Fixes for cppfront (#4076)gh-4280

* Rename cppx_cppfront to cpp2_cppfront
* Add some blurb about the compiler
* Some syntax highlighting
* Better output highlighting
* Some form of line tracking and filtering

1 files changed, 77 insertions, 0 deletions

diff --git a/lib/parsers/asm-parser-cpp.ts b/lib/parsers/asm-parser-cpp.ts
new file mode 100644
index 000000000..dc28a8c27
--- /dev/null
+++ b/lib/parsers/asm-parser-cpp.ts
@@ -0,0 +1,77 @@
+// Copyright (c) 2022, Compiler Explorer Authors
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//     * Redistributions of source code must retain the above copyright notice,
+//       this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above copyright
+//       notice, this list of conditions and the following disclaimer in the
+//       documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+import {ParseFilters} from '../../types/features/filters.interfaces';
+import * as utils from '../utils';
+
+import {IAsmParser} from './asm-parser.interfaces';
+
+type InlineLabel = {name: string; range: {startCol: number; endCol: number}};
+type Source = {file: string | null; line: number};
+
+const lineRe = /^\s*#line\s+(?<line>\d+)\s+"(?<file>[^"]+)"/;
+
+export class AsmParserCpp implements IAsmParser {
+    process(asmResult: string, filters: ParseFilters) {
+        const startTime = process.hrtime.bigint();
+
+        const asm: {
+            text: string;
+            source: Source | null;
+            labels: InlineLabel[];
+        }[] = [];
+
+        let source: Source | null = null;
+        for (const line of utils.splitLines(asmResult)) {
+            let advance = true;
+            const match = line.match(lineRe);
+            if (match && match.groups) {
+                // TODO perhaps we'll need to check the file here at some point in the future.
+                // TODO I've temporarily disabled this as the result is visually too noisy
+                // was:  source = {file: null, line: parseInt(match.groups.line)};
+                source = {file: match.groups.file, line: parseInt(match.groups.line)};
+                if (filters.directives) {
+                    continue;
+                }
+                advance = false;
+            }
+            asm.push({
+                text: line,
+                source: source,
+                labels: [],
+            });
+            if (source && advance) {
+                source = {...source, line: source.line + 1};
+            }
+        }
+
+        const endTime = process.hrtime.bigint();
+        return {
+            asm: asm,
+            labelDefinitions: [],
+            parsingTime: ((endTime - startTime) / BigInt(1000000)).toString(),
+            filteredCount: 0,
+        };
+    }
+}