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function call names are expressions

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This commit is contained in:
Andrew Kelley 2015-11-29 14:39:11 -07:00
parent 918e7641fc
commit c1d77f2a23
4 changed files with 99 additions and 96 deletions
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8
README.md
View File

@ -88,6 +88,8 @@ ExternBlock : many(Directive) token(Extern) token(LBrace) many(FnDecl) token(RBr
FnProto : many(Directive) option(FnVisibleMod) token(Fn) token(Symbol) ParamDeclList option(token(Arrow) Type)
Directive : token(NumberSign) token(Symbol) token(LParen) token(String) token(RParen)
FnVisibleMod : token(Pub) | token(Export)
FnDecl : FnProto token(Semicolon)
@ -142,15 +144,13 @@ CastExpression : PrefixOpExpression token(as) Type | PrefixOpExpression
PrefixOpExpression : PrefixOp FnCallExpression | FnCallExpression
FnCallExpression : PrimaryExpression token(LParen) list(Expression, token(Comma)) token(RParen)
FnCallExpression : PrimaryExpression token(LParen) list(Expression, token(Comma)) token(RParen) | PrimaryExpression
PrefixOp : token(Not) | token(Dash) | token(Tilde)
PrimaryExpression : token(Number) | token(String) | token(Unreachable) | GroupedExpression | Block
PrimaryExpression : token(Number) | token(String) | token(Unreachable) | GroupedExpression | Block | token(Symbol)
GroupedExpression : token(LParen) Expression token(RParen)
Directive : token(NumberSign) token(Symbol) token(LParen) token(String) token(RParen)
```
### Operator Precedence

88
src/codegen.cpp
View File

@ -306,7 +306,7 @@ static void find_declarations(CodeGen *g, AstNode *node) {
case NodeTypeRoot:
case NodeTypeBlock:
case NodeTypeBoolOrExpr:
case NodeTypeFnCall:
case NodeTypeFnCallExpr:
case NodeTypeRootExportDecl:
case NodeTypeBoolAndExpr:
case NodeTypeComparisonExpr:
@ -378,6 +378,14 @@ static void check_fn_def_control_flow(CodeGen *g, AstNode *node) {
}
}
static Buf *hack_get_fn_call_name(CodeGen *g, AstNode *node) {
// Assume that the expression evaluates to a simple name and return the buf
// TODO after type checking works we should be able to remove this hack
assert(node->type == NodeTypePrimaryExpr);
assert(node->data.primary_expr.type == PrimaryExprTypeSymbol);
return &node->data.primary_expr.data.symbol;
}
static void analyze_node(CodeGen *g, AstNode *node) {
switch (node->type) {
case NodeTypeRoot:
@ -487,9 +495,9 @@ static void analyze_node(CodeGen *g, AstNode *node) {
if (node->data.bool_or_expr.op2)
analyze_node(g, node->data.bool_or_expr.op2);
break;
case NodeTypeFnCall:
case NodeTypeFnCallExpr:
{
Buf *name = &node->data.fn_call.name;
Buf *name = hack_get_fn_call_name(g, node->data.fn_call_expr.fn_ref_expr);
auto entry = g->fn_table.maybe_get(name);
if (!entry) {
@ -499,7 +507,7 @@ static void analyze_node(CodeGen *g, AstNode *node) {
FnTableEntry *fn_table_entry = entry->value;
assert(fn_table_entry->proto_node->type == NodeTypeFnProto);
int expected_param_count = fn_table_entry->proto_node->data.fn_proto.params.length;
int actual_param_count = node->data.fn_call.params.length;
int actual_param_count = node->data.fn_call_expr.params.length;
if (expected_param_count != actual_param_count) {
add_node_error(g, node,
buf_sprintf("wrong number of arguments. Expected %d, got %d.",
@ -507,8 +515,8 @@ static void analyze_node(CodeGen *g, AstNode *node) {
}
}
for (int i = 0; i < node->data.fn_call.params.length; i += 1) {
AstNode *child = node->data.fn_call.params.at(i);
for (int i = 0; i < node->data.fn_call_expr.params.length; i += 1) {
AstNode *child = node->data.fn_call_expr.params.at(i);
analyze_node(g, child);
}
break;
@ -551,11 +559,9 @@ static void analyze_node(CodeGen *g, AstNode *node) {
case PrimaryExprTypeNumber:
case PrimaryExprTypeString:
case PrimaryExprTypeUnreachable:
case PrimaryExprTypeSymbol:
// nothing to do
break;
case PrimaryExprTypeFnCall:
analyze_node(g, node->data.primary_expr.data.fn_call);
break;
case PrimaryExprTypeGroupedExpr:
analyze_node(g, node->data.primary_expr.data.grouped_expr);
break;
@ -662,33 +668,6 @@ static void add_debug_source_node(CodeGen *g, AstNode *node) {
g->block_scopes.last()));
}
static LLVMValueRef gen_fn_call(CodeGen *g, AstNode *fn_call_node) {
assert(fn_call_node->type == NodeTypeFnCall);
Buf *name = &fn_call_node->data.fn_call.name;
FnTableEntry *fn_table_entry = g->fn_table.get(name);
assert(fn_table_entry->proto_node->type == NodeTypeFnProto);
int expected_param_count = fn_table_entry->proto_node->data.fn_proto.params.length;
int actual_param_count = fn_call_node->data.fn_call.params.length;
assert(expected_param_count == actual_param_count);
LLVMValueRef *param_values = allocate<LLVMValueRef>(actual_param_count);
for (int i = 0; i < actual_param_count; i += 1) {
AstNode *expr_node = fn_call_node->data.fn_call.params.at(i);
param_values[i] = gen_expr(g, expr_node);
}
add_debug_source_node(g, fn_call_node);
LLVMValueRef result = LLVMZigBuildCall(g->builder, fn_table_entry->fn_value,
param_values, actual_param_count, fn_table_entry->calling_convention, "");
if (type_is_unreachable(fn_table_entry->proto_node->data.fn_proto.return_type)) {
return LLVMBuildUnreachable(g->builder);
} else {
return result;
}
}
static LLVMValueRef find_or_create_string(CodeGen *g, Buf *str) {
auto entry = g->str_table.maybe_get(str);
if (entry) {
@ -733,17 +712,47 @@ static LLVMValueRef gen_primary_expr(CodeGen *g, AstNode *node) {
case PrimaryExprTypeUnreachable:
add_debug_source_node(g, node);
return LLVMBuildUnreachable(g->builder);
case PrimaryExprTypeFnCall:
return gen_fn_call(g, prim_expr->data.fn_call);
case PrimaryExprTypeGroupedExpr:
return gen_expr(g, prim_expr->data.grouped_expr);
case PrimaryExprTypeBlock:
zig_panic("TODO block in expression");
break;
case PrimaryExprTypeSymbol:
zig_panic("TODO variable reference");
break;
}
zig_unreachable();
}
static LLVMValueRef gen_fn_call_expr(CodeGen *g, AstNode *node) {
assert(node->type == NodeTypeFnCallExpr);
Buf *name = hack_get_fn_call_name(g, node->data.fn_call_expr.fn_ref_expr);
FnTableEntry *fn_table_entry = g->fn_table.get(name);
assert(fn_table_entry->proto_node->type == NodeTypeFnProto);
int expected_param_count = fn_table_entry->proto_node->data.fn_proto.params.length;
int actual_param_count = node->data.fn_call_expr.params.length;
assert(expected_param_count == actual_param_count);
LLVMValueRef *param_values = allocate<LLVMValueRef>(actual_param_count);
for (int i = 0; i < actual_param_count; i += 1) {
AstNode *expr_node = node->data.fn_call_expr.params.at(i);
param_values[i] = gen_expr(g, expr_node);
}
add_debug_source_node(g, node);
LLVMValueRef result = LLVMZigBuildCall(g->builder, fn_table_entry->fn_value,
param_values, actual_param_count, fn_table_entry->calling_convention, "");
if (type_is_unreachable(fn_table_entry->proto_node->data.fn_proto.return_type)) {
return LLVMBuildUnreachable(g->builder);
} else {
return result;
}
}
static LLVMValueRef gen_prefix_op_expr(CodeGen *g, AstNode *node) {
assert(node->type == NodeTypePrefixOpExpr);
assert(node->data.prefix_op_expr.primary_expr);
@ -1028,6 +1037,8 @@ static LLVMValueRef gen_expr(CodeGen *g, AstNode *node) {
return gen_return_expr(g, node);
case NodeTypePrefixOpExpr:
return gen_prefix_op_expr(g, node);
case NodeTypeFnCallExpr:
return gen_fn_call_expr(g, node);
case NodeTypeRoot:
case NodeTypeRootExportDecl:
case NodeTypeFnProto:
@ -1036,7 +1047,6 @@ static LLVMValueRef gen_expr(CodeGen *g, AstNode *node) {
case NodeTypeParamDecl:
case NodeTypeType:
case NodeTypeBlock:
case NodeTypeFnCall:
case NodeTypeExternBlock:
case NodeTypeDirective:
case NodeTypeBoolAndExpr:

87
src/parser.cpp
View File

@ -96,8 +96,8 @@ const char *node_type_str(NodeType node_type) {
return "Block";
case NodeTypeBoolOrExpr:
return "BoolOrExpr";
case NodeTypeFnCall:
return "FnCall";
case NodeTypeFnCallExpr:
return "FnCallExpr";
case NodeTypeExternBlock:
return "ExternBlock";
case NodeTypeDirective:
@ -232,10 +232,11 @@ void ast_print(AstNode *node, int indent) {
if (node->data.bool_or_expr.op2)
ast_print(node->data.bool_or_expr.op2, indent + 2);
break;
case NodeTypeFnCall:
fprintf(stderr, "%s '%s'\n", node_type_str(node->type), buf_ptr(&node->data.fn_call.name));
for (int i = 0; i < node->data.fn_call.params.length; i += 1) {
AstNode *child = node->data.fn_call.params.at(i);
case NodeTypeFnCallExpr:
fprintf(stderr, "%s\n", node_type_str(node->type));
ast_print(node->data.fn_call_expr.fn_ref_expr, indent + 2);
for (int i = 0; i < node->data.fn_call_expr.params.length; i += 1) {
AstNode *child = node->data.fn_call_expr.params.at(i);
ast_print(child, indent + 2);
}
break;
@ -318,10 +319,6 @@ void ast_print(AstNode *node, int indent) {
case PrimaryExprTypeUnreachable:
fprintf(stderr, "PrimaryExpr Unreachable\n");
break;
case PrimaryExprTypeFnCall:
fprintf(stderr, "PrimaryExpr FnCall\n");
ast_print(node->data.primary_expr.data.fn_call, indent + 2);
break;
case PrimaryExprTypeGroupedExpr:
fprintf(stderr, "PrimaryExpr GroupedExpr\n");
ast_print(node->data.primary_expr.data.grouped_expr, indent + 2);
@ -330,6 +327,10 @@ void ast_print(AstNode *node, int indent) {
fprintf(stderr, "PrimaryExpr Block\n");
ast_print(node->data.primary_expr.data.block, indent + 2);
break;
case PrimaryExprTypeSymbol:
fprintf(stderr, "PrimaryExpr Symbol %s\n",
buf_ptr(&node->data.primary_expr.data.symbol));
break;
}
break;
case NodeTypeGroupedExpr:
@ -626,32 +627,7 @@ static AstNode *ast_parse_grouped_expr(ParseContext *pc, int *token_index, bool
}
/*
FnCall : token(Symbol) token(LParen) list(Expression, token(Comma)) token(RParen) ;
*/
static AstNode *ast_parse_fn_call(ParseContext *pc, int *token_index, bool mandatory) {
Token *fn_name = &pc->tokens->at(*token_index);
if (fn_name->id != TokenIdSymbol) {
if (mandatory) {
ast_invalid_token_error(pc, fn_name);
} else {
return nullptr;
}
}
*token_index += 1;
AstNode *node = ast_create_node(NodeTypeFnCall, fn_name);
ast_buf_from_token(pc, fn_name, &node->data.fn_call.name);
ast_parse_fn_call_param_list(pc, *token_index, token_index, &node->data.fn_call.params);
return node;
}
/*
PrimaryExpression : token(Number) | token(String) | token(Unreachable) | FnCall | GroupedExpression | Block
PrimaryExpression : token(Number) | token(String) | token(Unreachable) | GroupedExpression | Block | token(Symbol)
*/
static AstNode *ast_parse_primary_expr(ParseContext *pc, int *token_index, bool mandatory) {
Token *token = &pc->tokens->at(*token_index);
@ -673,6 +649,12 @@ static AstNode *ast_parse_primary_expr(ParseContext *pc, int *token_index, bool
node->data.primary_expr.type = PrimaryExprTypeUnreachable;
*token_index += 1;
return node;
} else if (token->id == TokenIdSymbol) {
AstNode *node = ast_create_node(NodeTypePrimaryExpr, token);
node->data.primary_expr.type = PrimaryExprTypeSymbol;
ast_buf_from_token(pc, token, &node->data.primary_expr.data.symbol);
*token_index += 1;
return node;
}
AstNode *block_node = ast_parse_block(pc, token_index, false);
@ -691,20 +673,31 @@ static AstNode *ast_parse_primary_expr(ParseContext *pc, int *token_index, bool
return node;
}
AstNode *fn_call_node = ast_parse_fn_call(pc, token_index, false);
if (fn_call_node) {
AstNode *node = ast_create_node(NodeTypePrimaryExpr, token);
node->data.primary_expr.type = PrimaryExprTypeFnCall;
node->data.primary_expr.data.fn_call = fn_call_node;
return node;
}
if (!mandatory)
return nullptr;
ast_invalid_token_error(pc, token);
}
/*
FnCallExpression : PrimaryExpression token(LParen) list(Expression, token(Comma)) token(RParen) | PrimaryExpression
*/
static AstNode *ast_parse_fn_call_expr(ParseContext *pc, int *token_index, bool mandatory) {
AstNode *primary_expr = ast_parse_primary_expr(pc, token_index, mandatory);
if (!primary_expr)
return nullptr;
Token *l_paren = &pc->tokens->at(*token_index);
if (l_paren->id != TokenIdLParen)
return primary_expr;
AstNode *node = ast_create_node_with_node(NodeTypeFnCallExpr, primary_expr);
node->data.fn_call_expr.fn_ref_expr = primary_expr;
ast_parse_fn_call_param_list(pc, *token_index, token_index, &node->data.fn_call_expr.params);
return node;
}
static PrefixOp tok_to_prefix_op(Token *token) {
switch (token->id) {
case TokenIdBang: return PrefixOpBoolNot;
@ -732,15 +725,15 @@ static PrefixOp ast_parse_prefix_op(ParseContext *pc, int *token_index, bool man
}
/*
PrefixOpExpression : PrefixOp PrimaryExpression | PrimaryExpression
PrefixOpExpression : PrefixOp FnCallExpression | FnCallExpression
*/
static AstNode *ast_parse_prefix_op_expr(ParseContext *pc, int *token_index, bool mandatory) {
Token *token = &pc->tokens->at(*token_index);
PrefixOp prefix_op = ast_parse_prefix_op(pc, token_index, false);
if (prefix_op == PrefixOpInvalid)
return ast_parse_primary_expr(pc, token_index, mandatory);
return ast_parse_fn_call_expr(pc, token_index, mandatory);
AstNode *primary_expr = ast_parse_primary_expr(pc, token_index, true);
AstNode *primary_expr = ast_parse_fn_call_expr(pc, token_index, true);
AstNode *node = ast_create_node(NodeTypePrefixOpExpr, token);
node->data.prefix_op_expr.primary_expr = primary_expr;
node->data.prefix_op_expr.prefix_op = prefix_op;

12
src/parser.hpp
View File

@ -24,7 +24,6 @@ enum NodeType {
NodeTypeParamDecl,
NodeTypeType,
NodeTypeBlock,
NodeTypeFnCall,
NodeTypeExternBlock,
NodeTypeDirective,
NodeTypeReturnExpr,
@ -41,6 +40,7 @@ enum NodeType {
NodeTypePrimaryExpr,
NodeTypeGroupedExpr,
NodeTypePrefixOpExpr,
NodeTypeFnCallExpr,
};
struct AstNodeRoot {
@ -103,8 +103,8 @@ struct AstNodeBoolOrExpr {
AstNode *op2;
};
struct AstNodeFnCall {
Buf name;
struct AstNodeFnCallExpr {
AstNode *fn_ref_expr;
ZigList<AstNode *> params;
};
@ -214,9 +214,9 @@ enum PrimaryExprType {
PrimaryExprTypeNumber,
PrimaryExprTypeString,
PrimaryExprTypeUnreachable,
PrimaryExprTypeFnCall,
PrimaryExprTypeGroupedExpr,
PrimaryExprTypeBlock,
PrimaryExprTypeSymbol,
};
struct AstNodePrimaryExpr {
@ -224,7 +224,7 @@ struct AstNodePrimaryExpr {
union {
Buf number;
Buf string;
AstNode *fn_call;
Buf symbol;
AstNode *grouped_expr;
AstNode *block;
} data;
@ -263,7 +263,6 @@ struct AstNode {
AstNodeBlock block;
AstNodeReturnExpr return_expr;
AstNodeBoolOrExpr bool_or_expr;
AstNodeFnCall fn_call;
AstNodeExternBlock extern_block;
AstNodeDirective directive;
AstNodeBoolAndExpr bool_and_expr;
@ -278,6 +277,7 @@ struct AstNode {
AstNodePrimaryExpr primary_expr;
AstNodeGroupedExpr grouped_expr;
AstNodePrefixOpExpr prefix_op_expr;
AstNodeFnCallExpr fn_call_expr;
} data;
};