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compiler, runtime: Support Formatted Error Messages

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Make it possible to output formatted error messages using a
flexible API that includes an ability to specify styles and
formatters.

Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
This commit is contained in:
Will Hawkins
2026-05-04 22:24:28 -04:00
parent 783aac26c7
commit 7a36ca32dd
8 changed files with 227 additions and 17 deletions
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Sources/Common/Error.swift
+16 -9
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@@ -16,8 +16,8 @@
// along with this program. If not, see <https://www.gnu.org/licenses/>.
public struct Error: Errorable, Equatable, CustomStringConvertible {
public func format() -> String {
return self.description
public func format(_ formatter: any Formattable) -> String {
return self._msg
}
public func msg() -> String {
@@ -40,11 +40,10 @@ public struct Error: Errorable, Equatable, CustomStringConvertible {
}
public struct ErrorWithLocation: Errorable, Equatable, CustomStringConvertible {
let startFormat: String = "\u{1B}[31;1;4m"
let endFormat: String = "\u{1B}[0m"
public func format() -> String {
return startFormat + "\(self.location)" + endFormat + ": \(self._msg)"
public func format(_ formatter: any Formattable) -> String {
let bold_red = Style(StyleColor.Red, [StyleFormat.Bold])
let formatted_location = formatter.formatWithStyle(self.location.description, bold_red)
return formatted_location + ": " + self._msg
}
public func msg() -> String {
@@ -70,8 +69,10 @@ public struct ErrorWithLocation: Errorable, Equatable, CustomStringConvertible {
}
public struct Errors: Errorable, CustomStringConvertible {
public func format() -> String {
return self.description
public func format(_ formatter: any Formattable) -> String {
self.errors.map() { error in
error.format(formatter)
}.joined(separator: "\n")
}
public func msg() -> String {
@@ -103,6 +104,12 @@ public struct ErrorWithLabel: Errorable {
let label: String
let error: any Errorable
public func format(_ formatter: any Formattable) -> String {
let green = Style(StyleColor.Green)
let formatted_label = formatter.formatWithStyle(self.label, green)
return formatted_label + self.error.format(formatter)
}
public init(_ label: String, _ error: any Errorable) {
self.label = label
self.error = error