PureYAML/Sources/Parsing/ParseError.swift
Mihaela M 234e0382e6 refactor(parsing): remove three unreachable ParseError cases
emptyDocument, expectedMappingKey, and tabIndentation were never thrown
anywhere in the parser. Empty and comment-only documents parse to null,
the mapping-key path throws unexpectedToken with an "expected mapping
key" message, and tabs in indentation are reported by the validation
layer's PreflightScanner rather than the parser. Drop the dead cases and
their switch arms and description test assertions. No reachable behavior
changes; the PropertyMutation.tabIndentation test mutation is unrelated
and untouched.
2026-06-26 08:37:53 +02:00

149 lines
6.6 KiB
Swift

public extension PureYAML.Parsing {
/// Parser error with source line information when available.
enum ParseError: Swift.Error, Equatable, Sendable, CustomStringConvertible {
case unexpectedIndentation(line: Int)
case mixedCollectionStyles(line: Int)
case expectedAnchorName(line: Int)
case expectedAliasName(line: Int)
case expectedNode(line: Int, column: Int)
case expectedScalarKey(line: Int, column: Int)
case incompatibleYAMLDirective(line: Int)
case invalidTaggedScalar(tag: String, value: String, line: Int, column: Int)
case invalidMergeValue(line: Int, column: Int)
case unterminatedTag(line: Int)
case unterminatedQuotedString(line: Int)
case unsupportedDirective(name: String, line: Int)
case unsupportedMultiDocumentStream(line: Int)
case undefinedAlias(anchor: String, line: Int, column: Int)
case unexpectedEvent(expected: String, actual: String, line: Int, column: Int)
case unexpectedToken(expected: String, actual: String, line: Int, column: Int)
case nestingTooDeep(line: Int, column: Int)
public var description: String {
switch self {
case let .unexpectedIndentation(line):
"unexpected indentation at line \(line)"
case let .mixedCollectionStyles(line):
"mapping and sequence entries are mixed at line \(line)"
case let .expectedAnchorName(line):
"expected an anchor name at line \(line)"
case let .expectedAliasName(line):
"expected an alias name at line \(line)"
case let .expectedNode(line, column):
"expected a YAML node at line \(line), column \(column)"
case let .expectedScalarKey(line, column):
"expected a scalar mapping key at line \(line), column \(column)"
case let .incompatibleYAMLDirective(line):
"incompatible YAML directive at line \(line)"
case let .invalidTaggedScalar(tag, value, line, column):
"invalid scalar '\(value)' for tag '\(tag)' at line \(line), column \(column)"
case let .invalidMergeValue(line, column):
"expected merge value to be a mapping or sequence of mappings at line \(line), column \(column)"
case let .unterminatedTag(line):
"unterminated tag at line \(line)"
case let .unterminatedQuotedString(line):
"unterminated quoted string at line \(line)"
case let .unsupportedDirective(name, line):
"unsupported directive '\(name)' at line \(line)"
case let .unsupportedMultiDocumentStream(line):
"multi-document streams are not supported at line \(line)"
case let .undefinedAlias(anchor, line, column):
"undefined alias '\(anchor)' at line \(line), column \(column)"
case let .unexpectedEvent(expected, actual, line, column):
"expected \(expected) at line \(line), column \(column), found \(actual)"
case let .unexpectedToken(expected, actual, line, column):
"expected \(expected) at line \(line), column \(column), found \(actual)"
case let .nestingTooDeep(line, column):
"nesting is too deep at line \(line), column \(column)"
}
}
public var diagnosticCode: String {
switch self {
case .unexpectedIndentation:
"unexpectedIndentation"
case .mixedCollectionStyles:
"mixedCollectionStyles"
case .expectedAnchorName:
"expectedAnchorName"
case .expectedAliasName:
"expectedAliasName"
case .expectedNode:
"expectedNode"
case .expectedScalarKey:
"expectedScalarKey"
case .incompatibleYAMLDirective:
"incompatibleYAMLDirective"
case .invalidTaggedScalar:
"invalidTaggedScalar"
case .invalidMergeValue:
"invalidMergeValue"
case .unterminatedTag:
"unterminatedTag"
case .unterminatedQuotedString:
"unterminatedQuotedString"
case .unsupportedDirective:
"unsupportedDirective"
case .unsupportedMultiDocumentStream:
"unsupportedMultiDocumentStream"
case .undefinedAlias:
"undefinedAlias"
case .unexpectedEvent:
"unexpectedEvent"
case .unexpectedToken:
"unexpectedToken"
case .nestingTooDeep:
"nestingTooDeep"
}
}
public var sourceLine: Int? {
switch self {
case let .unexpectedIndentation(line),
let .mixedCollectionStyles(line),
let .expectedAnchorName(line),
let .expectedAliasName(line),
let .incompatibleYAMLDirective(line),
let .unterminatedTag(line),
let .unterminatedQuotedString(line),
let .unsupportedDirective(_, line),
let .unsupportedMultiDocumentStream(line):
line
case let .expectedNode(line, _),
let .expectedScalarKey(line, _),
let .invalidTaggedScalar(_, _, line, _),
let .invalidMergeValue(line, _),
let .undefinedAlias(_, line, _),
let .unexpectedEvent(_, _, line, _),
let .unexpectedToken(_, _, line, _),
let .nestingTooDeep(line, _):
line
}
}
public var sourceColumn: Int? {
switch self {
case .unexpectedIndentation,
.mixedCollectionStyles,
.expectedAnchorName,
.expectedAliasName,
.incompatibleYAMLDirective,
.unterminatedTag,
.unterminatedQuotedString,
.unsupportedDirective,
.unsupportedMultiDocumentStream:
nil
case let .expectedNode(_, column),
let .expectedScalarKey(_, column),
let .invalidTaggedScalar(_, _, _, column),
let .invalidMergeValue(_, column),
let .undefinedAlias(_, _, column),
let .unexpectedEvent(_, _, _, column),
let .unexpectedToken(_, _, _, column),
let .nestingTooDeep(_, column):
column
}
}
}
}