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-rw-r--r--.build.yml15
-rw-r--r--.gitignore3
-rw-r--r--README.md0
-rw-r--r--crowbar_reference_compiler/__init__.py2
-rw-r--r--crowbar_reference_compiler/parser.py200
-rw-r--r--crowbar_reference_compiler/scanner.py76
-rw-r--r--poetry.lock157
-rw-r--r--pyproject.toml26
-rw-r--r--tests/__init__.py0
-rw-r--r--tests/test_parsing.py75
10 files changed, 554 insertions, 0 deletions
diff --git a/.build.yml b/.build.yml
new file mode 100644
index 0000000..7080980
--- /dev/null
+++ b/.build.yml
@@ -0,0 +1,15 @@
+image: alpine/latest
+packages:
+ - python3
+sources:
+ - https://git.sr.ht/~boringcactus/crowbar-reference-compiler
+tasks:
+ - setup: |
+ pip install poetry
+ poetry config virtualenvs.create false
+ cd crowbar-reference-compiler
+ poetry install
+ - test: |
+ cd crowbar-reference-compiler
+ poetry run mypy -p crowbar_reference_compiler
+ poetry run python -m unittest
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..95b58df
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/.venv
+/.idea
+/.mypy_cache
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/README.md
diff --git a/crowbar_reference_compiler/__init__.py b/crowbar_reference_compiler/__init__.py
new file mode 100644
index 0000000..7c7fca7
--- /dev/null
+++ b/crowbar_reference_compiler/__init__.py
@@ -0,0 +1,2 @@
+from .parser import parse_header, parse_implementation
+from .scanner import scan
diff --git a/crowbar_reference_compiler/parser.py b/crowbar_reference_compiler/parser.py
new file mode 100644
index 0000000..9bb3179
--- /dev/null
+++ b/crowbar_reference_compiler/parser.py
@@ -0,0 +1,200 @@
+from parsimonious import TokenGrammar, ParseError, IncompleteParseError # type: ignore
+
+grammar = TokenGrammar(
+ r"""
+HeaderFile = HeaderFileElement+
+HeaderFileElement = IncludeStatement /
+ TypeDeclaration /
+ FunctionDeclaration
+
+ImplementationFile = ImplementationFileElement+
+ImplementationFileElement = HeaderFileElement /
+ FunctionDefinition
+
+IncludeStatement = "include" string_literal ";"
+
+TypeDeclaration = StructDeclaration /
+ EnumDeclaration /
+ TypedefDeclaration
+StructDeclaration = "struct" identifier "{" VariableDeclaration+ "}" ";"
+EnumDeclaration = "enum" identifier "{" EnumBody "}" ";"
+EnumBody = (identifier ("=" Expression)? "," EnumBody) /
+ (identifier ("=" Expression)? ","?)
+TypedefDeclaration = "typedef" identifier "=" Type ";"
+
+FunctionDeclaration = FunctionSignature ";"
+FunctionDefinition = FunctionSignature Block
+FunctionSignature = Type identifier "(" SignatureArguments? ")"
+SignatureArguments = (Type identifier "," SignatureArguments) /
+ (Type identifier ","?)
+
+Block = "{" Statement* "}"
+
+Statement = VariableDefinition /
+ VariableDeclaration /
+ IfStatement /
+ SwitchStatement /
+ WhileStatement /
+ DoWhileStatement /
+ ForStatement /
+ FlowControlStatement /
+ AssignmentStatement /
+ ExpressionStatement
+
+VariableDefinition = Type identifier "=" Expression ";"
+VariableDeclaration = Type identifier ";"
+
+IfStatement = ("if" Expression Block "else" Block) /
+ ("if" Expression Block)
+
+SwitchStatement = "switch" Expression "{" SwitchCase+ "}"
+SwitchCase = (CaseSpecifier Block) /
+ ("default" Block)
+CaseSpecifier = ("case" Expression "," CaseSpecifier) /
+ ("case" Expression ","?)
+
+WhileStatement = "while" Expression Block
+DoWhileStatement = "do" Block "while" Expression ";"
+ForStatement = "for" VariableDefinition? ";" Expression ";" AssignmentStatementBody? Block
+
+FlowControlStatement = ("continue" ";") /
+ ("break" ";") /
+ ("return" Expression? ";")
+
+AssignmentStatement = AssignmentStatementBody ";"
+AssignmentStatementBody = (AssignmentTargetExpression "=" Expression) /
+ (AssignmentTargetExpression "+=" Expression) /
+ (AssignmentTargetExpression "-=" Expression) /
+ (AssignmentTargetExpression "*=" Expression) /
+ (AssignmentTargetExpression "/=" Expression) /
+ (AssignmentTargetExpression "%=" Expression) /
+ (AssignmentTargetExpression "&=" Expression) /
+ (AssignmentTargetExpression "^=" Expression) /
+ (AssignmentTargetExpression "|=" Expression) /
+ (AssignmentTargetExpression "++") /
+ (AssignmentTargetExpression "--")
+
+ExpressionStatement = Expression ";"
+
+Type = ("const" BasicType) /
+ (BasicType "*") /
+ (BasicType "[" Expression "]") /
+ (BasicType "function" "(" (BasicType ",")* ")") /
+ BasicType
+BasicType = "void" /
+ IntegerType /
+ ("signed" IntegerType) /
+ ("unsigned" IntegerType) /
+ "float" /
+ "double" /
+ "bool" /
+ ("struct" identifier) /
+ ("enum" identifier) /
+ ("typedef" identifier) /
+ ("(" Type ")")
+IntegerType = "char" /
+ "short" /
+ "int" /
+ "long"
+
+AssignmentTargetExpression = identifier ATEElementSuffix*
+ATEElementSuffix = ("[" Expression "]") /
+ ("." identifier) /
+ ("->" identifier)
+
+AtomicExpression = identifier /
+ constant /
+ string_literal /
+ ("(" Expression ")")
+
+ObjectExpression = (AtomicExpression ObjectSuffix*) /
+ ArrayLiteralExpression /
+ StructLiteralExpression
+ObjectSuffix = ("[" Expression "]") /
+ ("(" CommasExpressionList? ")") /
+ ("." identifier) /
+ ("->" identifier)
+CommasExpressionList = (Expression "," CommasExpressionList) /
+ (Expression ","?)
+ArrayLiteralExpression = "{" CommasExpressionList "}"
+StructLiteralExpression = "{" StructLiteralBody "}"
+StructLiteralBody = (StructLiteralElement "," StructLiteralBody?) /
+ (StructLiteralElement ","?)
+StructLiteralElement = "." identifier "=" Expression
+
+FactorExpression = ("(" Type ")" FactorExpression) /
+ ("&" FactorExpression) /
+ ("*" FactorExpression) /
+ ("+" FactorExpression) /
+ ("-" FactorExpression) /
+ ("~" FactorExpression) /
+ ("!" FactorExpression) /
+ ("sizeof" FactorExpression) /
+ ("sizeof" Type) /
+ ObjectExpression
+
+TermExpression = FactorExpression TermSuffix*
+TermSuffix = ("*" FactorExpression) /
+ ("/" FactorExpression) /
+ ("%" FactorExpression)
+
+ArithmeticExpression = TermExpression ArithmeticSuffix*
+ArithmeticSuffix = ("+" TermExpression) /
+ ("-" TermExpression)
+
+BitwiseOpExpression = (ArithmeticExpression "<<" ArithmeticExpression) /
+ (ArithmeticExpression ">>" ArithmeticExpression) /
+ (ArithmeticExpression "^" ArithmeticExpression) /
+ (ArithmeticExpression ("&" ArithmeticExpression)+) /
+ (ArithmeticExpression ("|" ArithmeticExpression)+) /
+ ArithmeticExpression
+
+ComparisonExpression = (BitwiseOpExpression "==" BitwiseOpExpression) /
+ (BitwiseOpExpression "!=" BitwiseOpExpression) /
+ (BitwiseOpExpression "<=" BitwiseOpExpression) /
+ (BitwiseOpExpression ">=" BitwiseOpExpression) /
+ (BitwiseOpExpression "<" BitwiseOpExpression) /
+ (BitwiseOpExpression ">" BitwiseOpExpression) /
+ BitwiseOpExpression
+
+Expression = (ComparisonExpression ("&&" ComparisonExpression)+) /
+ (ComparisonExpression ("||" ComparisonExpression)+) /
+ ComparisonExpression
+
+identifier = "identifier"
+constant = "constant"
+string_literal = "string_literal"
+""")
+
+
+class LegibleParseError(ParseError):
+ def line(self):
+ return "🤷"
+
+ def column(self):
+ return "🤷"
+
+
+class LegibleIncompleteParseError(IncompleteParseError):
+ def line(self):
+ return "🤷"
+
+ def column(self):
+ return "🤷"
+
+
+def parse_from_rule(rule, tokens):
+ try:
+ return rule.parse(tokens)
+ except IncompleteParseError as error:
+ raise LegibleIncompleteParseError(error.text, error.pos, error.expr)
+ except ParseError as error:
+ raise LegibleParseError(error.text, error.pos, error.expr)
+
+
+def parse_header(tokens):
+ return parse_from_rule(grammar['HeaderFile'], tokens)
+
+
+def parse_implementation(tokens):
+ return parse_from_rule(grammar['ImplementationFile'], tokens)
diff --git a/crowbar_reference_compiler/scanner.py b/crowbar_reference_compiler/scanner.py
new file mode 100644
index 0000000..fff8c35
--- /dev/null
+++ b/crowbar_reference_compiler/scanner.py
@@ -0,0 +1,76 @@
+from dataclasses import dataclass
+from typing import Optional, overload, List, Union
+
+import regex as re # type: ignore
+
+
+@dataclass
+class Token:
+ type: str
+ data: Optional[str] = None
+
+ def __repr__(self) -> str:
+ if self.data is not None:
+ return "{}: {}".format(self.type, repr(self.data))
+ else:
+ return repr(self.type)
+
+
+class GenerousTokenList(List[Token]):
+ def __getitem__(self, i):
+ try:
+ return super(GenerousTokenList, self).__getitem__(i)
+ except IndexError:
+ return Token('')
+
+
+KEYWORD = re.compile("bool|break|case|char|const|continue|default|do|double|else|enum|extern|float|for|function|if|include|int|long|return|short|signed|sizeof|struct|switch|typedef|unsigned|void|while")
+IDENTIFIER = re.compile(r"[\p{L}\p{Pc}\p{Cf}\p{Sk}\p{Mn}][\p{L}\p{Pc}\p{Cf}\p{Sk}\p{Mn}\p{N}]*")
+CONSTANT = re.compile(r"""([0-9_]+)|(0[bB][01_]+)|(0[xX][0-9a-fA-F_]+)|([0-9_]+(\.[0-9_]+|[eE][0-9_]+|\.[0-9_]+[eE][0-9_]+))|('([^\'\\]|\\'|\\"|\\\\|\\r|\\n|\\t|\\0|\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8})')""")
+STRING_LITERAL = re.compile(r'''"([^\\"]|\\'|\\"|\\\\|\\r|\\n|\\t|\\0|\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8})*"''')
+PUNCTUATOR = re.compile(r"->|\+\+|--|>>|<<|<=|>=|&&|\|\||[=!+\-*/%&|^]=|[\[\](){}.,+\-*/%;!&|^~><=]")
+WHITESPACE = re.compile(r"[\p{Zs}\p{Cc}]+")
+COMMENT = re.compile(r"(//[^\n]*\n)|(/\*.*?\*/)", re.DOTALL)
+
+
+def scan(code):
+ result = []
+ remaining = code
+
+ while len(remaining) > 0:
+ match = COMMENT.match(remaining)
+ if match:
+ remaining = remaining[match.end():]
+ continue
+ match = WHITESPACE.match(remaining)
+ if match:
+ remaining = remaining[match.end():]
+ continue
+ match = KEYWORD.match(remaining)
+ if match:
+ result.append(Token(match.group()))
+ remaining = remaining[match.end():]
+ continue
+ match = IDENTIFIER.match(remaining)
+ if match:
+ result.append(Token('identifier', match.group()))
+ remaining = remaining[match.end():]
+ continue
+ match = CONSTANT.match(remaining)
+ if match:
+ result.append(Token('constant', match.group()))
+ remaining = remaining[match.end():]
+ continue
+ match = STRING_LITERAL.match(remaining)
+ if match:
+ result.append(Token('string_literal', match.group()))
+ remaining = remaining[match.end():]
+ continue
+ match = PUNCTUATOR.match(remaining)
+ if match:
+ result.append(Token(match.group()))
+ remaining = remaining[match.end():]
+ continue
+ raise ValueError("unrecognized code in scanner: {}".format(repr(remaining[:20])))
+
+ return GenerousTokenList(result)
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..ca35235
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,157 @@
+[[package]]
+name = "mypy"
+version = "0.790"
+description = "Optional static typing for Python"
+category = "dev"
+optional = false
+python-versions = ">=3.5"
+
+[package.dependencies]
+mypy-extensions = ">=0.4.3,<0.5.0"
+typed-ast = ">=1.4.0,<1.5.0"
+typing-extensions = ">=3.7.4"
+
+[package.extras]
+dmypy = ["psutil (>=4.0)"]
+
+[[package]]
+name = "mypy-extensions"
+version = "0.4.3"
+description = "Experimental type system extensions for programs checked with the mypy typechecker."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "parsimonious"
+version = "0.8.1"
+description = "(Soon to be) the fastest pure-Python PEG parser I could muster"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+six = ">=1.9.0"
+
+[[package]]
+name = "regex"
+version = "2020.10.11"
+description = "Alternative regular expression module, to replace re."
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "six"
+version = "1.15.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "typed-ast"
+version = "1.4.1"
+description = "a fork of Python 2 and 3 ast modules with type comment support"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "typing-extensions"
+version = "3.7.4.3"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[metadata]
+lock-version = "1.1"
+python-versions = "^3.7"
+content-hash = "d319360e78308e2272c729ac4a26f170b4836cc7c7fade980e771c58aa685806"
+
+[metadata.files]
+mypy = [
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diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..ef013a4
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,26 @@
+[tool.poetry]
+name = "crowbar-reference-compiler"
+version = "0.0.1"
+description = "the reference compiler for the Crowbar programming language"
+authors = ["Melody Horn <melody@boringcactus.com>"]
+license = "BlueOak-1.0.0"
+readme = "README.md"
+repository = "https://git.sr.ht/~boringcactus/crowbar-reference-compiler"
+classifiers = [
+ "Development Status :: 2 - Pre-Alpha",
+ "Intended Audience :: Developers",
+ "Programming Language :: Other",
+ "Topic :: Software Development :: Compilers",
+]
+
+[tool.poetry.dependencies]
+python = "^3.7"
+parsimonious = "^0.8.1"
+regex = "^2020.10.11"
+
+[tool.poetry.dev-dependencies]
+mypy = "^0.790"
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/__init__.py
diff --git a/tests/test_parsing.py b/tests/test_parsing.py
new file mode 100644
index 0000000..91787a6
--- /dev/null
+++ b/tests/test_parsing.py
@@ -0,0 +1,75 @@
+import unittest
+
+from crowbar_reference_compiler import parse_header, parse_implementation, scan
+
+
+class TestParsing(unittest.TestCase):
+ def test_basic(self):
+ print(parse_header(scan("int x();")))
+
+ def test_scdoc_str(self):
+ # adapted from https://git.sr.ht/~sircmpwn/scdoc/tree/master/include/str.h
+ print(parse_header(scan(r"""
+include "stdint.h";
+
+struct str {
+ char *str;
+ typedef size_t len;
+ typedef size_t size;
+};
+
+struct str *str_create();
+void str_free(struct str *str);
+void str_reset(struct str *str);
+int str_append_ch(struct str *str, typedef uint32_t ch);
+""")))
+ # adapted from https://git.sr.ht/~sircmpwn/scdoc/tree/master/src/string.c
+ print(parse_implementation(scan(r"""
+include "stdlib.h";
+include "stdint.h";
+include "str.h";
+include "unicode.h";
+
+int ensure_capacity(struct str *str, typedef size_t len) {
+ if (len + 1 >= str->size) {
+ char *new = realloc(str->str, str->size * 2);
+ if (!new) {
+ return 0;
+ }
+ str->str = new;
+ str->size *= 2;
+ }
+ return 1;
+}
+
+struct str *str_create() {
+ struct str *str = calloc(1, sizeof(struct str));
+ str->str = malloc(16);
+ str->size = 16;
+ str->len = 0;
+ str->str[0] = '\0';
+ return str;
+}
+
+void str_free(struct str *str) {
+ if (!str) {
+ return;
+ }
+ free(str->str);
+ free(str);
+}
+
+int str_append_ch(struct str *str, typedef uint32_t ch) {
+ int size = utf8_chsize(ch);
+ if (size <= 0) {
+ return -1;
+ }
+ if (!ensure_capacity(str, str->len + size)) {
+ return -1;
+ }
+ utf8_encode(&str->str[str->len], ch);
+ str->len += size;
+ str->str[str->len] = '\0';
+ return size;
+}
+""")))
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 17:41:27 +0000