Matija Kecman
4e46db8903
* All tests moved into wasm/codegen/tests folder * Merged wasm/codegen/helpers/ into wasm/codegen/generators/ PiperOrigin-RevId: 829471173 Change-Id: I2dbc5d9351771817ec260c7ddf87c31e66a9eabe
104 lines
3.2 KiB
Python
104 lines
3.2 KiB
Python
# Copyright 2025 DeepMind Technologies Limited
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Helper class to build code string line by line with indentation."""
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INDENT = " "
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class CodeBuilder:
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"""Helper class to build code string line by line with indentation."""
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def __init__(self, indent_str: str = INDENT):
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self._lines = []
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self._indent_level = 0
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self._indent_str = indent_str
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def line(self, line_content: str) -> None:
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"""Adds a line with indentation, special-casing "private:" and "public:"."""
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indent = self._indent_str * self._indent_level
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content = line_content.strip()
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if content == "private:" or content == "public:":
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self._lines.append(indent[:-1] + line_content)
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elif content:
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self._lines.append(indent + line_content)
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else:
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self._lines.append("")
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def newline(self) -> None:
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"""Adds a newline."""
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self.line("")
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def to_string(self) -> str:
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"""Returns the complete code string."""
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return "\n".join(self._lines)
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class IndentBlock:
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"""Helper class to manage indentation within a `with` statement."""
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def __init__(self, builder: "CodeBuilder", header_line="", braces=True):
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self._builder = builder
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self._header_line = header_line
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self._braces = braces
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def __enter__(self):
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line = self._header_line
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if self._braces:
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line += " {" if line else "{"
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self._builder.line(line)
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self._builder._indent_level += 1
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self._line_count_enter = len(self._builder._lines)
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return self._builder
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def __exit__(self, exc_type, exc_val, exc_tb):
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if self._builder._indent_level > 0:
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self._builder._indent_level -= 1
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if self._line_count_enter == len(self._builder._lines):
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self._builder._lines[-1] += "}"
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else:
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if self._braces:
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self._builder.line("}")
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def block(self, header_line="", braces=True) -> IndentBlock:
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"""Creates a block including braces and an optional header before the opening brace.
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Use via a `with` statement.
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Args:
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header_line: Optional header line to add before the opening brace.
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braces: Whether to include opening and closing braces.
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Returns:
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An IndentBlock instance that manages the indentation.
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"""
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return self.IndentBlock(self, header_line, braces)
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def function(self, signature="") -> IndentBlock:
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"""Creates a function."""
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return self.block(signature)
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def struct(self, name="") -> IndentBlock:
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"""Creates a struct."""
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return self.block(f"struct {name}")
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def private(self) -> None:
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"""Creates a private section."""
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self.newline()
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self.line("private:")
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def public(self) -> None:
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"""Creates a public section."""
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self.newline()
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self.line("public:")
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