Function validate_searched_case_expression

graphlite/src/ast/validator.rs:1270–1296

Validate searched CASE expressions

(
    searched_case: &SearchedCaseExpression,
    ctx: &mut ValidationContext,
    errors: &mut Vec<ValidationError>,
)

/// Validate searched CASE expressions
fn validate_searched_case_expression(
    searched_case: &SearchedCaseExpression,
    ctx: &mut ValidationContext,
    errors: &mut Vec<ValidationError>,
) {
    // Validate WHEN branches
    for when_branch in &searched_case.when_branches {
        // Validate WHEN condition
        validate_expression(&when_branch.condition, ctx, errors);
        // Validate THEN expression
        validate_expression(&when_branch.then_expression, ctx, errors);
    }

    // Validate ELSE expression if present
    if let Some(else_expr) = &searched_case.else_expression {
        validate_expression(else_expr, ctx, errors);
    }

    // Check that there's at least one WHEN branch
    if searched_case.when_branches.is_empty() {
        errors.push(ValidationError {
            message: "CASE expression must have at least one WHEN branch".to_string(),
            location: Some(crate::ast::Location::default()),
            error_type: ValidationErrorType::Structural,
        });
    }
}

/// Validate PATH constructor expressions
fn validate_path_constructor(