Исправляем ошибки в синтаксисе и добавляем вложенные ИФ

This commit is contained in:
2022-09-03 21:32:39 +03:00
parent 80607c593b
commit a010859c06
2 changed files with 42 additions and 38 deletions

View File

@@ -47,16 +47,16 @@ class IoTScenario {
/// identifierexpr
/// ::= identifier
/// ::= identifier '(' expression* ')'
ExprAST *ParseIdentifierExpr(String *IDNames);
ExprAST *ParseIdentifierExpr(String *IDNames, bool callFromCondition);
/// numberexpr ::= number
ExprAST *ParseNumberExpr();
/// parenexpr ::= '(' expression ')'
ExprAST *ParseParenExpr();
ExprAST *ParseParenExpr(String *IDNames, bool callFromCondition);
/// bracketsexpr ::= '{' expression '}'
ExprAST *ParseBracketsExpr();
ExprAST *ParseBracketsExpr(String *IDNames, bool callFromCondition);
/// quotesexpr ::= '"' expression '"'
ExprAST *ParseQuotesExpr();
@@ -68,16 +68,16 @@ class IoTScenario {
/// ::= identifierexpr
/// ::= numberexpr
/// ::= parenexpr
ExprAST *ParsePrimary(String *IDNames);
ExprAST *ParsePrimary(String *IDNames, bool callFromCondition);
/// binoprhs
/// ::= ('+' primary)*
ExprAST *ParseBinOpRHS(int ExprPrec, ExprAST *LHS, String *IDNames);
ExprAST *ParseBinOpRHS(int ExprPrec, ExprAST *LHS, String *IDNames, bool callFromCondition);
/// expression
/// ::= primary binoprhs
///
ExprAST *ParseExpression(String *IDNames);
ExprAST *ParseExpression(String *IDNames, bool callFromCondition);
int getLastChar();
fs::File file;

View File

@@ -728,7 +728,7 @@ ExprAST *IoTScenario::Error(const char *Str) {
/// identifierexpr
/// ::= identifier
/// ::= identifier '(' expression* ')'
ExprAST *IoTScenario::ParseIdentifierExpr(String *IDNames) {
ExprAST *IoTScenario::ParseIdentifierExpr(String *IDNames, bool callFromCondition) {
String IdName = IdentifierStr;
String Cmd = "";
IoTItem *tmpItem = findIoTItem(IdName);
@@ -754,7 +754,7 @@ ExprAST *IoTScenario::ParseIdentifierExpr(String *IDNames) {
std::vector<ExprAST *> Args;
if (CurTok != ')') {
while (1) {
ExprAST *Arg = ParseExpression(IDNames);
ExprAST *Arg = ParseExpression(IDNames, callFromCondition);
if (!Arg) return nullptr;
Args.push_back(Arg);
@@ -783,9 +783,9 @@ ExprAST *IoTScenario::ParseNumberExpr() {
}
/// parenexpr ::= '(' expression ')'
ExprAST *IoTScenario::ParseParenExpr() {
ExprAST *IoTScenario::ParseParenExpr(String *IDNames, bool callFromCondition) {
getNextToken(); // получаем (.
ExprAST *V = ParseExpression(nullptr);
ExprAST *V = ParseExpression(IDNames, callFromCondition);
if (!V) return nullptr;
if (CurTok != ')')
@@ -795,28 +795,31 @@ ExprAST *IoTScenario::ParseParenExpr() {
}
/// bracketsexpr ::= '{' expression '}'
ExprAST *IoTScenario::ParseBracketsExpr() {
ExprAST *IoTScenario::ParseBracketsExpr(String *IDNames, bool callFromCondition) {
getNextToken(); // получаем {.
std::vector<ExprAST *> bracketsList;
if (CurTok != '}') {
while (1) {
ExprAST *Expr = ParseExpression(nullptr);
while (CurTok != '}') {
ExprAST *Expr = ParseExpression(IDNames, callFromCondition);
if (!Expr) return nullptr;
bracketsList.push_back(Expr);
//if (CurTok == '}') break;
if (CurTok != ';')
return Error("Expected ';' in operation list");
int ttok = getNextToken();
if (!ttok) {
Error("Expected '}'");
break;
}
Serial.printf("ParseBracketsExpr CurTok = %d \n", CurTok);
if (CurTok == '}') break;
//if (CurTok != ';')
// return Error("Expected ';' in operation list");
//int ttok = getNextToken();
if (CurTok == tok_eof) {
return Error("Expected '}'");
}
}
}
//getNextToken(); // получаем }.
getNextToken(); // получаем }.
return new BracketsExprAST(bracketsList);
}
@@ -833,14 +836,14 @@ ExprAST *IoTScenario::ParseIfExpr(String *IDNames) {
getNextToken(); // Получаем if.
// условие.
ExprAST *Cond = ParseExpression(IDNames);
ExprAST *Cond = ParseExpression(IDNames, true);
if (!Cond) return nullptr;
if (CurTok != tok_then)
return Error("expected then");
getNextToken(); // Получаем then
ExprAST *Then = ParseExpression(nullptr);
ExprAST *Then = ParseExpression(IDNames, false);
if (!Then) return nullptr;
// if (CurTok != tok_else)
@@ -848,7 +851,8 @@ ExprAST *IoTScenario::ParseIfExpr(String *IDNames) {
ExprAST *Else = nullptr;
if (CurTok == tok_else) {
getNextToken();
Else = ParseExpression(nullptr);
Else = ParseExpression(IDNames, false);
if (!Else) return nullptr;
}
return new IfExprAST(Cond, Then, Else, IDNames);
@@ -858,24 +862,24 @@ ExprAST *IoTScenario::ParseIfExpr(String *IDNames) {
/// ::= identifierexpr
/// ::= numberexpr
/// ::= parenexpr
ExprAST *IoTScenario::ParsePrimary(String *IDNames) {
ExprAST *IoTScenario::ParsePrimary(String *IDNames, bool callFromCondition) {
switch (CurTok) {
default:
Serial.println(CurTok);
return Error("unknown token when expecting an expression");
case tok_identifier: {
if (IDNames) {
if (callFromCondition && IDNames) {
String tmpstr = *IDNames;
*IDNames = tmpstr + " " + IdentifierStr + " ";
}
return ParseIdentifierExpr(IDNames);
return ParseIdentifierExpr(IDNames, callFromCondition);
}
case tok_number:
return ParseNumberExpr();
case '(':
return ParseParenExpr();
return ParseParenExpr(IDNames, callFromCondition);
case '{':
return ParseBracketsExpr();
return ParseBracketsExpr(IDNames, callFromCondition);
case tok_string:
return ParseQuotesExpr();
case tok_if:
@@ -885,7 +889,7 @@ ExprAST *IoTScenario::ParsePrimary(String *IDNames) {
/// binoprhs
/// ::= ('+' primary)*
ExprAST *IoTScenario::ParseBinOpRHS(int ExprPrec, ExprAST *LHS, String *IDNames) {
ExprAST *IoTScenario::ParseBinOpRHS(int ExprPrec, ExprAST *LHS, String *IDNames, bool callFromCondition) {
// Если это бинарный оператор, получаем его приоритет
while (1) {
int TokPrec = GetTokPrecedence();
@@ -900,14 +904,14 @@ ExprAST *IoTScenario::ParseBinOpRHS(int ExprPrec, ExprAST *LHS, String *IDNames)
getNextToken(); // eat binop
// Разобрать первичное выражение после бинарного оператора
ExprAST *RHS = ParsePrimary(IDNames);
ExprAST *RHS = ParsePrimary(IDNames, callFromCondition);
if (!RHS) return nullptr;
// Если BinOp связан с RHS меньшим приоритетом, чем оператор после RHS,
// то берём часть вместе с RHS как LHS.
int NextPrec = GetTokPrecedence();
if (TokPrec < NextPrec) {
RHS = ParseBinOpRHS(TokPrec + 1, RHS, IDNames);
RHS = ParseBinOpRHS(TokPrec + 1, RHS, IDNames, callFromCondition);
if (RHS == nullptr) return nullptr;
}
@@ -919,10 +923,10 @@ ExprAST *IoTScenario::ParseBinOpRHS(int ExprPrec, ExprAST *LHS, String *IDNames)
/// expression
/// ::= primary binoprhs
///
ExprAST *IoTScenario::ParseExpression(String *IDNames) {
ExprAST *LHS = ParsePrimary(IDNames);
ExprAST *IoTScenario::ParseExpression(String *IDNames, bool callFromCondition) {
ExprAST *LHS = ParsePrimary(IDNames, callFromCondition);
if (!LHS) return nullptr;
return ParseBinOpRHS(0, LHS, IDNames);
return ParseBinOpRHS(0, LHS, IDNames, callFromCondition);
}