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Functions are successfully called, read more

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Return keyword is not yet implemented.

Functions are untested.

See #163
This commit is contained in:
Kayne Ruse
2025-02-17 14:05:07 +11:00
parent 76d89fe0ad
commit 02dfc996b4
12 changed files with 193 additions and 27 deletions
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38
source/toy_parser.c
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@@ -120,6 +120,7 @@ static Toy_AstFlag group(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast*
static Toy_AstFlag compound(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
static Toy_AstFlag aggregate(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
static Toy_AstFlag unaryPostfix(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
static Toy_AstFlag invoke(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle);
//precedence definitions
static ParsingTuple parsingRulesetTable[] = {
@@ -181,8 +182,8 @@ static ParsingTuple parsingRulesetTable[] = {
{PREC_ASSIGNMENT,NULL,binary},// TOY_TOKEN_OPERATOR_MULTIPLY_ASSIGN,
{PREC_ASSIGNMENT,NULL,binary},// TOY_TOKEN_OPERATOR_DIVIDE_ASSIGN,
{PREC_ASSIGNMENT,NULL,binary},// TOY_TOKEN_OPERATOR_MODULO_ASSIGN,
{PREC_CALL,unary,unaryPostfix},// TOY_TOKEN_OPERATOR_INCREMENT,
{PREC_CALL,unary,unaryPostfix},// TOY_TOKEN_OPERATOR_DECREMENT,
{PREC_UNARY,unary,unaryPostfix},// TOY_TOKEN_OPERATOR_INCREMENT,
{PREC_UNARY,unary,unaryPostfix},// TOY_TOKEN_OPERATOR_DECREMENT,
{PREC_ASSIGNMENT,NULL,binary},// TOY_TOKEN_OPERATOR_ASSIGN,
//comparator operators
@@ -194,7 +195,7 @@ static ParsingTuple parsingRulesetTable[] = {
{PREC_COMPARISON,NULL,binary},// TOY_TOKEN_OPERATOR_COMPARE_GREATER_EQUAL,
//structural operators
{PREC_GROUP,group,NULL},// TOY_TOKEN_OPERATOR_PAREN_LEFT,
{PREC_CALL,group,invoke},// TOY_TOKEN_OPERATOR_PAREN_LEFT,
{PREC_NONE,NULL,NULL},// TOY_TOKEN_OPERATOR_PAREN_RIGHT,
{PREC_GROUP,compound,aggregate},// TOY_TOKEN_OPERATOR_BRACKET_LEFT,
{PREC_NONE,compound,aggregate},// TOY_TOKEN_OPERATOR_BRACKET_RIGHT,
@@ -212,7 +213,7 @@ static ParsingTuple parsingRulesetTable[] = {
{PREC_GROUP,NULL,aggregate},// TOY_TOKEN_OPERATOR_COMMA, // ,
{PREC_NONE,NULL,NULL},// TOY_TOKEN_OPERATOR_DOT, // .
{PREC_CALL,NULL,binary},// TOY_TOKEN_OPERATOR_CONCAT, // ..
{PREC_UNARY,NULL,binary},// TOY_TOKEN_OPERATOR_CONCAT, // ..
{PREC_NONE,NULL,NULL},// TOY_TOKEN_OPERATOR_REST, // ...
//unused operators
@@ -557,7 +558,7 @@ static Toy_AstFlag binary(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast
}
case TOY_TOKEN_OPERATOR_CONCAT: {
parsePrecedence(bucketHandle, parser, rootHandle, PREC_CALL + 1);
parsePrecedence(bucketHandle, parser, rootHandle, PREC_UNARY + 1);
return TOY_AST_FLAG_CONCAT;
}
@@ -708,6 +709,31 @@ static Toy_AstFlag unaryPostfix(Toy_Bucket** bucketHandle, Toy_Parser* parser, T
}
}
static Toy_AstFlag invoke(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle) {
//infix must advance
advance(parser);
//read in args
Toy_Ast* args = NULL;
unsigned int paramIterations = 0;
while (parser->current.type != TOY_TOKEN_OPERATOR_PAREN_RIGHT && (paramIterations++ == 0 || match(parser, TOY_TOKEN_OPERATOR_COMMA))) {
//get the next arg
Toy_Ast* ast = NULL;
parsePrecedence(bucketHandle, parser, &ast, PREC_GROUP);
//add to the args aggregate (is added backwards, because weird)
Toy_private_emitAstAggregate(bucketHandle, &args, TOY_AST_FLAG_COLLECTION, ast);
}
consume(parser, TOY_TOKEN_OPERATOR_PAREN_RIGHT, "Expected ')' at the end of argument list");
//finally, emit the call as an Ast
Toy_private_emitAstFunctionInvokation(bucketHandle, rootHandle, args);
return TOY_AST_FLAG_NONE;
}
//grammar rules
static void parsePrecedence(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_Ast** rootHandle, ParsingPrecedence precRule) {
//'step over' the token to parse
@@ -741,7 +767,7 @@ static void parsePrecedence(Toy_Bucket** bucketHandle, Toy_Parser* parser, Toy_A
return;
}
Toy_Ast* ptr = NULL;
Toy_Ast* ptr = (*rootHandle); //NOTE: infix functions will need to be careful not to damage the pre-existing tree, if they can avoid it
Toy_AstFlag flag = infix(bucketHandle, parser, &ptr);
//finished