125 lines
3.6 KiB
C++
125 lines
3.6 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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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