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carbon-lang/toolchain/parse/testdata/basics/form_literals.carbon
T
Geoff Romer 6429c1655c Make the tree structure more explicit in parse dumps (#7591) 
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`.
2026-07-31 16:44:18 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/parse/testdata/basics/form_literals.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/parse/testdata/basics/form_literals.carbon
// --- basics.carbon
fn F() {
form(ref i32);
form(var T(X, Y));
form(val X.Y);
}
fn VarReturn() ->? form(ref i32);
// --- fail_invalid_form_literal.carbon
fn F() {
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+4]]:7: error: expected `(` after `form` [ExpectedParenAfter]
// CHECK:STDERR: form;
// CHECK:STDERR: ^
// CHECK:STDERR:
form;
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+8]]:8: error: expected `ref`, `var`, or `val` after `form(` [ExpectedCategoryModifier]
// CHECK:STDERR: form();
// CHECK:STDERR: ^
// CHECK:STDERR:
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+4]]:8: error: expected expression [ExpectedExpr]
// CHECK:STDERR: form();
// CHECK:STDERR: ^
// CHECK:STDERR:
form();
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+4]]:8: error: expected `ref`, `var`, or `val` after `form(` [ExpectedCategoryModifier]
// CHECK:STDERR: form(i32);
// CHECK:STDERR: ^~~
// CHECK:STDERR:
form(i32);
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+8]]:8: error: expected `ref`, `var`, or `val` after `form(` [ExpectedCategoryModifier]
// CHECK:STDERR: form(whole lot of nonsense);
// CHECK:STDERR: ^~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+4]]:14: error: unexpected tokens before `)` [ExpectedCloseSymbol]
// CHECK:STDERR: form(whole lot of nonsense);
// CHECK:STDERR: ^~~
// CHECK:STDERR:
form(whole lot of nonsense);
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+4]]:18: error: unexpected tokens before `)` [ExpectedCloseSymbol]
// CHECK:STDERR: form(var whole lot of nonsense);
// CHECK:STDERR: ^~~
// CHECK:STDERR:
form(var whole lot of nonsense);
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+8]]:8: error: expected `(` after `form` [ExpectedParenAfter]
// CHECK:STDERR: form whole lot of nonsense;
// CHECK:STDERR: ^~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+4]]:8: error: expected `;` after expression statement [ExpectedExprSemi]
// CHECK:STDERR: form whole lot of nonsense;
// CHECK:STDERR: ^~~~~
// CHECK:STDERR:
form whole lot of nonsense;
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+8]]:8: error: expected `(` after `form` [ExpectedParenAfter]
// CHECK:STDERR: form var whole lot of nonsense;
// CHECK:STDERR: ^~~
// CHECK:STDERR:
// CHECK:STDERR: fail_invalid_form_literal.carbon:[[@LINE+4]]:8: error: expected `;` after expression statement [ExpectedExprSemi]
// CHECK:STDERR: form var whole lot of nonsense;
// CHECK:STDERR: ^~~
// CHECK:STDERR:
form var whole lot of nonsense;
}
// CHECK:STDOUT: - filename: basics.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'F'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen '('
// CHECK:STDOUT: │ │ │ ╭─IntTypeLiteral 'i32'
// CHECK:STDOUT: │ │ ├─RefPrimitiveForm 'ref'
// CHECK:STDOUT: │ │ ╭─FormLiteral ')'
// CHECK:STDOUT: │ ├─ExprStatement ';'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen '('
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameExpr 'T'
// CHECK:STDOUT: │ │ │ ╭─CallExprStart '('
// CHECK:STDOUT: │ │ │ ├─IdentifierNameExpr 'X'
// CHECK:STDOUT: │ │ │ ├─TupleLiteralComma ','
// CHECK:STDOUT: │ │ │ ├─IdentifierNameExpr 'Y'
// CHECK:STDOUT: │ │ │ ╭─CallExpr ')'
// CHECK:STDOUT: │ │ ├─VarPrimitiveForm 'var'
// CHECK:STDOUT: │ │ ╭─FormLiteral ')'
// CHECK:STDOUT: │ ├─ExprStatement ';'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen '('
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameExpr 'X'
// CHECK:STDOUT: │ │ │ ├─IdentifierNameNotBeforeSignature 'Y'
// CHECK:STDOUT: │ │ │ ╭─MemberAccessExpr '.'
// CHECK:STDOUT: │ │ ├─ValPrimitiveForm 'val'
// CHECK:STDOUT: │ │ ╭─FormLiteral ')'
// CHECK:STDOUT: │ ├─ExprStatement ';'
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'VarReturn'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen '('
// CHECK:STDOUT: │ │ │ ╭─IntTypeLiteral 'i32'
// CHECK:STDOUT: │ │ ├─RefPrimitiveForm 'ref'
// CHECK:STDOUT: │ │ ╭─FormLiteral ')'
// CHECK:STDOUT: │ ├─ReturnForm '->?'
// CHECK:STDOUT: ├─FunctionDecl ';'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_invalid_form_literal.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'F'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen 'form' has_error
// CHECK:STDOUT: │ │ ├─InvalidParse 'form' has_error
// CHECK:STDOUT: │ │ ╭─FormLiteral 'form' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen '('
// CHECK:STDOUT: │ │ │ ╭─InvalidParse ')' has_error
// CHECK:STDOUT: │ │ ├─ValPrimitiveForm 'form' has_error
// CHECK:STDOUT: │ │ ╭─FormLiteral ')'
// CHECK:STDOUT: │ ├─ExprStatement ';'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen '('
// CHECK:STDOUT: │ │ │ ╭─IntTypeLiteral 'i32'
// CHECK:STDOUT: │ │ ├─ValPrimitiveForm 'form' has_error
// CHECK:STDOUT: │ │ ╭─FormLiteral ')'
// CHECK:STDOUT: │ ├─ExprStatement ';'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen '('
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameExpr 'whole'
// CHECK:STDOUT: │ │ ├─ValPrimitiveForm 'form' has_error
// CHECK:STDOUT: │ │ ╭─FormLiteral ')' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen '('
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameExpr 'whole'
// CHECK:STDOUT: │ │ ├─VarPrimitiveForm 'var'
// CHECK:STDOUT: │ │ ╭─FormLiteral ')' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';'
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen 'form' has_error
// CHECK:STDOUT: │ │ ├─InvalidParse 'form' has_error
// CHECK:STDOUT: │ │ ╭─FormLiteral 'form' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: │ │ ╭─FormLiteralKeyword 'form'
// CHECK:STDOUT: │ │ ├─FormLiteralOpenParen 'form' has_error
// CHECK:STDOUT: │ │ ├─InvalidParse 'form' has_error
// CHECK:STDOUT: │ │ ╭─FormLiteral 'form' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
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