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WIP: if-then-else, incomplete

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This commit is contained in:
Kayne Ruse
2024-11-19 17:14:39 +11:00
parent 7398898a61
commit 34577ecfe1
8 changed files with 197 additions and 11 deletions
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42
source/toy_parser.c
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@@ -655,6 +655,7 @@ static void makeExpr(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** ro
//forward declarations
static void makeBlockStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
static void makeDeclarationStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
static void makeAssertStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle) {
Toy_Ast* ast = NULL; //assert's emit function is a bit different
@@ -677,6 +678,27 @@ static void makeAssertStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_As
consume(parser, TOY_TOKEN_OPERATOR_SEMICOLON, "Expected ';' at the end of assert statement");
}
static void makeIfThenElseStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle) {
Toy_Ast* condBranch = NULL;
Toy_Ast* thenBranch = NULL;
Toy_Ast* elseBranch = NULL;
//if (condBranch)
consume(parser, TOY_TOKEN_OPERATOR_PAREN_LEFT, "Expected '(' after 'if' keyword");
makeExpr(bucketHandle, parser, &condBranch);
consume(parser, TOY_TOKEN_OPERATOR_PAREN_RIGHT, "Expected ')' after 'if' condition");
// { thenBranch }
makeDeclarationStmt(bucketHandle, parser, &thenBranch);
//else { elseBranch }
if (match(parser, TOY_TOKEN_KEYWORD_ELSE)) {
makeDeclarationStmt(bucketHandle, parser, &elseBranch);
}
Toy_private_emitAstIfThenElse(bucketHandle, rootHandle, condBranch, thenBranch, elseBranch);
}
static void makePrintStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle) {
makeExpr(bucketHandle, parser, rootHandle);
Toy_private_emitAstPrint(bucketHandle, rootHandle);
@@ -737,12 +759,18 @@ static void makeStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** ro
return;
}
//assert
else if (match(parser, TOY_TOKEN_KEYWORD_ASSERT)) {
makeAssertStmt(bucketHandle, parser, rootHandle);
return;
}
//if-then-else
else if (match(parser, TOY_TOKEN_KEYWORD_IF)) {
makeIfThenElseStmt(bucketHandle, parser, rootHandle);
return;
}
//while-then
//for-pre-clause-post-then
//break
@@ -750,17 +778,19 @@ static void makeStmt(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** ro
//return
//import
//check for empty lines
else if (match(parser, TOY_TOKEN_OPERATOR_SEMICOLON)) {
Toy_private_emitAstPass(bucketHandle, rootHandle);
return;
}
//print
else if (match(parser, TOY_TOKEN_KEYWORD_PRINT)) {
makePrintStmt(bucketHandle, parser, rootHandle);
return;
}
//empty lines
else if (match(parser, TOY_TOKEN_OPERATOR_SEMICOLON)) {
Toy_private_emitAstPass(bucketHandle, rootHandle);
return;
}
//expressions
else {
//default
makeExprStmt(bucketHandle, parser, rootHandle);