vb6interpret 0.1.0

VB6 interpreter for executing VB6 code directly
Documentation 
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//! VB6 string function registry.
//!
//! One registry entry per string function, declared with the declarative
//! [`typed_builtin!`](crate::typed_builtin) spec. Parameters documented by
//! VB6 to propagate Null (the non-`$` string-input family) use the
//! `propstring` kind; everything else converts strictly at the boundary.
//! The only hand-written adapter left is `instr`, whose argument positions
//! depend on arity.

use super::{Builtin, Registry};
use crate::typed_builtin;
use vb6runtime::library::string as strfn;
use vb6runtime::VBVariant;

/// Register the string functions in `registry`.
pub(super) fn register(registry: &mut Registry) {
    registry.insert(typed_builtin!("len", 1, 1, (input: string),
        strfn::len(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("left$", 2, 2, (input: string, length: long),
        strfn::left_dollar(&input, &length).map(VBVariant::from)));
    registry.insert(
        typed_builtin!("left", 2, 2, (input: propstring, length: long),
        strfn::left(&input, &length)),
    );
    registry.insert(
        typed_builtin!("right", 2, 2, (input: propstring, length: long),
        strfn::right(&input, &length)),
    );
    registry.insert(
        typed_builtin!("mid", 2, 3, (input: propstring, start: long, length: opt_long),
        strfn::mid(&input, &start, length.as_ref())),
    );
    registry.insert(
        typed_builtin!("right$", 2, 2, (input: string, length: long),
        strfn::right_dollar(&input, &length).map(VBVariant::from)),
    );
    registry.insert(
        typed_builtin!("mid$", 2, 3, (input: string, start: long, length: opt_long),
        strfn::mid_dollar(&input, &start, length.as_ref()).map(VBVariant::from)),
    );
    registry.insert(typed_builtin!("lcase", 1, 1, (input: propstring),
        strfn::lcase(&input)));
    registry.insert(typed_builtin!("ucase", 1, 1, (input: propstring),
        strfn::ucase(&input)));
    registry.insert(typed_builtin!("trim", 1, 1, (input: propstring),
        strfn::trim(&input)));
    registry.insert(typed_builtin!("ltrim", 1, 1, (input: propstring),  
        strfn::ltrim(&input)));
    registry.insert(typed_builtin!("rtrim", 1, 1, (input: propstring),
        strfn::rtrim(&input)));
    // `LSet` is a statement; the registry entry exposes the alignment
    // primitive `(stringvar, string) -> aligned string` for dispatch.
    registry.insert(
        typed_builtin!("lset", 2, 2, (stringvar: string, value: string),
        strfn::lset_statement(&stringvar, &value).map(VBVariant::from)),
    );
    // `RSet` mirrors `LSet`: statement syntax wired in `exec`, with this
    // registry entry exposing the right-alignment primitive.
    registry.insert(
        typed_builtin!("rset", 2, 2, (stringvar: string, value: string),
        strfn::rset_statement(&stringvar, &value).map(VBVariant::from)),
    );
    registry.insert(typed_builtin!("lcase$", 1, 1, (input: string),
        strfn::lcase_dollar(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("ucase$", 1, 1, (input: string),
        strfn::ucase_dollar(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("trim$", 1, 1, (input: string),
        strfn::trim_dollar(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("ltrim$", 1, 1, (input: string),
        strfn::ltrim_dollar(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("rtrim$", 1, 1, (input: string),
        strfn::rtrim_dollar(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("strreverse", 1, 1, (input: propstring),
        strfn::strreverse(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("asc", 1, 1, (input: string),
        strfn::asc(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("ascw", 1, 1, (input: string),
        strfn::ascw(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("ascb", 1, 1, (input: string),
        strfn::ascb(&input).map(VBVariant::from)));
    registry.insert(typed_builtin!("chr", 1, 1, (charcode: long),
        strfn::chr(&charcode)));
    registry.insert(typed_builtin!("chr$", 1, 1, (charcode: long),
        strfn::chr_dollar(&charcode).map(VBVariant::from)));
    registry.insert(typed_builtin!("chrw", 1, 1, (charcode: long),
        strfn::chrw(&charcode)));
    registry.insert(typed_builtin!("chrw$", 1, 1, (charcode: long),
        strfn::chrw_dollar(&charcode).map(VBVariant::from)));
    registry.insert(typed_builtin!("chrb", 1, 1, (charcode: long),
        strfn::chrb(&charcode)));
    registry.insert(typed_builtin!("chrb$", 1, 1, (charcode: long),
        strfn::chrb_dollar(&charcode).map(VBVariant::from)));
    registry.insert(typed_builtin!("space", 1, 1, (number: long),
        strfn::space(&number)));
    registry.insert(typed_builtin!("space$", 1, 1, (number: long),
        strfn::space_dollar(&number).map(VBVariant::from)));
    // `instr`'s argument positions depend on arity: the two-argument form has
    // no `start`, and a trailing `compare` rides after the two strings. The
    // raw tail is therefore bound here and dispatched next to the
    // implementation, which owns the documented conversion order.
    registry.insert(typed_builtin!("instr", 2, 4,
        (), rest args: variants,
        strfn::instr::instr_dispatch(args)));
    registry.insert(typed_builtin!(
        "instrrev", 2, 4,
        (s1: string, s2: string, start: opt_long, compare: opt_long),
        strfn::instrrev(&s1, &s2, start.as_ref(), compare.as_ref()).map(VBVariant::from)
    ));
    registry.insert(typed_builtin!(
        "format", 1, 4,
        (expression: variant, format: opt_string, firstdayofweek: opt_long, firstweekofyear: opt_long),
        strfn::format(
            expression,
            format.as_ref(),
            firstdayofweek.as_ref(),
            firstweekofyear.as_ref(),
        )
    ));
    registry.insert(typed_builtin!(
        "format$", 1, 4,
        (expression: variant, format: opt_string, firstdayofweek: opt_long, firstweekofyear: opt_long),
        strfn::format_dollar(
            expression,
            format.as_ref(),
            firstdayofweek.as_ref(),
            firstweekofyear.as_ref(),
        )
        .map(VBVariant::from)
    ));
    registry.insert(typed_builtin!("lenb", 1, 1, (input: string),
        strfn::lenb(&input).map(VBVariant::from)));
    registry.insert(
        typed_builtin!("leftb", 2, 2, (input: propstring, length: long),
        strfn::leftb(&input, &length)),
    );
    registry.insert(
        typed_builtin!("leftb$", 2, 2, (input: string, length: long),
        strfn::leftb_dollar(&input, &length).map(VBVariant::from)),
    );
    registry.insert(
        typed_builtin!("rightb", 2, 2, (input: propstring, length: long),
        strfn::rightb(&input, &length)),
    );
    registry.insert(
        typed_builtin!("rightb$", 2, 2, (input: string, length: long),
        strfn::rightb_dollar(&input, &length).map(VBVariant::from)),
    );
    registry.insert(
        typed_builtin!("midb", 2, 3, (input: propstring, start: long, length: opt_long),
        strfn::midb(&input, &start, length.as_ref())),
    );
    registry.insert(
        typed_builtin!("midb$", 2, 3, (input: string, start: long, length: opt_long),
        strfn::midb_dollar(&input, &start, length.as_ref()).map(VBVariant::from)),
    );
    registry.insert(typed_builtin!("str", 1, 1, (number: variant),
        strfn::str(number)));
    registry.insert(typed_builtin!("str$", 1, 1, (number: variant),
        strfn::str_dollar(number).map(VBVariant::from)));
    registry.insert(
        typed_builtin!("string", 2, 2, (number: long, character: variant),
        strfn::string_function(&number, character)),
    );
    registry.insert(
        typed_builtin!("string$", 2, 2, (number: long, character: variant),
        strfn::string_dollar(&number, character).map(VBVariant::from)),
    );
    registry.insert(typed_builtin!("strcomp", 2, 3,
        (string1: string, string2: string, compare: opt_long),
        strfn::strcomp(&string1, &string2, compare.as_ref()).map(VBVariant::from)));
    registry.insert(
        typed_builtin!("strconv", 2, 3, (input: string, conversion: long, lcid: opt_long),
        strfn::strconv(&input, &conversion, lcid.as_ref())),
    );
    registry.insert(typed_builtin!("strconv$", 2, 3,
        (input: string, conversion: long, lcid: opt_long),
        strfn::strconv_dollar(&input, &conversion, lcid.as_ref()).map(VBVariant::from)));
    registry.insert(typed_builtin!(
        "replace", 3, 6,
        (expression: variant, find: variant, replacement: variant,
         start: opt_long, count: opt_long, compare: opt_long),
        strfn::replace(
            expression,
            find,
            replacement,
            start.as_ref(),
            count.as_ref(),
            compare.as_ref(),
        )
    ));
    registry.insert(typed_builtin!(
        "formatnumber", 1, 5,
        (expression: variant, digits: opt_long, leading: opt_long, parens: opt_long, group: opt_long),
        strfn::formatnumber(
            expression,
            digits.as_ref(),
            leading.as_ref(),
            parens.as_ref(),
            group.as_ref(),
        )
    ));
    registry.insert(typed_builtin!(
        "formatcurrency", 1, 5,
        (expression: variant, digits: opt_long, leading: opt_long, parens: opt_long, group: opt_long),
        strfn::formatcurrency(
            expression,
            digits.as_ref(),
            leading.as_ref(),
            parens.as_ref(),
            group.as_ref(),
        )
    ));
    registry.insert(typed_builtin!(
        "formatpercent", 1, 5,
        (expression: variant, digits: opt_long, leading: opt_long, parens: opt_long, group: opt_long),
        strfn::formatpercent(
            expression,
            digits.as_ref(),
            leading.as_ref(),
            parens.as_ref(),
            group.as_ref(),
        )
    ));
    registry.insert(typed_builtin!("formatdatetime", 1, 2,
        (expression: variant, namedformat: opt_long),
        strfn::formatdatetime(expression, namedformat.as_ref())));
}