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JSSpecCompiler: Add infrastructure to run compiler passes on AST

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Dan Klishch 2023-08-18 13:12:20 -04:00 • committed by Andrew Kaster
parent cd8f4aaa7d
commit 198591cc20
6 changed files with 243 additions and 0 deletions
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49
Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/Compiler/GenericASTPass.cpp Normal file
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/*
* Copyright (c) 2023, Dan Klishch <danilklishch@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Compiler/GenericASTPass.h"
#include "AST/AST.h"
#include "Function.h"
namespace JSSpecCompiler {
void RecursiveASTVisitor::run_in_subtree(Tree& tree)
{
NodeSubtreePointer pointer { &tree };
recurse(tree, pointer);
}
void RecursiveASTVisitor::replace_current_node_with(Tree tree)
{
m_current_subtree_pointer->replace_subtree(move(tree));
}
RecursionDecision RecursiveASTVisitor::recurse(Tree root, NodeSubtreePointer& pointer)
{
RecursionDecision decision;
m_current_subtree_pointer = &pointer;
decision = on_entry(root);
if (decision == RecursionDecision::Recurse) {
for (auto& child : root->subtrees()) {
if (recurse(child.get(), child) == RecursionDecision::Break)
return RecursionDecision::Break;
}
}
m_current_subtree_pointer = &pointer;
on_leave(root);
return RecursionDecision::Continue;
}
void GenericASTPass::run()
{
run_in_subtree(m_function->m_ast);
}
}