Step 370: Add Common Lisp parser and routing
This commit is contained in:
Bill
598
editor/src/ast/CommonLispParser.h
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598
editor/src/ast/CommonLispParser.h
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#pragma once
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#include "ASTNode.h"
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#include "Module.h"
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#include "Function.h"
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#include "Variable.h"
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#include "Parameter.h"
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#include "Type.h"
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#include "ClassDeclaration.h"
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#include "Statement.h"
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#include "Expression.h"
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#include "AsyncNodes.h"
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#include "PreprocessorNodes.h"
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#include "Annotation.h"
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#include "../ast/Parser.h"
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#include <cctype>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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class CommonLispParser {
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public:
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static std::unique_ptr<Module> parseCommonLisp(const std::string& source) {
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ParseResult result = parseCommonLispWithDiagnostics(source);
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return std::move(result.module);
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}
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static ParseResult parseCommonLispWithDiagnostics(const std::string& source) {
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ParseResult result;
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result.module = std::make_unique<Module>();
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result.module->id = IdGenerator::next("mod");
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result.module->name = "parsed_common_lisp_module";
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result.module->targetLanguage = "common-lisp";
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std::vector<SExpr> forms = parseForms(source, result.diagnostics);
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for (const auto& form : forms) {
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convertTopLevelForm(form, result.module.get());
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}
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return result;
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}
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private:
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struct SExpr {
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bool isList = false;
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std::string atom;
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std::vector<SExpr> list;
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};
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static bool isWhitespace(char c) {
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return c == ' ' || c == '\t' || c == '\r' || c == '\n';
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}
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static bool isDelimiter(char c) {
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return isWhitespace(c) || c == '(' || c == ')' || c == '\'' || c == '`' || c == ';';
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}
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static std::string canonicalHead(const std::string& symbol) {
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size_t pos = symbol.rfind(':');
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if (pos == std::string::npos) return symbol;
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return symbol.substr(pos + 1);
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}
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static bool isInteger(const std::string& s) {
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if (s.empty()) return false;
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size_t i = (s[0] == '-' || s[0] == '+') ? 1 : 0;
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if (i >= s.size()) return false;
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for (; i < s.size(); ++i) {
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if (!std::isdigit(static_cast<unsigned char>(s[i]))) return false;
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}
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return true;
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}
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static bool isFloat(const std::string& s) {
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if (s.empty()) return false;
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bool seenDigit = false;
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bool seenDot = false;
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size_t i = (s[0] == '-' || s[0] == '+') ? 1 : 0;
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if (i >= s.size()) return false;
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for (; i < s.size(); ++i) {
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char c = s[i];
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if (std::isdigit(static_cast<unsigned char>(c))) {
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seenDigit = true;
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} else if (c == '.' && !seenDot) {
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seenDot = true;
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} else {
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return false;
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}
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}
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return seenDigit && seenDot;
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}
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static bool isStringToken(const std::string& s) {
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return s.size() >= 2 && s.front() == '"' && s.back() == '"';
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}
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static bool isEarmuff(const std::string& symbol) {
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return symbol.size() > 2 && symbol.front() == '*' && symbol.back() == '*';
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}
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static PrimitiveType* primitiveType(const std::string& name) {
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return new PrimitiveType(IdGenerator::next("type"), name);
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}
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static ASTNode* mapTypeName(const std::string& tname) {
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std::string t = canonicalHead(tname);
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if (t == "fixnum" || t == "integer") return primitiveType("int");
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if (t == "single-float" || t == "double-float" || t == "float") return primitiveType("float");
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if (t == "string") return primitiveType("string");
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if (t == "t") return primitiveType("any");
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if (t == "nil") return primitiveType("nil");
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return new CustomType(IdGenerator::next("type"), t);
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}
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static void skipWhitespaceAndComments(const std::string& source, size_t& pos) {
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while (pos < source.size()) {
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if (isWhitespace(source[pos])) {
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++pos;
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continue;
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}
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if (source[pos] == ';') {
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while (pos < source.size() && source[pos] != '\n') ++pos;
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continue;
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}
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break;
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}
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}
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static std::string parseStringToken(const std::string& source, size_t& pos,
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std::vector<ParseDiagnostic>& diags) {
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std::string out;
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out.push_back('"');
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++pos;
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bool escaped = false;
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while (pos < source.size()) {
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char c = source[pos++];
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out.push_back(c);
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if (escaped) {
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escaped = false;
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continue;
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}
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if (c == '\\') {
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escaped = true;
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} else if (c == '"') {
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return out;
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}
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}
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diags.push_back({1, 1, "Unterminated string in Common Lisp source", "error"});
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return out;
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}
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static std::string parseAtomToken(const std::string& source, size_t& pos) {
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size_t start = pos;
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while (pos < source.size() && !isDelimiter(source[pos])) ++pos;
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return source.substr(start, pos - start);
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}
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static SExpr makeQuotedForm(const SExpr& value) {
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SExpr quoted;
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quoted.isList = true;
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SExpr quoteSymbol;
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quoteSymbol.atom = "quote";
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quoted.list.push_back(quoteSymbol);
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quoted.list.push_back(value);
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return quoted;
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}
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static SExpr parseSingleForm(const std::string& source, size_t& pos,
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std::vector<ParseDiagnostic>& diags) {
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skipWhitespaceAndComments(source, pos);
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if (pos >= source.size()) return SExpr{};
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if (source[pos] == '(') {
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++pos;
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SExpr list;
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list.isList = true;
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for (;;) {
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skipWhitespaceAndComments(source, pos);
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if (pos >= source.size()) {
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diags.push_back({1, 1, "Unbalanced parentheses in Common Lisp source", "error"});
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return list;
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}
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if (source[pos] == ')') {
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++pos;
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return list;
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}
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list.list.push_back(parseSingleForm(source, pos, diags));
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}
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}
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if (source[pos] == ')') {
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diags.push_back({1, 1, "Unmatched closing parenthesis in Common Lisp source", "error"});
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++pos;
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return SExpr{};
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}
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if (source[pos] == '\'' || source[pos] == '`') {
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++pos;
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SExpr inner = parseSingleForm(source, pos, diags);
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return makeQuotedForm(inner);
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}
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if (source[pos] == '"') {
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SExpr atom;
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atom.atom = parseStringToken(source, pos, diags);
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return atom;
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}
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SExpr atom;
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atom.atom = parseAtomToken(source, pos);
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return atom;
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}
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static std::vector<SExpr> parseForms(const std::string& source,
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std::vector<ParseDiagnostic>& diags) {
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std::vector<SExpr> out;
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size_t pos = 0;
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while (pos < source.size()) {
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skipWhitespaceAndComments(source, pos);
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if (pos >= source.size()) break;
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out.push_back(parseSingleForm(source, pos, diags));
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}
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return out;
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}
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static std::string atomText(const SExpr& expr) {
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return expr.isList ? "" : expr.atom;
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}
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static std::string headSymbol(const SExpr& expr) {
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if (!expr.isList || expr.list.empty() || expr.list[0].isList) return "";
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return canonicalHead(expr.list[0].atom);
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}
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static void appendExpressionStatement(ASTNode* owner, const std::string& role, ASTNode* expr) {
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if (!expr) return;
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auto* stmt = new ExpressionStatement();
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stmt->id = IdGenerator::next("exprstmt");
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stmt->setChild("expression", expr);
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owner->addChild(role, stmt);
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}
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static ASTNode* convertIfExpression(const SExpr& expr) {
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if (expr.list.size() < 3) return nullptr;
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auto* node = new IfStatement();
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node->id = IdGenerator::next("if");
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node->setChild("condition", convertExpression(expr.list[1]));
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appendExpressionStatement(node, "thenBranch", convertExpression(expr.list[2]));
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if (expr.list.size() > 3) {
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appendExpressionStatement(node, "elseBranch", convertExpression(expr.list[3]));
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}
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return node;
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}
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static ASTNode* convertCondExpression(const SExpr& expr) {
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if (expr.list.size() < 2) return nullptr;
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IfStatement* root = nullptr;
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IfStatement* current = nullptr;
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for (size_t i = 1; i < expr.list.size(); ++i) {
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const SExpr& clause = expr.list[i];
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if (!clause.isList || clause.list.empty()) continue;
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auto* node = new IfStatement();
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node->id = IdGenerator::next("if");
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node->setChild("condition", convertExpression(clause.list[0]));
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if (clause.list.size() >= 2) {
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appendExpressionStatement(node, "thenBranch", convertExpression(clause.list[1]));
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}
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if (!root) root = node;
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if (current) current->addChild("elseBranch", node);
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current = node;
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}
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return root;
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}
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static ASTNode* convertLambdaExpression(const SExpr& expr) {
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auto* lambda = new LambdaExpression();
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lambda->id = IdGenerator::next("lambda");
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if (expr.list.size() > 1 && expr.list[1].isList) {
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for (const auto& p : expr.list[1].list) {
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if (p.isList || p.atom.empty()) continue;
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std::string name = p.atom;
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if (!name.empty() && name[0] == '&') continue;
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auto* param = new Parameter(IdGenerator::next("param"), name);
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lambda->addChild("parameters", param);
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}
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}
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for (size_t i = 2; i < expr.list.size(); ++i) {
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appendExpressionStatement(lambda, "body", convertExpression(expr.list[i]));
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}
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return lambda;
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}
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static ASTNode* convertLetExpression(const SExpr& expr) {
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auto* block = new Block();
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block->id = IdGenerator::next("blk");
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if (expr.list.size() > 1 && expr.list[1].isList) {
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for (const auto& binding : expr.list[1].list) {
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if (!binding.isList || binding.list.empty()) continue;
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std::string name = atomText(binding.list[0]);
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if (name.empty()) continue;
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auto* var = new Variable(IdGenerator::next("var"), name);
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if (binding.list.size() > 1) {
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var->setChild("value", convertExpression(binding.list[1]));
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}
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block->addChild("statements", var);
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}
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}
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for (size_t i = 2; i < expr.list.size(); ++i) {
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appendExpressionStatement(block, "statements", convertExpression(expr.list[i]));
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}
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return block;
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}
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static ASTNode* convertLoopForm(const SExpr& expr) {
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auto* loop = new ForLoop();
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loop->id = IdGenerator::next("for");
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std::string head = headSymbol(expr);
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if (head == "dotimes" && expr.list.size() > 1 && expr.list[1].isList && !expr.list[1].list.empty()) {
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loop->iteratorName = atomText(expr.list[1].list[0]);
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if (expr.list[1].list.size() > 1) {
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loop->setChild("iterable", convertExpression(expr.list[1].list[1]));
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}
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} else {
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loop->iteratorName = head;
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}
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size_t start = (head == "dotimes") ? 2 : 1;
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for (size_t i = start; i < expr.list.size(); ++i) {
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appendExpressionStatement(loop, "body", convertExpression(expr.list[i]));
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}
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return loop;
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}
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static void attachQuotedAnnotation(ASTNode* node) {
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if (!node) return;
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auto* meta = new MetaAnnotation();
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meta->id = IdGenerator::next("anno");
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meta->state = "quoted";
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meta->phase = "compile";
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node->addChild("annotations", meta);
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}
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static ASTNode* convertCallLike(const SExpr& expr) {
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if (!expr.isList || expr.list.empty()) return nullptr;
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auto* call = new FunctionCall();
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call->id = IdGenerator::next("call");
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std::string head = headSymbol(expr);
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if (head == "funcall" || head == "apply") {
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if (expr.list.size() > 1) call->functionName = atomText(expr.list[1]);
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for (size_t i = 2; i < expr.list.size(); ++i) {
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ASTNode* arg = convertExpression(expr.list[i]);
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if (arg) call->addChild("arguments", arg);
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}
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return call;
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}
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call->functionName = atomText(expr.list[0]);
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for (size_t i = 1; i < expr.list.size(); ++i) {
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ASTNode* arg = convertExpression(expr.list[i]);
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if (arg) call->addChild("arguments", arg);
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}
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return call;
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}
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static ASTNode* convertValuesExpression(const SExpr& expr) {
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auto* call = new FunctionCall();
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call->id = IdGenerator::next("call");
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call->functionName = "values";
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for (size_t i = 1; i < expr.list.size(); ++i) {
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ASTNode* arg = convertExpression(expr.list[i]);
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if (arg) call->addChild("arguments", arg);
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}
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auto* contract = new ContractAnnotation();
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contract->id = IdGenerator::next("anno");
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contract->returnShape = "multiple-values";
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call->addChild("annotations", contract);
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return call;
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}
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static ASTNode* convertExpression(const SExpr& expr) {
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if (!expr.isList) {
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std::string atom = expr.atom;
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if (atom.empty()) return nullptr;
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if (isInteger(atom)) return new IntegerLiteral(IdGenerator::next("int"), std::stoi(atom));
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if (isFloat(atom)) return new FloatLiteral(IdGenerator::next("flt"), atom);
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if (isStringToken(atom)) return new StringLiteral(IdGenerator::next("str"), atom.substr(1, atom.size() - 2));
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if (atom == "t") return new BooleanLiteral(IdGenerator::next("bool"), true);
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if (atom == "nil") return new BooleanLiteral(IdGenerator::next("bool"), false);
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return new VariableReference(IdGenerator::next("ref"), atom);
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}
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std::string head = headSymbol(expr);
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if (head == "if") return convertIfExpression(expr);
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if (head == "cond") return convertCondExpression(expr);
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if (head == "lambda") return convertLambdaExpression(expr);
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if (head == "let" || head == "let*") return convertLetExpression(expr);
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if (head == "loop" || head == "do" || head == "dotimes") return convertLoopForm(expr);
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if (head == "quote") {
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ASTNode* quotedExpr = (expr.list.size() > 1) ? convertExpression(expr.list[1]) : nullptr;
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if (!quotedExpr) quotedExpr = new VariableReference(IdGenerator::next("ref"), "nil");
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attachQuotedAnnotation(quotedExpr);
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return quotedExpr;
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}
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if (head == "values") return convertValuesExpression(expr);
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return convertCallLike(expr);
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}
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static void parseDeclareTypeForms(
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const std::vector<SExpr>& body,
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std::unordered_map<std::string, std::string>& declaredTypes) {
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for (const auto& form : body) {
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if (!form.isList || headSymbol(form) != "declare") continue;
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for (size_t i = 1; i < form.list.size(); ++i) {
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const SExpr& decl = form.list[i];
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if (!decl.isList || decl.list.size() < 3) continue;
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if (headSymbol(decl) != "type") continue;
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std::string tname = atomText(decl.list[1]);
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for (size_t j = 2; j < decl.list.size(); ++j) {
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std::string var = atomText(decl.list[j]);
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if (!var.empty()) declaredTypes[var] = tname;
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}
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}
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}
|
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}
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static void addDynamicBindingAnnotationIfNeeded(ASTNode* node, const std::string& symbol) {
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||||
if (!isEarmuff(symbol)) return;
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auto* binding = new BindingAnnotation();
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||||
binding->id = IdGenerator::next("anno");
|
||||
binding->time = "dynamic";
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||||
node->addChild("annotations", binding);
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||||
}
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|
||||
static void convertDefun(const SExpr& form, Module* module) {
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if (form.list.size() < 3) return;
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||||
std::string name = atomText(form.list[1]);
|
||||
auto* fn = new Function(IdGenerator::next("fn"), name);
|
||||
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||||
if (form.list[2].isList) {
|
||||
for (const auto& p : form.list[2].list) {
|
||||
if (p.isList || p.atom.empty() || p.atom[0] == '&') continue;
|
||||
auto* param = new Parameter(IdGenerator::next("param"), p.atom);
|
||||
fn->addChild("parameters", param);
|
||||
}
|
||||
}
|
||||
|
||||
std::vector<SExpr> body;
|
||||
for (size_t i = 3; i < form.list.size(); ++i) body.push_back(form.list[i]);
|
||||
|
||||
std::unordered_map<std::string, std::string> declaredTypes;
|
||||
parseDeclareTypeForms(body, declaredTypes);
|
||||
for (ASTNode* p : fn->getChildren("parameters")) {
|
||||
auto* param = static_cast<Parameter*>(p);
|
||||
auto it = declaredTypes.find(param->name);
|
||||
if (it != declaredTypes.end()) {
|
||||
param->setChild("type", mapTypeName(it->second));
|
||||
}
|
||||
}
|
||||
|
||||
for (const auto& expr : body) {
|
||||
if (expr.isList && headSymbol(expr) == "declare") continue;
|
||||
appendExpressionStatement(fn, "body", convertExpression(expr));
|
||||
}
|
||||
module->addChild("functions", fn);
|
||||
}
|
||||
|
||||
static void convertDefmethod(const SExpr& form, Module* module) {
|
||||
if (form.list.size() < 3) return;
|
||||
std::string name = atomText(form.list[1]);
|
||||
auto* method = new MethodDeclaration(IdGenerator::next("method"), name);
|
||||
|
||||
if (form.list[2].isList) {
|
||||
for (const auto& paramForm : form.list[2].list) {
|
||||
if (!paramForm.isList) {
|
||||
std::string pname = atomText(paramForm);
|
||||
if (pname.empty()) continue;
|
||||
auto* p = new Parameter(IdGenerator::next("param"), pname);
|
||||
method->addChild("parameters", p);
|
||||
continue;
|
||||
}
|
||||
if (paramForm.list.empty()) continue;
|
||||
std::string pname = atomText(paramForm.list[0]);
|
||||
if (pname.empty()) continue;
|
||||
|
||||
auto* p = new Parameter(IdGenerator::next("param"), pname);
|
||||
if (paramForm.list.size() > 1) {
|
||||
std::string cls = atomText(paramForm.list[1]);
|
||||
p->setChild("type", new CustomType(IdGenerator::next("type"), cls));
|
||||
if (method->className.empty()) method->className = cls;
|
||||
}
|
||||
method->addChild("parameters", p);
|
||||
}
|
||||
}
|
||||
|
||||
for (size_t i = 3; i < form.list.size(); ++i) {
|
||||
appendExpressionStatement(method, "body", convertExpression(form.list[i]));
|
||||
}
|
||||
module->addChild("functions", method);
|
||||
}
|
||||
|
||||
static void convertDefclass(const SExpr& form, Module* module) {
|
||||
if (form.list.size() < 2) return;
|
||||
auto* cls = new ClassDeclaration(IdGenerator::next("cls"), atomText(form.list[1]));
|
||||
|
||||
if (form.list.size() > 2 && form.list[2].isList) {
|
||||
for (const auto& base : form.list[2].list) {
|
||||
std::string b = atomText(base);
|
||||
if (!b.empty()) cls->addBase(b);
|
||||
}
|
||||
}
|
||||
|
||||
if (form.list.size() > 3 && form.list[3].isList) {
|
||||
for (const auto& slot : form.list[3].list) {
|
||||
if (!slot.isList || slot.list.empty()) continue;
|
||||
std::string fieldName = atomText(slot.list[0]);
|
||||
if (fieldName.empty()) continue;
|
||||
auto* field = new Variable(IdGenerator::next("var"), fieldName);
|
||||
cls->addChild("fields", field);
|
||||
}
|
||||
}
|
||||
|
||||
module->addChild("classes", cls);
|
||||
}
|
||||
|
||||
static void convertDefvar(const SExpr& form, Module* module) {
|
||||
if (form.list.size() < 2) return;
|
||||
std::string name = atomText(form.list[1]);
|
||||
auto* var = new Variable(IdGenerator::next("var"), name);
|
||||
|
||||
addDynamicBindingAnnotationIfNeeded(var, name);
|
||||
if (form.list.size() > 2) {
|
||||
var->setChild("value", convertExpression(form.list[2]));
|
||||
}
|
||||
module->addChild("variables", var);
|
||||
}
|
||||
|
||||
static void convertDefmacro(const SExpr& form, Module* module) {
|
||||
if (form.list.size() < 2) return;
|
||||
auto* macro = new MacroDefinition(IdGenerator::next("mac"), atomText(form.list[1]));
|
||||
macro->isFunctionLike = true;
|
||||
|
||||
if (form.list.size() > 2 && form.list[2].isList) {
|
||||
for (const auto& p : form.list[2].list) {
|
||||
if (!p.isList && !p.atom.empty()) macro->parameters.push_back(p.atom);
|
||||
}
|
||||
}
|
||||
|
||||
std::string body = "(";
|
||||
for (size_t i = 3; i < form.list.size(); ++i) {
|
||||
if (i > 3) body += ' ';
|
||||
body += atomText(form.list[i]).empty() ? "form" : atomText(form.list[i]);
|
||||
}
|
||||
body += ")";
|
||||
macro->body = body;
|
||||
module->addChild("statements", macro);
|
||||
}
|
||||
|
||||
static void convertTopLevelForm(const SExpr& form, Module* module) {
|
||||
if (!form.isList || form.list.empty()) return;
|
||||
std::string head = headSymbol(form);
|
||||
|
||||
if (head == "defun") {
|
||||
convertDefun(form, module);
|
||||
return;
|
||||
}
|
||||
if (head == "defmethod") {
|
||||
convertDefmethod(form, module);
|
||||
return;
|
||||
}
|
||||
if (head == "defclass") {
|
||||
convertDefclass(form, module);
|
||||
return;
|
||||
}
|
||||
if (head == "defvar" || head == "defparameter") {
|
||||
convertDefvar(form, module);
|
||||
return;
|
||||
}
|
||||
if (head == "defmacro") {
|
||||
convertDefmacro(form, module);
|
||||
return;
|
||||
}
|
||||
|
||||
appendExpressionStatement(module, "statements", convertExpression(form));
|
||||
}
|
||||
};
|
||||
@@ -166,3 +166,4 @@ private:
|
||||
#include "ast/CSharpParser.h"
|
||||
#include "ast/CParser.h"
|
||||
#include "ast/WatParser.h"
|
||||
#include "ast/CommonLispParser.h"
|
||||
|
||||
Reference in New Issue
Block a user