Support substitution of identifiers

[odashi]

Overview

Adds identifiers option to get_latex and with_latex.
CC: @cccntu @alecglen

It works like:

At this point, this feature does not support:

• direct substitution of LaTeX because of maintaining the correct structure of AST during the whole processing.
• converting nested attributes (e.g., foo.bar) because it requires recursive analysis and another syntax of substitution rules.

Details

identifiers option takes dict[str, str], in which each key/value represents a substitution rule of identifier names (must follow the Python's naming convention of identifiers). The rule affects against (1) function names, (2) function arguments, and (3) any identifiers in the expression.

The process is implemented as a NodeTransformer and is applied among AST parsing and LaTeX codegen.

References

• Fixes Support substitutions of names #50

Blocked by

• NA