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Implemented and tested variable declaration

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Assignment, etc. is still to come, as are types.
This commit is contained in:
Kayne Ruse
2024-10-13 15:02:42 +11:00
parent 1ad6bdff70
commit 80734563b9
18 changed files with 498 additions and 99 deletions
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44
source/toy_parser.c
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@@ -120,7 +120,7 @@ static ParsingTuple parsingRulesetTable[] = {
{PREC_PRIMARY,literal,NULL},// TOY_TOKEN_NULL,
//variable names
{PREC_NONE,NULL,NULL},// TOY_TOKEN_IDENTIFIER,
{PREC_NONE,NULL,NULL},// TOY_TOKEN_NAME,
//types
{PREC_NONE,NULL,NULL},// TOY_TOKEN_TYPE_TYPE,
@@ -528,6 +528,36 @@ static void makeExprStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast*
consume(parser, TOY_TOKEN_OPERATOR_SEMICOLON, "Expected ';' at the end of expression statement");
}
static void makeVariableDeclarationStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle) {
consume(parser, TOY_TOKEN_NAME, "Expected variable name after 'var' keyword");
if (parser->previous.length > 256) {
printError(parser, parser->previous, "Can't have a variable name longer than 256 characters");
Toy_private_emitAstError(bucketHandle, rootHandle);
return;
}
Toy_Token nameToken = parser->previous;
//TODO: read the type specifier if present
// Toy_Token typeToken = TOY_BLANK_TOKEN();
//build the string
Toy_String* nameStr = Toy_createNameStringLength(bucketHandle, nameToken.lexeme, nameToken.length, TOY_VALUE_NULL);
//if there's an assignment, read it, or default to null
Toy_Ast* expr = NULL;
if (match(parser, TOY_TOKEN_OPERATOR_ASSIGN)) {
makeExpr(bucketHandle, parser, &expr);
}
else {
Toy_private_emitAstValue(bucketHandle, rootHandle, TOY_VALUE_FROM_NULL());
}
//finally, emit the declaration as an Ast
Toy_private_emitAstVariableDeclaration(bucketHandle, rootHandle, nameStr, expr);
}
static void makeStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle) {
//block
//assert
@@ -558,10 +588,10 @@ static void makeStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** ro
}
static void makeDeclarationStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle) {
// //variable declarations
// if (match(parser, TOY_TOKEN_KEYWORD_VAR)) {
// makeVariableDeclarationStmt(bucketHandle, parser, rootHandle);
// }
//variable declarations
if (match(parser, TOY_TOKEN_KEYWORD_VAR)) {
makeVariableDeclarationStmt(bucketHandle, parser, rootHandle);
}
// //function declarations
// else if (match(parser, TOY_TOKEN_KEYWORD_FUNCTION)) {
@@ -569,9 +599,9 @@ static void makeDeclarationStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, T
// }
//otherwise
// else {
else {
makeStmt(bucketHandle, parser, rootHandle);
// }
}
}
static void makeBlockStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle) {