ ╭─ArrayExprKeyword 'array'
// CHECK:STDOUT: │ │ │ ├─ArrayExprOpenParen '('
// CHECK:STDOUT: │ │ │ ├─IntTypeLiteral 'i32'
// CHECK:STDOUT: │ │ │ ├─ArrayExprComma ','
// CHECK:STDOUT: │ │ │ ├─IntLiteral '10'
// CHECK:STDOUT: │ │ ├─ArrayExpr ')'
// CHECK:STDOUT: │ │ ╭─VarBindingPattern ':'
// CHECK:STDOUT: │ ├─VariablePattern 'var'
// CHECK:STDOUT: ├─VariableDecl ';'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)