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https://github.com/carbon-language/carbon-lang.git
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Jon Meow
32f5845e7b
Along with #789 this addresses most of #769 although global_arena is still a TODO (that's widespread and overlaps with other changes so I wanted to do it after these are in).
70 lines
2.7 KiB
C++
70 lines
2.7 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 "executable_semantics/syntax/syntax_helpers.h"
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#include "common/check.h"
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#include "common/ostream.h"
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#include "executable_semantics/common/arena.h"
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#include "executable_semantics/common/tracing_flag.h"
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#include "executable_semantics/interpreter/interpreter.h"
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#include "executable_semantics/interpreter/type_checker.h"
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namespace Carbon {
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// Adds builtins, currently only Print(). Note Print() is experimental, not
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// standardized, but is made available for printing state in tests.
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static void AddIntrinsics(std::list<Ptr<const Declaration>>* fs) {
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SourceLocation loc("<intrinsic>", 0);
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std::vector<TuplePattern::Field> print_fields = {TuplePattern::Field(
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"0", global_arena->New<BindingPattern>(
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loc, "format_str",
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global_arena->New<ExpressionPattern>(
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global_arena->New<StringTypeLiteral>(loc))))};
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auto print_return =
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global_arena->New<Return>(loc,
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global_arena->New<IntrinsicExpression>(
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IntrinsicExpression::IntrinsicKind::Print),
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false);
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auto print = global_arena->New<FunctionDeclaration>(
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global_arena->New<FunctionDefinition>(
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loc, "Print", std::vector<GenericBinding>(),
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global_arena->New<TuplePattern>(loc, print_fields),
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global_arena->New<ExpressionPattern>(
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global_arena->New<TupleLiteral>(loc)),
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/*is_omitted_return_type=*/false, print_return));
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fs->insert(fs->begin(), print);
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}
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void ExecProgram(std::list<Ptr<const Declaration>> fs) {
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AddIntrinsics(&fs);
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if (tracing_output) {
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llvm::outs() << "********** source program **********\n";
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for (const auto decl : fs) {
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llvm::outs() << *decl;
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}
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llvm::outs() << "********** type checking **********\n";
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}
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TypeChecker type_checker;
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TypeChecker::TypeCheckContext p = type_checker.TopLevel(fs);
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TypeEnv top = p.types;
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Env ct_top = p.values;
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std::list<Ptr<const Declaration>> new_decls;
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for (const auto decl : fs) {
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new_decls.push_back(type_checker.MakeTypeChecked(decl, top, ct_top));
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}
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if (tracing_output) {
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llvm::outs() << "\n";
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llvm::outs() << "********** type checking complete **********\n";
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for (const auto decl : new_decls) {
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llvm::outs() << *decl;
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}
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llvm::outs() << "********** starting execution **********\n";
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}
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int result = Interpreter().InterpProgram(new_decls);
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llvm::outs() << "result: " << result << "\n";
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}
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} // namespace Carbon
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