Halide 22.0.0 Halide compiler and libraries

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ParamParser.h
Go to the documentation of this file.
1#ifndef PARSE_H
2#define PARSE_H
3
4#include "HalidePlugin.h"
5#include <sstream>
6#include <type_traits>
7
8 namespace Halide {
9 namespace Internal {
10 namespace Autoscheduler {
11
12 class ParamParser {
13 std::map<std::string, std::string> extra;
14
15 // If the string can be parsed as a valid "T", set *value to it.
16 // If not, assert-fail.
17 template<typename T>
18 static void parse_or_die(const std::string &str, T *value) {
19 std::istringstream iss(str);
20 T t;
21 // All one-byte ints int8 and uint8 should be parsed as integers, not chars --
22 // including 'char' itself. (Note that sizeof(bool) is often-but-not-always-1,
23 // so be sure to exclude that case.)
24 if constexpr (sizeof(T) == sizeof(char) && !std::is_same_v<T, bool>) {
25 int i;
26 iss >> i;
27 t = (T)i;
28 } else {
29 iss >> t;
30 }
31 user_assert(!iss.fail() && iss.get() == EOF) << "Unable to parse: " << str;
32 *value = t;
33 }
34
35 public:
36 explicit ParamParser(const std::map<std::string, std::string> &m)
37 : extra(m) {
38 }
39
40 // If the given key is present in m, parse the result into *value and return true.
41 // (If the string cannot be parsed as a valid "T", assert-fail.)
42 // If the given key is not present, leave *value untouched and return false.
43 template<typename T>
44 bool parse(const std::string &key, T *value) {
45 auto it = extra.find(key);
46 if (it == extra.end()) {
47 return false;
48 }
49 parse_or_die(it->second, value);
50 extra.erase(it);
51 return true;
52 }
53
54 void finish() {
55 if (!extra.empty()) {
56 std::ostringstream oss;
57 oss << "Autoscheduler Params contain unknown keys:\n";
58 for (const auto &it : extra) {
59 oss << " " << it.first << "\n";
60 }
61 user_error << oss.str();
62 }
63 }
64
65 ~ParamParser() {
66 finish();
67 }
68};
69
70} // namespace Autoscheduler
71} // namespace Internal
72} // namespace Halide
73
74#endif
user_error
#define user_error
Definition Error.h:228
user_assert
#define user_assert(c)
Definition Error.h:233
HalidePlugin.h
Halide::Internal::Autoscheduler::ParamParser
Definition ParamParser.h:12
Halide::Internal::Autoscheduler::ParamParser::finish
void finish()
Definition ParamParser.h:54
Halide::Internal::Autoscheduler::ParamParser::~ParamParser
~ParamParser()
Definition ParamParser.h:65
Halide::Internal::Autoscheduler::ParamParser::parse
bool parse(const std::string &key, T *value)
Definition ParamParser.h:44
Halide::Internal::Autoscheduler::ParamParser::ParamParser
ParamParser(const std::map< std::string, std::string > &m)
Definition ParamParser.h:36
Halide
This file defines the class FunctionDAG, which is our representation of a Halide pipeline,...
Definition AbstractGenerator.h:19
Halide::LinkageType::Internal
@ Internal
Not visible externally, similar to 'static' linkage in C.
Halide::cast
Internal::ConstantInterval cast(Type t, const Internal::ConstantInterval &a)
Cast operators for ConstantIntervals.