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carbon-lang/toolchain/parse/testdata/operators/fail_precedence_where.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/operators/fail_precedence_where.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/parse/testdata/operators/fail_precedence_where.carbon
// --- fail_and_where.carbon
fn AndWhere() {
// CHECK:STDERR: fail_and_where.carbon:[[@LINE+4]]:14: error: parentheses are required to disambiguate operator precedence [OperatorRequiresParentheses]
// CHECK:STDERR: true and T where .A = B;
// CHECK:STDERR: ^~~~~
// CHECK:STDERR:
true and T where .A = B;
}
// --- fail_where_or.carbon
fn WhereOr() {
// CHECK:STDERR: fail_where_or.carbon:[[@LINE+4]]:22: error: expected `;` after expression statement [ExpectedExprSemi]
// CHECK:STDERR: U where .C impls D or false;
// CHECK:STDERR: ^~
// CHECK:STDERR:
U where .C impls D or false;
}
// --- fail_equals_where.carbon
fn EqualsWhere() {
// CHECK:STDERR: fail_equals_where.carbon:[[@LINE+4]]:10: error: parentheses are required to disambiguate operator precedence [OperatorRequiresParentheses]
// CHECK:STDERR: e == V where .G == f32;
// CHECK:STDERR: ^~~~~
// CHECK:STDERR:
e == V where .G == f32;
}
// --- fail_where_neq.carbon
fn WhereNEq() {
// CHECK:STDERR: fail_where_neq.carbon:[[@LINE+4]]:21: error: expected `;` after expression statement [ExpectedExprSemi]
// CHECK:STDERR: W where .H = bool != i;
// CHECK:STDERR: ^~
// CHECK:STDERR:
W where .H = bool != i;
}
// --- fail_less_requirement.carbon
fn LessRequirement() {
// CHECK:STDERR: fail_less_requirement.carbon:[[@LINE+4]]:14: error: requirement should use `impls`, `=`, or `==` operator [ExpectedRequirementOperator]
// CHECK:STDERR: X where .J < .K;
// CHECK:STDERR: ^
// CHECK:STDERR:
X where .J < .K;
}
// --- fail_as_where.carbon
fn AsWhere() {
// CHECK:STDERR: fail_as_where.carbon:[[@LINE+4]]:10: error: parentheses are required to disambiguate operator precedence [OperatorRequiresParentheses]
// CHECK:STDERR: Y as Z where .L impls M;
// CHECK:STDERR: ^~~~~
// CHECK:STDERR:
Y as Z where .L impls M;
}
// --- fail_where_as.carbon
fn WhereAs() {
// CHECK:STDERR: fail_where_as.carbon:[[@LINE+4]]:21: error: expected `;` after expression statement [ExpectedExprSemi]
// CHECK:STDERR: S where .N == i32 as type;
// CHECK:STDERR: ^~
// CHECK:STDERR:
S where .N == i32 as type;
}
// --- fail_as_in_argument.carbon
fn AsInArgument() {
// CHECK:STDERR: fail_as_in_argument.carbon:[[@LINE+4]]:14: error: requirement should use `impls`, `=`, or `==` operator [ExpectedRequirementOperator]
// CHECK:STDERR: R where .O as type impls P;
// CHECK:STDERR: ^~
// CHECK:STDERR:
R where .O as type impls P;
}
// --- fail_greater_in_argument.carbon
fn GreaterInArgument() {
// CHECK:STDERR: fail_greater_in_argument.carbon:[[@LINE+4]]:15: error: requirement should use `impls`, `=`, or `==` operator [ExpectedRequirementOperator]
// CHECK:STDERR: Q where .AA > .BB impls CC;
// CHECK:STDERR: ^
// CHECK:STDERR:
Q where .AA > .BB impls CC;
}
// CHECK:STDOUT: - filename: fail_and_where.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'AndWhere'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─BoolLiteralTrue 'true'
// CHECK:STDOUT: │ │ ╭─ShortCircuitOperandAnd 'and'
// CHECK:STDOUT: │ │ ├─IdentifierNameExpr 'T'
// CHECK:STDOUT: │ │ ╭─ShortCircuitOperatorAnd 'and'
// CHECK:STDOUT: │ │ ╭─WhereOperand 'where' has_error
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'A'
// CHECK:STDOUT: │ │ │ ╭─DesignatorExpr '.'
// CHECK:STDOUT: │ │ │ ├─IdentifierNameExpr 'B'
// CHECK:STDOUT: │ │ ├─RequirementEqual '='
// CHECK:STDOUT: │ │ ╭─WhereExpr 'where' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_where_or.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'WhereOr'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'U'
// CHECK:STDOUT: │ │ ╭─WhereOperand 'where'
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'C'
// CHECK:STDOUT: │ │ │ ╭─DesignatorExpr '.'
// CHECK:STDOUT: │ │ │ ├─IdentifierNameExpr 'D'
// CHECK:STDOUT: │ │ ├─RequirementImpls 'impls'
// CHECK:STDOUT: │ │ ╭─WhereExpr 'where'
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_equals_where.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'EqualsWhere'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'e'
// CHECK:STDOUT: │ │ ├─IdentifierNameExpr 'V'
// CHECK:STDOUT: │ │ ╭─InfixOperatorEqualEqual '=='
// CHECK:STDOUT: │ │ ╭─WhereOperand 'where' has_error
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'G'
// CHECK:STDOUT: │ │ │ ╭─DesignatorExpr '.'
// CHECK:STDOUT: │ │ │ ├─FloatTypeLiteral 'f32'
// CHECK:STDOUT: │ │ ├─RequirementEqualEqual '=='
// CHECK:STDOUT: │ │ ╭─WhereExpr 'where' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_where_neq.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'WhereNEq'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'W'
// CHECK:STDOUT: │ │ ╭─WhereOperand 'where'
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'H'
// CHECK:STDOUT: │ │ │ ╭─DesignatorExpr '.'
// CHECK:STDOUT: │ │ │ ├─BoolTypeLiteral 'bool'
// CHECK:STDOUT: │ │ ├─RequirementEqual '='
// CHECK:STDOUT: │ │ ╭─WhereExpr 'where'
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_less_requirement.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'LessRequirement'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'X'
// CHECK:STDOUT: │ │ ╭─WhereOperand 'where'
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'J'
// CHECK:STDOUT: │ │ ├─DesignatorExpr '.'
// CHECK:STDOUT: │ │ ╭─WhereExpr 'where' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_as_where.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'AsWhere'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'Y'
// CHECK:STDOUT: │ │ ├─IdentifierNameExpr 'Z'
// CHECK:STDOUT: │ │ ╭─InfixOperatorAs 'as'
// CHECK:STDOUT: │ │ ╭─WhereOperand 'where' has_error
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'L'
// CHECK:STDOUT: │ │ │ ╭─DesignatorExpr '.'
// CHECK:STDOUT: │ │ │ ├─IdentifierNameExpr 'M'
// CHECK:STDOUT: │ │ ├─RequirementImpls 'impls'
// CHECK:STDOUT: │ │ ╭─WhereExpr 'where' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_where_as.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'WhereAs'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'S'
// CHECK:STDOUT: │ │ ╭─WhereOperand 'where'
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'N'
// CHECK:STDOUT: │ │ │ ╭─DesignatorExpr '.'
// CHECK:STDOUT: │ │ │ ├─IntTypeLiteral 'i32'
// CHECK:STDOUT: │ │ ├─RequirementEqualEqual '=='
// CHECK:STDOUT: │ │ ╭─WhereExpr 'where'
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_as_in_argument.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'AsInArgument'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'R'
// CHECK:STDOUT: │ │ ╭─WhereOperand 'where'
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'O'
// CHECK:STDOUT: │ │ ├─DesignatorExpr '.'
// CHECK:STDOUT: │ │ ╭─WhereExpr 'where' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_greater_in_argument.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'GreaterInArgument'
// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT: │ ├─ExplicitParamList ')'
// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'Q'
// CHECK:STDOUT: │ │ ╭─WhereOperand 'where'
// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'AA'
// CHECK:STDOUT: │ │ ├─DesignatorExpr '.'
// CHECK:STDOUT: │ │ ╭─WhereExpr 'where' has_error
// CHECK:STDOUT: │ ├─ExprStatement ';' has_error
// CHECK:STDOUT: ├─FunctionDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
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