mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Zenong Zhang
2f4905bf70
- An introprocedural forward analysis that checks the may-be-formed states on local variables. - Returns compilation error on usage of must-be-unformed variables. - Implemented as a pass of `ASTNode` traversal. - Currently supports detection of: function parameter, return expression and rhs of assign.
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 "explorer/interpreter/exec_program.h"
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#include <variant>
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#include "common/check.h"
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#include "common/ostream.h"
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#include "explorer/common/arena.h"
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#include "explorer/interpreter/interpreter.h"
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#include "explorer/interpreter/resolve_control_flow.h"
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#include "explorer/interpreter/resolve_names.h"
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#include "explorer/interpreter/resolve_unformed.h"
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#include "explorer/interpreter/type_checker.h"
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#include "llvm/Support/Error.h"
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namespace Carbon {
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auto ExecProgram(Nonnull<Arena*> arena, AST ast,
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std::optional<Nonnull<llvm::raw_ostream*>> trace_stream)
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-> ErrorOr<int> {
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if (trace_stream) {
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**trace_stream << "********** source program **********\n";
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for (const auto decl : ast.declarations) {
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**trace_stream << *decl;
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}
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}
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SourceLocation source_loc("<Main()>", 0);
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ast.main_call = arena->New<CallExpression>(
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source_loc, arena->New<IdentifierExpression>(source_loc, "Main"),
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arena->New<TupleLiteral>(source_loc));
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// Although name resolution is currently done once, generic programming
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// (particularly templates) may require more passes.
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if (trace_stream) {
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**trace_stream << "********** resolving names **********\n";
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}
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CARBON_RETURN_IF_ERROR(ResolveNames(ast));
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if (trace_stream) {
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**trace_stream << "********** resolving control flow **********\n";
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}
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CARBON_RETURN_IF_ERROR(ResolveControlFlow(ast));
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if (trace_stream) {
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**trace_stream << "********** type checking **********\n";
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}
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CARBON_RETURN_IF_ERROR(TypeChecker(arena, trace_stream).TypeCheck(ast));
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if (trace_stream) {
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**trace_stream << "********** resolving unformed variables **********\n";
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}
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CARBON_RETURN_IF_ERROR(ResolveUnformed(ast));
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if (trace_stream) {
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**trace_stream << "********** printing declarations **********\n";
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for (const auto decl : ast.declarations) {
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**trace_stream << *decl;
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}
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**trace_stream << "********** starting execution **********\n";
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}
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return InterpProgram(ast, arena, trace_stream);
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}
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} // namespace Carbon
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