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https://github.com/carbon-language/carbon-lang.git
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Jon Ross-Perkins
acbe6530c3
What this really does is avoids shadowing names, so that we can comfortable have things like `Check::DiagnosticEmitter` or `Check::DiagnosticLoc` without shadowing being a concern. Note, down this path I'm also thinking about: - Renaming misc DiagnosticConsumer/DiagnosticEmitter classes, possibly just to DiagnosticConsumer/DiagnosticEmitter (so `Check::DiagnosticEmitter` instead of `SemIRLocDiagnosticEmitter`). - Dropping `Diagnostic` from `Emitter::DiagnosticBuilder`. - But not for `Check::DiagnosticBuilder`, because `Check::Builder` would be ambiguous. - Renaming diagnostics/diagnostic_* to drop "diagnostic". [Discussion about SemIRLoc -> DiagnosticLoc](https://discord.com/channels/655572317891461132/655578254970716160/1353771570463768698) reminded me of this (in particular the older [Check::DiagnosticBuilder discussion](https://discord.com/channels/655572317891461132/655578254970716160/1344363562608627763)), but I'd only do that rename if there's matching consensus about a path forward where we keep SemIRLoc, and in a way that it's only ever used for diagnostics (the divergence from which is at the root of current LocId discussion). I'm trying to keep that separate from a namespace addition for clarity.
63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "toolchain/parse/parse.h"
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#include "common/check.h"
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#include "toolchain/base/pretty_stack_trace_function.h"
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#include "toolchain/parse/context.h"
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#include "toolchain/parse/handle.h"
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#include "toolchain/parse/node_kind.h"
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namespace Carbon::Parse {
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auto HandleInvalid(Context& context) -> void {
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CARBON_FATAL("The Invalid state shouldn't be on the stack: {0}",
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context.PopState());
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}
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auto Parse(Lex::TokenizedBuffer& tokens, Diagnostics::Consumer& consumer,
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llvm::raw_ostream* vlog_stream) -> Tree {
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// Delegate to the parser.
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Tree tree(tokens);
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Context context(&tree, &tokens, &consumer, vlog_stream);
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PrettyStackTraceFunction context_dumper(
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[&](llvm::raw_ostream& output) { context.PrintForStackDump(output); });
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context.AddLeafNode(NodeKind::FileStart,
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context.ConsumeChecked(Lex::TokenKind::FileStart));
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context.PushState(State::DeclScopeLoop);
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while (!context.state_stack().empty()) {
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switch (context.state_stack().back().state) {
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#define CARBON_PARSE_STATE(Name) \
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case State::Name: \
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Handle##Name(context); \
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break;
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#include "toolchain/parse/state.def"
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}
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}
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context.AddLeafNode(NodeKind::FileEnd, *context.position());
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// Mark the tree as potentially having errors if there were errors coming in
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// from the tokenized buffer or we diagnosed new errors.
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tree.set_has_errors(tokens.has_errors() || context.has_errors());
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if (auto verify = tree.Verify(); !verify.ok()) {
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// TODO: This is temporarily printing to stderr directly during development.
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// If we can, restrict this to a subtree with the error and add it to the
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// stack trace (such as with PrettyStackTraceFunction). Otherwise, switch
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// back to vlog_stream prior to broader distribution so that end users are
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// hopefully comfortable copy-pasting stderr when there are bugs in tree
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// construction.
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tree.Print(llvm::errs());
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CARBON_FATAL("Invalid tree returned by Parse(): {0}", verify.error());
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}
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return tree;
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}
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} // namespace Carbon::Parse
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