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Add parsing::Scope

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This commit is contained in:
Sofia 2026-04-15 17:45:14 +03:00
parent 55388bc6e3
commit 5fc58ea1c5
3 changed files with 60 additions and 49 deletions
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6
src/main.cpp
View File

@ -70,12 +70,14 @@ std::optional<CompileOutput> compile(std::string_view in_filename) {
}
// Parse tokens
parsing::Scope parse_scope{};
auto stream = token::TokenStream{ tokens };
std::vector<std::unique_ptr<AST::TopLevelStatement>> statements;
auto statement = parsing::parse_top_level_statement(stream);
auto statement = parsing::parse_top_level_statement(stream, parse_scope);
while (statement.ok()) {
statements.push_back(statement.unwrap());
statement = parsing::parse_top_level_statement(stream);
statement = parsing::parse_top_level_statement(stream, parse_scope);
}
if (stream.peek().type != token::Type::Eof) {
std::cerr << statement.unwrap_err() << std::endl;

94
src/parsing.cpp
View File

@ -5,9 +5,9 @@
namespace parsing {
namespace {
Result<std::unique_ptr<AST::Expression>, std::string> parse_expression(token::TokenStream& stream);
Result<std::unique_ptr<AST::Expression>, std::string> parse_expression(token::TokenStream& stream, Scope& scope);
Result<std::shared_ptr<types::Type>, std::string> parse_type(token::TokenStream& stream) {
Result<std::shared_ptr<types::Type>, std::string> parse_type(token::TokenStream& stream, Scope&) {
token::TokenStream inner{ stream };
try {
auto token = inner.expect(token::Type::Ident);
@ -49,7 +49,7 @@ namespace parsing {
}
}
Result<std::optional<uint32_t>, std::string> parse_array_postfix(token::TokenStream& stream, bool allow_empty) {
Result<std::optional<uint32_t>, std::string> parse_array_postfix(token::TokenStream& stream, bool allow_empty, Scope&) {
token::TokenStream inner{ stream };
try {
std::optional<uint32_t> returned{};
@ -71,7 +71,7 @@ namespace parsing {
}
}
Result<std::unique_ptr<AST::Expression>, std::string> parse_list_initializer(token::TokenStream& stream) {
Result<std::unique_ptr<AST::Expression>, std::string> parse_list_initializer(token::TokenStream& stream, Scope& scope) {
token::TokenStream inner{ stream };
try {
auto before_meta = inner.metadata();
@ -85,7 +85,7 @@ namespace parsing {
if (counter++ > 0) {
inner.expect(token::Type::Symbol, ",");
}
expressions.push_back(parse_expression(inner).unwrap());
expressions.push_back(parse_expression(inner, scope).unwrap());
}
inner.expect(token::Type::Symbol, "}");
@ -105,10 +105,10 @@ namespace parsing {
}
}
Result<std::unique_ptr<AST::Expression>, std::string> parse_plain_expression(token::TokenStream& stream) {
Result<std::unique_ptr<AST::Expression>, std::string> parse_plain_expression(token::TokenStream& stream, Scope& scope) {
token::TokenStream inner{ stream };
try {
if (auto list_init = parse_list_initializer(inner); list_init.ok()) {
if (auto list_init = parse_list_initializer(inner, scope); list_init.ok()) {
stream.m_position = inner.m_position;
return std::unique_ptr<AST::Expression> { list_init.unwrap() };
@ -142,11 +142,11 @@ namespace parsing {
}
}
Result<std::shared_ptr<types::Type>, std::string> parse_cast(token::TokenStream& stream) {
Result<std::shared_ptr<types::Type>, std::string> parse_cast(token::TokenStream& stream, Scope& scope) {
token::TokenStream inner{ stream };
try {
inner.expect(token::Type::Symbol, "(");
auto ty = parse_type(inner).unwrap();
auto ty = parse_type(inner, scope).unwrap();
inner.expect(token::Type::Symbol, ")");
stream.m_position = inner.m_position;
@ -158,14 +158,14 @@ namespace parsing {
}
}
Result<std::unique_ptr<AST::Expression>, std::string> parse_primary_expression(token::TokenStream& stream) {
Result<std::unique_ptr<AST::Expression>, std::string> parse_primary_expression(token::TokenStream& stream, Scope& scope) {
token::TokenStream inner{ stream };
try {
auto before_meta = inner.metadata();
if (auto cast = parse_cast(inner); cast.ok()) {
auto expr = parse_primary_expression(inner).unwrap();
if (auto cast = parse_cast(inner, scope); cast.ok()) {
auto expr = parse_primary_expression(inner, scope).unwrap();
stream.m_position = inner.m_position;
return std::unique_ptr<AST::Expression>{
new AST::CastExpression{
@ -177,14 +177,14 @@ namespace parsing {
}
else if (inner.peek().content == "(") {
inner.next();
auto expr = parse_expression(inner).unwrap();
auto expr = parse_expression(inner, scope).unwrap();
inner.expect(token::Type::Symbol, ")");
stream.m_position = inner.m_position;
return expr;
}
else if (inner.peek().content == "&") {
inner.next();
auto expr = parse_primary_expression(inner).unwrap();
auto expr = parse_primary_expression(inner, scope).unwrap();
stream.m_position = inner.m_position;
return std::unique_ptr<AST::Expression> {
new AST::RefExpression(before_meta + inner.metadata(), std::move(expr))
@ -192,14 +192,14 @@ namespace parsing {
}
else if (inner.peek().content == "*") {
inner.next();
auto expr = parse_primary_expression(inner).unwrap();
auto expr = parse_primary_expression(inner, scope).unwrap();
stream.m_position = inner.m_position;
return std::unique_ptr<AST::Expression> {
new AST::DerefExpression(before_meta + inner.metadata(), std::move(expr))
};
}
auto plain_expr = parse_plain_expression(inner);
auto plain_expr = parse_plain_expression(inner, scope);
while (inner.peek().content == "(" || inner.peek().content == "[") {
if (inner.peek().content == "(") {
inner.next();
@ -210,7 +210,7 @@ namespace parsing {
while (inner.peek().content != ")") {
if (counter++ > 0)
inner.expect(token::Type::Symbol, ",");
args.push_back(parse_expression(inner).unwrap());
args.push_back(parse_expression(inner, scope).unwrap());
}
inner.expect(token::Type::Symbol, ")");
@ -218,7 +218,7 @@ namespace parsing {
auto fn_call = new AST::FunctionCallExpression{ before_meta + inner.metadata(), plain_expr.unwrap(), std::move(args) };
plain_expr = std::unique_ptr<AST::Expression>{ fn_call };
}
else if (auto postfix = parse_array_postfix(inner, false); postfix.ok()) {
else if (auto postfix = parse_array_postfix(inner, false, scope); postfix.ok()) {
auto idx_expr = new AST::IndexAccessExpression{
before_meta + inner.metadata(), plain_expr.unwrap(), *postfix.unwrap() };
plain_expr = std::unique_ptr<AST::Expression>{ idx_expr };
@ -234,7 +234,7 @@ namespace parsing {
}
}
Result<types::BinOp, std::string> parse_binop(token::TokenStream& stream) {
Result<types::BinOp, std::string> parse_binop(token::TokenStream& stream, Scope&) {
token::TokenStream inner{ stream };
try {
auto token = inner.next();
@ -270,32 +270,32 @@ namespace parsing {
}
std::unique_ptr<AST::Expression> parse_rhs(
token::TokenStream& stream, std::unique_ptr<AST::Expression> lhs, int prev_precedence) {
token::TokenStream& stream, std::unique_ptr<AST::Expression> lhs, int prev_precedence, Scope& scope) {
auto before = stream.metadata();
auto binop_res = parse_binop(stream);
auto binop_res = parse_binop(stream, scope);
while (binop_res.ok()) {
auto binop = binop_res.unwrap();
auto rhs = parse_primary_expression(stream).unwrap();
auto rhs = parse_primary_expression(stream, scope).unwrap();
if (types::operator_precedence(binop) > prev_precedence) {
rhs = parse_rhs(stream, std::move(rhs), types::operator_precedence(binop));
rhs = parse_rhs(stream, std::move(rhs), types::operator_precedence(binop), scope);
}
auto binop_expr = new AST::BinaryOperationExpression{ before + stream.metadata(), std::move(lhs), binop, std::move(rhs) };
lhs = std::unique_ptr<AST::Expression>{ binop_expr };
binop_res = parse_binop(stream);
binop_res = parse_binop(stream, scope);
}
return lhs;
}
Result<std::unique_ptr<AST::Expression>, std::string> parse_expression(token::TokenStream& stream) {
Result<std::unique_ptr<AST::Expression>, std::string> parse_expression(token::TokenStream& stream, Scope& scope) {
try {
auto lhs = parse_primary_expression(stream).unwrap();
return std::unique_ptr{ parse_rhs(stream, std::move(lhs), 0) };
auto lhs = parse_primary_expression(stream, scope).unwrap();
return std::unique_ptr{ parse_rhs(stream, std::move(lhs), 0, scope) };
}
catch (std::runtime_error& error) {
return std::string{ error.what() };
@ -304,16 +304,16 @@ namespace parsing {
Result<std::unique_ptr<AST::InitializationStatement>, std::string> parse_init_statement(token::TokenStream& stream) {
Result<std::unique_ptr<AST::InitializationStatement>, std::string> parse_init_statement(token::TokenStream& stream, Scope& scope) {
token::TokenStream inner{ stream };
auto before_meta = inner.metadata();
try {
auto ty = parse_type(inner).unwrap();
auto ty = parse_type(inner, scope).unwrap();
auto name = inner.expect(token::Type::Ident);
auto array_postfix = parse_array_postfix(inner, false);
auto array_postfix = parse_array_postfix(inner, false, scope);
while (array_postfix.ok()) {
auto postfix = array_postfix.unwrap();
if (postfix) {
@ -326,13 +326,13 @@ namespace parsing {
new types::PointerType(ty)
};
}
array_postfix = parse_array_postfix(inner, false);
array_postfix = parse_array_postfix(inner, false, scope);
}
std::optional<std::unique_ptr<AST::Expression>> expr = {};
if (inner.peek().type == token::Type::Symbol && inner.peek().content == "=") {
inner.expect(token::Type::Symbol, "=");
expr = parse_expression(inner).unwrap();
expr = parse_expression(inner, scope).unwrap();
}
inner.expect(token::Type::Symbol, ";");
@ -346,13 +346,13 @@ namespace parsing {
}
}
Result<std::unique_ptr<AST::Statement>, std::string> parse_statement(token::TokenStream& stream) {
Result<std::unique_ptr<AST::Statement>, std::string> parse_statement(token::TokenStream& stream, Scope& scope) {
token::TokenStream inner{ stream };
auto before_meta = inner.metadata();
try {
if (inner.peek().type == token::Type::ReturnKeyword) {
inner.next();
auto expression = parse_expression(inner).unwrap();
auto expression = parse_expression(inner, scope).unwrap();
inner.expect(token::Type::Symbol, ";");
stream.m_position = inner.m_position;
@ -363,14 +363,14 @@ namespace parsing {
else if (inner.peek().type == token::Type::IfKeyword) {
inner.next();
inner.expect(token::Type::Symbol, "(");
auto expression = parse_expression(inner).unwrap();
auto expression = parse_expression(inner, scope).unwrap();
inner.expect(token::Type::Symbol, ")");
auto then_statement = parse_statement(inner).unwrap();
auto then_statement = parse_statement(inner, scope).unwrap();
std::optional<std::unique_ptr<AST::Statement>> else_statement{};
if (inner.peek().type == token::Type::ElseKeyword) {
inner.next();
else_statement = parse_statement(inner).unwrap();
else_statement = parse_statement(inner, scope).unwrap();
}
stream.m_position = inner.m_position;
@ -383,11 +383,11 @@ namespace parsing {
};
return std::unique_ptr<AST::Statement>{ statement };
}
else if (auto init = parse_init_statement(inner); init.ok()) {
else if (auto init = parse_init_statement(inner, scope); init.ok()) {
stream.m_position = inner.m_position;
return std::unique_ptr<AST::Statement>{ init.unwrap() };
}
else if (auto expr = parse_expression(inner); expr.ok()) {
else if (auto expr = parse_expression(inner, scope); expr.ok()) {
stream.m_position = inner.m_position;
stream.expect(token::Type::Symbol, ";");
auto expr_statement = new AST::ExpressionStatement{ before_meta + stream.metadata(), expr.unwrap() };
@ -404,11 +404,11 @@ namespace parsing {
}
}
Result<std::unique_ptr<AST::TopLevelStatement>, std::string> parse_top_level_statement(token::TokenStream& stream) {
Result<std::unique_ptr<AST::TopLevelStatement>, std::string> parse_top_level_statement(token::TokenStream& stream, Scope& scope) {
token::TokenStream inner{ stream };
auto before_meta = inner.metadata();
try {
auto type = parse_type(inner).unwrap();
auto type = parse_type(inner, scope).unwrap();
auto name_token = inner.expect(token::Type::Ident);
inner.expect(token::Type::Symbol, "(");
@ -427,13 +427,13 @@ namespace parsing {
break;
}
auto param_ty = parse_type(inner).unwrap();
auto param_ty = parse_type(inner, scope).unwrap();
std::optional<std::string> param_name{};
if (inner.peek().type == token::Type::Ident) {
param_name = inner.expect(token::Type::Ident).content;
std::cout << inner.peek().formatted() << std::endl;
auto postfix = parse_array_postfix(inner, true);
auto postfix = parse_array_postfix(inner, true, scope);
while (postfix.ok()) {
auto array_postfix = postfix.unwrap();
if (array_postfix) {
@ -446,7 +446,7 @@ namespace parsing {
new types::PointerType(param_ty)
};
}
postfix = parse_array_postfix(inner, true);
postfix = parse_array_postfix(inner, true, scope);
}
}
@ -455,16 +455,18 @@ namespace parsing {
inner.expect(token::Type::Symbol, ")");
auto inner_scope = parsing::Scope{ scope };
std::optional<std::vector<std::unique_ptr<AST::Statement>>> statements{};
if (inner.peek().content == "{") {
inner.expect(token::Type::Symbol, "{");
std::vector<std::unique_ptr<AST::Statement>> statement_list{};
auto statement = parse_statement(inner);
auto statement = parse_statement(inner, inner_scope);
while (statement.ok()) {
statement_list.push_back(statement.unwrap());
statement = parse_statement(inner);
statement = parse_statement(inner, inner_scope);
}
statements = std::optional{ std::move(statement_list) };

9
src/parsing.h
View File

@ -1,12 +1,19 @@
#ifndef PARSING_H
#define PARSING_H
#include <map>
#include "ast.h"
#include "result.h"
#include "tokens.h"
namespace parsing {
Result<std::unique_ptr<AST::TopLevelStatement>, std::string> parse_top_level_statement(token::TokenStream& stream);
struct Scope {
std::map<std::string, std::shared_ptr<types::Type>> structs;
};
Result<std::unique_ptr<AST::TopLevelStatement>, std::string> parse_top_level_statement(
token::TokenStream& stream, Scope& scope);
}
#endif