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if statement

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This commit is contained in:
Josh Wolfe 2017-09-20 21:16:49 -07:00
parent c3814eee26
commit 46fef543f9
1 changed files with 27 additions and 3 deletions
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30
src/parsec.cpp
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@ -1716,6 +1716,30 @@ static AstNode *trans_while_loop(Context *c, AstNode *block, WhileStmt *stmt) {
return while_node; return while_node;
} }
static AstNode *trans_if_statement(Context *c, AstNode *block, IfStmt *stmt) {
// if (c) t
// if (c) t else e
AstNode *if_node = trans_create_node(c, NodeTypeIfBoolExpr);
// TODO: condition != 0
AstNode *condition_node = trans_expr(c, true, block, stmt->getCond(), TransRValue);
if (condition_node == nullptr)
return nullptr;
if_node->data.if_bool_expr.condition = condition_node;
if_node->data.if_bool_expr.then_block = trans_stmt(c, false, block, stmt->getThen(), TransRValue);
if (if_node->data.if_bool_expr.then_block == nullptr)
return nullptr;
if (stmt->getElse() != nullptr) {
if_node->data.if_bool_expr.else_node = trans_stmt(c, false, block, stmt->getElse(), TransRValue);
if (if_node->data.if_bool_expr.else_node == nullptr)
return nullptr;
}
return if_node;
}
static AstNode *trans_stmt(Context *c, bool result_used, AstNode *block, Stmt *stmt, TransLRValue lrvalue) { static AstNode *trans_stmt(Context *c, bool result_used, AstNode *block, Stmt *stmt, TransLRValue lrvalue) {
Stmt::StmtClass sc = stmt->getStmtClass(); Stmt::StmtClass sc = stmt->getStmtClass();
switch (sc) { switch (sc) {
@ -1741,6 +1765,9 @@ static AstNode *trans_stmt(Context *c, bool result_used, AstNode *block, Stmt *s
return trans_local_declaration(c, block, (DeclStmt *)stmt); return trans_local_declaration(c, block, (DeclStmt *)stmt);
case Stmt::WhileStmtClass: case Stmt::WhileStmtClass:
return trans_while_loop(c, block, (WhileStmt *)stmt); return trans_while_loop(c, block, (WhileStmt *)stmt);
case Stmt::IfStmtClass:
return trans_if_statement(c, block, (IfStmt *)stmt);
case Stmt::CaseStmtClass: case Stmt::CaseStmtClass:
emit_warning(c, stmt->getLocStart(), "TODO handle C CaseStmtClass"); emit_warning(c, stmt->getLocStart(), "TODO handle C CaseStmtClass");
return nullptr; return nullptr;
@ -2106,9 +2133,6 @@ static AstNode *trans_stmt(Context *c, bool result_used, AstNode *block, Stmt *s
case Stmt::GotoStmtClass: case Stmt::GotoStmtClass:
emit_warning(c, stmt->getLocStart(), "TODO handle C GotoStmtClass"); emit_warning(c, stmt->getLocStart(), "TODO handle C GotoStmtClass");
return nullptr; return nullptr;
case Stmt::IfStmtClass:
emit_warning(c, stmt->getLocStart(), "TODO handle C IfStmtClass");
return nullptr;
case Stmt::IndirectGotoStmtClass: case Stmt::IndirectGotoStmtClass:
emit_warning(c, stmt->getLocStart(), "TODO handle C IndirectGotoStmtClass"); emit_warning(c, stmt->getLocStart(), "TODO handle C IndirectGotoStmtClass");
return nullptr; return nullptr;