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AK: Allow escaping of keys in SourceGenerator

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This allows the opening and closing characters of the SourceGenerator
to be used in the source text to be used for purposes other than keys.
This commit is contained in:
Tim Ledbetter 2024-07-07 19:54:59 +01:00 committed by Andreas Kling
parent fe551d3eff
commit 634f2f655b
Notes: sideshowbarker 2024-07-17 04:57:23 +09:00 
Author: https://github.com/tcl3
Commit: https://github.com/LadybirdBrowser/ladybird/commit/634f2f655b
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/494
Reviewed-by: https://github.com/jamierocks
1 changed files with 22 additions and 4 deletions
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26
AK/SourceGenerator.h
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@ -1,6 +1,7 @@
/*
* Copyright (c) 2020, the SerenityOS developers.
* Copyright (c) 2023, Sam Atkins <atkinssj@serenityos.org>
* Copyright (c) 2024, Tim Ledbetter <timledbetter@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -21,17 +22,19 @@ class SourceGenerator {
public:
using MappingType = HashMap<StringView, String>;
explicit SourceGenerator(StringBuilder& builder, char opening = '@', char closing = '@')
explicit SourceGenerator(StringBuilder& builder, char opening = '@', char closing = '@', char escape = '\\')
: m_builder(builder)
, m_opening(opening)
, m_closing(closing)
, m_escape(escape)
{
}
explicit SourceGenerator(StringBuilder& builder, MappingType&& mapping, char opening = '@', char closing = '@')
explicit SourceGenerator(StringBuilder& builder, MappingType&& mapping, char opening = '@', char closing = '@', char escape = '\\')
: m_builder(builder)
, m_mapping(move(mapping))
, m_opening(opening)
, m_closing(closing)
, m_escape(escape)
{
}
@ -70,7 +73,20 @@ public:
GenericLexer lexer { pattern };
while (!lexer.is_eof()) {
m_builder.append(lexer.consume_until(m_opening));
m_builder.append(lexer.consume_until([&](char ch) { return ch == m_opening || ch == m_escape; }));
if (lexer.consume_specific(m_escape)) {
if (!(lexer.next_is(m_opening) || lexer.next_is(m_escape))) {
if (lexer.is_eof())
warnln("Unexpected EOF while parsing escape sequence on SourceGenerator");
else
warnln("Invalid escape sequence found `{}{}` on SourceGenerator", m_escape, lexer.peek());
VERIFY_NOT_REACHED();
}
m_builder.append(lexer.consume());
continue;
}
if (lexer.consume_specific(m_opening)) {
auto const placeholder = lexer.consume_until(m_closing);
@ -129,7 +145,9 @@ public:
private:
StringBuilder& m_builder;
MappingType m_mapping;
char m_opening, m_closing;
char m_opening { '@' };
char m_closing { '@' };
char m_escape { '\\' };
};
}