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MalachScript
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Implements namespace statement.

This commit is contained in:
Deukhoofd 2020-10-09 11:54:43 +02:00
parent 2fb1b68ead
commit 43f080cc48
Signed by: Deukhoofd
GPG Key ID: F63E044490819F6F
6 changed files with 69 additions and 32 deletions
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4
src/Parser/Lexer/Lexer.hpp
View File

@ -3,7 +3,7 @@
#include <string_view>
#include "../../Diagnostics/Diagnostics.hpp"
#include "../../Utils/MemoryAllocator.hpp"
#include "../../Utils/MemoryPool.hpp"
#include "LexToken.hpp"
namespace MalachScript::Parser {
@ -22,7 +22,7 @@ namespace MalachScript::Parser {
size_t _scriptLength;
Diagnostics::Diagnostics* _diagnostics;
Utils::MemoryAllocator<2048, 1024> _allocator;
Utils::MemoryPool<2048, 1024> _allocator;
inline char8_t Consume() {
if (++_position >= _scriptLength) {

33
src/Parser/Parser.cpp
View File

@ -14,7 +14,9 @@
}
namespace MalachScript::Parser {
ParsedScriptStatement* Parser::Parse() {
const ParsedScriptStatement* Parser::Parse() { return ParseScript(); }
const ParsedScriptStatement* Parser::ParseScript() {
std::vector<const ParsedStatement*> statements;
statements.reserve(32);
size_t current = 0;
@ -26,7 +28,10 @@ namespace MalachScript::Parser {
break;
}
const ParsedStatement* statement;
if (ParseClass(statement)) {
auto result = ParseClass(statement) || ParseNamespace(statement);
if (!result) {
// TODO: Log error
continue;
}
statements.push_back(statement);
current++;
@ -123,16 +128,28 @@ namespace MalachScript::Parser {
PROGRESS_TOKEN(_currentToken);
Identifier defineTo;
if (!ParseIdentifier(defineTo, _currentToken, encounteredErrors)) {
LogError(Diagnostics::DiagnosticType::UnexpectedToken, _currentToken->GetSpan());
}
ParseIdentifier(defineTo, _currentToken, encounteredErrors);
PROGRESS_TOKEN(_currentToken);
EXPECT_TOKEN(_currentToken, SemicolonSymbol);
PROGRESS_TOKEN(_currentToken);
if (_currentToken->GetKind() != LexTokenKind::SemicolonSymbol) {
LogError(Diagnostics::DiagnosticType::UnexpectedToken, _currentToken->GetSpan());
}
out = new ParsedTypeDefStatement(TextSpan(start, _currentToken->GetSpan().GetEnd()), defineTo, defineFrom);
return true;
}
bool Parser::ParseNamespace(const ParsedStatement*& out) {
if (_currentToken->GetKind() != LexTokenKind::NamespaceKeyword) {
return false;
}
auto start = _currentToken->GetSpan().GetStart();
PROGRESS_TOKEN(_currentToken);
Identifier identifier;
bool encounteredErrors = false;
ParseIdentifier(identifier, _currentToken, encounteredErrors);
auto script = ParseScript();
auto end = _currentToken->GetSpan().GetEnd();
PROGRESS_TOKEN(_currentToken);
out = new ParsedNamespaceStatement(TextSpan(start, end), identifier, script);
return true;
}
bool Parser::ParseVirtProp([[maybe_unused]] const ParsedStatement*& out) { return false; }
bool Parser::ParseFunc([[maybe_unused]] const ParsedStatement*& out) { return false; }
bool Parser::ParseVar([[maybe_unused]] const ParsedStatement*& out) { return false; }

4
src/Parser/Parser.hpp
View File

@ -9,7 +9,7 @@ namespace MalachScript::Parser {
public:
Parser(std::u8string_view scriptName, const LexToken* firstToken, Diagnostics::Diagnostics* diagnostics)
: _scriptName(scriptName), _diagnostics(diagnostics), _currentToken(firstToken) {}
ParsedScriptStatement* Parse();
const ParsedScriptStatement* Parse();
private:
std::u8string_view _scriptName;
@ -20,8 +20,10 @@ namespace MalachScript::Parser {
_diagnostics->LogError(type, _scriptName, span);
}
const ParsedScriptStatement* ParseScript();
bool ParseClass(const ParsedStatement*& out);
bool ParseTypeDef(const ParsedStatement*& out);
bool ParseNamespace(const ParsedStatement*& out);
bool ParseVirtProp(const ParsedStatement*& out);
bool ParseFunc(const ParsedStatement*& out);
bool ParseVar(const ParsedStatement*& out);

17
src/Parser/Statements/ParsedStatement.hpp
View File

@ -59,8 +59,21 @@ namespace MalachScript::Parser {
ParsedTypeDefStatement(TextSpan span, const Identifier& defineFrom, const Identifier& defineTo)
: ParsedStatementImpl<ParsedStatementKind::TypeDef>(span), _defineFrom(defineFrom), _defineTo(defineTo) {}
inline const Identifier& GetDefineFrom() const noexcept { return _defineFrom; }
inline const Identifier& GetDefineTo() const noexcept { return _defineTo; }
[[nodiscard]] inline const Identifier& GetDefineFrom() const noexcept { return _defineFrom; }
[[nodiscard]] inline const Identifier& GetDefineTo() const noexcept { return _defineTo; }
};
class ParsedNamespaceStatement : public ParsedStatementImpl<ParsedStatementKind::Namespace> {
Identifier _identifier;
const ParsedScriptStatement* _parsedScript;
public:
ParsedNamespaceStatement(TextSpan span, const Identifier& identifier, const ParsedScriptStatement* script)
: ParsedStatementImpl<ParsedStatementKind::Namespace>(span), _identifier(identifier),
_parsedScript(script) {}
[[nodiscard]] inline const Identifier& GetIdentifier() const noexcept { return _identifier; }
[[nodiscard]] inline const ParsedScriptStatement* GetScript() const noexcept { return _parsedScript; }
};
}

3
src/Parser/Statements/ParsedStatementKind.hpp
View File

@ -6,7 +6,8 @@ namespace MalachScript::Parser {
Unknown,
Script,
Class,
TypeDef
TypeDef,
Namespace
};
}

34
src/Utils/MemoryAllocator.hpp → src/Utils/MemoryPool.hpp
View File

@ -1,5 +1,5 @@
#ifndef MALACHSCRIPT_MEMORYALLOCATOR_HPP
#define MALACHSCRIPT_MEMORYALLOCATOR_HPP
#ifndef MALACHSCRIPT_MEMORYPOOL_HPP
#define MALACHSCRIPT_MEMORYPOOL_HPP
#include <cstddef>
#include <cstdint>
@ -7,13 +7,9 @@
namespace MalachScript::Utils {
template <size_t initialSize, size_t steps>
class MemoryAllocator {
size_t _offset;
size_t _capacity;
uint8_t* _memory = nullptr;
class MemoryPool {
public:
MemoryAllocator() : _offset(0), _capacity(initialSize) {
MemoryPool() : _offset(0), _capacity(initialSize) {
auto *ptr = malloc(_capacity);
if (ptr == nullptr) {
throw std::logic_error("Out of memory.");
@ -21,12 +17,25 @@ namespace MalachScript::Utils {
_memory = static_cast<uint8_t*>(ptr);
}
~MemoryAllocator(){
~MemoryPool(){
free(_memory);
}
template <class T, class... parameters> T* Create(parameters... args){
if (_offset + sizeof(T) >= _capacity) {
IncreaseStep();
}
auto* element = new (_memory + _offset) T(args...);
_offset += sizeof(T);
return element;
}
private:
size_t _offset;
size_t _capacity;
uint8_t* _memory = nullptr;
void IncreaseStep(){
_capacity += steps;
auto newPtr = realloc(_memory, _capacity);
if (newPtr == nullptr) {
@ -34,12 +43,7 @@ namespace MalachScript::Utils {
}
_memory = static_cast<uint8_t*>(newPtr);
}
uint8_t* ptr = _memory + _offset;
T* element = new (ptr) T(args...);
_offset += sizeof(T);
return element;
}
};
}
#endif // MALACHSCRIPT_MEMORYALLOCATOR_HPP
#endif // MALACHSCRIPT_MEMORYPOOL_HPP