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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
Download Patch File Download Diff File Expand all files Collapse all files
toolchain/parse/testdata/while/basic.carbon
Vendored
+31 -32
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@@ -20,35 +20,34 @@ fn F() {
}
// CHECK:STDOUT: - filename: basic.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'F'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'WhileConditionStart', text: '('},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'a'},
// CHECK:STDOUT: {kind: 'WhileCondition', text: ')', subtree_size: 3},
// CHECK:STDOUT: {kind: 'CodeBlockStart', text: '{'},
// CHECK:STDOUT: {kind: 'IfConditionStart', text: '('},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'b'},
// CHECK:STDOUT: {kind: 'IfCondition', text: ')', subtree_size: 3},
// CHECK:STDOUT: {kind: 'CodeBlockStart', text: '{'},
// CHECK:STDOUT: {kind: 'BreakStatementStart', text: 'break'},
// CHECK:STDOUT: {kind: 'BreakStatement', text: ';', subtree_size: 2},
// CHECK:STDOUT: {kind: 'CodeBlock', text: '}', subtree_size: 4},
// CHECK:STDOUT: {kind: 'IfStatement', text: 'if', subtree_size: 8},
// CHECK:STDOUT: {kind: 'IfConditionStart', text: '('},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'c'},
// CHECK:STDOUT: {kind: 'IfCondition', text: ')', subtree_size: 3},
// CHECK:STDOUT: {kind: 'CodeBlockStart', text: '{'},
// CHECK:STDOUT: {kind: 'ContinueStatementStart', text: 'continue'},
// CHECK:STDOUT: {kind: 'ContinueStatement', text: ';', subtree_size: 2},
// CHECK:STDOUT: {kind: 'CodeBlock', text: '}', subtree_size: 4},
// CHECK:STDOUT: {kind: 'IfStatement', text: 'if', subtree_size: 8},
// CHECK:STDOUT: {kind: 'CodeBlock', text: '}', subtree_size: 18},
// CHECK:STDOUT: {kind: 'WhileStatement', text: 'while', subtree_size: 22},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 28},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'F'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─WhileConditionStart '('
// CHECK:STDOUT: │ │ ├─IdentifierNameExpr 'a'
// CHECK:STDOUT: │ │ ╭─WhileCondition ')'
// CHECK:STDOUT: │ │ │ ╭─CodeBlockStart '{'
// CHECK:STDOUT: │ │ │ │ ╭─IfConditionStart '('
// CHECK:STDOUT: │ │ │ │ ├─IdentifierNameExpr 'b'
// CHECK:STDOUT: │ │ │ │ ╭─IfCondition ')'
// CHECK:STDOUT: │ │ │ │ │ ╭─CodeBlockStart '{'
// CHECK:STDOUT: │ │ │ │ │ │ ╭─BreakStatementStart 'break'
// CHECK:STDOUT: │ │ │ │ │ ├─BreakStatement ';'
// CHECK:STDOUT: │ │ │ │ ├─CodeBlock '}'
// CHECK:STDOUT: │ │ │ ├─IfStatement 'if'
// CHECK:STDOUT: │ │ │ │ ╭─IfConditionStart '('
// CHECK:STDOUT: │ │ │ │ ├─IdentifierNameExpr 'c'
// CHECK:STDOUT: │ │ │ │ ╭─IfCondition ')'
// CHECK:STDOUT: │ │ │ │ │ ╭─CodeBlockStart '{'
// CHECK:STDOUT: │ │ │ │ │ │ ╭─ContinueStatementStart 'continue'
// CHECK:STDOUT: │ │ │ │ │ ├─ContinueStatement ';'
// CHECK:STDOUT: │ │ │ │ ├─CodeBlock '}'
// CHECK:STDOUT: │ │ │ ├─IfStatement 'if'
// CHECK:STDOUT: │ │ ├─CodeBlock '}'
// CHECK:STDOUT: │ ├─WhileStatement 'while'
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)