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#include <catch2/catch_test_macros.hpp>
#include <iostream>
#include <parser.hpp>
#include <print>
#include <span>
#include <tokenizer.hpp>
#include <willow/Util/Color.h>
using namespace willowc;
using namespace willow::termcolor;
bool tokenizer_test(std::string_view buffer, std::span<const TokenKind> args) {
Tokenizer tokenizer(buffer);
size_t token_index = 0;
while (true) {
Token t = tokenizer.scan();
if (token_index >= args.size())
break;
TokenKind expected = args[token_index++];
if (t.kind != expected) {
size_t line_start = [&] {
size_t ls = t.start;
if (ls > buffer.size())
ls = buffer.size();
for (; ls > 0; ls--) {
if (buffer[ls - 1] == '\n') {
break;
}
}
return ls;
}();
size_t line_end = [&]() {
auto p = buffer.find('\n', t.start);
return (p == std::string_view::npos) ? buffer.size() : p;
}();
std::println(std::cerr);
std::println(std::cerr, "{}FAIL:{} expected '{}', got '{}'{}",
willow::termcolor::TextStyle{AnsiColor::Red, Emphasis::Bold},
TextStyle{AnsiColor::Default, AnsiColor::Default}, expected,
t.kind,
TextStyle{AnsiColor::None, AnsiColor::None, Emphasis::None});
std::println(std::cerr, "{}",
buffer.substr(line_start, line_end - line_start));
for (size_t i = line_start; i < t.start; i++)
std::print(std::cerr, " ");
std::print(std::cerr, "{}", TextStyle{AnsiColor::Red, Emphasis::Bold});
for (size_t i = t.start; i < t.end; i++)
std::print(std::cerr, "^");
std::println();
return false;
}
if (t.kind == willowc::TokenKind::Eof)
break;
}
return true;
}
TEST_CASE("basic code", "[tokenizer]") {
using namespace std::string_literals;
using enum TokenKind;
REQUIRE(tokenizer_test(
R"(
func @add(%a: i32, %b: i32) -> i32 {
%c: i32 = add %a, %b;
// return the sum of %a and %b
return %c;
})",
// clang-format off
std::array{FuncKW, Function, LParen, Variable, Colon, Type, Comma, Variable, Colon, Type, RParen, RArrow, Type, LCurly,
Variable, Colon, Type, Equals, Inst, Variable, Comma, Variable, Semicolon,
Comment,
Inst, Variable, Semicolon,
RCurly, Eof}));
// clang-format on
REQUIRE(tokenizer_test(
R"(
func @slt(%a: i32, %b: i32) -> i32 {
^entry:
%retval: *i32 = alloca i32;
%pred: i1 = lt %a, %b;
br %pred, ^lt, ^ge;
^lt:
store %a, %retval;
jmp ^ret;
^gt:
store %b, %retval;
jmp ^ret;
^ret:
%r: i32 = load %retval;
return %r;
})",
// clang-format off
std::array{
FuncKW, Function, LParen, Variable, Colon, Type, Comma, Variable, Colon, Type, RParen, RArrow, Type, LCurly,
Label, Colon, // ^entry:
Variable, Colon, Star, Type, Equals, Inst, Type, Semicolon, // %retval: *i32 = alloca i32;
Variable, Colon, Type, Equals, Inst, Variable, Comma, Variable, Semicolon, // %pred: i1 = lt %a, %b;
Inst, Variable, Comma, Label, Comma, Label, Semicolon, // br %pred, %lt, %ge;
Label, Colon, // ^lt:
Inst, Variable, Comma, Variable, Semicolon, // store %a, %retval;
Inst, Label, Semicolon, // jmp ^ret;
Label, Colon, // ^gt:
Inst, Variable, Comma, Variable, Semicolon, // store %b, %retval;
Inst, Label, Semicolon, // jmp ^ret;
Label, Colon, // ^ret:
Variable, Colon, Type, Equals, Inst, Variable, Semicolon, // %r: i32 = load %retval;
Inst, Variable, Semicolon, // return %r;
RCurly, Eof
}));
// clang-format on
}
TEST_CASE("constants", "[tokenizer]") {
using namespace std::string_literals;
using enum TokenKind;
REQUIRE(tokenizer_test(
R"(
func @c() -> i32 {
%a: i32 = const 0;
%b: i64 = const -7;
%c: i64 = const 123;
%d: i32 = const 0x2a;
}
)",
// clang-format off
std::array{FuncKW, Function, LParen, RParen, RArrow, Type, LCurly,
Variable, Colon, Type, Equals, Inst, Constant, Semicolon,
Variable, Colon, Type, Equals, Inst, Constant, Semicolon,
Variable, Colon, Type, Equals, Inst, Constant, Semicolon,
Variable, Colon, Type, Equals, Inst, Constant, Semicolon,
RCurly, Eof}));
// clang-format on
}
TEST_CASE("identifiers", "[identifiers]") {
using namespace std::string_literals;
using enum TokenKind;
REQUIRE(tokenizer_test(
R"(
func @-foo.bar_baz-0(%$a0: i32, %_tmp_1: i32) -> i32 {
ret %_tmp_1;
}
)",
// clang-format off
std::array{
FuncKW, Function, LParen, Variable, Colon, Type, Comma, Variable, Colon, Type, RParen, RArrow, Type, LCurly,
Inst, Variable, Semicolon,
RCurly, Eof
}));
// clang-format on
}
TEST_CASE("edge cases", "[tokenizer]") {
using namespace std::string_literals;
using enum TokenKind;
REQUIRE(tokenizer_test(R"()", std::array{Eof}));
REQUIRE(tokenizer_test(R"(@foo // hi!)", std::array{Function, Comment, Eof}));
REQUIRE(tokenizer_test(R"(--5)", std::array{Invalid, Eof}));
REQUIRE(tokenizer_test(R"(/ %foo)", std::array{Invalid, Variable, Eof}));
REQUIRE(tokenizer_test(R"(^:)", std::array{Invalid, Colon, Eof}));
}
TEST_CASE("invalid token recovery", "[tokenizer]") {
using namespace std::string_literals;
using enum TokenKind;
REQUIRE(tokenizer_test(R"(----xyz)", std::array{Invalid, Eof}));
REQUIRE(tokenizer_test(R"(^^foo:)", std::array{Invalid, Label, Colon, Eof}));
REQUIRE(tokenizer_test(R"(%13a %foo)",
std::array{Variable, Inst, Variable, Eof}));
}
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