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JSSpecCompiler: Add function call canonicalization pass

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It simplifies ladders of BinaryOperators nodes in the function call
arguments into nice and neat FunctionCall node. Ladders initially appear
since I do not want to complicate expression parser, so it interprets
`f(a, b, c, d)` as `f "function_call_operator" (a, (b, (c, d))))`.
This commit is contained in:
Dan Klishch 2023-08-18 13:12:53 -04:00 • committed by Andrew Kaster
parent 1c4cd34320
commit 72794e7843
4 changed files with 71 additions and 2 deletions
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34
Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/Compiler/FunctionCallCanonicalizationPass.cpp Normal file
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/*
* Copyright (c) 2023, Dan Klishch <danilklishch@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Compiler/FunctionCallCanonicalizationPass.h"
#include "AST/AST.h"
namespace JSSpecCompiler {
RecursionDecision FunctionCallCanonicalizationPass::on_entry(Tree tree)
{
if (auto binary_operation = as<BinaryOperation>(tree); binary_operation) {
if (binary_operation->m_operation == BinaryOperator::FunctionCall) {
Vector<Tree> arguments;
auto current_tree = binary_operation->m_right;
while (true) {
auto argument_tree = as<BinaryOperation>(current_tree);
if (!argument_tree || argument_tree->m_operation != BinaryOperator::Comma)
break;
arguments.append(argument_tree->m_left);
current_tree = argument_tree->m_right;
}
arguments.append(current_tree);
replace_current_node_with(make_ref_counted<FunctionCall>(binary_operation->m_left, move(arguments)));
}
}
return RecursionDecision::Recurse;
}
}