131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
/*
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* Serene programming language.
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*
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* Copyright (c) 2019-2021 Sameer Rahmani <lxsameer@gnu.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "serene/exprs/def.h"
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#include "serene/errors/error.h"
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#include "serene/exprs/expression.h"
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#include "serene/exprs/fn.h"
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#include "serene/exprs/list.h"
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#include "serene/exprs/symbol.h"
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#include "serene/exprs/traits.h"
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#include <llvm/Support/Casting.h>
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#include <llvm/Support/ErrorHandling.h>
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#include <llvm/Support/FormatVariadic.h>
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namespace serene {
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namespace exprs {
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ExprType Def::getType() const { return ExprType::Def; };
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std::string Def::toString() const {
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return llvm::formatv("<Def {0} -> {1}>", this->binding,
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this->value->toString());
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}
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MaybeNode Def::analyze(SereneContext &ctx) {
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UNUSED(ctx);
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return EmptyNode;
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};
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bool Def::classof(const Expression *e) {
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return e->getType() == ExprType::Def;
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};
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MaybeNode Def::make(SereneContext &ctx, List *list) {
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// TODO: Add support for docstring as the 3rd argument (4th element)
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if (list->count() != 3) {
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std::string msg = llvm::formatv("Expected 3 got {0}", list->count());
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return makeErrorful<Node>(list->elements[0]->location,
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&errors::DefWrongNumberOfArgs, msg);
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}
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// Make sure that the list starts with a `def`
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Symbol *defSym = llvm::dyn_cast<Symbol>(list->elements[0].get());
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// TODO: Replace this one with a runtime check
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assert((defSym && defSym->name == "def") &&
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"The first element of the list should be a 'def'.");
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// Make sure that the first argument is a Symbol
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Symbol *binding = llvm::dyn_cast<Symbol>(list->elements[1].get());
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if (!binding) {
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return makeErrorful<Node>(list->elements[1]->location,
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&errors::DefExpectSymbol, "");
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}
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// Analyze the value
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MaybeNode value = list->elements[2]->analyze(ctx);
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Node analyzedValue;
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// TODO: To refactor this logic into a generic function
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if (value) {
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// Success value
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auto &valueNode = value.getValue();
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if (valueNode) {
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// A rewrite is necessary
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analyzedValue = valueNode;
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} else {
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// no rewrite
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analyzedValue = list->elements[2];
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}
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} else {
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// Error value
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return value;
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}
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if (analyzedValue->getType() == ExprType::Fn) {
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Fn *tmp = llvm::dyn_cast<Fn>(analyzedValue.get());
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if (!tmp) {
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llvm_unreachable("inconsistent getType for function");
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}
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tmp->setName(binding->name);
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}
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// auto analayzedValuePtr = analyzedValue;
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auto result = ctx.getCurrentNS()->semanticEnv.insert_symbol(binding->name,
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analyzedValue);
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if (result.succeeded()) {
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return makeSuccessfulNode<Def>(list->location, binding->name,
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analyzedValue);
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} else {
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llvm_unreachable("Inserting a value in the semantic env failed!");
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}
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};
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void Def::generateIR(serene::Namespace &ns, mlir::ModuleOp &m) {
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if (value->getType() == ExprType::Fn) {
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value->generateIR(ns, m);
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return;
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}
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m.emitError("Def: not implemented!");
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};
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} // namespace exprs
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} // namespace serene
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