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carbon-lang/toolchain/parse/testdata/operators/fail_precedence_where.carbon
T
Geoff Romer 4a0cf6c1fb Track the start of a signature more accurately (#6760) 
This change ensures that a function signature always starts with an
`IdentifierNameMaybeBeforeSignature` node (renamed from
`IdentifierNameBeforeParams`), even in the case of function declarations
like `fn F -> T` that have no parameter list. As a consequence, this
ensures that we push new entries onto `pattern_block_stack` and
`full_pattern_stack` when we start processing the function signature.
2026-02-23 22:46:03 +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: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'AndWhere'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'BoolLiteralTrue', text: 'true'},
// CHECK:STDOUT: {kind: 'ShortCircuitOperandAnd', text: 'and', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'T'},
// CHECK:STDOUT: {kind: 'ShortCircuitOperatorAnd', text: 'and', subtree_size: 4},
// CHECK:STDOUT: {kind: 'WhereOperand', text: 'where', has_error: yes, subtree_size: 5},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'A'},
// CHECK:STDOUT: {kind: 'DesignatorExpr', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'B'},
// CHECK:STDOUT: {kind: 'RequirementEqual', text: '=', subtree_size: 4},
// CHECK:STDOUT: {kind: 'WhereExpr', text: 'where', has_error: yes, subtree_size: 10},
// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', has_error: yes, subtree_size: 11},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 17},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_where_or.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'WhereOr'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'U'},
// CHECK:STDOUT: {kind: 'WhereOperand', text: 'where', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'C'},
// CHECK:STDOUT: {kind: 'DesignatorExpr', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'D'},
// CHECK:STDOUT: {kind: 'RequirementImpls', text: 'impls', subtree_size: 4},
// CHECK:STDOUT: {kind: 'WhereExpr', text: 'where', subtree_size: 7},
// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', has_error: yes, subtree_size: 8},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 14},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_equals_where.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'EqualsWhere'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'e'},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'V'},
// CHECK:STDOUT: {kind: 'InfixOperatorEqualEqual', text: '==', subtree_size: 3},
// CHECK:STDOUT: {kind: 'WhereOperand', text: 'where', has_error: yes, subtree_size: 4},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'G'},
// CHECK:STDOUT: {kind: 'DesignatorExpr', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FloatTypeLiteral', text: 'f32'},
// CHECK:STDOUT: {kind: 'RequirementEqualEqual', text: '==', subtree_size: 4},
// CHECK:STDOUT: {kind: 'WhereExpr', text: 'where', has_error: yes, subtree_size: 9},
// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', has_error: yes, subtree_size: 10},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 16},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_where_neq.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'WhereNEq'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'W'},
// CHECK:STDOUT: {kind: 'WhereOperand', text: 'where', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'H'},
// CHECK:STDOUT: {kind: 'DesignatorExpr', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'BoolTypeLiteral', text: 'bool'},
// CHECK:STDOUT: {kind: 'RequirementEqual', text: '=', subtree_size: 4},
// CHECK:STDOUT: {kind: 'WhereExpr', text: 'where', subtree_size: 7},
// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', has_error: yes, subtree_size: 8},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 14},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_less_requirement.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'LessRequirement'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'X'},
// CHECK:STDOUT: {kind: 'WhereOperand', text: 'where', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'J'},
// CHECK:STDOUT: {kind: 'DesignatorExpr', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'WhereExpr', text: 'where', has_error: yes, subtree_size: 5},
// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', has_error: yes, subtree_size: 6},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 12},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_as_where.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'AsWhere'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'Y'},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'Z'},
// CHECK:STDOUT: {kind: 'InfixOperatorAs', text: 'as', subtree_size: 3},
// CHECK:STDOUT: {kind: 'WhereOperand', text: 'where', has_error: yes, subtree_size: 4},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'L'},
// CHECK:STDOUT: {kind: 'DesignatorExpr', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'M'},
// CHECK:STDOUT: {kind: 'RequirementImpls', text: 'impls', subtree_size: 4},
// CHECK:STDOUT: {kind: 'WhereExpr', text: 'where', has_error: yes, subtree_size: 9},
// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', has_error: yes, subtree_size: 10},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 16},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_where_as.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'WhereAs'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'S'},
// CHECK:STDOUT: {kind: 'WhereOperand', text: 'where', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'N'},
// CHECK:STDOUT: {kind: 'DesignatorExpr', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
// CHECK:STDOUT: {kind: 'RequirementEqualEqual', text: '==', subtree_size: 4},
// CHECK:STDOUT: {kind: 'WhereExpr', text: 'where', subtree_size: 7},
// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', has_error: yes, subtree_size: 8},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 14},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_as_in_argument.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'AsInArgument'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'R'},
// CHECK:STDOUT: {kind: 'WhereOperand', text: 'where', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'O'},
// CHECK:STDOUT: {kind: 'DesignatorExpr', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'WhereExpr', text: 'where', has_error: yes, subtree_size: 5},
// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', has_error: yes, subtree_size: 6},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 12},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_greater_in_argument.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'GreaterInArgument'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'Q'},
// CHECK:STDOUT: {kind: 'WhereOperand', text: 'where', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'AA'},
// CHECK:STDOUT: {kind: 'DesignatorExpr', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'WhereExpr', text: 'where', has_error: yes, subtree_size: 5},
// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', has_error: yes, subtree_size: 6},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 12},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
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